CA1301137C - Continuously running unwinder - Google Patents
Continuously running unwinderInfo
- Publication number
- CA1301137C CA1301137C CA000517918A CA517918A CA1301137C CA 1301137 C CA1301137 C CA 1301137C CA 000517918 A CA000517918 A CA 000517918A CA 517918 A CA517918 A CA 517918A CA 1301137 C CA1301137 C CA 1301137C
- Authority
- CA
- Canada
- Prior art keywords
- roll
- unwinder
- drum
- reel
- supercalendar
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H19/00—Changing the web roll
- B65H19/10—Changing the web roll in unwinding mechanisms or in connection with unwinding operations
- B65H19/12—Lifting, transporting, or inserting the web roll; Removing empty core
- B65H19/126—Lifting, transporting, or inserting the web roll; Removing empty core with both-ends supporting arrangements
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H2301/00—Handling processes for sheets or webs
- B65H2301/40—Type of handling process
- B65H2301/41—Winding, unwinding
- B65H2301/413—Supporting web roll
- B65H2301/4136—Mounting arrangements not otherwise provided for
- B65H2301/41361—Mounting arrangements not otherwise provided for sequentially used roll supports for the same web roll
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H2301/00—Handling processes for sheets or webs
- B65H2301/40—Type of handling process
- B65H2301/41—Winding, unwinding
- B65H2301/417—Handling or changing web rolls
- B65H2301/4171—Handling web roll
- B65H2301/4173—Handling web roll by central portion, e.g. gripping central portion
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H2301/00—Handling processes for sheets or webs
- B65H2301/40—Type of handling process
- B65H2301/41—Winding, unwinding
- B65H2301/417—Handling or changing web rolls
- B65H2301/4171—Handling web roll
- B65H2301/4173—Handling web roll by central portion, e.g. gripping central portion
- B65H2301/41734—Handling web roll by central portion, e.g. gripping central portion involving rail
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H2301/00—Handling processes for sheets or webs
- B65H2301/40—Type of handling process
- B65H2301/41—Winding, unwinding
- B65H2301/417—Handling or changing web rolls
- B65H2301/418—Changing web roll
- B65H2301/4185—Core or mandrel discharge or removal, also organisation of core removal
- B65H2301/4186—Core or mandrel discharge or removal, also organisation of core removal by lifting or lowering device, e.g. crane
Landscapes
- Replacement Of Web Rolls (AREA)
Abstract
(57) ABSTRACT OF THE DISCLOSURE
This publication describes a continuously running unwinder, for instance, for feeding a paper web from a reel-up drum into a supercalender. The unwinder proper comprises an unwinder unit (1), adapted on a base (11), an unwinder block (3) incorporated in the unwinder unit (1) for synchronizing a fresh reel-up drum (8) with a paper web (12), and a splicing head assembly (9) for splicing a paper web (12) from an expiring reel-up drum (2) by means of an doublesided adhesive tape strip on the surface of a fresh roll on the reel-up drum (8). In accordance with the invention, the expiring reel-up drum (2) can be elevated by lift actuators (4, 6, 7; 10), mounted on the frame of the supercalender (5) at least essentially vertically, from the unwinder block (3) to the unwinder block (3) of the fresh reel-up drum (8) to facilitate reel-up drum transfer and flying splicing.
In accordance with a preferable embodiment, the lift actuators consist of carriages (4), mounted on the frame of the superca-lender (5) and driven by drive actuators (7), gliding along at the essentially vertical mounted guides (6). The unwinder in accordance with the invention consumes less space, especially in the lateral direction, than inventions of prior art.
(Figure 1)
This publication describes a continuously running unwinder, for instance, for feeding a paper web from a reel-up drum into a supercalender. The unwinder proper comprises an unwinder unit (1), adapted on a base (11), an unwinder block (3) incorporated in the unwinder unit (1) for synchronizing a fresh reel-up drum (8) with a paper web (12), and a splicing head assembly (9) for splicing a paper web (12) from an expiring reel-up drum (2) by means of an doublesided adhesive tape strip on the surface of a fresh roll on the reel-up drum (8). In accordance with the invention, the expiring reel-up drum (2) can be elevated by lift actuators (4, 6, 7; 10), mounted on the frame of the supercalender (5) at least essentially vertically, from the unwinder block (3) to the unwinder block (3) of the fresh reel-up drum (8) to facilitate reel-up drum transfer and flying splicing.
