[0001] This invention relates to a method and apparatus for restoring cores, and more particularly,
cores utilized for accommodating a roll of paper.
[0002] Newsprint and other paper used for printing is generally shipped from the paper mill
in large rolls. When the rolls are made up at the paper mill, they are wound on a
tubular core. Typically the cores are made of liner board and are usually provided
with metal caps of the type described in U. S. Patent 5,271,258, issued December 21,
1993 to Bernier et al.
[0003] In the press room or other printing plant, the roll is mounted on an unwind apparatus
with the core of the roll journaled on mandrels. Once the web of paper has been unwound
from the core, the core is generally discarded or returned to a paper mill to be recycled
as waste fiber. The core caps are first removed and restored for further use or sold
for scrap.
[0004] The paper rolls are wound and unwound at high speeds and are, therefore, susceptible
to misalignment while being wound, resulting in improper registry on the printing
press, requiring constant alignment correction. A slight inconsistency in the outer
diameter of 0.25 inches will cause the paper web, when being wound, to move away from
the end of the core that includes the portion with the larger diameter. It is important,
therefore, that the outer diameter be constant and retain its circular cylindrical
configuration. Likewise, the inner diameter must not vary so that the axis of rotation
is at the true center of the core and thus the roll of paper. Any out-of-center rotation
will cause similar winding and unwinding problems.
[0005] Thus, it has not been contemplated to reuse a winding core once it has been utilized
once other than to cut the core down to a smaller size. It has been found that after
a single use, the winding core has been somewhat damaged. Even though such damage
may appear negligible, the distortions in the outer diameter or center of rotation
are usually unacceptable. Thus, the practice in industry is to discard the winding
cores once a roll of paper web has been unwound therefrom. The discarded single use
winding core is then returned to the paper mill as scrap liner board to be recycled
as paper fiber.
SUMMARY OF THE INVENTION
[0006] It is an aim of the present invention to reclaim discarded winding cores and to restore
such cores to acceptable standards such that the restored winding core can be reused
as a winding core.
[0007] It is a further aim of the present invention to provide a method for restoring winding
cores.
[0008] It is a further aim of the present invention to provide an apparatus to economically
restore such discarded winding cores.
[0009] It is a still further aim of the present invention to provide an improved winding
core with superior dimensional parameters compared to conventional winding cores.
[0010] A method in accordance with the present invention comprises the steps of collecting
used winding cores, passing each core through a station for trimming the ends of each
core, passing each core through a coning station for centering the core in relation
to its outer diameter, grinding the outer surface of each core to a constant diameter
equivalent to an outer diameter standard less the thickness of a finishing web of
fiber material, providing a finishing web of fiber material with a length corresponding
to the length of the winding core being restored and having a width equal to the circumference
of the core being restored, and wrapping the finishing web of paper about the core
being restored.
[0011] In a more specific embodiment of the present invention, the method includes the steps
of recuperating used cores, selecting the winding cores by grade and length, passing
each core through a core tip puller station for removing the steel tips from the ends
of the cores, trimming the ends of the cores to remove crimping portions thereof,
passing each core through a coning station for centering the cores in relation to
their outer diameter, forming a female joint socket at one end thereof and a complementary
male joint socket at the other end thereof, joining the cores end to end with adhesive
to form an elongated multiple-length core master, grinding the outer surface of the
core master to a constant diameter equivalent to a predetermined outer diameter standard
less the thickness of a finishing web of paper, providing an elongated web of finishing
material equivalent to the length of the multi-length core master, and wrapping the
web about the core with adhesive so as to provide a constant outer diameter equivalent
to the predetermined standard, and then cutting the multi-length core master to desired
core lengths.
[0012] An apparatus in accordance with the present invention comprises a cutting table for
trimming the ends of each winding core wherein saw means are provided for cutting
off the ends of each core in order to remove any crimping marks, a coning station
downstream of said cutting table wherein coning means are provided for centering the
individual cores in relation to their outer diameters, grinding means for grinding
the outer surface of the core to a predetermined constant diameter, and means for
wrapping a finishing web of paper on the ground surface of the core, including a table
for laying an elongated web of finishing paper having a length corresponding to the
length of the core and a width corresponding to the circumference of the core, and
means for wrapping the finishing web of paper on the core with adhesive.
