EP0341970A3 - Sheet curls reformer - Google Patents

Sheet curls reformer Download PDF

Info

Publication number
EP0341970A3
EP0341970A3 EP19890304666 EP89304666A EP0341970A3 EP 0341970 A3 EP0341970 A3 EP 0341970A3 EP 19890304666 EP19890304666 EP 19890304666 EP 89304666 A EP89304666 A EP 89304666A EP 0341970 A3 EP0341970 A3 EP 0341970A3
Authority
EP
European Patent Office
Prior art keywords
wrap angle
sheet
winding roll
curls
straightening
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.)
Withdrawn
Application number
EP19890304666
Other languages
German (de)
French (fr)
Other versions
EP0341970A2 (en
Inventor
Akira Sakurabayashi
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Kobayashi Engineering Works Ltd
Original Assignee
Kobayashi Engineering Works Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Kobayashi Engineering Works Ltd filed Critical Kobayashi Engineering Works Ltd
Publication of EP0341970A2 publication Critical patent/EP0341970A2/en
Publication of EP0341970A3 publication Critical patent/EP0341970A3/en
Withdrawn legal-status Critical Current

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
    • B65H23/00—Registering, tensioning, smoothing or guiding webs
    • B65H23/04—Registering, tensioning, smoothing or guiding webs longitudinally
    • B65H23/34—Apparatus for taking-out curl from webs

Abstract

The present invention provides an apparatus (13) for straightening sheet curls in which a wrap angle ϑ is provided for a sheet (20) wound off from a winding roll (19) by applying a decurler bar (31) to the sheet (20) between two backup rolls (32), the apparatus (13) comprising a wrap angle adjusting device (34) for adjusting the wrap angle (ϑ) of the sheet (20) by relatively displacing the backup rolls (32) and the decurler bar (31), and a controller (16) which serves to calculate an optimum wrap angle (ϑ) in accordance with changes in the diameter of the winding roll (19) using the logical equation: ϑ = A/Dq + B (wherein A, B, q are constants which are previously determined) from which the optimum wrap angle ϑ can be calculated for the diameter D of the winding roll (19), and to control the wrap angle adjusting device (34) on the basis of the results of this calculation. In consequence, the present invention is able to realize automatization of straightening of curls with a simple configuration and in a rapid and highly precise manner.
EP19890304666 1988-05-10 1989-05-09 Sheet curls reformer Withdrawn EP0341970A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP63111655A JPH0688710B2 (en) 1988-05-10 1988-05-10 Sheet curl straightening device
JP111655/88 1988-05-10

Publications (2)

Publication Number Publication Date
EP0341970A2 EP0341970A2 (en) 1989-11-15
EP0341970A3 true EP0341970A3 (en) 1991-02-06

Family

ID=14566830

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19890304666 Withdrawn EP0341970A3 (en) 1988-05-10 1989-05-09 Sheet curls reformer

Country Status (2)

Country Link
EP (1) EP0341970A3 (en)
JP (1) JPH0688710B2 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102009022248B4 (en) 2009-05-20 2019-04-25 Bw Papersystems Hamburg Gmbh Entwölbungsvorrichtung for Entwölbung a web, especially in a plant of the paper processing industry
JP6287680B2 (en) * 2014-08-12 2018-03-07 スター精密株式会社 Paper transport mechanism
CN105731155B (en) * 2016-04-15 2017-05-10 雅高机械（太仓）有限公司 Paper reverse-curling device and paper cutting machine

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1134992A (en) * 1966-03-24 1968-11-27 Jagenberg Werke Ag Device for flattening travelling webs of paper, card or the like
CH623285A5 (en) * 1978-06-21 1981-05-29 Bobst Fils Sa J Method for acting on the fibres of a material in the form of a moving web and device for implementing the method
US4322802A (en) * 1980-04-10 1982-03-30 Lewis Jr Clarence A Control apparatus for adjusting the position of a workpiece
EP0062025A1 (en) * 1981-03-26 1982-10-06 VOEST-ALPINE Aktiengesellschaft Device for winding straightened steel strips

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5215462A (en) * 1975-07-28 1977-02-05 Kobe Steel Ltd Method of controlling metal strip being coiled
JPS6048427B2 (en) * 1980-09-30 1985-10-26 神崎製紙株式会社 Automatic sheet curl straightening device
JPS6048427A (en) * 1983-08-24 1985-03-16 Hitachi Ltd Air conditioning device

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1134992A (en) * 1966-03-24 1968-11-27 Jagenberg Werke Ag Device for flattening travelling webs of paper, card or the like
CH623285A5 (en) * 1978-06-21 1981-05-29 Bobst Fils Sa J Method for acting on the fibres of a material in the form of a moving web and device for implementing the method
US4322802A (en) * 1980-04-10 1982-03-30 Lewis Jr Clarence A Control apparatus for adjusting the position of a workpiece
EP0062025A1 (en) * 1981-03-26 1982-10-06 VOEST-ALPINE Aktiengesellschaft Device for winding straightened steel strips

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 6, no. 138 (M-145)(1016) 27 July 1982, & JP-A-57 62141 (KANZAKI SEISHI K.K.) 15 April 1982, *

Also Published As

Publication number Publication date
JPH01285556A (en) 1989-11-16
JPH0688710B2 (en) 1994-11-09
EP0341970A2 (en) 1989-11-15

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