In accordance with a preferable embodiment, the lift actuators consist of carriages (4), mounted on the frame of the superca-lender (5) and driven by drive actuators (7), gliding along at the essentially vertical mounted guides (6). The unwinder in accordance with the invention consumes less space, especially in the lateral direction, than inventions of prior art.
(Figure 1)
Description
~31~37 CONTINUOUSLY RUNNING UNWINDER
The present invention relates to a ~ontlnuously running unwinder-supercalendar.
Machines of this type are used, for instance, for feeding a web of paper from a reel-up drum into a supercalendar.
Inventions known in prior art are based on a continuously running unwinder unit, situated as a separate block, which makes the unwinder expensive as well as rather space-consuming especially in the horizontal direction.
The aim of the invention is to overcome the aforementioned drawbacks and to provide flying splicing at the reel-up drum.
Another object of the invention is to provide lift actuators attached to the supercalendar frame, by means of which an expiring reel-up drum can be elevated from an unwinder block. According to one preferred embodiment of the invention, the unwinder comprises an unwinder unit, two carriages, and guides which are mounted to the frame of the supercalendar and along which the carriages move driven by hydraulic cylinder-operated chains. The expiring reel-up drum is elevated by means of the carriages from the unwinder block of the unwinder unit, and a new reel-up drum with a fresh roll is rolled into the unwinder block. The speed of the fresh roll is synchronized with the speed of the web before the web is pressed against a double-sided adhesive tape strip on the surface of the fresh roll. The expiring web is severed and the empty reel-up drum is stopped.
More specifically, the invention provides a continuously running unwinder-supercalendar apparatus comprising: an unwinder unit including: a base; guide rails mounted on said base for supporting a first roll mounted on a first reel-up drum, said guide rails having a roll loading end and a roll delivery end; an unwinder block positioned adjacent said delivery end of said guide rails and mounted on said base; means for transferring a roll from said roll loading end to said roll delivery end of said guide rails; and means for B
~3~
drivlng said first roli mounted on said unwinder block and synchronizing the peripheral speed of said first roll with the speed of a web unwinding from an expiring second roll mounted on a second reel-up drum which is supported by the unwinder-supercalendar apparatus; a supercalendar unit positionedadjacent said unwinder unit at said unwlnder block, said supercalendar unit including: a supercalendar unit frame; lift actuator means mounted on said supercalendar unit frame for lifting the expiring roll mounted on said second reel-up drum substantially vertically from said unwinder block; and means for splicing the web of said first roll with the web unwinding from said explring second roll.
An advantage of the invention is a reduction of the space needed. The continuously running unwinder in accordance with the present invention can be located even in confined spaces. Savings in construction material, too, are appreciable as compared to conventional unwinders, hecause the frame of the lift actuators is part of the supercalendar itself. The construction in accordance with the invention holds the splicing head assembly always perpendicular to the surface of the reel-up drum irrespective of the reel-up drum diameter, consequently disposing with a conventional expensive splicing roller of large dimensions to obtain a satisfactory splice.
Embodiments of the invention will now be described in accordance with the attached drawings.
Figure 1 shows a partially diagrammatic side view of a continuously running unwinder before severing the web and splicing with a fresh roll.
~igure 2 shows the unwinder of Figure 1 in a front view and partially in phantom.
Figure 3 shows unwinder of Figure 1 in a top view and partially in phantom.
Figure 4 shows in a side view of another embodiment in accordance with the invention.
The unwinder-supercalendar apparatus of the present invention comprises an unwinder unit 1 as shown in Figure 1.
, ~
.
