U.S. patent application number 11/034143 was filed with the patent office on 2005-07-28 for process and device for reeling a paper web.
Invention is credited to Schloffer, Robert, Schmidhofer, Rupert, Walcher, Erwin, Weigant, Harald.
Application Number | 20050161551 11/034143 |
Document ID | / |
Family ID | 34624227 |
Filed Date | 2005-07-28 |
United States Patent
Application |
20050161551 |
Kind Code |
A1 |
Schmidhofer, Rupert ; et
al. |
July 28, 2005 |
Process and device for reeling a paper web
Abstract
The invention relates to a process for reeling a paper web,
particularly a tissue web, specifically when starting up the
machine and after a web break. According to the invention, this is
achieved by pressing the paper web tail (8') or the entire width of
the web onto the reel drum (5) and securing it there by means of an
auxiliary roll (9) before it is transferred to the reel spool (3).
The invention also relates to a device for reeling a paper web,
particularly a tissue web, specifically when starting up the
machine and after a web break, using a reel spool (3) and a reel
drum (5). An auxiliary roll (9) is provided in addition to press a
paper web tail (8') or the entire web width onto the reel drum (5)
and secure it there.
Inventors: |
Schmidhofer, Rupert;
(Judendorf-Strassengel, AT) ; Weigant, Harald;
(Graz, AT) ; Walcher, Erwin; (US) ;
Schloffer, Robert; (Graz, AT) |
Correspondence
Address: |
ALIX YALE & RISTAS LLP
750 MAIN STREET
SUITE 1400
HARTFORD
CT
06103
US
|
Family ID: |
34624227 |
Appl. No.: |
11/034143 |
Filed: |
January 12, 2005 |
Current U.S.
Class: |
242/526 |
Current CPC
Class: |
B65H 2301/41816
20130101; B65H 2801/84 20130101; B65H 2408/236 20130101; B65H
19/2261 20130101; B65H 2301/522 20130101 |
Class at
Publication: |
242/526 |
International
Class: |
B65H 019/28 |
Foreign Application Data
Date |
Code |
Application Number |
Jan 13, 2004 |
AT |
A 28/2004 |
Claims
1. Process for reeling a paper web having a main portion of nominal
web width and a front portion of any width up to said nominal
width, onto a reel spool rotating at a machine speed adjacent to a
rotating reel drum, comprising: feeding the front portion onto the
reel drum while the reel spool is spaced from the reel drum;
pressing and holding the front portion against the reel drum
whereby the front portion follows the rotation of and then
separates from the reel drum; while the front portion is pressed
and held against the reel drum, bringing the reel spool up to
machine speed; substantially simultaneously, pressing the reel
spool against the web on the reel drum and severing the web front
portion, thereby exposing a leading edge of the web main portion;
and directing the exposed edge to the reel spool and winding the
web main portion around the reel spool at machine speed.
2. Process according to claim 1, wherein the front portion is a
tail having a free end and a width that increases from less than
half said nominal width at the free end to said nominal width at
the main portion.
3. Process according to claim 1, wherein the front portion is a
continuation of, at the same width as, the main portion.
4. Process according to claim 1, wherein the front portion of the
web upon separation from the reel drum, is directed to a
pulper.
5. Process according to claim 1, wherein an auxiliary roll presses
and holds the front portion of the web against the reel drum.
6. Process according to claim 1, wherein while the main portion is
winding around the spool at machine speed, the auxiliary roll is
retracted from the reel drum.
7. Process according to claim 1, wherein the auxiliary roll is at a
standstill.
8. Process according to claim 1, wherein the auxiliary roll is
operated in creep mode.
9. Process according to claim 1, wherein the auxiliary roll is
accelerated to and then maintained at a target speed.
10. Process according to one of claim 2, wherein the paper web tail
is diverted into a pulper after the reel drum until said
separation.
11. Process according to claim 1, including applying an adhesive to
the reel spool.
12. Process according to claim 1, wherein the full width of the web
is transferred instantly to the reel spool.
13. Device for reeling a paper web onto a reel spool located
downstream of and cooperating with a rotating reel drum, wherein
the improvement comprises an auxiliary roll upstream of the reel
spool for pressing and holding the web against the reel drum.
