Transfer drum having a low-reflectivity area

Details Transfer drum having a low-reflectivity area Transfer drum having a low-reflectivity area

1995-12-15

1997-08-19

Pendegrass, Dan H.

Electrophotography

Diagnostics

Document handling

399 31, 399303, G03G 1500, G03G 1501

Patent

active

056598360

ABSTRACT:
A predetermined sheet retaining plane C for absorbing a record sheet is provided in the circumferential surface of a sheet carrier, and a low-reflectivity area which is to be partially covered with the record sheet is provided at a leading portion of the sheet retaining plane C. Reflection photosensors for detecting the reflectivity of the sheet carrier including the low-reflectivity area are disposed around the sheet carrier. Whether a record sheet is held in the sheet retaining plane C is judged on the basis of detection signals of the photosensors.

REFERENCES:
patent: 5339136 (1994-08-01), Parsons et al.

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