Note : Les descriptions sont présentées dans la langue officielle dans laquelle elles ont été soumises.
~68593 :
This invention relates to apparatus for pack~
aging a strip of compressible material into a compress-
ed roll held by tapes or the like extending therearound.
This is a divisional application of serial num-
ber 210,988 filed October 8th, 1974.
The invention in total includes novel and inven~ -
tive apparatus, method and packaging developments. How- -
ever by reason of Patent Office requirements, the claims
directed to the apparatus are included in the parent
application serial number 210,988 filed October 8th,
1974 and a separate divisional application. Neverthe~
less for the convenience and assistance of the reader
in readily understanding the nature of the invention, -;
a description of all aspects of the invention is retain-
ed and is embodied herein.
Heretofore, strips of compressible material, and ~`
specifically building insulation, have been removed from
the end of the line on which they are formed and packag-
ed by workmen who individually handle the rolls. The
packaging heretofore has been slow and laborious with
the rolls requiring considerable handling. Further, the
packaged strips have not always been as neat or compress-
ed to the extent desired. Limited attempts to partially
automate the packaging of the insulation have not been
successful.
According to the present invention there is pro-
vided a method for rolling, compressing, and packaging
a flexible, compressible, elongate body, the method com-
prising the steps of (a) moYing the elongate body in a
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path parallel to its longitudinal extent, (b) direct-
ing a forward end of the elongate body lnto a confined
zone of generally circular transverse cross-section,
(c) wrapping the forward end of the elongate body in-
to a spiral while placing pressure on the entire portion
of the outer surface of the elongate body in the zone
except for that portion of the zone where the elongate
body enters, (d) positioning a plurality of tapes adja~
cent the other end of the body with an adhesive surface
on the tapes facing the outer surface, (e) moving part
of the adhesive surface into contact with the outer sur~
face of the body prior to entry into the zone so that
the tapes extend beyond the other end of the body and
(f) continuing to wrap the body into the spiral con-
iguration while placing pressure progressively on the
portions of the outer surface of the body within the :
zone at least until the other end of the elongate body
enters the zone and the tape adheres along its entire
length to the outermost wrap of the strip.
The package is comprised of compressed.fib-
rous material comprising a flexible, compressible strip,
said strip being arranged in a spiral configuration
and compressed radially, and two tapes wrapped around
the outermost wrap of said strip and overlapping the
exposed end thereof to hold the strip in the tight
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spiral configuration.
More specifically, the apparatus includes an inclined
suction conveyor aligned with the discharge end of a conveyor
of the production line on which .
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1~6~3593
the strips of building insulation are made. Typically, two
or three strips of the building insulation are formed in side-
by-side relationship and are discharged longitudinally off the
end of the conveyor, these also being simultaneously rolled
up and packaged. Each of the strips comprises a layer of
compressible fibers held together by a binder and in many
instances adhered to a backing sheet on which they are deposited
on the production conveyor line. The overall insulating strips
are commonly 15 inches or 23 inches wide with the thickness of
the compressible insulating layers varying from two inches to
six inches. It will be readily understood that a lengthy roll
of such a strip, capable of covering 50 to 75 square feet, by
way of example, can be quite bulky if not compressed substan-
tially when packaged. This is equally true if a number of
shorter strips or batts are packaged in end-to-end relationship.
In fact, the packaging should be limited only by the degree to
which the fibers can return substantially to the original thick-
ness after the packaged roll is opened. Heretofore, such strips
have usually not been compressed to the maximum extent po~sible,
short of causing permanent deformation of the fibrous layer.
The belt forming the loop in which the strip is packaged also
applies more uniform pressure around the strip than apparatus
heretofore known. The more uniform pressure produces less
"cold working" of the fibers and thereby increases their
ability to return to their original thickness from a more highly
compressed state. Hence, longer strips can be packaged in
the diameter previously used, or the same length of strip can be
employed with a smaller diameter package resulting.
A frame is located beyond the upper end of the
inclined conveyor on which is carried an endless movable belt.
