Electrophotographic apparatus and paper detector thereof and pap

Details Electrophotographic apparatus and paper detector thereof and pap Electrophotographic apparatus and paper detector thereof and pap

1996-11-07

1998-04-28

Lee, S.

Electrophotography

Diagnostics

Document handling

27126504, G03G 1500

Patent

active

057458170

ABSTRACT:
An electrophotographic apparatus for transferring a toner image formed on a photosensitive drum onto a sheet of paper and melt-fixing the toner image on the sheet of paper, having a paper detector at a predetermined position in a transporting path of the sheet of paper, the paper detector being composed of a light projector, a reflecting member for reflecting a primary light beam emitted from the light projector and a light receiver for sensing a secondary light beam reflected by the reflecting member, to prevent erroneous detections the light receiver is placed at a position relatively displaced with respect to a position where the light projector is located so that the primary light beam and the secondary light beam have tilting components to both a plane parallel to a transporting plane of the sheet of paper and a plane vertical to the transporting plane.

REFERENCES:
patent: 5189470 (1993-02-01), Matsuda et al.

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