[0013] An apparatus in accordance with a more specific embodiment of the present invention
comprises a cutting table having a pair of spaced-apart cutting saws whereby the distance
between the cutting saws can be adjusted to the equivalent of the length of the core
being trimmed less the accumulated length of the portions of the ends to be trimmed,
a coning station including a pair of spaced-apart heads each adapted to engage opposite
ends of a trimmed core for the purpose of forming complementary female and male joints
on the opposite ends of the core, means downstream of the coning station for joining
the cores end to end to form a master core of a predetermined length representing
multiple cores, a grinding station being arranged downstream thereof and including
feeding means for feeding the so-formed master core by a rotating grinding wheel for
grinding the core to a predetermined constant outer diameter, and the means for wrapping
a finishing web of paper including a skiver for skiving the longitudinal edges of
the web of finishing paper, means for applying glue to one surface of the web to be
in contact with the core, the web wrapping station including a table, a web feeder
for feeding a predetermined length of web onto the table from a continuous roll, means
for picking up and laying the core master on the web, means for wrapping the length
of web about the circumference of the core master with the skived edges overlapping,
and means for cutting the core master into predetermined core lengths.
[0014] In another aspect of the present invention, there is provided an apparatus for wrapping
a layer of material about a cylinder including an elongated frame, a material web
feeding means at one end of the frame for feeding a predetermined length of web of
material horizontally and longitudinally of the frame, the web having a width equal
to the circumference of the cylinder, glue means for applying adhesive to the web,
means for picking up and positioning a cylinder over the web of material on the elongated
frame so that the axis of the cylinder is parallel to the longitudinal axis of the
web of material, means for bringing the web of material and the cylinder into contact
such that the adhesive will engage the surface of the cylinder, and means for rotating
the cylinder so that the web of material is wrapped completely about the cylinder.
[0015] A winding core for transporting a web of paper in accordance with another aspect
of the present invention comprises a circular cylindrical tube having ends and a predetermined
circumference, the tube having a first spiral fiber board substrate and a web of fiber
board material having a length equal to the length of the tube and a width corresponding
to the circumference of the tube, the web of material having skived longitudinal edges,
wherein the web of material is wrapped about the tube and forming a longitudinal seam
made up of the longitudinal skived edges of the web that have been overlapped.
BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Having thus generally described the nature of the invention, reference will now be
made to the accompanying drawings, showing by way of illustration, a preferred embodiment
thereof, and in which:
Fig. 1 is a side elevation showing a series of stations for partially restoring a
winding core;
Fig. 2 is a top elevation of the apparatus shown in Fig. 1;
Fig. 3 is a top elevation of a station shown in Fig. 1;
Fig. 4 is a side elevation of a further station shown in Fig. 1;
Fig. 5 is a top plan view of the station shown in Fig. 4;
Fig. 6 is a fragmentary top elevation of a further station in the restoring of the
winding core which would be downstream of the apparatus shown in Figs. 1 and 2;
Fig. 7 is an elevation of the station shown in Fig. 6;
Fig. 8 is a side elevation of a further station utilized in the restoring of the winding
cores downstream of the station shown in Figs. 6 and 7;
Fig. 9 is a fragmentary top plan view of the station shown in Fig. 8;
Fig. 10 is a top elevation of a further station associated with the station shown
in Figs. 8 and 9;
Fig. 11 is a fragmentary perspective view of a detail of the station shown in Fig.
10;
Fig. 12 is an enlarged fragmentary view of a detail of the station shown in Fig. 8;
Fig. 13 is a transverse cross-section of the station shown in Fig. 8 and taken along
line 13-13 of Fig. 8;
Fig. 14 is an enlarged fragmentary elevation, partly in cross-section, of a detail
of the station shown in Fig. 8; and
Fig. 15 is a block diagram showing the steps in accordance with the method of the
present invention.
DESCRIPTION OF THE PREFERRED EMBODIMENTS
[0017] Referring now to Figs. 1 and 2, there is shown a core preparation table 10 having
an inlet table 22 on which previously used or discarded cores C can be stored after
they have been sorted according to grade and length.
[0018] For instance, the winding core C, which is normally made of a fiber board material,
can come in different crush resistant categories, such as 400 lbs., 500 lbs., or 750
lbs. Eighty per cent of the winding cores are in a range of 55 inches, but this might
vary. Most cores will have metal end caps at each end of the core C. Thus, a preselected
batch of discarded used cores C are located on table 22 upstream of metal tip puller
station 12.
[0019] Downstream of the metal tip puller station 12 is a trimming station 14 made up, in
the present embodiment, of two identical but reversed saw tables for trimming the
ends of the cores. The next downstream station is a coning machine 16 best seen in
Figs. 4 and 5. The coning machine 16 serves to form a male joint on one end of the
core C and a female socket at the other end.