~68593
The belt is positioned and driven so that a loop or pocket is
formed therein in alignment with the upper end of the inclined
conveyor. The compressible strip is moved onto and up the `~-
inclined suction conveyor with the end received into the loop,
with the belt being moved in a manner such that the strip is
rolled on itself with the backing sheet, if any, facing out-
wardly. The belt is maintained under tension as the roll is
wound so that increasing pressure is maintained on the roll as
the loop enlarges to accommodate the ever-increasing diameter
of the roll being packaged. The compressible strip is cut to a
predetermined length on the production line and as the trailing
end of the strip moves up the inclined conveyor, tape is applied
thereto, with a portion of the tape adhered to the trailing end
of the strip and a portion of the tape extending rearwardly
thereof. The latter portion of the tape is adhered to the
previous wrap of the strip as it is carried with the strip into
the lo~p of the belt. It has been found by employing two
tapes for each package, no additional overwrap is required,
which constitutes a nuisance since it must be disposed of by
the contractor at the building site. Consequently, the roll is
completely packaged by the time the strip moves into the loop
and turns approximately one more revolution to cause the tape
to adhere to the previous wrap. At this time, a portion of the
frame is swung away to straighten the portion of the belt
forming the loop and to cause the roll to be ejected downwardly.
Up to this point, the insulation is not touched at all by h~man
hands.
A multi-zone, suction conveyor is used to feed the
compressible strip into the loop and also the tapes. This
conveyor provides a firm grip on the strip when moving it into
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the loop and also maintains the tapes in proper position on the
conveyor during the movement. The multi-zone conveyor also
provides a grip on the forward end or trailing end of the strip
even when the strip does not cover the entire conveyor and the
suction holes on the conveyor belt are not all covered.
It is, therefore, a principal object of the invention
to provide improved method apparatus for packaging compressible
material in strip form and a new and useful package resulting
therefrom.
10Preferred embodiments of the present invention will
now be described by way of example wi~h reference to the
accompanying drawings in which:
Figure 1 is a schematic, fragmentary side view in
elevation of a production line and packaging apparatus embodying ~ -
the invention;
Figure 2 is a somewhat schematic top view of the
packaging apparatus of Figure l;
Figure 3 is an enlarged, somewhat schematic, side view -
in elevation, with parts broken away, of the packaging apparatus
of Figures 1 and 2;
Figures 4-7 are further enlarged, somewhat schematic
side views in elevation of a portion of the packaging apparatus
and showing various components thereof in different positions
during the packaging and discharge of a strip of compressible
material received from the production line;
Figure 8 is a somewhat schematic view in perspective
of apparatus for maintaining tension on an endless belt of the
packaging apparatus;
Figure 9 is a detailed, schematic view in elevation of
an adjustable take-up which is part of the tension apparatus of
Figure 8;
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1068593
Figure 10 is a fragmentary, side view in elevation of
a portion of tape dispensing ap~aratus for applying tape to the `
trailing edge of the compressible strip; -
Figure 11 is a view in perspective of two adjacent
packayes of compressible strip as they exist when ejected from
the packaging apparatus;
Figure 12 is a schematic view in perspective of the
packaging apparatus, from the side opposite that of Figure 1,
showing means for facilitating removal of the endless belt;
Figure 13 is a view similar to Figure 12 but showing
certain components in another position; and
Figure 14 is a schematic side view of the apparatus
showing the belt about to be installed.
Referring to Figure 1, a production line on which a
compressible strip, specifically building insulation, can be
produced is indicated at 20 and packaging apparatus for
packaging the compressible strip is indicated at 22. The
production line 20 is of a substantially conventional design
and construction and will be discussed only generally. A fore-
hearth 24 receives heat-softened glass or other flowable, fiber-
forming material from a melting furnace 26 of a suitable, known
design in which raw material is reduced to a flowable or
molten state. The molten glass is fed to fiber-forming units
28 located beneath the forehearth 24. The units 28, by way of
example, can be hollow, rotatable members or spinners having
orifices in the peripheries through which glass is attenuated
into primary fibers. The primary fibers are then further
attenuated and directed downwardly by hot gaseous blasts from
blowers or burners (not shown) located adjacent the units 28.
