Printing – Processes – Condition responsive
Patent
1994-10-21
1995-08-22
Bennett, Chris A.
Printing
Processes
Condition responsive
101219, 101228, 226 11, 226 45, B41F 504
Patent
active
054430089
ABSTRACT:
A system and method for preventing a broken printing web from wrapping about or otherwise fouling the blanket cylinders of printing press units. The system and method includes a web tensioning device located downstream of the printing press units for maintaining tension upon a broken web and pulling the web from the printing press units. The device includes a plurality of web disturbance detectors for detecting a wave, ripple or other disturbance indicative of a web break. A pair of anti-wrap rollers located above and below the web are engaged upon detection of a web break to engage the web between them to exert tension onto the web and pull it from the printing units. The anti-wrap rollers are rotated at a surface speed nominally greater than the surface speed of the printing rolls. The anti-wrap rollers include a plurality of opposed peak and valley portions which enable them to interlock and grip the web along a line of contact.
REFERENCES:
patent: 3152740 (1964-10-01), Kindseth
patent: 4500043 (1985-02-01), Brown
patent: 4508033 (1985-04-01), Fischer
patent: 4549485 (1985-10-01), Nawrath
patent: 4748910 (1988-06-01), Richter
patent: 4846060 (1989-07-01), Proctor
patent: 4909426 (1990-03-01), Crowley et al.
patent: 4961378 (1990-10-01), Balow et al.
patent: 5163371 (1992-11-01), Kotterer
Web Catcher Manual, Rev. A, Item #A71669, Watch Tower Bible and Tract Society of Pennsylvania, Nov. 11, 1992.
Gregory Michael
Lawrence William
Lewandowski Edward
Ozers Guntis
Pavliny Mark
Baldwin Web Controls
Bennett Chris A.
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