Web fed printing machine having pasting-related misregistration eliminating apparatus
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United States of America Patent
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Sep 6, 2005
Grant Date -
Apr 7, 2005
app pub date -
May 12, 2004
filing date -
Oct 3, 2003
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A web fed printing machine includes a web path provided between two sequentially disposed printing units and a misregistration detector for detecting misregistration in superimposition printing performed by the printing units. During superimposition printing, cylinder fine-move mechanisms finely move corresponding plate cylinders based on detected misregistration in order to adjust the registration. A web path length modification mechanism is provided in the web path. A control unit is connected to the web path length modification mechanism, the misregistration detector, and a paster. When a pasting signal is generated, the plate cylinder fine-move mechanisms stop making registration adjustment. At predetermined timing, the misregistration detector detects misregistration in printing performed by the printing units. The web path length modification mechanism performs a misregistration elimination action based on detected misregistration. Subsequently, the plate cylinder fine-move mechanisms resume making registration adjustment, and the web path length modification mechanism performs a return action.
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