The fibers move downwardly through a forming hood 30 and are
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sprayed with binder by suitable spray devices (not shown)
which direct the binder into the forming hood transversely o~
the fiber path. The fibers are then received on an upper
flight 32 of a foraminous, endless belt conveyor 34, the fibers
being collected as a mass or layer 36 of an approximate
predetermined thickness, and are carried along the conveyor
34 toward the right, as viewed in Figure 1. A suction char,lber
38 is located below the upper flight 32 of the conveyor, with an
exhaust conduit 40 connected to a suction blower (not shown)
for establishing a reduced pressure in the chanber 38. The
reduced pressure or suction assists in the collection of the
fibers on the flight 32 and also carries away the spent gases
of the attenuating blasts and organic particles from the binder.
The layer 36 of the fibers is advanced to a region
between upper and lower fora~minous belts 42 and 44 which are
positioned to compress the fiJ~ers somewhat into a fibrous layer
or body 46 of predetermined thickness. The foraminous belts
42 and 44 convey the fibrous layer through an oven or heating
chamber 48 in which the binder is set or partially cured on
the fibers at a temperature in the order of 450-500F. When
the layer 46 emerges from the oven 48, the edges are trimmed by
suitable rotatable knives 50 which remove uneven edge strips
from the layer 46. In this instance, a center one of the
rotatable knives 50 can also be provided to sever the formed
layer 46 into two narrower fibrous layers 52. A plow (not
shown) can be used to spread apart the two layers 52 somewhat
to leave a gap therebetween. At this time, a coated kraft
paper or similar backing sheet 54 can be applied to each of the
layers 52, these sheets being fed upwardly and underneath the
layers 52. The sheets can have an adhesive suitably applied
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to the upper sides thereof prior to being fed into contact with
the layers 52 to provide adhesion therebetween. The adhesive
can also help serve as a vapor barrier for the resulting
insulation and can also contain a suitable fire retardant.
The combinèd layers 52 and backing sheets 54 are then
carried along a discharge conveyor 56 and under a cut-off knife
58 which cuts the layers 52 and the sheets ~6 into building
insulation strips 60 (Figures 4-6) of predetermined length,
being long or short, the short strips being commonly known as
batts. The insulation 60, which constitutes compressible strips
in this instance, is carried from the discharge conveyor 56
onto a conveyor 61 and supply conveyor 62 of the packaging
apparatus 22. The insulation 60 is then moved up an inclined
~uction conveyor 64 toward an endless belt 66 carried by a frame
68. The conveyor 64 can be driven by a suitable gear reducer
mechanism 70 and a drive motor 72. The conveyors 61, 62, and
64 move at a speed in excess of the conveyors of the line 20
since each compressible strip of insulation must be discharged
after being packa~ed, thus resulting in a delay which must be
compensated for by the faster packaging speed for the insulation.
Actually, the belt 66 and the three conveyors 61, 62 and 64
move at increasing speeds from the cut-off knife 58 to the loop.
By way of example, assuming the speed of the belt 66 at the
loop is 100 percent, the speed of the suction conveyor 64 is
98-99 percent, and the conveyors 61 and 62 are 80-90 percent.
By way of example, the speed of the conveyor 56 of the
production line 20 can be 210 feet per minute with the endless
belt 66 operating at 500-550 feet per minute. With the loop
speed being the fastest, a controlled slippage occurs between
the belt and the strip which ~revents buckling at the loop.
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The belt 66 has a loop or pocket 74 formed therein
which is in alignment with the slanted conveyor 64 to receive
the forward ends of the compressible strips or insulation 60.
The belt 66 is driven by a drive roll 76 (Figures 4-7) which in
turn, is driven by suitable means such as a chain 78 (Figure 1),
idler sprockets 80, a drive chain 82, and a drive unit 84
located on an upper portion of the frame 68. The drive roll
76 is carried by a pivotable sub-frame 86 (Figures 4-7)
comprising a lower supporting frame bar 88 and two struts 90
and 92 pivotally mounted by a pivot pin 94 which is held by an
ear portion 96 of the frame 68. Actually, there is one of the ~
bars 88 and one of each of the struts 90 and 92 on each side -
of the packaging apparatus 22, beyond the ends of the drive roll ~ -
76. The drive roll 76 also drives a bend roll 98 and a number
of supporting rolls 100 through a plurality of V-belts 102,
seven of such belts being used in the particular instance. These
belts and rolls support the lower portion of the belt loop 74 `~
as it expands, and helps continue expansion of the loop in the
direction shown. The rolls 98 and 100 are also supported by
the supporting frame bar 88 through suitable side plates ~not
shown) extending upwardly from the bar 88.
