EP 0092659 B1 19860507 - WEB CATCHING DEVICE
Title (en)
WEB CATCHING DEVICE
Publication
Application
Priority
DE 3215473 A 19820424
Abstract (en)
[origin: US4549485A] To prevent damage to a printing cylinder, typically the blanket cylinder of rotary offset printing machine, upon tearing of a paper web, which usually occurs within a dryer, a paper web seizing apparatus is positioned downstream of the last printing station. The apparatus includes a roller (15) which is driven at the speed somewhat higher than the linear speed of the paper web by a belt drive (20,21,22) from a friction wheel (18) and held out-of-engagement with the other roller (3) of the pair by a latching mechanism (24, 25, 26-FIG. 2). Upon sensing of a tear, the electromagnetic (26) of the latching mechanism permits a spring (23) to disengage the first roller (15) from the friction drive (18), the roller continuing to rotate due to inertia and engaging the web (A) and then being driven by the positive drive (8,9,10) of the first roller, thus wrapping any torn web about the first roller and preventing damage to the printing cylinders of the printing machine.
IPC 1-7
IPC 8 full level
B41F 13/02 (2006.01); B41F 33/00 (2006.01); B41F 33/18 (2006.01); B65H 23/14 (2006.01)
CPC (source: EP US)
B41F 33/18 (2013.01 - EP US); B41P 2233/20 (2013.01 - EP US)
Designated contracting state (EPC)
CH DE FR GB LI SE
DOCDB simple family (publication)
EP 0092659 A1 19831102; EP 0092659 B1 19860507; DE 3215473 A1 19831103; DE 3215473 C2 19850307; DE 3363351 D1 19860612; JP H0311901 B2 19910219; JP S58191164 A 19831108; US 4549485 A 19851029
DOCDB simple family (application)
EP 83101898 A 19830226; DE 3215473 A 19820424; DE 3363351 T 19830226; JP 6713983 A 19830418; US 47807183 A 19830323