[0020] Station 18, shown in Figs. 1 and 2, serves to press a series of cores C together
to form a core master C
M. Downstream of the press machine 18, as shown in Figs. 6 and 7, is a grinder 20.
Finally, to complete the process, a core wrapping apparatus 100, as shown in Figs.
8 through 14, is located downstream of the grinder 20.
[0021] Referring now to Figs. 1 through 5, the inlet table 22 is provided with a hydraulically
operated gate member 24 associated with a slightly sloped table surface to allow cores
C to advance one by one towards the metal tip puller station 12. As shown in Fig.
3, the metal tip puller station 12 includes track 28 and a carriage 30 which travels
on the track 28. Puller head 32 is located on one end of the frame, as shown in Fig.
3, and an identical puller head 34 is located on the carriage 30. The carriage 30
will move towards the puller head 32 when a core is located on the frame 26 to engage
the ends such that the puller heads will engage the metal tips, and the carriage 30
will retract to remove the metal tips from the core C. The metal tips will be dumped
from the respective puller heads 32 and 34 into a storage bin 23 for restoration of
these metal tips.
[0022] The core C then advances through to station 14. As shown in Figs. 1 and 2, one end
of the core will be cut by saw 38 as it comes off feed table 36. The purpose of the
saw 38 is to remove one end of the core which may have crimp marks, such as from the
metal tips or caps. The core then passes through the next saw 44 in station 14 to
cut off the other end of the core in a like manner. These circular saws 38 and 44
are readily available. The core is trimmed on both ends to be reduced to 48.5 inches
from an original 55 inches.
[0023] The core C then moves on feeding table 37 to be engaged by the coning station 16.
As shown in Figs. 4 and 5, the coning station 16 includes a frame 48 having a track
60. A track 50 is mounted at one end of the frame 48 on platform 49. A carriage 52
travels on the track 50, and the carriage 52 mounts a router 56. Router 56 is the
female router, and the carriage 52 moves towards one end of the core C which is held
in a holder 58 near the end. Holder 58 is provided with measuring devices for measuring
the outer diameter of the core. These measuring devices can measure the outer diameter
of the core 300 times a minute.
[0024] A female socket C
V is formed by router 56 with reference to the outer diameter. A router 68 is mounted
on a subcarriage 66 mounted on a subtrack 64. The subtrack 64 is mounted on the carriage
62 which in turn travels on the track 60 of the frame 48. An outer diameter measuring
device and holder 58 is mounted on the carriage 62. The router 68 forms the male joint
C
S in reference to the outer diameter.
[0025] The core C is then delivered on table 69 and, in the present instance, is manually
laid in the press station 18 in a V-shaped trough 72 on elongated frame 70. A press
head 74 travels on the track 76 towards the aligned cores C in the trough 72. Adhesive
is applied to the joints C
V and C
S of each core C. Several cores C will be located end to end on the trough 72, and
the press head 74 moves to press the core sections in order that the jointed ends
C
V and C
S be coupled together to form a core master C
M.
[0026] Typically, a core master C
M will measure 180 inches and will be handled in the remainder of the core restoring
apparatus as cylindrical core master C
M.
[0027] Referring now to Figs. 6 and 7, the core master C
M is passed through a grinder 20 which includes a grinding head frame 80. Adjustable
grinding wheels 86 and 88, as shown in Fig. 7 and partially in Fig. 6, are effective
for grinding the surface of the core master C
M. The grinding machine 20 may be a Cincinnati grinding mill of the type known as Milacron
(trademark) Twin Grip Centerless Grinder. Each of the grinding wheels is mounted with
anti-friction profile truing in order to precisely grind the outer surface of the
core C
M to a constant outer diameter. Typically, since the finished core should have an industry
standard of 4.010 inches outer diameter, the grinding mill 20 will provide an outer
diameter of 3.985 inches on the cores C
M. Once the finishing web of liner board has been wrapped around the core, the core
should reach an outer diameter of 4.010 inches.
[0028] The core C
M is driven past the grinding wheels 86 and 88 by means of driven wheel assemblies
82 and 84, and the core C
M is supported on idler wheel assembly 94.
[0029] Cores that are provided with metal end caps generally have an internal diameter of
3.072 inches. If, however, the core is not intended to be used with a metal end cap,
the internal diameter is 3.000 inches.