The belt 66 is held against the periphery of the drive
roll 76 by a pinch roll 104 which is rotatably carried by a
lever 106 pivotally mounted on an axle 108 which also rotatably
carries the bend roll 98. The lever 108 is operated through
a pneumatic cylinder 110, being connected to a piston rod 112
thereof. The pinch roll 104 forces the belt 66 into driving
contact with the drive roll 76 when the piston rod 112 is
retracted into the cylinder 110. The timing of the operation
of the pinch roll 104 is important in forming the loop 74, as
will be ~iscussed more fully subsequently.
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Beyond the loop 74, in the direction of movement of -
the belt 66, the belt bends around a t}lroat roll 114 located
above an adjusta~le plate 116 which helps to direct the forward
edge of the insulation 60 between the rolls 98 and 114. The
plate also prevents the insulation from contacting the belt 66
above the throat roll 114 which would tend to kick the insulation
up and away from the loop 74. Side plates 117 are also
employed at the sides of the belts 102 to prevent telescoping
of the insulation 60, particularly when two or three narrower
strips are packaged instead of a single wide one. The plates
are adjustable in and out to control tne spacing therebetween.
As shown in Figure 7, even the lower edges of the side plates 117
are contoured around the supporting rolls 100 to prevent the
possibility of the insulation 60 being squeezed out therebetween.
It is important that the belt 66 be allowed to expand
at the loop 74 as the insulation rolls up therein and yet
tension must be maintained on the belt 66 in order to maintain
compressive force or pressure on the insulation 60 as each wrap
is rolled. For this purpose, a take-up or tension mechanism
indicated at 118 is carried by the frame 68. Referring to
Figures 4, 8 and 9, the take-up mechanism 118 includes
stationary idler rolls 120, 122, and 124 and two upper,
- vertically-movable take-up rolls 126 and 128. The rolls 126 and
128 are urged upwardly to place the belt 66 under tension but
move downwardly as the size o~ the loop 74 increases to enable
the loop to properly accommodate the ever-increasing size of
the package being forrned.
The take-up rolls 126 and 128 are supported by chains
130 and 132 which are wound on sprockets 134 and 136. The
chains do not extend completely around the sprockets but only
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sufficiently far to enable the take-up rolls 126 and 12~ to
move between their extreme upper positions, as shown in Figure
4, and their extreme lower positions, as shown in Figures 6 and ~
7. The sprockets 134 and 136 are affixed to spur gears 138 and -
140, respectively, with the sprockets and gears rotatably
mounted on axles 142 and 144. The gears 138 and 140, in turn,
are engaged by a common drive gear 146 keyed to a shaft 148.
There is a set of the gears 146, 138, and 140, the sprockets
134 and 136, and the chains 130 and 132 at each end of the take- -
10 up rolls. A drive sprocket 150 is affixed to one end of the `~
shaft 148 with a chain 152 affixed and extending partly around
the sprocket 150 and around an idler sprocket 154. The other
end of the chain is connected to a piston rod 156 of a piston
158 in a fluid-operated cylinder 160. The pressure in the
cylinder 160 is adjusted so that the torque exerted on the
sprocket 150 will substantially offset the weight of the take-up
rolls 126 and 128 of the take-up mechanism.
A cam member 162 is affixed to the opposite end of the
shaft 148 and has a chain 164 extending partly therearound and `
affixed thereto, and extending around an idler sprocket 166.
