Note: Descriptions are shown in the official language in which they were submitted.
~ 5~573
METHOD AND APPARATUS FOR PRODUCING
SHRUNKEN PILFER~PROOF NECK LABELS_FOR CONTAINERS
~he invention relates to method and apparatus for
making labels for containers of shrinkable, polymeric mater-
~ ial that are predecorated in web form and trans~erred onto
an ambient temperature co~tainer and heat shrunken onto the
~ontainer ~or snugly encircling the neck and closure poxtions
of the contai~ r. Preferably, in the case of bottles having
screw caps, ~or example, the shrunken label will also include
a pilfer-proof feature of the type that visually signifies
tampering with or initial removal of the closure.
BACKGROUND OF I~E INVENTION
The invention disclosed in
U. S. Patent 3,951,292 issued April 20, 1976
entitled "Pilfer~Proof Neckband for a Bottle" provided a
need for a production machine and process to produce the
labelled bottles.
Since the nature o the product ca1ls for shrinking a
cellular polymeric material that is oriented for contraction
upon sufficient heating onto a glass bottle, or example,
that is filled with a product such as food, beverage or beer,
the encircling label needs to be contracted onto a relatively
cold bottle without benefit o preheat. The cellular mater-
ial, on the other hand, is a héat insulator and has a rela-
tively low thermal transmission rate through the material
~rom its outside to inside surfaces. In prior processes,
such as m~ U. S. Pa~ents ~o. 3,767,496 and 3,802,942, the
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cellular polymeric material has been subjected to heating
on opposite surfaces by preheating the base article to
which the encircling form of the material is applied to a
temperature of 225F or more. When applying the encircling
S form of cellular, shrinkable material on capped bot~les con-
taining food products or the like, i~ should be apparent that
preheating of this nature is impractical, and the bottles
need be at ambient temperature when the shrinking by heat
takes place. This requires shrinking the material onto the
~0 ;'cold" bottle by applying heat sufficient for shrinking lt
from the external surface. In so doing, the insulating
effect of the cellular plastic invariably creates wrinkles
in the encircling material as it is shrunken. When using
the material as a label or for decorative purposes on the
bottle, the random and uncontrolled wrinkling in the material
as it shrin~s produces an unsatisfactory appearance of the
product.
Sl~MMARY OF THE INVENTION
In the present invention, a practical method is devised
for applying a hollow tubular sheath or sleeve of a shrink-
able organic thermoplastic material, especially of cellular
material, over the neck and closure skirt portions of a cold
bottle and controlling the wrinkles of the product resulting
in a superior labelled product from the standpoint of appear-
ance and performance. ~he method also provides for making
the product pilfer-proof by partially slitting the thickness
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. ~L~5~573
of the material along a line that will be along the annular
perimeter of the skirt edge of the bottle closure, and open~
ing the bottle by unscrewing the cap or tampering with it
~ causes a visual sign by the severing of the label on this
annular score line. To assure the sleeve label is ~irmly on
~he neck o the bottle and such line severing will occur,
the invention provides for adhesively securing the neck
overlying portion of the label onto the bottle where neces-
sary. In the preferred form of the method, the bottle neck
is pretreated with an adhesive. One convenient adhesive is
an aqueous emulsified type which dries to a tacky condition
on the glass. The shrunken sleeve is adhered to the neck of
~he bottle si~il~r to the action of a pressure sensitive typ~
adhesive, thereby bonding that portion of the shrunken la~el
firmly onto the bottle surface. Twisting of the label por-
tion over ~he cap skirt assures severing the label along the
line of the partial-depth slit dividing it into upper and
lower portions on the closure skirt and bottle neck, respec-
tively.
~he present invention also provides a machine capable
of automatic production for making the sleeves of the shrink-
able material from a predecorated or preprinted web supply
and assembling the sleeves onto the upper ends of the capped
bottles handled in the machine and registered thereby. The
bottles re~eiving the label sleeves are discnarged ~rom the
machine and conveyed in a heating device that will apply 'he
proper heating for shrinking the labels in place to complete
the package.
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1058~73
In the machine~ subcombination structures provide the
following:
1. The web supply is processed through a knife device
making a longitudinal line, partial-depth slit in the material.
2, The web i5 moved pas~ a device for formin~ cross-
. flute~ or pleats in the material at spaced intervals so that
each sleeve length taken rom the web will have two or more
pleats therein.
- 3. The web is then moved onto a eed device which
measures a length of the material on a drum surface and a
rotary cutter severs the length on the drum into a label
blank. The drum carries the leading end of the blank into
, engagement with a rotary mandrel that has a cylindrical
windi~g surface somewhat less in peripheral dimension than
the length of the blank~
~. The rotary mandrel mechanism is provlded with a
vacuum at the periphery to hold the label blank in place, and
a mechanism operates the mandrel to rotate it about its
longitudinal axis for wrapping or winding the blank strip
thereonO Several mandxels are carried on a rotary turret o~
the machine and each mandrel unit includes a hot air nozzle
system for heat weLding or bonding the overlapped ends of the
blank on the mandrel. Hot air is furnished by the nozzle
which extends the length of the over~apping seam of the blank
at a time just before the opposite ends ~- the leading and
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trailing ends of the blank -~ are a~out to overlie one another.
The heat is sufficient upon engagement of the overlapped por-
tions to join or heat seal the material at a side seam and
form a sleeve.
5. A blank guide block i9 employed on the machine and
it situated adjacent the path of the mandrels in tuxret
rotation. The guide block face is perforated and parallels
the path of the mandrels beyond the feed drum. A suction
is pulled at the guide block in a direction away from the man-
drel, and during travel past the perforated guide surface the
~ree end portion o~ the blank (the portion not wrapped on the
surface of the mandrel) is controlled.
6. A press roll device is situated in the path of
the mandrels just beyond the guide block ~or an engagement
with the seam of the sleeve on the mandrel for pressing that
heated area of the sleeve, and, i~ need be, somewhat compres-
sing the overlapping thicknesses of material to smooth out
or "feather" the seam on the label.
7. The machine includes a bottle handlin~ apparatus
which times the entry of bottles into the machine and conveys
them into an indexed co-axial position of registry under a
mandrel. The mandrel device includes an axial stripping
mechanism which is operated to drive the sleeve from the
mandrel and over the bottle cap and neck to its label position.
B. The machine includes with the bottle timing device
an applicator device for applying a quantity of adhesive to
the bottle neck as it enters the machine.
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9~ A drive system operates the various devices
synchronously where need be, to perform a continuous
production of the machine.
Thus, in accordance with the present teachings, an
apparatus is provided for labelling containers. The apparatus
includes means for moving an elongated web o~ flexible
sheet-like material in a longitudinal direction with means
being provided for engaging the moving web for carrying it
in a feed path defined by an endless surface, the means
for engaging the web includes a vacuum means connected to
the endless surface for holding the web thereon. Rotary
knife means is provided cooperating with the endless web-
carrying surface for cutting the web thereon across its
width and severing a label length from the web. A turret
is provided which is rotatably supported on a vertical shaft
with a plurality of mandrel means being provided in circular
array on the turret, each mandrel means has an annular
mandrel surface rotatable about an axis parallel to the
shaft and movable in an orbit which is tangent with the
feed path of the carrying means thereat engageable with
the leading portion of a label. The mandrel means includes
a vacuum for holding said engaged leading portion on its
annular surface with the peripheral dimensions of the annular
surface being less than the length of the blank. Means are
provided connected to the rotatable mandrels operable for
winding the label thereon with heater means provided
individual to each mandrel means and comprising an elongated
air nozzle connected to a source of heated air and operable
in response to wrapping the label on the mandrel surface for
blowing hot air onto the overlapping surface of the leading
and trailing end portions of the label on the mandrel, the
heated end portions heat sealing one to the other on the
lB
~51~
mandrel in seam fashion thereby forming the label into a
hollow sleeve. Pocketed wheel means is provided connected
on the turret in underlying relation to the mandrel and
rotatable about the shaft with the wheel means including
plural container receiving pockets corresponding to the
mandrels and in vertical registry therewith. Guide means
are provided for engaging the containers and inserting them
in the pockets of wheel means with the axis of the containers
disposed vertically and in substantial registry with the
vertical axis of the mandrels~ The guide means retain the
containers in the pockets for partial orbital movement with
the mandrels. Stripper means is provided individual to each
mandrel and operable for axially vertically downwardly
stripping the label sleeve from the mandrel and onto an
underlying container.
