发明名称 |
ANTI-WRAP DEVICE FOR A WEB PRESS |
摘要 |
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 bleak. 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.
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申请公布号 |
CA2103175(C) |
申请公布日期 |
2002.04.16 |
申请号 |
CA19932103175 |
申请日期 |
1993.11.16 |
申请人 |
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发明人 |
PAVLINY, MARK;LEWANDOWSKI, EDWARD;LAWRENCE, WILLIAM;GREGORY, MICHAEL;OZERS, GUNTIS |
分类号 |
B41F33/00;B41F33/06;B41F33/18;B65H23/192;B65H26/02;B65H43/04;(IPC1-7):B41F21/00 |
主分类号 |
B41F33/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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