The opposite end of the chain 164 is connected to a piston rod
168 of a piston 170 in a fluid-operated cylinder 172. The cam
member 162 is designed to provide a wide variation in torque,
by variation in the length of the torque arm as measured between
the shaft 148 and the point of tangency of the chain 164 on
its periphery. The torque arm is small, e.g. two inches, when
the take-up rolls 126 and 128 are in their upper positions and
the torque arra increases rapidly as the take-up rolls move
downwardly, e.g. to a maximum of twelve inches, the maximum
being from two to six times the minimum, and more specifically
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three to four times the minimum With a constant pressure
for the cylinder 172, the tension on the belt 66 is low
initially and increases rapidly as the take-up rolls 126 and
128 move lower. If desired, the design of the cam mer~er 162 `~
¢nables the tension on the belt 66 at the loop 74, when the
loop is small, to be relatively low. The belt can then yield
more readily as the insulation initially enters it to enable
the package to be initially formed more easily and more smoothly
than with higher initial tension on the belt. The tension then
increases as the loop diameter increases to place additional
pressure on the insulation as the package increases. ~owever,
the cam member 162 can be shaped to provide even less pressure
on the package, if desired, as it increases in size.
.Beyond the take-up mechanism 118, the belt continues
upwardly around a split idler guide roll ~Figure 43, moving
back across the top of the frame 68, and around an idler roll
176. The belt continues downwardly around a lower split idler
guide roll 178 carried by the pivotal frame 86. Finally, the
belt extends around a slack control roll 180 (Figures 4 and 7)
back to the drive xoll 76. Each end of the slack control roll
180 is rotatably carried by a lever 182 which is pivotally
mounted by a pin 184 to the supporting bar 88. The lever 182
is pivotally moved by a piston rod 186 extending from a
cylinder 188 which is also pivoted by a pin 190 to the bar 88.
The roll 180 acts as an idler or brake on the belt 66 immediately
adjacent the drive roll 76 as the package is being built up,
and the roll 180 also controls the slack in the belt when the
frame 86 is opened, as will be discussed subsequently.
When the roll is complete and elongate, flexible
materials in the form of tapes to be discussed subsequently,
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have been wrapped thereon, the roll is automatica~ly dis-
charged. For this purpose, a piston rod 192 (Figure 4) is
pivotally connected by a pin 194 to an ear 196 at each of the
rear corners of the pivotable frame 86. The piston rod 192 -~
extends into a cylinder 198 which is pivotally connected by a
pin 200 to an ear 202 at the upper rear corner of the frame 68
formed by beams 204 and 206. The pivot pin 200 is spaced
substantially to the rear of the pivot pin 94 for the frame 86.
Consequently, when fluid is supplied to the rod end of the
cylinder 198 and the piston rod 192 is retracted, the frame 86
pivots in a counterclockwise direction to the position of
Figure 7. At this time, the fluid-operated cylinder 110 is
operated through sensing means, such as a proximity switch Sl,
to extend the piston rod 112 and move the pinch roll 104
outwardly. This immediately reduces the engagement of the
drive roll 76 with ~he belt 66, substantially stopping it. At
the same time, the switch S1 causes fluid to be supplied to the
blind end of the cylinder 188 to extend the piston rod 186 and
move the slack control roll 180 in a counter-clockwise direction.
This takes up substantially all slack in the belt 66 and
eliminates the loop 74 for the time being, causing a package
208 to be discharged downwardly from the apparatus 22.
After discharge, the piston rod 192 is extended once
again and the piston rod 186 retracted. As the frame 86
approaches its original position of Figure 4, the proximity
switch Sl causes the piston rod 186 to retract to place slack
in the belt 66 upstream of the loop 74, and causes the piston
rod 112 to retract to enable the pinch roll 104 to again
squeeze the belt 66 between it and the drive roll 76. This
causes the belt to immediately begin to move and causes a portion
to project between the roIls 98 and 114, forming the loop 74
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again. The operation of the pinch roll 104 thereby is
important in enablin~ the loop 74 to be formed. The apparatus
22 is then in its receiving position and ready to form a package
from the next compressive strip or strips cut off by the knife
58.
The initial size of the loop 74 can be adjusted by
controlling the positions of the stationary rolls 122 and 124.
As shown in Figure 9, this can be accomplished through bearing
blocks 210 for the rolls which are connected through screws
212 to threaded, fixed supporting members 214 having adjustable
hand wheels 216 to move the screws 212 up and down relative to
the fixed members 214.