14. Device according to claim 13, whereby the auxiliary roll is
movable between an active position against the reel drum and a
retracted position spaced from the reel drum.
15. Device according to claim 13, wherein the reel drum has a
rotation axis and four quadrants centered on said axis, and the
auxiliary roll and reel spool are situated at respective adjacent
quadrants.
16. Device according to claim 13, wherein the auxiliary roll is
rotatably drivable at a selected variable speed.
17. Device according to claim 13, including an adhesive application
for the reel spool.
Description
BACKGROUND OF THE INVENTION
[0001] The invention relates to a process for reeling a paper web,
particularly a tissue web, specifically when starting up the
machine and after a web break. In addition, the invention relates
to a device for reeling a paper web, particularly a tissue web,
specifically when starting up the machine and after a web break,
using a reel spool and a reel drum.
[0002] Processes and devices are known in which the tail feed strip
is reeled onto a reel spool or a winding tube, on or to which an
adhesive or an adhesive strip has been applied manually over the
entire web width. An automatic adhesive application device is known
from U.S. Pat. No. 6,253,818. The adhesive can also be applied to
the paper web ahead of the reel spool using spray nozzles. In these
known processes, only a tail strip is wound onto the reel first of
all, thus causing unevenness when the paper web then becomes
broader to extend over the machine width. In addition, air
entrapment may occur, which can cause the web to run off track. Due
to the unevenness over the web width, particularly the equipment
for measuring the web tension and corresponding control device
(winding tightness control) can no longer be used.
SUMMARY OF THE INVENTION
[0003] The aim of the invention is thus to transfer the full web
width onto the reel spool or winding tube when feeding in the web
or after a web break. This method can also reduce the amount of
broke.
[0004] According to the invention, this is achieved by pressing the
paper web tail or the entire width of the web onto the reel drum
and securing it there by means of an auxiliary roll before it is
transferred to the reel spool. In this way, the web tail or the
entire web width can run over the reel drum without the
disadvantages of having to be wound onto the reel spool.
[0005] In one aspect, the invention is directed to a process for
reeling a paper web having a main portion of nominal web width and
a front portion of any width up to the nominal width, onto a reel
spool rotating at a machine speed adjacent to a rotating reel drum.
The steps include feeding the front onto the reel drum while the
reel spool is spaced from the reel drum and pressing and holding
the front portion against the reel drum whereby the front portion
follows the rotation of and then separates from the reel drum.
While the front portion is pressed and held against the reel drum,
the reel spool is brought up to machine speed and substantially
simultaneously, the reel spool is pressed against the web on the
reel drum and the web front portion of the web is severed, thereby
exposing a leading edge of the web main portion. The exposed edge
is directed to the reel spool and the web main portion is wound
around the reel spool at machine speed.
[0006] The front portion can be a tail having a free end and a
width that increases from less than half the nominal width at the
free end to the nominal width at the main portion. Alternatively,
the front portion is a continuation of at the same width as the
main portion.
[0007] An advantageous further development of the invention is
characterized by the auxiliary roll being at a standstill, however
it can also be operated in creep mode or accelerated to and then
operated at production speed. Thus, the paper web tail can be
placed easily over the reel drum when first fed in after a shutdown
and can also be inserted again quickly after a web break.
[0008] A favorable embodiment of the invention is characterized by
the paper web tail being diverted into a pulper after the reel drum
until the web has the required width. This provides a favorable
means of transferring the web in its the entire width.
[0009] A particularly favorable further development of the
invention is characterized by an adhesive being applied to the reel
spool so that the full width of the web can be transferred
instantly to the reel spool. With this step, the entire web can be
wound directly onto the reel spool without unevenness occurring at
the edges.
[0010] The invention also relates to a device for reeling a paper
web, particularly a tissue web, specifically when starting up the
machine and after a web break, using a reel spool and a reel drum.
According to the invention, this device is characterized by an
auxiliary roll being provided in addition to press a paper web tail
or the entire web width onto the reel drum and secure it there.