In accordance with a further embodiment, an apparatus
is provided for labelling containers. The apparatus comprises
means for feeding a succession of rectilinear labels of a
flexible sheet-like material in an on~edge attitude in a feed
path defined by a vertical feed surface. A turret is provided
rotatably supported on a vertical shaft with a plural mandrel
means provided in a circular array on the turret, each
mandrel means having an annular mandrel surface rotatable
about a vertical axis. Drive means is provided connected to
rotate the turret and thereby move the mandrels in an orbit
tangent with the feed path whereat the mandrel surface is
engageable with the leading portion of the label, the mandrel
means includes a vacuum means for holding the engaged leading
portion on the mandrel surface with the peripheral dimensions
of the mandrel surface being less than the length of the label.
Means are provided connected to the rotatable mandrel surface
and operable for winding the label thereon. Heater means is
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provided operable in response to wrapping the label on the
mandrel surface for heating the leading and trailing end
portions of the blank prior to overlapping the portions on
the mandrel, the heated end portions overlapping one another
on the mandrel in seam fashion thereby forming the label into
a hollow sleeve. A pocket wheel means is provided connected
to the turret underlying the mandrels and rotatable about the
vertical shaft, the wheel means has plural container receiv-
ing pockets which correspond with the mandrels, each pocket
is in underlying registry with a mandrel. Container inlet
means is provided conveying a single line of upright con-tain-
ers with guide means for engaging successive container of
the single line and loading them in the pockets of the wheel
means in upright position in vertical registry with an over-
head mandrel, the guide means extends through a partial orbit
span of movement of the mandrels defining a label transfer
station. Stripper means is prsvided individual to each
mandrel and operable in response to orbital movement of the
mandrel through the label transfer station for axially
stripping the formed sleeve downwardly from the mandrel and
onto an underlying container.
Although the method and machine herein described are
characterized in terms of the preferred embodiment, namely,
the production of a shrink labelled glass bottle, the inven-
tion may be utilized in forming a sleeve of the material and
applying it and shrinking it over a variety of articles,
including for example plastic bottles, cans, jars, tumblers
or containers of various types and forms.
Various combinations of utilization of the subcombina-
tions in the disclosed machine, or in modifications for
utilization of the machine for the production of various
articles or products thereon will undoubtedly occur to those
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1~5~573
skilled in the art. Although a prefe~red emhodiment is
herein disclosed, such disclosure is in no way intended as
limiting the invention beyond the scope set out in the
appended claims.
BRIEF DESCRIPTION OF THE DRAWINGS
FIGURE 1 is a perspective ~iew of the machine of the
invention.
FIGURE 2 is a partial top plan view of a portion of
the machine with parts broken away.
FIGURE 3 is a partial top plan view of the remaining
portion of the machine and is a companion view to Fig. 2.
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lOSt~5~3
FIGURE 4 is a sectional elevational view o~ the machine.
FIG~RE 5 is a schematic drawing, in perspective, showing
the drive system for operating the various components of the
machine.
FIGURE 6 i~ a top plan view illustrating the mandrel
drive and ~am assembly and the vacuum manifold.
FIGURE 7 is a sectional elevational view taken along
line 7-7 on Fig. 3.
~ FIGURE 8 is a fragmentary perspective view of the man-
drels and press-roll mechanism for c~mpleting the vertical
seams on the plastic sleeves made on the mandrel~.
FIGURE 9 is a section~l elevational view of mandrel
mechanism of the machine.
FIG~RE 10 is a sectional elevational view taken along
line 10-lO on Fig. 3.
FIGURE 11 is a sectional plan view taken along line 11-11
on Fig. 10.
. FIGURE 12 is a sectional elevational vie~ taken along
line 1~-12 on Fig. 3.
FIGURE 13 is a sectional plan view taken along line 13~13
on Fig. 12.
FIGURE 14 is an eleva~ional view, partly in section,
taken along line 14-14 on Fig. 3O
FIGURE 15 is a sectional elevational view taken along
line 15~15 on Fig. 3
FIGURE 16 is a sectional plan view taken along line 16-16
on Fig. 15.
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1~58573
FIGURE 17 is a fragmentary sectional elevational view
taken along line 17 17 on Fig. 16, illustrating the partial- -
depth cutting position of the kni~e element on ~he web.
FIGURE 18 is a perspective view of the hot air nozæle
S for heat sealing the overlapped ends o a blank on the
mandrel.
FIGURE 19 is a side ele~ational view, partly in section,
of the drive means for rotating the mandrelO
FIGURE 20 is a side elevational view o~ the stripper
mechanism for removing a sleeve from the mandrel and placing
it over an underlying bottle.
FIGURE 21 is a bottom plan view of a label blank that
is scored and pleated.
FIGURE 22 is a fragmented sectional elevational v ew
taken along line 22-22 on Fig. 21.
FIGURE 23 is a fragmented sectional elevational view
taken along line 23-23 on Fig. 21.
FIGURE 24 is a side elevational view o~ a bottle illus-
tratiny the application of a spot of adhesive material onto
the necX surface.
FIGURE 25 is a side elevational view, partly in section,
of ~ bottle shown on Fig. 24 with a label sleeve of heat
shrinkable~ cellular polymeric material assembled to label
position prior to shrinking.
FIGURE 26 is a side elevational view, partly in section,
of th bottle and label of Fig. 25 undergoir.g heat treatment
for shirnking the la~el sleeve onto the bottle closure and nec~.
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~5~573
FIGURE 27 is a top plan view of a label shrunken onto a
cold bottle illustrating the effect of random wrinXling of the _
label without employing the beneficial features of the prcsent
invention.
FIGURE 28 is a top plan view of a label shrunken onto a
cold bottle under the present invention.
FIGU~E 29 is a perspective view of the bottle and
shrunken label made according to the invention.
. FIGV~E 30 is a side elevational view, partly broken away
and in section, of the bottle and closure in use and employing
the visible pilfer-proofing featur~ of the invention.
~IGURE 31 is a top plan view of a hottle illustrating
a second embodiment of the form o~ la~el utilized in tne
invention, the label appearing thereon before it is shrunken
. _ _ _
by heating.
FIGURE 32 is a top plan view of the bottle of Fig. 31
after the label is shrunken thereon~
GENERAL DESCRIPTIoN OF THE MACHINE
The machine comprises several components connected
together to operate as a unit for th~ production of plastic
sleeves shrunken over the neck and closure of a container,
such as a bottle. The example of the present disclosure is
a glass bottle 10, such as shown on Fig. 24. Bottle 10 is
provided with a conventional screw cap ll whlch includes an
annular skirt portion 12. The cap skirt has a lower terminal
edge 13 that encircles the upper part of the neck 14 of
bottle 10.
