Image forming apparatus and conveyance malfunction decision...

Details Image forming apparatus and conveyance malfunction decision... Image forming apparatus and conveyance malfunction decision...

2011-06-07

2011-06-07

Yan, Ren (Department: 2854)

Electrophotography

Document handling

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C271S258010

Reexamination Certificate

active

07957687

ABSTRACT:
Preventing a paper jam as much as possible when actual paper size differs from designated paper size with increasing throughput by starting conveyance of a second sheet before detecting the length of a first sheet. Unless a register sensor has detected the rear edge (step S303), start of feeding the next sheet is checked (step S304). If started, a prescribed value1is applied (step S305). If not started, a prescribed value2is applied (step S306). Unless the rear edge is detected before a timer measures “estimated time+prescribed value” (step S307), a paper jam decision is made (step S308). If the rear edge is detected before the timer measures the “estimated time+prescribed value” (step S303), the processing is completed without making a paper jam decision. Making the prescribed value1less than the prescribed value2enables reducing the paper jam caused by incorrect setting.

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JP 9-040217 Machine Translation.

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