~:~0~3~
The unwinder unit includes a base 11 supporting guide rails 13 and unwinder block 3. A lever 14 is actuated for moving a roll 20 mounted on reel-up drum 8 from a roll load position on rails 13 to a roll delivery position at whlch is located the S unwinder block 3. A conventional roll drive and synchronizing means synchronizes the peripheral speed of a fresh roll mounted on the unwinder block 3 with the speed of the web of expiring roll 21 for splicing the free end 25 of fresh roll 20 when it is mounted on unwinder block 3. The supercalendar unit 5 is positioned adjacent the unwinder unit 1. Carriages 4 adapted to lift up reel-up drum 2 on which expiring roll 21 is mounted are movably mounted on guides 22 (Figure 3) of frame 23 of supercalendar unit 5. The carriages are moved by hydraulic cylinders 24 as shown in Figure 2. Figure 4 shows another embodiment of the present invention having plvoted levers 10 actuated by hydraulic cylinders 15 for lifting the expiring roll 21. Both of the embodiments shown in Figures 1 and 2 include a splicing means having a brush 9 for pressing the web unwinding from expiring roll 21 into engagement with the surface of fresh roll 20 which has previously been provided with a double-sided adhesive strip for accomplishing splicing of the rolls. The brush in the embodiment of Figure 1 is mounted to the frame of the supercalendar unit 5 and to the pivoted levers 10 in the embodiment shown in Figure 2.
The unwinder in accordance with Figures 1-3 operates as follows: A paper web 12 is fed from an unwinding roll on reel-up drum 2 via several hard rolls 16 and soft rolls 17 of the supercalendar 5 ~o a rewinder (not shown). While the unwinding roll is expiring on reel-up drum 2, supported by carriages 4, a fresh roll on reel-up drum 8 is rolled with a lever 14 along rails 13 into an unwinder block 3, provided in a base ll under the expiring reel-up drum and situated in the unwinder unit l. The speed of the fresh roll on reel-up drum 8 is synchronized with the paper web 12, which web 12 is then pressed against a double-sided adhesive tape strip on the surface of the fresh roll by a brush of a splicing head assembly 9. The expiring web is severed and the empty reel-~31D~13~
up drum 2 is stopped and lifted away. During the unwinding ofthe fresh roll, its reel-up drum 8 is elevated by hydraulic cylinder-operated chains 7 acting on and moving carriages 4 along vertical guides 6, mounted on the frame of the supercalendar 5, upwardly in order to provicle space for the next fresh roll.
The elevation of the reel-up drum of the expiring roll can also be performed using a screw jack or, in accordance with Figure 4, by pivoted levers lO and hydraulic cylinders 15 mounted on the frame of the supercalendar 5.
.~
The present invention relates to a ~ontlnuously running unwinder-supercalendar.
Machines of this type are used, for instance, for feeding a web of paper from a reel-up drum into a supercalendar.
Inventions known in prior art are based on a continuously running unwinder unit, situated as a separate block, which makes the unwinder expensive as well as rather space-consuming especially in the horizontal direction.
The aim of the invention is to overcome the aforementioned drawbacks and to provide flying splicing at the reel-up drum.
Another object of the invention is to provide lift actuators attached to the supercalendar frame, by means of which an expiring reel-up drum can be elevated from an unwinder block. According to one preferred embodiment of the invention, the unwinder comprises an unwinder unit, two carriages, and guides which are mounted to the frame of the supercalendar and along which the carriages move driven by hydraulic cylinder-operated chains. The expiring reel-up drum is elevated by means of the carriages from the unwinder block of the unwinder unit, and a new reel-up drum with a fresh roll is rolled into the unwinder block. The speed of the fresh roll is synchronized with the speed of the web before the web is pressed against a double-sided adhesive tape strip on the surface of the fresh roll. The expiring web is severed and the empty reel-up drum is stopped.
