Image forming apparatus to form images onto a sheet a plurality

Details Image forming apparatus to form images onto a sheet a plurality Image forming apparatus to form images onto a sheet a plurality

1994-02-07

1996-01-30

Smith, Matthew S.

Photocopying

Contact printing

Light boxes

371 315, 371 316, 371 318, 371186, 371242, 371301, 355200, 355308, 355321, G03G 1500

Patent

active

054884632

ABSTRACT:
An apparatus for forming an image onto a transfer sheet a plurality of times includes an image forming unit for forming an image onto a sheet which is conveyed; first and second conveying units for conveying the sheet from the image forming unit to the image forming unit, wherein the second conveying unit stops the first sheet conveyed by the first conveying unit at a predetermined position and, after the second sheet which is conveyed subsequently to the first sheet conveyed by the first conveying unit was conveyed to a predetermined position on the first sheet, the second conveying unit conveys the first and second sheets in a partially overlapped state and separates the first sheet and supplies the separated first sheet to the image forming unit; and a sheet detecting sensor for detecting the front edge of the sheet which is conveyed by the first conveying unit. After the first sheet was conveyed by the first conveying unit by a first predetermined amount after the front edge of the first sheet had been detected by the sensor, the second conveying unit conveys the first sheet conveyed by the first conveying unit and stops the first sheet at the predetermined position, and after the second sheet was conveyed by the first conveying unit by a second predetermined amount different from the first predetermined amount after the front edge of the second sheet had been detected by the sensor, the second conveying unit conveys the first and second sheets.

REFERENCES:
patent: 5090674 (1992-02-01), Ozawa
patent: 5246224 (1993-09-01), Matsuno et al.
patent: 5305995 (1994-04-01), Nakajima et al.

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