~ i85i73
The object of the invention is to apply a plastic
label covering on the nec~ area 14, or a portion thereo~,
and cap s~irt 12. This is done by first forming a
~preferably) pre-decorated, shrinkable, foamed plastic
sleeve from a web o~ oriented polyst~rene plastic, for
example, on the order of 10 to 20 thousandths of an inch
in thickness. The plastic web 15 is brought to the machine
as a roll and mounted on a conventional supply reel (not
shown). A multicolor decoration 16 is pre-printed repeat-
edly along one surface o~ the supply web lS. The print
or decoration 16 for a label is contained over a longitu-
dinal span on web 15 a bit less than the length dimension
of a blank 18 (Fig~ 21) to be cut from web 15. There are
. spaced indicia ~not shown) printed along the lengthwise
dimension of a blan'~ 18. Each decoration cop~ is placed
on the web between these indicia marks. The width dimen-
sion 19 of web 15 (or blanX 18) is equal to the height
dimension of the label 20 after it is shrunken on the
~ot~le 10 (Fig. 29). The material of the supply roll of
we~ 15 is oriented (stretched) in the longitudinal dimen-
. sion of the web. There is little or no orientation in
the material in the cross dimension 190
BOTTLE HANDLING
Referring to Figs. 1-3, from a supply of bottles 10
and supply of plastic web 15, the plastic labels are formed
and assembled on the bottles as the latter pass through the
machine~ ~ ~ottle infeed conveyor 21 advances a line of
:1058573
bottles 10 into a right-hand infeed worm 22 whi~h includes
lands 23 which orient the bottles and space them at proper
center-to-center distance on conveyox 21 (see Fig. 2~. The
right-hand worm is driven in synchronized rotation w;th a
star wheel 24 having ~pper and lower stars which define
peripherally-spaced bottle pockets 26 contoured to receive
bottles 10 ln the proper orientation. The stars are fastened
on a vertical shaft 25 driven clockwise (Tig. 2) and timed
with worm 22 by suitable interconnecting drive means (not
shown). Bottles 10 are received between lands 23 of worm 22
and held in a line by side guide rail 27 which terminates
adjacent star 24. As seen on Fig. 2, bottle 10 is moved
into a pocket 26 on star 24 just as it leaves rail ~7 and
advances with conveyor 21 into engagement with the arcuate
guide plate 28 supported on vertical posts 29 and 30 attached
to the deck plate 31 o~ the machine frame. Plate 28 trans-
fers bottle 10 from conveyor 21 with star pocket 26, over a
dead plate 32 and into engagement with a second arcuate guide
plate 33 fastened on post 34 anchore~ on the machine deck 31.
Guide plate 33 includes upper and lower arcuate members whose
curvature is in a reversing arcuate direction from the curva-
ture of guide plate 28. Thusly, as guide 33 engages bottle 10
it is removed from star pocket 26 and inserted into a second
star wheel 35 at one of its peripheral pockets 36. Star
wheel 35 is comprised of upper and lower stars fastened on
vertical shaft 37 (Fig. 2) driven counter clock~ise and timed
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with the first star wheel ~4. While in a pocket 36 of
star wheel 35, bottle 10 is carried along arcuate guide
member 33 to a position on the periphery whereat bottle 10
is engaged by the pocketed bottle positioning wheel of the
S turret assembly comprised of upper and lower pocXeted
rotary members 38 and 39, respectively. (See also Fig. 4).
The upper member 38 has arcuate neck pockets 40 spaced
about its periphery at equal intervals for engaging bottle 10
.at its lowex neck region~ ~ower member 39 has arcuate~
shaped body pocXets 41 spaced about its periphery on a
common center axis with a corresponding neck pocket 40 to
receive and engage the body of a bottle 10. The mandrels
of the turret assembly~ to be presently described, are
co-axial with their respective pockets 40, ~1 of the bottle
positioning wheel 38, 39. The upper and lower rotary
members 38, 3g are interleaved with the peripheral region
of the second upper and lower stars 35 in a some~hat meshing,
overlapping relationship. A bottle 10 in pocket 36 will be
guided into the neck and body pockets 40 and 41 in this
overlapping region of the two and carried to engagement with
. a third arcuate guide member 4Z mounted on the frame opposite
positioning wheel members 38/ 39 and interposed vertically
therebet~een for engaging the bottle along its body wall
surface opposite pocket 41 o~ the bottle positioning wheel.
The wheel members 38, 39 are rotated in a clockwise direction
about the vertical axis of shaft 43. During bottle movement
~S~3573
along the arcuately curved guide surface 42 of said guide .
member by the bottle positioning wheel, the neck and
closure vertical axis of bottle 10 is maintained in align-
ment with the vertical axis o the mandrels on the overhead
S turre~. Such span of movement de~ines the label transfex
. station for assembling the sleeve label telescopically
over the neck and cap skirt of bottle 10 in a manner more
particularly hereina~ter described. ~he bottle neck and
cap, having re~eived a label sleeve element 18 thereon
during movement aLong arcuate guide 42 (labei transer
station), bottle 10 is thereafter introduced into one of
the pockets 44 on the third star wheel means 45 comprised
of upper and lower stars which mesh with the pockets of the
positioning wheel members 38, 39. The upper and lower
stars o wheel means 45 are fastened on a vertical sha~t___ __
47, which is driven counter clockwise (Fig. 2) in timed
relation to wheels 38, 39. A reversing curvature suide
member 46 is fastened on vertical posts (not shown3
. anchored on the frame deck 31 and defines an arcuate
reversing path for removal of bottle 10 from pocket 40, 41
. and inserting bottle 10 into a pocket 44. A fourth star
wheel means 48 is fastened on vertical shaft 49 and has
peripheral poc~ets S0 for receiving bottle 10 as it moves
along the terminal end 51 of guide surface 46. Fourth stax
wheel 48 is driven in a cloc~wise direction and carries the
bottle 10 along the arcuate path and onto an exit conveyor 53.
105~3573
The shaft 49 is timed from shaft 47 to provide a meshing
relationship of the pockets 44 and 50 of the third and
fourth star wheel means, respectiveiy. There is a sta-
tionary horizontal bottom dead plate 32 of nylon or
sui~able plastic of low friction material ~Fig. 4) sup-
ported on the machine deck 31~ The dead plate mem~er 32
extends over the reversing path of bottles 10 through the
inlet and exit star wheels and the intermediately located
~bottle positioning whePlO The bottles travelling in this
path slide over the bottom dead plate 32 for support while
propelled by the pocketed wheels 24, 35, 38, 45 and 48,
respectively ~Figs. 2 and 3).
Exit conveyor 53 carries the serial file of bottles 10
wi~h neck labels 18 in position thereon for shrinking into
a heating device 54, represented somewhat schematically by
the tunnel structure on Fig. 1. Conveyor 53 traverses the
length of the heating device 54 wherein heat may be supplied
by various known devices. One form of heater ~.hat may be
used is an elongated bank of infrared heating units. For .
bes~ distribution of heat~ the bottles may be rotated during
txavel through the tunnel by use o~ known conveyor devices
providing such rotation.
. Another form of heating device suitable for use in the
invention is circulated hot air. In this form, the bottles
may be conveyed longitudinally o the device 54 without
rotation, the heat being supplied by transversely circulated
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~ 105t~573
hot air aimed at the label region, and oriented by louvers or
baffling in the air circulation system of the heater so as to
concentrate the hot air at the total label area or apply a
differential of the heat to concentrate heat more heavily on
S the seam area, e.g. the embodiment of E'igs. 28 and 29. The
air temperature may vary depending upon the composition of
the polymeric material, its thickness in the label and the
time available in t~e tunnel to complete the shrinking of
the label sleeve onto the bottle neck and cap. The variables
in the heating device will be adjusted to the nature of the
product in the bottle so that the product will not be detri-
mentally affected. .