More specifically, the invention provides a continuously running unwinder-supercalendar apparatus comprising: an unwinder unit including: a base; guide rails mounted on said base for supporting a first roll mounted on a first reel-up drum, said guide rails having a roll loading end and a roll delivery end; an unwinder block positioned adjacent said delivery end of said guide rails and mounted on said base; means for transferring a roll from said roll loading end to said roll delivery end of said guide rails; and means for B
~3~
drivlng said first roli mounted on said unwinder block and synchronizing the peripheral speed of said first roll with the speed of a web unwinding from an expiring second roll mounted on a second reel-up drum which is supported by the unwinder-supercalendar apparatus; a supercalendar unit positionedadjacent said unwinder unit at said unwlnder block, said supercalendar unit including: a supercalendar unit frame; lift actuator means mounted on said supercalendar unit frame for lifting the expiring roll mounted on said second reel-up drum substantially vertically from said unwinder block; and means for splicing the web of said first roll with the web unwinding from said explring second roll.
An advantage of the invention is a reduction of the space needed. The continuously running unwinder in accordance with the present invention can be located even in confined spaces. Savings in construction material, too, are appreciable as compared to conventional unwinders, hecause the frame of the lift actuators is part of the supercalendar itself. The construction in accordance with the invention holds the splicing head assembly always perpendicular to the surface of the reel-up drum irrespective of the reel-up drum diameter, consequently disposing with a conventional expensive splicing roller of large dimensions to obtain a satisfactory splice.
Embodiments of the invention will now be described in accordance with the attached drawings.
Figure 1 shows a partially diagrammatic side view of a continuously running unwinder before severing the web and splicing with a fresh roll.
~igure 2 shows the unwinder of Figure 1 in a front view and partially in phantom.
Figure 3 shows unwinder of Figure 1 in a top view and partially in phantom.
Figure 4 shows in a side view of another embodiment in accordance with the invention.
The unwinder-supercalendar apparatus of the present invention comprises an unwinder unit 1 as shown in Figure 1.
, ~
.
~:~0~3~
The unwinder unit includes a base 11 supporting guide rails 13 and unwinder block 3. A lever 14 is actuated for moving a roll 20 mounted on reel-up drum 8 from a roll load position on rails 13 to a roll delivery position at whlch is located the S unwinder block 3. A conventional roll drive and synchronizing means synchronizes the peripheral speed of a fresh roll mounted on the unwinder block 3 with the speed of the web of expiring roll 21 for splicing the free end 25 of fresh roll 20 when it is mounted on unwinder block 3. The supercalendar unit 5 is positioned adjacent the unwinder unit 1. Carriages 4 adapted to lift up reel-up drum 2 on which expiring roll 21 is mounted are movably mounted on guides 22 (Figure 3) of frame 23 of supercalendar unit 5. The carriages are moved by hydraulic cylinders 24 as shown in Figure 2. Figure 4 shows another embodiment of the present invention having plvoted levers 10 actuated by hydraulic cylinders 15 for lifting the expiring roll 21. Both of the embodiments shown in Figures 1 and 2 include a splicing means having a brush 9 for pressing the web unwinding from expiring roll 21 into engagement with the surface of fresh roll 20 which has previously been provided with a double-sided adhesive strip for accomplishing splicing of the rolls. The brush in the embodiment of Figure 1 is mounted to the frame of the supercalendar unit 5 and to the pivoted levers 10 in the embodiment shown in Figure 2.
The unwinder in accordance with Figures 1-3 operates as follows: A paper web 12 is fed from an unwinding roll on reel-up drum 2 via several hard rolls 16 and soft rolls 17 of the supercalendar 5 ~o a rewinder (not shown). While the unwinding roll is expiring on reel-up drum 2, supported by carriages 4, a fresh roll on reel-up drum 8 is rolled with a lever 14 along rails 13 into an unwinder block 3, provided in a base ll under the expiring reel-up drum and situated in the unwinder unit l. The speed of the fresh roll on reel-up drum 8 is synchronized with the paper web 12, which web 12 is then pressed against a double-sided adhesive tape strip on the surface of the fresh roll by a brush of a splicing head assembly 9. The expiring web is severed and the empty reel-~31D~13~
up drum 2 is stopped and lifted away. During the unwinding ofthe fresh roll, its reel-up drum 8 is elevated by hydraulic cylinder-operated chains 7 acting on and moving carriages 4 along vertical guides 6, mounted on the frame of the supercalendar 5, upwardly in order to provicle space for the next fresh roll.
