Image forming apparatus

Details Image forming apparatus Image forming apparatus

1998-01-14

1999-01-05

Brase, Sandra

Electrophotography

Diagnostics

Document handling

271227, 399 51, 399367, G03G 1504, G03G 1522

Patent

active

058571302

ABSTRACT:
An image forming apparatus records an image on a recording medium after correcting a slant of the image according to a type of document sheet or an operating history of the image forming apparatus. Normally, a slant of the document sheet is corrected by bringing one edge of the sheet in contact with a document scale provided on a document platform. When the sheet is of thin paper or sheets of different sizes are mixed, an image signal obtained by scanning a document image is electrically processed so as to correct a slant of an image to be recorded. When the image signal is electrically processed so as to correct the slant of the image to be recorded, the correction of image slant may be based also on the operating history of the image forming apparatus, for example, the total number of sheets transported, the number of times a paper jam has occurred or the cumulative value of the slant angle of the image.

REFERENCES:
patent: 4511242 (1985-04-01), Ashbee et al.
patent: 4621801 (1986-11-01), Sanchez
patent: 4971304 (1990-11-01), Lofthus
patent: 5169140 (1992-12-01), Wenthe, Jr.
patent: 5401012 (1995-03-01), Taruki
patent: 5533721 (1996-07-01), Takashimizu
patent: 5568281 (1996-10-01), Kochis et al.

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