. The conveyor 53 next transfers the finished, labelled
bottles, such as shown on Fig. 29, to a location and means
15-- - - for packaging~ casing and shipment or storage.
. ~B SLITTI~G DEVICE
. Referring to Figs. 1, 3 and 15-17, the ~lexible web 15
is furnished from a supp~y roll (not shown) in an on-edge,
vertical attitude and is reeved over freely rotatable idler
roll 55 and onto a back-up roll 56 of the web slitting
device. Roll 56 is a cylinder that is rotatable on vertical
. shaft 57. Shaft 57 is supported at its opposlte ends in an
upper aperture 58 in horizontal top plate 59 of the as~embly
and in a vertically aligned apertuxe 60 in horizontal bottom
plate 61. Top plate 59 and bottom plate 61 are rigidly con-
nected by the vertical end plate 62 fastened to each by the
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cap screws 63. Shaft 57 has end bearing sleeves 64 pressed
thereon and sleeve 56 is rotatable about shaft 57 on ball
bParings 65 in the races 66 fastened at the ends of the
roll cylinder 56.
The roll cylinder 56 includes the annular rectangular-
like groove 67 at the preselected elevation thereon to
cooperate with knie blade 68 of the device. Knie blade 68
is ~astened on a T-block holder 69 by scxew means 73.
Holder 69 slides in the horizontal C-block 70 having elongated
guide surfaces 71 and 72 at the open end of the C configura-
tion. End plates 74 and 75, respectively, have adjusting
screws 76 a~d 77 threaded therein in alignment with each
other,.and the inner ends of screws 76,77 ~ear against the
opposite end faces of block holder 69 carrying knife blade 68.
By counter rotating screws 76, 77, blade 68 may be shifted
toward or away. from groove 67 on the cylinder roll. The
. position o blade 68 is set by locking nuts 78 threaded on
each of the end adjusting screws 76, 77. The blade holder
block 69 is held forward against guide surfaces 71 and 72
of C-block 70 by the pair of compressed springs 79 retained
. in recesses on the back side of C-block 70. Accordingly,
kni~e blade 68 is yieldably mounted in the assembly and is
flexible in the outward direction. Should an obstruction,
other than the web material, engage the knire blade in opera-
~5 tion, it may yield away from roller 56. The C-block 70
holding the knife assembly is adjustable vertically on the
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~5il3573
attachment to vertical end plate 62 by bolts 81 in the
elongated slots 82 and blade 68 is thusly positioned
vertically to align horizontally with groove 67 of the
¦ cylinder roll.
¦ In accordance with the invention, the knife 68 imparts
a score line 84 weakening the material of web 15 at that
line extending in the running direction of the web. The
score line 84 is shown on Fig. 22 in an enlargemènt and i5
ll characterized as a partial-depth slit in the plastic
¦¦ material from which the label blank 18 tFig. 21) is made.
ll The score line 84 extends lengthwise of the blank 18 and
¦¦ parallel to the longitudinal side 17 of the blank. The web
stock 15 is scored on the surface op~osite decoration 16
ll (Figs. 1 and 29), whereby the score line 84 will be on the
5 ll surface of the label next to the bottle and will not be
readily visible in the label until -the cap is turned and the
label severed along the line of weakening at the slit 84.
WEB PLEATIN& DEVICE
ll Another important assembly on the machine is the means
ll for providing piural pleats across the web so that ~wo or
il more such pleats appear in each of the la~el blanks. Refer-
ring first to Figs. 21 and 23, the pleats 85 are represented
as a crush or v-fold of the material as shown on the repre-
ll sentative cross-section of a pieat on Fig. 23. The pleats 85
25 ll appear across the width direction of the label blank 1~ and
¦~ are generally, as shown on Fig. 21, parallel to the width
dimension, (edge 19), of blank 18. However, the pleats need
not parallel edge 19.
11D5~573
Referring to Figs. 1, 3, and 12-14, the web 15 is fed
from the slitting device over a pull roll 86 that is driven
forward (counter clockwise on Fig. 3) for pulling web 15
through the slitting kni~e 68 and xoller 56, just described.
Pull roll 86 is fastened onto a vertical shaft 87 mounted in
ball bearings 88 and 89 a~ the opposite axial ends of pull
roll 86 (Fig. 14). Bearing 88 is retained in a sea~ aper-
ture 90 in the top plate 91 o~ the roller assembly. Top
.plate 91 is spaced from the bottom plate 92 by four hollow
tube ~upports 93 and bolts 94 extend through each of the
supports 93 to fasten the two plates 91, 92 together.
~ottom plate 92 is welded to angle brackets 95 which are
welded onto the top side of the elevated deck 96 of th~
mach~ne frame. The lower ball bearing 89 i5 retained by
a seat aperture 97 in bottom plate 92 and in vertical
axial alignment with top aperture 90. Pull roll 86 oper-
ates in conjunction with a second roll 98 mounted on
vertical shaft 99 which has a top ball bearing 100 retained
in an aperture seat 101 in top plate 91, and a bottom ball.
2a bearing 102 retained in a correspondingly vertically alignQd
. aperture seat 103 in ~ottom plate 92. The two vertical
shaf~s 87, 99 are driven in opposite directions of rotation
through the drive gear 104 fastened on shaft 99. Sha~t 87
is connected to the power train, to be described later herein.
From rolls 86, 98, the web 15 enters between pleating
roll 106 and back-up roll 107 ~Figs. 12 and 13). Pleating
roll 106 is fastened on vertical shaft 108 rotatably mounted
in bearings 109 and 110 in ali.gned seat apertures in the
~058573
top plate 59 and bottom plate 61, respectively, which is also
the rame connecting means for the web slitting device,
earlier described herein. The plates 59 and 61 are rigidly
connected by hollow cylinder columns 111 each having a bolt
112 through the column and the plates 59, 61~ A pleating
tool 113 is fastened in place on the face of the pleating
roller at a peripherally axially extending slot 116 formed
on the cylindrical surface of roller 106 by the sev0ral
screws 115. Pleating tool 113, in one embodiment of the
invention, comprises an elongated U-shaped insext element
having outwardly directed, spaced-apart tips 114. The extent
to which tips 114 project radially outwardly ~rom the cylin-
drical surface of roll 106 will determine the depth and
contour of the pleats 85 to be ormed in the web of the
material 15. Pleats 85 are formed from the side of the w~b_ _
opposite the side on which decoration 16 is printed. As
may be seen on Figs. 12 and 13, there is a relief cut at 117
on the outex edge of ~ips 114 along the cylindrical surface
of roll 106 to accomodate the compressed web material in
forming the pleats. Similarly, between tips 114 and along
the tool there is a relief or recess area into which pleated
plastic of the web may deform in the pleating operation.
B~ck-up roll 107 is formed of a steel cylindrical
core 107a covered with a uniform d~pth layer o rubber 107
or like yieldable material. Roll 107 is attached on vertical
shaft 118 that is mounted by ball bearing 119 in top plate 59
-21-
. ~ -- r
~L~5~3573
and ball bearing 120 in bottom plate Gl o~ the frame struc-
ture. Roll 107 is freely rotatable and is driven by nip
engagemel-t with the sur~ace of the web 15 travelling between
rolls 106 and 107. The circumference of pleating xoll 106
is equal to the length dimension 17 of a label blank 18.
In the example on the drawings (Figs. 12, 13 t 21 and 28),
the label stock is cross pleated in closely spaced pairs of
the pleats 85 and each blank is severed from the web approxi-
mately midway in between the pleats so that a pleat 85
appears near the leading edge and the trailing edge of the
blank 18. tsee Fig. 21). After the leading and trailing
ends o~ the blank are overlapped and seamed to a hollow
sleeve form, the pleats 85 are located somewhat in the
fashion represented on Figs~ 28 and 29. This represents
_ _ 15~_ _ _ the preferred embodiment of the invention.