[0030] Once the core C
M has been ground to its outer diameter of 3.985 inches, it is then sent to the wrapping
assembly 100. Reference is made to Figs. 8 through 14 with respect to the wrapping
assembly 100.
[0031] As shown in Figs. 8 and 9, the core wrapping assembly 100 includes a frame 102. A
web feeder and glue assembly 104 is provided at one end of the elongated frame 102.
A web assembly 103, as shown in Fig. 10, includes a roll of liner board web W being
taken off by the feed assembly 104, and the web W passes through a skiver 114 which
includes skiving wheels 116 shown in Figs. 10 and 11. The skiver, depending on the
thickness of the web W, will remove from .020 and .010 off each edge W
L and W
R. The skiving station is upstream from the feed and glue station 104.
[0032] The web W moves through the feed assembly 104 and through glue bath 118 and eventually
over tension roller assembly 119, including a spring mounted lever, and through the
pair of tension rollers 120.
[0033] Frame 102 is provided with a cutting assembly 108, as shown in Fig. 12, which includes
a cutting knife 122 on a pivoting lever 126 which moves in association with anvil
124 in order to cut the web W the exact predetermined length. The length of the web
W is determined by the length of the core master C
M.
[0034] The width of the web W is slightly greater, with the skived edges W
L and W
R, than the circumference of the core C
M, to be wrapped, so that the skived edges W
L and W
R can overlap at least within the parameters of the skived portions.
[0035] As shown in Figs. 8, 12, 13, and 14, the web support assembly 105 includes vacuum
feed conveyor 106 having suction cups 130 mounted on a vacuum box 134 which in turn
is mounted to a conveyor system which moves the vacuum box 134 with vacuum cups 130
along the longitudinal axis of the frame 102. The vacuum cups 130 act on the web W
to advance the web W to the full extent required to cover the length of the core master
C
M. Once the web W has been extended to the predetermined length, the knife assembly
108 is activated to cut the length of the web W. The web W is supported on the frame
by the elongated narrow platform 110, as shown in Fig. 13, and by the suction cups
130.
[0036] Once the web W has been laid out on the frame 102 as discussed above, a core master
C
M' in the magazine 112, is lifted by means of a core support assembly 142.
[0037] The core support assembly 142 includes a beam 144 which can travel laterally of the
frame 102 as will be described later. A pair of spindle assemblies 164 are mounted
on the beam 144 for travel along the longitudinal axis thereof. Each assembly 164
includes a sleeve 156 adapted to slide longitudinally on the beam 144, a bracket 158
extending downwardly, and the spindle housing 165 having a spindle head 166. The head
166 is mounted for sliding movement on a sliding sub-housing 167 slidably mounted
to the housing 165. The head 166 is rotatable by means of a motor in the sub-housing
167. The head 166 is frusto-conical, and the beveled portion is radially serrated.
[0038] The shafts 154, as seen in Figs. 2 and 3, are driven by motor 170 through the intermediary
of shafts 154. The shafts 154 each have a gear 152 which engages rack 150 on the top
of the frame 102. Thus, motor 170 is effective to move the core support assembly 142
laterally on frame 102.
[0039] As seen in Fig. 13, the pickup assembly 164 is adapted to pick up a core master C
M from the magazine 112 and move it to a position above the lateral center of the web
W.
[0040] As shown in Fig. 13, web support assembly 105 may be raised, by means of hydraulic
jacks 140 in increments corresponding to the different core diameters. Since the web
W has been provided with an adhesive on the top surface thereof, the web W will come
into contact with the surface of the core master C
M. The close contact of the web to the surface of the core master is effected by means
of a slicker assembly 174 which is actuated to raise the edge W
R. The core master C
M is rotated by the motor (in sub-housing 167) driving the spindle heads 166, and the
web W will thus be wrapped about the core surface. A pair of idler rollers 172 is
provided to ensure the close contact of the web being rolled to the surface of the
core master C
M. The skived edges of web W will overlap but will not form a seam of greater thickness
than the thickness of the finished web of liner board.
[0041] The completed core masters C
M are then removed from frame 102, and the cycle is repeated. The cores C
M are then cut into preferred core lengths. Metal tips may also be added to the restored
cores.