The elevation of the reel-up drum of the expiring roll can also be performed using a screw jack or, in accordance with Figure 4, by pivoted levers lO and hydraulic cylinders 15 mounted on the frame of the supercalendar 5.
.~
Claims (6)
1. A continuously running unwinder-supercalendar apparatus comprising:
an unwinder unit including:
a base;
guide rails mounted on said base for supporting a first roll mounted on a first reel-up drum, said guide rails having a roll loading end and a roll delivery end;
an unwinder block positioned adjacent said delivery end of said guide rails and mounted on said base;
means for transferring a roll from said roll loading end to said roll delivery end of said guide rails; and means for driving said first roll mounted on said unwinder block and synchronizing the peripheral speed of said first roll with the speed of a web unwinding from an expiring second roll mounted on a second reel-up drum which is supported by the unwinder-supercalendar apparatus;
a supercalendar unit positioned adjacent said unwinder unit at said unwinder block, said supercalendar unit including:
a supercalendar unit frame;
lift actuator means mounted on said supercalendar unit frame for lifting the expiring roll mounted on said second reel-up drum substantially vertically from said unwinder block; and means for splicing the web of said first roll with the web unwinding from said expiring second roll.
an unwinder unit including:
a base;
guide rails mounted on said base for supporting a first roll mounted on a first reel-up drum, said guide rails having a roll loading end and a roll delivery end;
an unwinder block positioned adjacent said delivery end of said guide rails and mounted on said base;
means for transferring a roll from said roll loading end to said roll delivery end of said guide rails; and means for driving said first roll mounted on said unwinder block and synchronizing the peripheral speed of said first roll with the speed of a web unwinding from an expiring second roll mounted on a second reel-up drum which is supported by the unwinder-supercalendar apparatus;
a supercalendar unit positioned adjacent said unwinder unit at said unwinder block, said supercalendar unit including:
a supercalendar unit frame;
lift actuator means mounted on said supercalendar unit frame for lifting the expiring roll mounted on said second reel-up drum substantially vertically from said unwinder block; and means for splicing the web of said first roll with the web unwinding from said expiring second roll.
2. The apparatus according to claim 1, wherein said lift actuator means comprises carriages movable mounted on guides of said supercalendar unit frame and actuators for moving said carriages substantially vertically and engaging said second reel-up drum for lifting said expiring second roll.
3. The apparatus according to claim 1, wherein said lift actuator means comprises levers pivotably mounted to said supercalendar unit frame and actuated by hydraulic cylinders.
4. The apparatus according to claim 1, wherein said means for transferring a roll comprises a lever pivotably mounted on said base and acting on said first reel-up drum.
5. The apparatus according to claim 1, wherein said means for splicing the web comprises a brush mounted on said supercalendar unit frame for pressing the web of said expiring second roll into engagement with the surface of said second roll that has been previously provided with a double-sided adhesive tape strip, whereby said first roll is spliced for said second roll.
