EP 0224731 A3 19890712 - APPARATUS FOR CUTTING LENGHTS OF A WEB BY USING MARKS PRINTED ON THE WEB
Title (en)
APPARATUS FOR CUTTING LENGHTS OF A WEB BY USING MARKS PRINTED ON THE WEB
Publication
Application
Priority
DE 3542923 A 19851204
Abstract (en)
[origin: US4781090A] Apparatus for severing sections from a web by transverse severing cuts at locations related to printed marks on the web. The apparatus includes a rotary cutter and pair of feed rollers, a differential transmission by which the feed rollers are operatively connected to a common drive motor for driving the rotary cutter and the feed rolls. A servomotor is provided for imparting a correcting rotation to the transmission. A mark detector for detecting the printed marks, a sensor for detecting the position of the rotary cutter, and a controller for controlling the servomotor in dependence on the deviation of the spacing of the printed marks from the predetermined web section length are also provided. The servomotor is a stepping motor which receives stepping pulses in a number which represents the difference between the theoretical length of each web section and the actual distance between the printed marks.
IPC 1-7
IPC 8 full level
B26D 5/30 (2006.01); B26D 5/32 (2006.01); B26D 5/34 (2006.01); D06H 7/02 (2006.01)
CPC (source: EP US)
B26D 5/32 (2013.01 - EP US); B26D 5/34 (2013.01 - EP US); Y10T 83/148 (2015.04 - EP US); Y10T 83/159 (2015.04 - EP US); Y10T 83/474 (2015.04 - EP US); Y10T 83/533 (2015.04 - EP US); Y10T 83/543 (2015.04 - EP US)
Citation (search report)
- [X] EP 0074165 A1 19830316 - TREBOR LIMITED [GB]
- [X] US 3774016 A 19731120 - STERNS R, et al
- [X] EP 0011595 A1 19800528 - SAPAL PLIEUSES AUTOMATIQUES [CH]
- [A] DE 3200345 A1 19830120 - OBERLAUSITZER TEXTILBETRIEBE N [DD]
- [A] US 3820429 A 19740628 - HARRIS R
- [AD] DE 2002445 A1 19710729 - HOELLER GMBH GEB
- [A] FR 2301342 A1 19760917 - STRACHAN & HENSHAW LTD [GB]
Designated contracting state (EPC)
AT FR GB IT
DOCDB simple family (publication)
EP 0224731 A2 19870610; EP 0224731 A3 19890712; BR 8605932 A 19870915; CA 1281634 C 19910319; CN 1008251 B 19900606; CN 86108492 A 19871014; DE 3542923 A1 19870611; DE 3542923 C2 19880407; DK 582686 A 19870605; DK 582686 D0 19861203; JP H0825156 B2 19960313; JP S62136397 A 19870619; RU 1802836 C 19930315; US 4781090 A 19881101
DOCDB simple family (application)
EP 86115218 A 19861103; BR 8605932 A 19861203; CA 524472 A 19861203; CN 86108492 A 19861204; DE 3542923 A 19851204; DK 582686 A 19861203; JP 28972586 A 19861204; SU 4028593 A 19861203; US 93669286 A 19861202