1. A method of restoring winding cores, comprising the steps of collecting used winding
cores, selecting and grouping cores according to grade and length, passing each core
from a selected group of cores through a station for trimming the ends of each core,
passing each core through a coning station for centering the core in relation to its
outer diameter, grinding the outer surface of each core to a substantially constant
diameter equivalent to an outer diameter standard less the thickness of a finishing
web of fiber material, providing a finishing web of fiber material with a length corresponding
to the length of the core being restored and having a width substantially equal to
the circumference of the core being restored, and wrapping the finishing web of paper
about the core being restored.
2. A method of restoring a winding core according to claim 1, wherein the trimming step
includes cutting the core at each end spaced a distance from the end of the core to
remove the end portions of the core which might contain crimping.
3. A method of restoring a winding core according to claim 2, wherein the coning step
includes determining the center of the core in relation to its outer diameter and
forming complementary male and female joints at each end of the trimmed core in reference
to the determined center of the core.
4. A method of restoring a winding core according to claim 3, wherein the cones are pressed
end to end and joined by the complementary male and female joints with adhesive to
form a master core of a predetermined length.
5. A method of restoring winding cores according to any of claims 2 to 4, wherein, prior
to cutting the ends of the core, metal tips are extracted from the ends of the core.
6. A method of restoring winding cores according to any preceding claim, wherein the
step of grinding the outer surface of the core includes grinding the outer surface
to a constant diameter relative to the determined center of the core.
7. A method of restoring winding cores according to any preceding claim, wherein the
wrapping step includes placing the cores, after having been ground, in a magazine
adjacent a wrapping station, moving a finishing web of fiber material and extending
it in a substantially horizontal plane on the wrapping station substantially parallel
to the cores in the magazine, applying adhesive to the web, cutting the web to a length
corresponding to the length of the core to be wrapped, picking up a core and moving
it over a finishing web extended on the station, bringing the core and the web into
contact with each other and rotating the core so that the web is wrapped on the core.
8. A method of restoring a winding core according to claim 7, wherein the finishing web
is skived along the longitudinal edges thereof to allow the edges of the web to overlap
in the skived area when wrapped on the core.
9. An apparatus for restoring cores, comprising means for sorting discarded winding cores
according to grade and length, a cutting table for trimming the ends of each winding
core wherein saw means are provided for cutting off the ends of each core in order
to remove any crimping marks, a coning station downstream of said cutting table wherein
the coning means are provided for centering the individual cores in relation to their
outer diameters, grinding means for grinding the outer surface of the core to a predetermined
substantially constant diameter, means for wrapping a finishing web of paper on the
ground surface of the core including a table for laying an elongated web of finishing
material having a length corresponding substantially to the length of the core and
a width corresponding substantially to the circumference of the core, and means for
wrapping the finishing web of paper on the core with adhesive.
10. An apparatus for restoring winding cores according to claim 9, comprising a pair of
spaced-apart cutting saws at the cutting table whereby the distance between the cutting
saws can be adjusted to the equivalent of the length of the core being trimmed less
the accumulated length of the portions of the ends to be trimmed.
11. An apparatus for restoring winding cores according to claim 9 or claim 10, wherein
the coning means include a pair of spaced-apart coning heads each adapted to engage
opposite ends of a trimmed core for the purpose of forming complementary female and
male joints at opposite ends of the core.
12. An apparatus for restoring winding cores according to any of claims 9 to 11, wherein
a press means is provided downstream of the coning means, wherein the cores having
complementary male and female joint ends are pressed end to end with adhesive to join
the cores in a multi-length core master.
13. An apparatus for restoring winding cores according to any of claims 9 to 12, wherein
a puller means is provided for extracting metal tips at each end of the core, the
puller means including a pair of tip pulling heads spaced apart on a puller table
and adjusted for distance between the puller heads, wherein the metal tips are grasped
simultaneously by the puller heads and the heads are drawn away to remove the metal
tips from the ends of the core.
14. An apparatus for restoring winding cores according to any of claims 9 to 13, wherein
the grinding means grinds the outer surface of the core to a substantially constant
outer diameter determined from the center of the core.
15. An apparatus according to any of claims 9 to 14, wherein the wrapping means includes
an elongated frame, a web unwind means and web feeder means at one end of the elongated
frame, glue bath means associated with the feeder means for applying glue to the web,
advancing the web in a horizontal plane on the frame, cutting means for cutting a
length of the web corresponding to the length of the core, magazine means adjacent
the frame for holding cores to be wrapped, the cores being parallel to the axis of
the web on the elongated frame, pickup means for engaging each core and moving the
core over the web extending on the frame, means to move one of the core and the web
into contact with each other, and means for rotating the core so that the web is wrapped
about the core.
