Image forming apparatus having automatic duplex device

Details Image forming apparatus having automatic duplex device Image forming apparatus having automatic duplex device

1996-09-30

1998-05-26

Smith, Matthew S.

Electrophotography

Document handling

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399 18, 399410, 271188, 270 5808, G03G 1500

Patent

active

057582513

ABSTRACT:
An image forming apparatus includes an image carrier for forming an image thereon; a sheet feeding device for feeding a recording sheet to the image carrier to transfer the image onto the recording sheet; a reversing device for reversing the recording sheet on one side of which the image has been transferred and then which has been fixed, at a conveyance path in the reversing device and for feeding the recording sheet onto the image carrier to form another image on a rear side of the recording sheet; a detection device provided between the conveyance path and the image carrier for optically detecting an amount of skew or an mount of shift of the recording sheet. The apparatus further includes controller for judging the amount of skew or the amount of shift to be malfunctional when the amount of skew or the amount of shift exceeds a predetermined value, and for modifying image forming conditions thereafter.

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patent: 5260757 (1993-11-01), Frank et al.
patent: 5355206 (1994-10-01), Maruyama et al.
patent: 5543909 (1996-08-01), Quesnel

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