To maintain the roll of the compress,ble strip in
compression, two lengths of tape are preferably applied to the
backing sheets of each roll. The length of tape preferably
should be applied so that about one-half the length is adhered
to the trailing end portion of the insulation 60 while the
other half can be applied to the backing sheet of the previous
wrap of insulation as the roll is rotated in the loop or pocket
74. However, variations in the application of the tapes are
possible. The tape can even be wrapped completely around the
package to overlap the joint thereof twice.
Referring to Figure 1, two banks of tape dispensers
218 are located below the conveyor 62. A tape transfer conveyor
220 is located in front of the dispensers 218 and is positioned
to receive tape from the bank which is in operation. The two
banks enable one bank to be refilled, serviced, etc. while the
other is in use. For this purpose, each of the two banks of
dispensers can be mounted on rails extending transversely of the
conveyors. For servicing, the appropriate bank is simply pulled
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out to one side of the conveyor for ready access. Tape from
the dispenser 218 is fed lineally along the transfer conveyor
220 to a lower end of the inclined conveyor 64.
In the dispensers 218, the tape is dispensed with the
glue or adhesive side facing upwardly. To properly activate ~-
the glue on the upper surface of the tape, a special applicator
indicated at 222 in Figure 10 is employed. A tape trough 224 is
mounted in front of the dispensing opening of the dispenser 218 -
with a suitable drain opening 226 therein for returning water
10 to a tank or receptacle 228. A soft bristle brush 230 has
bristles 232 and a head 234 which is affixed to a housing 236.
Water is sprayed from a spray head 238 having a supply line 240
extended to a suitable source (not shown) with the water directed
onto the bristles 232 from which the water flows uniformly
downwardly and onto the tape in the trough 224. Baffles 242
are located at the sides of the trough 224. Water intercepted
by the baffles flows to the side and through the drain opening
226. With this arrangement, the water is uniformly and
rapidly applied to the upper side of the tape. With the
20 special applicator 222 and the dispensers 218, the tape can be
dispensed ready for applying at speeds in excess of 40 inches
per second. The tapes are fed out along the conveyor 220 and
the inclined conveyor 64 until their upper ends are near the
conveyor 62. At this point, the tapes would tend to be dragged
along the conveyor 64 but the opposite ends of the tapes are
still held within the dispensers 218 so that the tapes remain
until the other ends are cut. At that time, the tapes are
carried up the conveyor 64 into contact with the insulation 60
or, when used, the backing sheets 54 of the insulation 60, and
are carried therealong into the loop 74. The timing of the
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tapes and lengths thereof are such that one-half of each of the
tapes is affixed to the trailing end of the insulation and the
other half is wound around and affixed to the insulation or the
backing sheet of the adjacent wrap of insulation. This provides
a secure package with a minimum amount of tape and yet a
package which maintains the high compressive forces on the
insulation after the package is complete.
The tape transfer conveyor 220 includes a perforated
belt 244 and a vacuum chamber 246 communicating with the upper
run of the perforated belt. A vacuum is established in the
chamber 246 by a source (not shown) connected therewith by a
flexible exhaust hose 248. The belt 244 extends around a head
pulley 250 and a tail pulley 252 with the conveyor pivoting
around the shaft of the tail pulley 252 to align the conveyor
with either of the banks of the tape dispensers 218. The
vacuum holds the tape down on the conveyor more effectively and
prevents the tape from being deflected transversely by air
currents.
As shown in Figure 3, the conveyor 64 also employs
vacuum. The conveyor 64 has a perforated belt 254 with staggered
openings 256, as shown in Fïgure 2. The conveyor 64 also has
several, three as shown, vacuum zones formed by vacuum chambers
258, 260 and 262 to provide a better grip on the insulation 60
which otherwise has a tendency to float when travelling at high
speed up the conveyor. The vacuum chamber 260 enables the
conveyor to grip a leading edge portion of the insulation even
though the upper chamber 262 is not covered. Similarly, the
trailing edge portion of the insulation will be gripped with
the aid of the vacuum chamber 262 even though the lower chamber
260 is not covered. The first zone formed by the chamber 258
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under the conveyor 62 grips the tapes and holds them in position
as they move upwardly on the conveyor 64 and into contact with
the insulation beyond the conveyor 62. vacuum for the three -
chambers 258, 260, and 262 can be established through suitable
ductwork 264 connecting the chambers to a blower 266 driven by
a motor 268.