16. An apparatus for restoring winding cores according to claim 15, wherein skiving means
are provided upstream of the feed means to skive the longitudinal edges of the web
being fed thereby allowing the slight overlapping of the web when it is being wrapped
on the core.
17. An apparatus for restoring cores according to claim 15 or claim 16, wherein the means
for moving and extending the web on the elongated frame includes vacuum suction cups
adapted to engage the web from below the web, and conveying means for moving the vacuum
suction cups longitudinally and in a substantially horizontal plane on the elongated
frame, thereby moving the web.
18. An apparatus for restoring winding cores according to claims 15 to 18, wherein the
pickup means includes a travelling overhead beam mounted on the elongated frame, parallel
to the cores in the magazine, a pair of pickup heads adapted to slide longitudinally
of the beam, each pickup head including a spindle assembly including a spindle head
and motor means to drive the spindle head in a rotary movement, whereby when the spindle
heads engage the ends of the core, the spindle heads may be rotated in order to rotate
the core during the wrapping of the web on the core.
19. An apparatus for restoring cores according to claim 18, wherein the travelling beam
has motor means and a gear means for moving the beam laterally of the elongated frame
between the core magazine and a position over the web extending on the elongated frame.
20. An apparatus for restoring winding cores according to any of claims 15 to 19, wherein
slicker means are provided on the elongated frame for engaging an edge of the web
extending on the elongated frame and contacting it with the core on the pickup means.
21. An apparatus for wrapping a layer of material about a cylinder, including an elongated
frame, a web material feeding station at one end of the frame for feeding a predetermined
length of web material substantially horizontally and longitudinally on the frame,
said web having a width equal to the circumference of the cylinder, glue means for
applying adhesive to the web, means for picking up and positioning a cylinder over
the web of material on the elongated frame so that the axis of the cylinder is parallel
to the longitudinal axis of the web of material, means for bringing the web of material
and the cylinder into contact such that the adhesive will engage the surface of the
cylinder, and means for rotating the cylinder so that the web of material is wrapped
completely about the cylinder.
22. An apparatus for wrapping a layer of material about a cylinder according to claim
21, wherein the wrapping means includes an elongated frame, a web unwind means and
web feeder means at one end of the elongated frame, glue bath means associated with
the feeder means for applying glue to the web, means for advancing the web in a horizontal
plane on the frame, cutting means for cutting a length of the web corresponding to
the length of the core, magazine means adjacent the frame for holding cores to be
wrapped, the cores being parallel to the axis of the web on the elongated frame, pickup
means for engaging each core and moving the core over the web extending on the frame,
means to move one of the cores and the web into contact with each other, and means
for rotating the core so that the web is wrapped about the core.
23. An apparatus for wrapping a layer of material about a cylinder according to claim
21 or claim 22, wherein skiving means are provided upstream of the feed means to skive
the longitudinal edges of the web being fed thereby allowing the slight overlapping
of the web when it is being wrapped on the core.
24. An apparatus for wrapping a layer of material about a cylinder according to any of
claims 21 to 23, wherein the means for moving and extending the web on the elongated
frame includes vacuum suction cups adapted to engage the web from below the web, and
conveying means for moving the vacuum suction cups longitudinally and in a substantially
horizontal plane on the elongated frame, thereby moving the web.
25. An apparatus for wrapping a layer of material about a cylinder according to any of
claims 21 to 24, wherein the pickup means includes a travelling overhead beam mounted
on the elongated frame, substantially parallel to the cores in the magazine, a pair
of pickup heads adapted to slide longitudinally of the beam, each pickup head including
a spindle assembly including a spindle head and motor means to drive the spindle head
in a rotary movement, whereby when the spindle heads engage the ends of the core,
the spindle heads may be rotated in order to rotate the core during the wrapping of
the web on the core.
26. An apparatus for wrapping a layer of material about a cylinder according to claim
25, wherein the travelling beam has motor means and a gear means for moving the beam
laterally of the elongated frame between the core magazine and a position over the
web extending on the elongated frame.
27. A winding core for transporting a wound web of paper, comprising a substantially circular
cylindrical tube having ends and a predetermined circumference, the tube having a
first convoluted fiber board substrate and a web of fiber board material having a
length equal to the length of the tube and a width corresponding to the circumference
of the tube, the web of material having skived longitudinal edges, wherein the web
of material, which may be liner board material, is wrapped about the tube and forms
a longitudinal seam made up of the longitudinal skived edges of the web that have
been overlapped.