[0011] If the auxiliary roll has a design that is suitable for
pressing onto the reel drum, the paper web can be secured to the
reel drum particularly well. If the auxiliary roll can be lifted
off the reel drum, this will prevent anything from influencing
normal production operations. If the auxiliary roll has a drive to
accelerate to production speed, transfer of the paper web tail or
the entire web width can be performed particularly favorably until
the web is received on the reel spool.
[0012] If a device is provided for applying adhesive to the reel
spool, the entire web width can be transferred particularly well to
the reel spool without any unevenness over the web width. This
results in a sharp drop in the amount of broke.
BRIEF DESCRIPTION OF THE DRAWINGS
[0013] The invention will now be described in examples and
referring to the drawings, where
[0014] FIG. 1 shows a state-of-the-art reeling device;
[0015] FIG. 2 contains a schematic diagram of the invention feeding
in the web tail;
[0016] FIG. 3 is a schematic diagram of the invention with the web
being transferred to the reel spool; and
[0017] FIG. 4 is a schematic diagram of the invention in continuous
winding operation.
DESCRIPTION OF THE PREFERRED EMBODIMENTS
[0018] FIG. 1 shows the arrangement of a reeling device 1 for a
paper machine, particularly a tissue machine, where the paper is
wound onto a reel 2. The empty reel spool 3 has a rubber covering
or is fitted with a core shaft 3' and brought from a storage area
into position 3" to a reel drum 5 using a lever 4. From there, the
reel spool 3 is swung in direction 6 towards the full reel, where
the paper is cut over the entire width in continuous operation, and
reeling continues immediately onto the empty reel spool 3. This
embodiment has an adhesive applying device 7 mounted above the
storage position for the empty reel 3 to apply adhesive to the
empty core shaft 3'.
[0019] FIG. 2 shows the invention with a front portion 8' such as a
web tail being fed to a reel drum 5. A web guiding device is used
to feed the paper web tail into the space between the reel drum 5
and the auxiliary roll 9, where the auxiliary roll 9 is either at a
standstill, or running at creep or any other desired speed.
Subsequently, the auxiliary roll 9 is pressed onto the reel drum 5
and thus secures the web tail 8. After leaving the reel drum 5, the
web tail 8 is diverted into a pulper (not shown). This is where web
widening begins, i.e. the web tail broadens until it reaches the
full web width. Then it can be cut lengthwise in one or more places
using a slitter. At the same time, an empty reel spool 3 (position
3a) from the reel spool magazine is brought to the reel spool lift
(lever 4) and adhesive 10 is applied to the reel spool 3 (in
position 3b) using an adhesive applying device 7. As an
alternative, an adhesive strip can also be applied over the entire
web width. The reel spool is then placed in the primary arm of the
winder 1 using the reel spool lift.
[0020] FIG. 3 illustrates the status when the entire (main) web
portion 8 is transferred to the reel spool 3. The reel spool 3 is
brought to machine speed in position 3c and then pressed onto the
paper web 8 running over the reel drum 5 in position 3d. At the
same time, the entire web is detached instantly, i.e. within a
fraction of a second, and wound immediately onto the reel spool 3.
It can be appreciated from FIG. 3 the reel drum 5 has a rotation
axis and four quadrants centered on the axis, and that preferably,
the auxiliary roll 9 and the reel spool 3 are situated at
respective adjacent quadrants, with the auxiliary roll upstream of
the reel spool. Since the paper web widens on the reel drum 5 from
the web tail to the full web width during the start-up procedure,
and also after a web break should the situation arise, the web can
also be transferred to the reel spool right away with its full
width and need not be allowed to widen during winding on the reel
spool, as was the case to date, which would lead to the unevenness
and problems described above.
[0021] FIG. 4 shows the situation during continuous winding of the
paper web 8 onto the reel 2, where the auxiliary roll 9 is lifted
off the reel drum 5 here and thus, there are no obstacles for the
paper web.
[0022] The invention is not limited to the variants shown. It can
be used in any paper machine, but does bring advantages in tissue
machines because it is particularly important here to have even web
distribution over the web width and because, due to creping, there
is also a particular risk of air entrapment between the layers of
the paper web on the core shaft, which could thus cause web
displacement. There are various possibilities for transferring the
web to the reel spool, where the embodiment with adhesive and
instant transfer of the entire paper web is particularly
advantageous.
* * * * *