By revis;ng the configuration of pleating roll 106t a
second embodiment of the invention is practical. This is
shown in result on Figs0 31 and 32, whereat pleaks 85 are
approximately diametrically disposed on the sleeve (Fig. 31)
and when shrunken on the bottle neck and cap (Fig. 32) appear
on diametrically opposite sides of the bottle. To achieve
this second embodiment, two single tipped pleating tools are
fastened on the periphery o the pleating roll 106 at a greater
circumferential spacing. Since the circumference of the
roll 106 is approximately equal to a cut label blank length,
location of the pleating tools or tips on the roll surface
. ,.
. -~2-
1058573
and spacing between tips, as well as nun~er of tips used,
provides for a wide variation in the array of multiple
pleats that may be formed in the label stock ~rom which
label blanks are to be formed.
LA~ D~V
After the scored and pleated web 15 leaves roller 106,
it is fed over a ~eed drum 121 which controls the web while
iabel blank lengths, such as label blank 18 (Fig. 21), are
~ut in succession.
Referring to Figs. 3, 10 and 11, feed drum 121 is
fastened onto shaft 122 and rotatably mounted by roller
bearinys 123 and 124. The ~eed drum is supported in a
separate frame from the slitting and pleating devices. The
support for the feed drum is comprised of the top rnember 125
and a spaced lower member 126 held together by hollow cyl~n-
drical standards 127 and bolts 128 extendiny through mem-
bers 125, 126 and standaxd 127. ~he lowex member 126 is
fastened to vertical brackets 129 (Fig. 3), which are bolted
to the deck 31 of the machine frame. The vertical leg of
brackets 129 places feed drum 121 at the proper elevation with
respect to the mandrel turret. Feed drum 121 is rotated by
driving sha~t 122 through gear 130 on its lower end in mesh
with drive gear 131 on the lower stub shaft 132. Shaft 132
is parallel with shaft 122 which is mounted on roller bear-
ings 133 and 134 housed, respectively, in the top member 125
and lower member 126.
.'
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.. ... ... . .
1058573
A vacuum manifold member 135 is fastened onto top
member 125 and fixed in stationary position. Vacuum mani-
fold 135 includes an arcuate manifold chamber 136 machined
as an open arcuate slot along the bottom face of the manifold
for selective connection with the foux vertical passages, 137a-
137d (Fig. 11) in drum 121 disposed radially inwardly from
the drum surfaces. The passages are each formed by a tube
insert 138 placed in a vertical bore parallel to the a~is of
the drum and provided with a longitudinal slot 139 facing a
series of radial vacuum ports 140 drilled radially inwar~ly
~rom the face of drum 121~ The passages 140 connect to the
manifold chamber 136 through the tube slot 139 and vertical
passages 137 in response to rotation of drum 121 along the
underside of manifold chamber ~36. Vacuum is connected to
manifold chamber 136 by pipe 141 threaded into the top inlet
port of the manifold member.
Referring to Fig~ 11, the vertical pa~sages 137 are
operable for connection to the vacuum manifold in pairs and
. are located approximately one quarter circle apart in drum 121.
As web 15 is approximately at a tangent point with the face of
drum 121, the vertical passage (137b on Fig. 11) moves into a
connection with the forward end of manifold chamber 136,
which applies a vacuum at the vertical row of ports 140 on
the face of the drum holding the web onto the drum. ~hrough
the transmission gearing, hereinafter described, and circum-
ference of drum face 121, the peripheral speed of drum face
l ~ 121 ex eds the speed oi web 15 as the latter is advancing
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~ ~ . . .. . .
~S8~3
from the pleating roll. As the ports 1~0 at 137b advance
toward the position shown for 137a, the drum face 121
slips on the web and the vacuum applied pulls web 15 taut
to the rotary cutter. After a cut is made by cutter 142,
the cut piece travels with dr~ ace 121 and separates the
. trailing end of the label blank from the leading end of
web 15.
Rotary cutter 142 is comprised of a cylinder 143
fastened on lower stub shaft 132 and an upper stub shaft
144, each stub shaft having end caps 145 holding the
cutter cylinder 143 for rotation of the cutter on the
common central axis of stuh shafts 144 and 132~ Cylinder
143 includes a vertical knife blade 146 in a milled vertical
slot in the cylinder. Blade 146 is backed by screws 147 and
held in the cylinder by screws 148 through slots in the
knife blade 146. The tip of blade 146 projects beyond the
face of cylinder 143 a distance approximately the thickness
of the material of web 15 and, in its vertical length,
knife 146 is the same as or greater than the width of web 15.
As may be seen on Fig. 11, for each revolution of cylinder
143, knife 146 cuts a length of the web to form a label
blank 18. After the transverse cut is made by knife 146,
the vacuum ports 140 continue to pull the web and as the
forward ports, such as shown opposite 137a, passes the line of
cut, the second vacuum ports, opposite 137b, are pulling on
the we~. At such time as the vacuum ports are opposite the -
~ 5~S73
position shown at 137d, the knife has again revolved into a
cutting position and the forward end of the web, now the
leading end o~ a label blank 18, is engaged onto the cylinder -
surface of a mandrel 149. As this end of the blanX engages
the mandrel surface, vacuum ports 140 opposite the passage
. 137d are disconnected from the vacuum in chamber 136. Label
blank 18 is now under o~ntrol of mandrel 149, as will be
presently descri~ed.
The feed drum 121 and rotary cutter 142 are driven
synchronously through the intermeshing gears 130 and 131.
MANDREL TURRET
Referring to Figs. 1~ 3, 4, 6, 9, 19 and 20, the
mandrel turret is supported on four vertical frame members
150A-D supporting an X-shaped top plate lSl. On the under-
side of top plate 151, a circular vacuum manifold 152 is
fastened in stationary position on a box spacer 153. A
vertical turret shaft 154 is s~pported in end bearing 15S
mounted in plate 151 and extends through a center opening .
. in box spacer 153 and manifold 152. The lower end of shaft
154 is supported in bearing 156 held in frame deck 31. A
bull gear 157 is drivably fastened onto the lower end of
shaft 154 below deck 31, and gear 157 is in mesh with a drive
gear 158 on the power output shaft 159 of drive transmission
160. Power input shaft 161 of transmission 160 is driven by
chain drive 162 from a main electric drive motor 163.
. . :
, _ . .
~L0585~3
Interm~diate the end bearings, shaft 15~ has an
elongated vertical rotatable tube 164 connected to the
shaft and rotating in bushings 165 and 166. A cylindrical
journal 167 supports the bushings and includes a lateral
arm 168 bolted onto the ver~ical leg of the L~bracket 169
welded onto de~k 31. This provides a stationary support
on the frame for the air heater manifold 170, later des-
cribed herein. Spider hub 171 is welded at the top end of
tube 164, and circular spider 172 is bolted onto hub 171.
The several mandrel unit assembiies are supported in a
circular arrangement on spider 172.
