Note : Les descriptions sont présentées dans la langue officielle dans laquelle elles ont été soumises.
: ~OS~10~
This invention relates to apparatus for the delivery
of sheet material from a roll thereof and is particularly but
. not exclusively related to the packaging of coils of sheet
metal.
One operation in the packaging of coils of sheet
metal strip includes wrapping paper around the outer cylindrical
surfaces of the coil. The paper wrap is usually made wider
than the axial dimension of the coil so that axially over-
hanging portions of paper at each end of the coil can be
folded down on to the end faces of the coil and tucked into
- the eye.
It is an object of the present invention to provide a
new or improved apparatus for the delivery of sheet material
which will obviate at least some of the disadvantages associated
with known methods of sheet delivery. It is a more specific
object of the invention to provide such apparatus for use in
the packaging of coils of sheet metal.
In accordance with the above object and remarks, what
is being broadly claimed herein is an apparatus for delivery
of sheet material which comprises means for supporting two
rolls of the said sheet material for delivery from the apparatus
in parallel overlapping relation and opposed xoller sets pro-
viding a nip between which the leading edge of the sheet mate-
rial may be fed. At least one of the sets is a driven set
while the or each roller in at least one of the sets has or
have a flat along a portion of its circumference whereby,
when the flats in the said one roller set are disposed in
juxtaposition to the other roller set, a space is afforded
between the two sets. There are also provided a third support
roller, located on the delivery side of the proposed roller
sets, and a moveable cutter blade for the sheet material
located between the opposed roller sets and the third support
- 1 -
' -
- ,. ~ .
` roller. 10541Q~
With such an arrangement the sheet material may be
delivered intermittently, or "inched", from the apparatus upon
~- rotation of the roller sets. Also when the roller sets are
stationary with the flat on the or each roller of the one set in
juxtaposition to the other set the sheet material may be with-
drawn freely from the apparatus through the space between the
roller sets.
Such apparatus may conveniently be utilized for the
delivery of wrapping paper from a roll thereof supported in
the apparatus to the exterior of a coil of sheet metal being
packaged by means of apparatus and method described in British
patents 1,275,602; 1,434,014 or 1,492,934.
The apparatus preferably further includes means for
guiding the leading edge of the sheet material from each roll
in substantial alignment with the nip, whereby the sheet
material does not pass over either of the roller sets, and the
support roller has an upper edge lying in substantially the
` same plane as the nip.
An embodiment of the invention will now be described
with reference to the appended drawings wherein:
Figure 1 is an end elevational view of sheet delivery r
apparatus in accordance with the invention utilized, in this
~` embodiment, for the delivery of wrapping paper to a coil of
sheet metal; a differing diameter of coil to be wrapped being
shown in chain-dot outline;
Figure 2 is a more detailed end elevational view, to
an enlarged scale, of the delivery apparatus of Figure 1, and
Figure 3 is a cross-sectional view on the line III -
III of Figure 2.
The specific embodiment of delivery apparatus 10
illustrated in the drawings is adapted to receive two rolls
~(~54~0Z
12-14 of a standard width paper for delivery in parallel
overlapping relation to a coil 16 of sheet metal; the degree
of overlap being adjustable to provide an overall width of
wrapping paper co-related to the axial dimension of the coil
to be wrapped. The wrapping operation may form part of a coil
packaging process as described in British patent 1,275,602
or British patent 1,492,934 and the coil to which the wrapping
paper is delivered may be supported for rotation by means of
apparatus described in British
', /
1054~0Z
.`:
patent 1,434,014
The delivery apparatus 10 comprises a tandem pair of
paper roll supports in the form of open-topped troughs 18-
`~ 20 having respective gaps 22-24 at their lower forward faces
permitting emergence of wrapping paper from the respective
rolls 12-14. Forward of the troughs are provided two co-
operating lower and upper roller sets 26-28 defining a nip
therebetween for withdrawing the wrapping paper from their
- respective rolls. The roller or rollers in each set are
conveniently formed of, or covered by, a high friction
material such as rubber, and as illustrated, the lower set
26 comprises a single cylindrical roller 26a extending
substantially the full width of the troughs 18-20 whilst
the upper set 28 comprises a plurality of axially spaced
narrow width rollers 28a. Each roller 28a in the upper set
is formed with a flat 30 on a portion of its circumference,
all of the roller flats being in radial alignment whereby,
when the flats 30 are disposed in juxtaposition to the lower
` roller 26a, a space is afforded between the roller sets
2() through which the wrapping paper may be deiive~ed.
