Jam prevention mechanism

Details Jam prevention mechanism Jam prevention mechanism

1991-03-05

1993-01-19

Pendegrass, Joan H.

Photocopying

Contact printing

Light boxes

355290, 271311, 271900, G03G 1570

Patent

active

051810760

ABSTRACT:
A jam prevention mechanism is provided, adapted to be positioned in a device including a pair of rollers through which a sheet is to be fed, for preventing the sheet from being caught around one of the pair of rollers. The jam prevention mechanism comprises at least one contact member arranged to be located at the downstream side of the pair of rollers along a sheet feeding direction, and contacted with a circumferential surface of one of the pair of rollers by a predetermined force. The contact member is further arranged so as not to be moved along the sheet feeding direction. Thus, the recording sheet can be prevented from being caught around the roller without an excessive resistance applied against the rotation of the roller, and jamming of the recording sheet can be prevented before it happens.

REFERENCES:
patent: 4423951 (1984-01-01), Rightmyre
patent: 4640600 (1987-02-01), Hirabayashi et al.
patent: 4755848 (1988-07-01), Tamary

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