HF. MA~DREL ASSEM~L~
Each of the mandrel assem~lies is constructed sim~lariy
. (Figs. 4, 9 and 19). A pinion gear 173 is keyed onto spin~le
shaft 174 whic~ is rotatable on ball bearings 175 and 176
retained by the journal box 177 on spider 172~ Mandrel
cylinder 149 is fastened over the lower end of shaft 174
and retained by the end hub seal 178 and bolt 179 threaded
. in the central passage 180 of shart 174, the bolt 179
sealing passage 180 at the lower end of the spindle. Passage
180 connects to the annular slot 181 on the periphexy of
spindle shaft 174 into an annular chamber 182 ~ormed by the
enlargement of the bored wall 183 on the lower end of mandrel
extending from the internal annular shoulder 184 to the
internal end wall of hub seal 178. Plural axial parallel
slots 185a are cut along the periph~ral surface o~ the
mandrel wall (Figs. 9 and 18~. Radial ports L85 are disposed
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~ r-
` 105~573
along an axial line in the wall of mandrel 149, and each
connects with the several slots 185a (Fig. 18). The slots
185a are milled in the wall of mandrel 149 to provide the
plural, thin, elongated, grid-like openings through which the
vacuum is pulled against the surface of the label blank that
is being wound on the mandrel wall. Vacuum applied by the.
structure just described i5 preferred because of the ad-
vantages of increased holding force on the blank 18 and sur-
.face deformation of the material in the blank is virtually
eliminated.
In upper journal box 177, an annular seal sleeve 186
is mounted on shaft 174 in stationary position and is
retained between the bearings 175, 176. Sleeve 186 includes
an annular interior groove 187 providing a passage connection
to the central passage 180 of the shaft through the lateral
leg 188 bored in the shaft. Vacuwn is connected to annular
groove 187 by hose 189 (Fig. 4), which extends to the rotor
plate 190 of the vacuum manifold 152. Rotor plate 190 is
moùnted onto the spider 172 by lower annular member 191
welded thereto. Each hose 189 is connected onto the right
ang~e port 192 which opens onto the lower facing of station-
ary manifold 152 in alignment with the arcuate manifold
channel 193 formed therein with an open side facing down .
against the top surface of rotor 190. The vacuum is connec-
ted into channel 193 from a source piped to the machine at
conduit 19~ connected to vertical port 195 in manifold 1520
. . ............... . ..... ~ r-
~__.~___ . . . .
~S13~3
The arcuate extent o~ channel 193 is shown on Fig. 6 and
extends in the rotary path of the turret spanning the winding
cycle of the label blanks about the mandrel.
The winding cycle of each of mandrels 149 is con~rolled
by an endless positive, two-sided cam 196 fastened on the
underside of top plate 151 of the turret frame. Cam ~ol-
lower 197 runs in the track o~ cam 196 and is rotatably
connected on crank arm 198 o~ the bell-crank 199. The
cantilevered arm 200 ~s att~ched on the top side of the
journal box 177 (Fig. 19). Pivot shaft 201 is assembled in
the bushing 202 for pivotally mounting the ~ear segment 203
with bell crank 199. Gear 203 is fastened to the hub of
bell-crank 199 by cap screw 204. The teeth o-f gear segment
203 are in mesh with the teeth of pinion 173 on spindle
shaft 174.
BLANK WINDING C3NTROL GUIDE .,
.~
At the label transfer station whereat the label blank 18
is transferred from the feed drum onto the surface of the
mandrel, the leading end of the blank being held by vacuum
at the mandrel ports 185a, the rectilinear strip of material
(the blank) is wound by the mandrel as it travels forward
away from the feed drum. During this winding, the free
trailing portion (tail) of the blank is guided and controlled
. by wlnding guide device 215~ Referring to Figs. 1, 3, 4
and 7, device 215 preferably comprises a hollow box chamber
comprised of top wall 216, bottom wall 217 and a curved rear
.. ... _... .. - -_ - - -- --- t
~ . _ _ . , .
:L~S~3573
side wall 218. The front face of the device is arcuate and
corresponds to the arc of the circular path the mandrels
describe in travel past guide 215. The front of device 215
is perforated, or as shown, comprises plural, parallel,
horizontally disposed and vertically spaced plates or slats
219 providing on their vuter edges 220 a guide surface ~or
engaging the radially outwardly facing surface o~ a blank 18
as the mandrel carries it along this sur~ace. Slats 219
are welded to the side wall 218 near the opposite ends of the
chamber. A conduit 221 is connected to side wall 218 at
stub pipe 222 therein. Conduit 221 is connected to a source
of negative pressure (not shown); for example, an exhaust
fan for moving air in the direction of the arrows on Figs. 4
and 7.
The box chamber is mounted at the proper elevation on
the machine for engaging the blanks on the mandrels by
arcuate bracket 223 bolted at a flat angle plate 224 onto
vertical column 150A of the machine frame. Referring to
Fig. 3, it may be seen that duxing travel o~ a mandrel 149
from a tangent relationship with feed drum 121 toward the
near end of device 215, the cut ~lank 18 is drawn from the
face of drum 121. As the mandrel is opposite the guide
face 220 of the guide, the free tail portion of the blank
not yet wound on the mandrel surface is drawn against guide
face 220 by the outward flow of air (suction) in the chamber
of guide device 215. During the remaining travel of the
mandrel along the arcuate guide face 220, any portion of the
blank not on the mandrel is held in flat position against the
face 220. As may ~e seen on Fig. 3, the latter t~o mandrels
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.. . .. ... . . . ,, . . . .. . _. . .... ... ... . .. ~
~L~S8573
alon~ the aft portion o the guide surface have the trailing
end portio~ of the blank held on the guide face 220 as the
leading end of the blank approaches an overlapping position
at the guide face 220 by the winding rotation of the mandrel.
S This creates for a limited period a gap in the overlapping
ends of the blank between the inside surface of the trailing
end and the outside surface of the leading end thereof. Heat
is applied by the hot air nozzle tip 211 directed along the
height of the blank. When the two surfaces approach the
melting point of the material, the mandrel completes the
winding of the overlapped ends into surface engagement with
one another and the overlap is now approximately on tne
guide face 220 (see last mandrel 149 at the position opposite
stub pipe 222 on Fig. 3).
SLEEVE SEAM HEATING DEVIC~:
On Figs. 1-4 and 18 a heater means is illustrated
comprising a hollow, angled heat nozzle 210 terminating in
an elongated narrow band slot 211 at the tip of nozzle 210.
There is a heat nozzle 211 at each of the mandrel assemblies.
A cylindrical hollow casing member 212 is rigidly connected
to the underside of rotary spider 172 for mounting mandrels
149 (Fig. 4). Casing 212 has its central axis coaxial with
center shaft 154 of the machine. Noæzles 210 are fastened in
a radially depending fashion on the outer surface of casing
~12 and in communication with the radial ports 213 extending
through the wall of casing 212. All of the po~ts 213 are at
the same elevation so that they come into communic~tion with
~S~ 3
the stationary outlet head o heating eleMent 170. As shown
on Figs. 2 and 3, heating element head 170 includes an
arcuate face 170a sealingly in contact with the inner wall
of casing 212. The heat is supplied to head 170 by hot air
pipes 214 connected from a hot air source into the lower
stem pipe 170b of the heater. Hot air exits pipe 170b at
the top and is radially directed over the arcuate span o the
radial manifold chamber 170c of the heating element. During
rotation of the casin~ 212 past chamber 170c, heat via hot
air is conducted through a port 213 and into the body of
no7zle 210 issuing under some pressure at the narrow lony
band tip ~11. As shown on Fiys. 2 and 3, heat is applied by
tip 211 onto the interface gap of the material about to be
overlapped on the mandrel 149 at the sleeve seam. The
duration of heat application is established by the rotary
speed of the ~urret and the rotary displacement duration of
a port 213 in com~unication with the arcuate span of manifold .
chamber 170c on the heater head 170. The heater unit 170
is preferably operated at hot air temperature on the order of
about 300-500F in treating a web of foamed polystyrene o
about 0.015 inch thickness. Heat is applied by nozzle tip 211
as a puff of hot air under slight positive pressure for a
duration of between 0.1 and 0.2 seconds. This will satisfac-
torily heat the overlapping end portions o the interfacing
label blank wound on the mandrel or heat sealing them together
and bond this material at a vertical sleeve seam S indicated
.