One or both of the roller sets 26-28 are driven whereby
paper from the rolls 12-14 is delivered intermittently from
the apparatus 10; the paper being withdrawn when the cir-
cular circumferential parts of the upper rolls 28a are
~5 gripping the paper against the lower roller 26a and with-
drawal ceasing intermittently when the flats~30 on the
. ':
: _ _
, ,~.
- .
1~5410Z
upper rollers are in juxtaposition to the lower roller.
When the roller sets are stationary, with the flats 30 of
the upper set in juxtaposition with the lower roller 26a~
paper may be withdrawn freely through the space.
~ithin each trough 18-20 which supports a respective
roll of paper 12-14 there are positioned yokes 32 attached
to pneumatic rams 34 actuated by control valves in such
manner that either roll 12-14 may be bodily moved in an
axial direction relative to the other roll for varying the
degree of overlap of the two sheets of wrapping paper
delivered from the apparatus. It will be appreciated that
the paper lying between the roller sets 26-28 will also be
moved laterally upon any actuation of the rams 34, but that
such movement is only carried out when the upper roller
flats 30 are juxtapositioned to the lower roller 26a.
In operation the degree of overlap of the two sheets
of paper from the rolls 12-14 is adjusted upon a visual
assessment by the operator of the desired overall width of
the wrapping paper and the roller sets 26-28 are actuated
for rotation whereby the paper is delivered intermittently
from the apparatus. It will also be appreciated that any
tendency for the wrapping paper to track off sideways is
reduced with this apparatus because, as the paper is
released once during every revolution of the flatted
rollers 28a, the natural tendency for the paper to spring
: ~0541~2
~- back to its original central position ensures that th~
paper is delivered straight.
After passing between the roller sets 26-28 the paper
passes adjacent a guillotine 36 and finally over a support
roller 38 for delivery to the item to be wrapped. Thus,
if a coil 16 of sheet metal is being packaged in accordance
with the patents and applications hereinbefore referred t~
the wrapping paper will be delivered intermittently from
the rolls 12-14 to the coil 16 and attached thereto by
adhesive tape. The roller sets 26-28 are then stopped
; with the flats 30 on the upper rollers 28a juxtapositioned
to the lower roller 26a and the coil 16 of sheet metal is
rotated withdrawing wrapping paper freely from the delivery
apparatus until sufficient is wrapped around the coil to
envelope it. Rotation of the coil 16 is then ceased and
the guillotine 36 is actuated to free the wrapping paper
` from the delivery apparatus. As illustrated herein the
guillotine 36 comprises a rotary knife which traverses across
the width of the paper by means of a motorised pulley
arrangement 36a, but it will be appreciated that any suit-
able design of guillotine could be utilised. The wrapped
paper is then secured around the coil by further adhesive
tape and the remainder of the coil packaging operation is
completed.
To facilltate loading the delivery apparatus with
rolls 12-14 of paper the whole base 40 of the apparatus
;~
.
:
~. .
lOS4~0Z
. .
--- may pivot downwardly upon pivot pin 42 taking with it the
lower roller set 26. When fresh rolls of paper are placed
in the troughs 18-20 a leading portion of the paper in each
roll 12-14 may be allowed to hang downwardly through the
respective outlet gap 22-24 at the forward bottom end of
: each trough whereby, when the base 40 of the apparatus is
closed by being pivoted upwardly, the paper is automatica~iy
threaded between the roller sets 26-28.
In order to prevent any tendency for the leading edges
of the paper to bend upwardly when they first emerge from
between the roller sets 26-28, a plurality of downwardly
directed air jets are provided in an air manifold 44
extending across the width of the roller sets for deflecting
the wrapping sheets downwardly towards the coil 16.
'
:
: - :