6. The apparatus according to claim 3, wherein said means for splicing the web comprises a brush mounted on said levers for pressing the web of said expiring second roll into engagement with the surface of said second roll that has previously been provided with a double-sided adhesive strip, whereby said first roll is spliced for said second roll.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FI853552A FI74678C (en) | 1985-09-17 | 1985-09-17 | CONTAINER UPPRULLNINGSANORDNING. |
| FI853552 | 1985-09-17 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1301137C true CA1301137C (en) | 1992-05-19 |
Family
ID=8521358
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000517918A Expired - Fee Related CA1301137C (en) | 1985-09-17 | 1986-09-10 | Continuously running unwinder |
Country Status (6)
| Country | Link |
|---|---|
| AT (1) | AT396581B (en) |
| CA (1) | CA1301137C (en) |
| DE (1) | DE3630745A1 (en) |
| FI (1) | FI74678C (en) |
| FR (1) | FR2587313B1 (en) |
| SE (1) | SE467971B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US12017877B2 (en) | 2021-06-15 | 2024-06-25 | Valmet Technologies Oy | Method and a device for joining ends of fiber webs in a parent roll change of an unwinder |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6820837B2 (en) | 2002-12-20 | 2004-11-23 | Kimberly-Clark Worldwide, Inc. | Unwind system with flying-splice roll changing |
| FI118894B (en) | 2006-03-20 | 2008-04-30 | Metso Paper Inc | Procedure in connection with a roller cutting machine |
| FI129673B (en) | 2021-06-15 | 2022-06-30 | Valmet Technologies Oy | A method and a device for joining ends of fiber webs in a parent roll change of an unwinder |
Family Cites Families (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE668530C (en) * | 1932-09-27 | 1938-12-06 | Otto R Trampusch | Device for driving and automatic replacement of the paper rolls stored in a roll frame for rotary printing machines |
| US2005037A (en) * | 1934-04-19 | 1935-06-18 | Company The Fidelity Trust | Paper web connecting mechanism for printing presses |
| US3065923A (en) * | 1959-01-07 | 1962-11-27 | Beloit Eastern Corp | Flying splice unwind stand |
| US3189293A (en) * | 1962-04-30 | 1965-06-15 | Beloit Eastern Corp | Radial flying splice mechanism |
| US3163375A (en) * | 1962-09-24 | 1964-12-29 | Kimberly Clark Co | Unwind assembly for a papermaking machine |
| FR1405355A (en) * | 1964-05-27 | 1965-07-09 | Method and device for connecting a replacement strip wound on a reel to another strip during unwinding | |
| US3327959A (en) * | 1964-10-06 | 1967-06-27 | Kimberly Clark Co | Papermaking machine |
| DE1254451B (en) * | 1965-09-21 | 1967-11-16 | Kleinewefers Soehne J | Device for quickly changing spools from the unwinding to the winding device of a web of material |
| US3679524A (en) * | 1969-07-18 | 1972-07-25 | Rice Barton Corp | Splicing webs |
| US4191341A (en) * | 1979-04-03 | 1980-03-04 | Gottlieb Looser | Winding apparatus and method |
| DE3216399A1 (en) * | 1982-05-03 | 1983-11-10 | Edelmann Maschinenfabrik GmbH + Co KG, 8750 Aschaffenburg | DEVICE FOR REPLACING A WINDING CORE Wrapped With Wrapped Material |
-
1985
- 1985-09-17 FI FI853552A patent/FI74678C/en not_active IP Right Cessation
-
1986
- 1986-09-05 SE SE8603723A patent/SE467971B/en not_active Application Discontinuation
- 1986-09-10 DE DE19863630745 patent/DE3630745A1/en not_active Withdrawn
- 1986-09-10 CA CA000517918A patent/CA1301137C/en not_active Expired - Fee Related
- 1986-09-12 FR FR8612778A patent/FR2587313B1/en not_active Expired - Fee Related
- 1986-09-17 AT AT248586A patent/AT396581B/en active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US12017877B2 (en) | 2021-06-15 | 2024-06-25 | Valmet Technologies Oy | Method and a device for joining ends of fiber webs in a parent roll change of an unwinder |
Also Published As
| Publication number | Publication date |
|---|---|
| FI74678B (en) | 1987-11-30 |
| FR2587313A1 (en) | 1987-03-20 |
| FI853552L (en) | 1987-03-18 |
| SE8603723D0 (en) | 1986-09-05 |
| ATA248586A (en) | 1993-02-15 |
| FI74678C (en) | 1988-03-10 |
| DE3630745A1 (en) | 1987-03-26 |
| SE8603723L (en) | 1987-03-18 |
| SE467971B (en) | 1992-10-12 |
| FI853552A0 (en) | 1985-09-17 |
| FR2587313B1 (en) | 1993-11-12 |
| AT396581B (en) | 1993-10-25 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKLA | Lapsed |