Printing apparatus and printing medium feeding method

Details Printing apparatus and printing medium feeding method Printing apparatus and printing medium feeding method

2011-03-29

2011-03-29

Karmis, Stefanos (Department: 3653)

Sheet feeding or delivering

Feeding

Separator and conveyor

C271S270000, C271S010120

Reexamination Certificate

active

07913991

ABSTRACT:
To achieve a high-speed feeder, improvement of a rotational rate is required similarly in a feed motor and a conveyance motor, resulting in high costs. Moreover, in simultaneous control of paper feed and discharge, improvement of a conveyance rate leads to a high discharge rate to deteriorate alignment of discharged paper sheets. To solve the problems, the rate of the feed roller is set higher than the rate of the conveyance roller. The rate of the feed roller is determined based on the rate of the conveyance roller and an allowable amount of a loop formed by a rate difference between the two rollers. In the simultaneous control of paper feed and discharge, a distance between pages is detected by a sensor to determine whether the distance is sufficient, from the relation between current feed and conveyance rates. In the case of insufficient distance, the conveyance roller is stopped.

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