Immediately before the loop 74 is a final suction
zone on the conveyor 64 established by a suction chamber 270 `~
connected by ductwork 272 to a separate blower 274. The final
suction zone provides an extra grab on the insulation and a
final thrust as it enters the loop.
Two final packages 276 and 278 are shown in Figure 11
in the form they are discharged from the apparatus. Each
package can contain one long length of the compressible -~
insulating strips or a number of short compressible insulating
strips or batts in end-to-end relationship. They are discharged
in contiguous, side-by-side relationship with the wraps of the
insulation 60 and the~ backing sheet 54 being in alignment to
provide flat ends on the packages, the wraps being restrained
by the side plates 117. Two tapes 280 and 282 are located
on each of the packages 276 and 278, and preferably extend
completely therearound. The two tapes are employed with either
15-inch wide or 23-inch wide insulation when no additional
overlap is used. The tapes are 3- to 4-inches wide and are
located near the edges of the packages, as shown. If reinforced,
the tapes can be as narrow as 2 inches. The tapes cover from
15 to 60% of the width of the package and preferably from 30
to 50% of the width. When the packages of insulation are to be
used, the tapes 280 and 282 can be simply severed at the
trailing edge of the insulation and the insulation installed
1~68S93
with the tapes left adhered thereto. With this arrangement,
there is no additional overwrap which must be removed and
subsequently disposed of, not an easy operation especially when
burning of it is prohibited.
The overall operation of the packaging apparatus 22
will now be discussed. When the leading edge of the insulation
60 passes a pair of electric eyes or other sensing device S2
located beyond the cut off knife 58, a first, tape delay timer
is started which provides a short delay and then starts a
second, tape length timer. At this time, the tape dispensers
218 feed out tape and continue to do so until the tape length
timer times out. The forward ends of the tape at this time are
on the inclined conveyor 64. When the trailing edge of the
insulation 60 passes the electric eye sensing device S2, a tape
cut-off delay timer starts. When this timer times out, the
tape is cut and at the same time a fourth, delay eject timer
starts. When the tape is cut, it is carried into the loop 74
with the trailing edge of the insulation. After the delay eject
timer times out, it actuates the cylinders 198 for the
pivotable frame 86 and causes it to swing out and discharge the
pac~aged roll. By this time, the tape will have been wound
onto the adjacent wrap of the backing sheet of the insulation.
The cylinders 110, 160, 172 and 188 also will operate through
their cycles. The cylinders are actuated temporarily so that
the frame 86 and the various components return to the position
of Figure 3 ready to receive another of the compressive strips
in a minimum of time.
From time to time, the endless belt 66 must be
replaced because of wear or damage. For this purpose, the
packaging apparatus 22 is equipped with special provisions, as
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shown in Figures 12-14. To remove the belt 66, the pivotal
frame 86 is swung to a partially-open position, as shown in .
E'igure 14, and held by a chain 284. The upper take-up rolls
126 and 128 are then lowered between the lower rolls 122 and 124
to clear the belt 66. The various interfering components such '
as the pinch roll, a chute, guards, cylinders and lines are
then removed as necessary to clear the belt. Two overhead
hangers or beams 286 and 2~8 which normally support the apparatus .
frame from the overhead support 204 are removed after a .
supporting boom 290 is swung into place, as shown in Figure 13. .
A workmen's platform 292, located about half-way up the
apparatus 22, is hinged by hinges 294 to a suitable supporting
frame 296. Bolts at the opposite longitudinal edge of the
platform 292 are removed and the platform 292 is swung down to
a vertical position. The belt 66 can then be removed, being
slid to the side of the apparatus on elongate yoke members 298.
When the belt is to the side, the supporting beams 286 and 288
can be replaced, the boom 290 swung out of the way to the
position of Figure 12, and the belt then lowered past the
hinged platform 292. For installing the new belt, the above
procedure is generally reversed.
Various modifications of the above-described
embodiment of the invention will be apparent to those skilled -~
in the art, and it is to be understood that such modifications
can be made without departing from the scope of the invention,
if they are within the spirit and the tenor of the accompanying
claims.
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