-32-
- :'
. ~ ---- r
~5~573
on Figs. 28-29 and 31~32. The amount of overlap is shown
by the poxtion of longitudinal dimension S' on Fig. 21.
SEAM PRESSING ROLL
After the wrapped and joined blank is in sl~eve form,
the mandrel leaves the arcuate guide ace 220 of the wind-
. ing control device 215 and almost immediately thereafter,
the mandrel passes against a press or seal roller 225 which
presses the two hot overlapped surfaces (seam S) together
;and produces a firm seal of the material at this seam S.
Referri~g to Figs. ~-4 and 8, s~al roll 225 has a rubber
peripheral surface and is pivotally mounted on a vertical
shaft 226 extending into swing arm 227. Swing arm 227 is
pivotally mounted on bracket 228 by pivot pin 229. Bracket
228 is rigidly afixed to the vertical column 150B of the
machine ~rame. An inwardly dependent leg 230 of bracket 228
has a threaded slide rod 231 extending through leg 230 and
retained by a nut 232. A circular retainer member 233 is
threaded on rod 231 for adjusting the tension exerted by the
coil spring 234 that is compressed against leg 230 at its
one end and the face of retainer 233 at the other. The other
end of rod 231 has a clip 235 connected to the swing arm 227
at the slotted projection 236.
It may be seen that seal roll 225 is posltioned slightly
into the oxbit path of mandrels 149 and yieldable on the
~5 spring mounting just described. Mandrel 149 is oriented at
the point of meshing contact between the wrapped label 18
thereon and roll 225 such that the overlapped end portions
33~ .
~8S73
will momentarily engage the rubber sur~ace o~ roller 225.
As the mandrel orbits past roller 225, the pivot mounting for
the latter allows arm 2~7 to bump slightly away from the
mandrel against the yielding pressure in that direction
exerted by the spring assembly 231, 233, 234. This kissing
action o~ the roller on the vverlapped blank firmly presses
the seam S of the label sleeve and produces a proper seal.
MANDREL CYCLE
Referring to Fig. 6, the endless path of cam 196 surrounds
the center shaft 154 of the machine, the major part of the
cam path being shown in phantom outline. During rotation
of the turret (spider 172), cam follower 197, a part of
each mandrel assembly, is moved along cam track 196. The
path of the pivot pin 201 and mandrel spindle 174 is circular,
shown by the path N on Fig. 6. The path of cam 196 is
labelled, on Fig. 6, as the dashed orbital line. The man-
drels orbit clockwise about machine center shaft 154 in
path N. At the position shown in the upper part o Fig. 6,
gear segment 203 is moved to its furthermost counter clockwise
position, which it retains until the mandrel approaches the
referenced 90 position, whereupon the cam path 196 begins to
move, with respect to path N, so that gear 203 is actuated
clockwise setting the mandrel into rotation. Upon reaching
position B, mandrel position has been adjusted ~y rotation for
picking up a label blank at the trans~er point. At reference
B2, blank transfer begins at which time the arcuat~ vacuum
.
. - -34-
,-
. . ~ .
1058573
maniEold chamber 193 is connected with th~ mandrel to apply
vacuum at the peripheral ports 185 o~ the mandrel (Fig. 9).
This corresponds with the rotational location on the turret
of the transfer station (Figs. 3 and 11) whereat the leading
edge or end of the label blank 18 is transferred onto and
held on a mandrel 149. At reference B3 cam path 196 imparts
winding rotation to the mandrel. This rotation is transmitted
by gear segment 203 which imparts approximately a full revolu-
tion by the time reference line Cl is reached. At about this
location, mandrel rotation stops. Correspondingly, the wound
label on the mandrel is heated at the opposite ends and over-
lapped in orbital travel between reference C2, C3 and Dl.
While mandrel rotation is stopped in orbital travel between
reference D2 and El, the overlapped seam portion of the label
is moved past the seal roller for completing the sleeve's
vertical seam. The quiescent state of the mandrel rotation
continues past reference E3, whereat the sleeve is stripped
vertically downwardly from the mandrel and over the registered
bottle undexneath, in a manner to be presently described.
Between reference E3 and the 90 point, the gear segment 203
is reset to begin another cycle.
I~BEI. STRIPPING AND ASSEMBLY
-Once the label sleeve is formed on the màndrel, it is
stripped downw~rdly onto a bottle to assembled position for
heat contraction. The stripping occurs after the bottle is
brought into a pocket 40, 41 (Fig. 2) of the bottle pOSitiOI~-
ing wheel by the feed star wheel 35.
.. . . - ~ - - F
~5~573
; Since the turret machine includes the rigid connection
of bottle positioning wheel 38, 39 and the upper spider 172
(Fig. 4), pockets 40, 41 for the bottle are always in vertical,
axial alignment with a mandrel 149 of the mandrel assembly.
Therefore, orientation of the bottles by star wheel 35 will
place the bottles into an axially registered position on the
turret when seated in pockets 40, 41. This occurs at approxi-
mately re~erence line E2 (Fig. 2). Thereafter, the sleeve
label 18 is stripped axially downwardly over the bottle 10
and cap ll by the hereinafter described device.
Re~erring to Figs. 9, 19 and 20, each mandrel unit
includes a telescopically arranged C-shaped stripper collar
240, normally carried in the retracted, uppermost position
shown on Fig. 9. Collar 240 is attached at its lateral
boss 245 to one-end--of--a--linkage--comprised of vertical
link 24l and crank link 243 by pivot pin 242. Link 241 is
pin connected at its opposite end to the movable end of
horizontal crank link 243 by a lateral pivot pin 244. ~e
other end of link 243 is pivotally connected by a pivot
pin 247 to a projecting boss 246 that is anchored firmly
on the mandrel column (Fig. 9). The crank lin~ 243 includes
a laterally projecting boss 248 intermediate its ends which
has a cam roller 249 pi~Toted thereon by a roller pin 250.
Cam roller 249 run~ in cam track 251 which is an endless
(circular) horizontal cam path extending aroùnd the turrct
of the machine Fig. 9 and Figs. 1-3). Cam 251 rises and
~L~S8573 - I
falls vertically, as il]ustrated somewhat schematically on
Fig. 20, for driving the collar 240 on the mandrels between
lowered (stripping) and raised (inactive) positions. Cam 251
normally carries roller 249 along a raised path (Fig. 19)
as is also indicated at the extreme ends of Fig. 20. The
mandrels move from right-to-let on Fig. 20. After the
label sleeve 18 is formed on the mandrel 149, (right-hand
position, Fig~ 20), and bottle 10 is registered axially with
the mandrel (as shown), cam track 251 desc~nds to the posi-
tion shown in the center of Fig. 20. Cam roller 249,
following the cam contour, pivots crank link 243 downwai-dly
(counter clockwise) driving vertical link 241 downwardly.
This propels C-shaped collar 240 axially along mandrel 149
from its inactive, raised position to its lowered sleeve
lS strippi'ng''~-po--s~iti-on,--p~shing the label sleeve 18 in that
direction and eventually telescopically encircling the
bottle neck and cap skirt thereby, as shown in the middle
of Fig. 20. This is the assem~led position for;the shrink-
able label sleeve on the bottle and cap. The a~sembly o
sleeve, bottle, etc. is then ready to be transferred through
the third and fourth star wheels 45, 48 and onto conveyor 53
by which it is carried to the heating unit 54. With further
movement (left~to-right), cam track 251 raises~ picking up
roller 249 and raising C-shaped stripping collar 240 to the
raised, inactive position for the next cycle. The operation
of stripper collar in moving the label sleeve from the
1058$73
mandrel onto the bottle occurs in the rotation of the turret
between the reference lines E2 and A on Fig. 6.
The cam track 251 is circular and fabricated onto the
inside facings of the machine frame vertical columns 130A-D
~Fig. 1) by the threaded machine screws 260 extending through
hori7ontal slots 261 on a backing plate 262 and into threads
on cam member 251. The elongated ~lots 261 in the frame
hacking plate 262 allow a circumferential adjustment of the
cam 251 with respect to the turret for advancing or retarding
adjustments in the timing of sleeve strippiny.
ADHESIVE APPLICATION
As was mentioned earlier, the pilfer-proo feature o~
the label on the bottle is enhanced by attaching the lower
label sleeve portion below the score line 85 onto the neck
surface of the bottle for preventing movement of the label on
the bottle relative to any movement of the closure. Referring
to Figs. 1 and 24, the sleeve is attached to the bottle by
adhesive that is issued in a spot or gob onto the neck area
as the bottle is traveling into the star wheel 24 on the
infeed conveyor 21. The adhesive is preferably a tacky or
pressu~e-sensitive type of adhesive that will be operable
upon the shrinking of the sleeve label over the region of
the adhesive, the shrinking being a firm yripping action on
the area treated with the adhesive material. One example of
zdhesive mentioned earlier herein in the aqueous emulsion
type which dries to a tacky condition at the time the label
is applied to the bottle. The adhesive is supplied to the
-38- ~
._ ._, .. .. .
~1~58~73
storage vat o the control ~lnit 263 which contains a pulse-
pump and control. The adhesive is fed into the hose 267
connected to a glue gun nozzle 265. Nozzle 265 is supported
in position opposite a neck area of the bottle by a vertical
S support stand 266. The unit described is conventional
equipment, which includes a conventional photocell and liyht
beam combination spaced across the width of conveyor 21, the
control light beam being tripped (broken) by the front edge of .
the bottle as it approaches a pocket of the first star wheel
24. As the bottle txips the photo-electric control circuit.
the valve of the glue gun 265 operates to ~ire a ~uantity or :
spot 269 of adhesive at the bottle surface opposite the
nozzle 265 of the glue gun. Each bottle i6 treated, as .
shown schematically on the series of Figs. 24-26. After
the sleeve label is telescopically placed over the adhesive
spot 269 (Fig. 25) and the label is heated in the heater .
unit 54 (Fig. 26), the shrinkage of the label into surface
engagement forms an adhesive bond between the surface of
. the bottle neck 14 and the interior surface of the applied
label 18.
MACHINE DRIVE .
The power drive for the bottle handling, the turret,
the web handling and processing and the web feeding mechan-
isms is shown schematically on Fig. 5. A synchronous electric .
main drive motor 163 is drivingly connected by power trans-
mission means 162 (belt or chain) at the input shaft 161 of ,
:
. -39- .
. . l
.. . , ~.. _ . .. .. __ . _ . . __, _, ,_, , _, _,, _ . . ~ !
_ . _ .,, _ .....
` l~)S~3573
the power transmission 160. The output shaft 159 of t~le .
transmission is connected to drive g~ar 158 in mesh with
machine bull gear 157 which rotatably drives the turret of
. the machine and operates the mandrels 149 in their orbital
path about the shaft 154. Transmission drive gear 158 also
meshes with a gear 270 on the shaft 132 of the rotary kni~e .
assembly for rotating the cylinder 143. The directions of
rotation of the elements of the machine, schematically
shown, are indicated by the arrows on Fig. 5. Gear 131 of
the rotar~ kni~e is in mesh with gear 130 on shaft 122 of
~eed drum 121. Power is transmitted from gear 130 to the
shaft 108 through its gear 273 by a cooperating pair of idler
gears 271 and 272. The power transmitted to the shaft 108
operates the rotsry cutter device 106. Shaft 108 is also the
input shaft of a standard PIV ~positive infinitely variable~
transmission unit 274 hsving sn indexing gear 275. The rota-
tion of gear 275 inside the transmission unit 274 in either
. direction will advance or retard the pha~e position of output
shaft 280. Gear 275 is controlled by an indexing control
motor 278 operated by manual control 279.
Power output of the transmission 274~at shaft 280 is
transmitted by a gear 281 in mesh with gear 105 on th~ pull
rolls 98. Roll 98 operates with roll 86 through gear 104 in
mesh with gear 105 for pulling the web 15 through the knife
device 68 and moving the web into the pleating rolls 106 and
107 establishing the speed and phase position of the web onto
the feed drum 121.
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The conveyors 21 and 53 ~or infeed of the bottles to the
turret machine and outfeed of the bottles therefrom and through _
heating unit 54 are powered by their separate electric drive
motors (not shown~ at a speed compatable with the machine
production rate. For this purpose the conveyors may be
operated at a synchronous speed as a "slave" off the main
drive motor 163, which establishes the production rate o~
the machine. The powered star wheels 24, 35, 45 and 48 are
synchronously operated by known suitable powered transmission
means (not shown).
As may be seen from the description o the machine, the
invention provides a method of making a labelled, pilfer-
proo~ container by a series of steps compri~ed of providing
a web of a preprinted, heat shrinkable organic thermoplastic
material o predetermined width and thickness. T~e web is~~~ ~~~
scored lengthwise at a predetermined lateral position thereon
to ~orm a running score line in the form of a partial-depth
slit corresponding to a predetermined height location on the
labels formed from the web. At about the same time, the we~
is provided with transverse pleats at spaced apart intervals
of its length but less than a label length of the material.
Lengths are cut from the web to make label hlanks, each blanX
having plural transverse pleats thereon. The label blanks
are each wrapped on a mandrel with the score line extending
circumferentially of the mandrel and the score line surface
of the web placed adjacent the mandrel surface so that the
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ll 1058573
score line is not readily visible at the outside facing
surface of the label wrapped on the mandrel. The plural
ll pleats on the label extend generally in an axial direction ¦ _
¦ of the label on the mandrel. The ends of the label blank
are overlapped as the blank is wound around t~e mandrel and
the overlapping ends joined to each other by heat applied
at their open interface beore joining. The heat welds the
ends together as a seam and the seam is pressed by contact
with a roller means. ~he sleeve label is stripped axially
¦¦ `and downwardly from the mandxel over the top end of a con-
ll tainer in underlying coaxial alignmen~ with the mandrel.
¦¦ In the instance of the example of this disclosure, the
container is a bottle with a screw cap on the neck end thereof ¦
¦¦ and the sleeve is axially positioned thereon such that the
circumferential intexnal score line of the label sleeve is
adjacent the annular lower ter~-~nal edge of the cap. The
ll label sleeve fits relatively loosely over the cap skirt and
R bot~le neck. The label sleeve is then heated sufficiently
ll to~shrinX it into snug surface engagement with the bottle
0 li neck and cap skirt, t~e pleats in the label sleeve containing
any wrinkling that may occur to provide a good quality shrunken¦
label. The label may be adhesively affixed to the neck of
the bottle, whereby unscrewing movement of the cap will sever
ll the label along the score line and separate the label into
5 ~¦ upper and lower portions, the lower portion being affixed to
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1~58573
the neck o~ the bo~tle. Such severin~ of the label will
provide visual indication that the bottle has been opened
(pi~fered).
The apparatus and method of the invention provide for
applying heat shrinkable materials onto the neck, shoulder
and cap contours of a cold container in a practical and
efficient manner at production rates resulting in a satis-
faFtory label and/or pilfer-proof covering on a containar.
Having described a prefexred embodiment or embodiments
1~ of the invention, other and further modifications thereof
may be resorted to without departing from the spirit and
scope of the invention set forth in the appended claims.
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