Image forming apparatus

Details Image forming apparatus Image forming apparatus

2005-05-03

2005-05-03

Hirshfeld, Andrew H. (Department: 2854)

Electrophotography

Document handling

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C399S395000, C400S642000, C400S579000, C400S632000, C271S227000, C271S242000

Reexamination Certificate

active

06889031

ABSTRACT:
An image forming apparatus in that a sheet having an image formed on a first side thereof by an image forming portion is again transported to the image forming portion so that an image may be formed on an opposite or second side of the sheet, the image forming apparatus including a sheet feeding portion, a re-transport path, a pair of registration rollers provided upstream of the image forming portion, and a loop forming space provided upstream of the pair of registration rollers so as to form the loop, wherein an entrance to the loop forming space for the sheet having passed along the re-transport path is formed downstream of an entrance to the loop forming space for the sheet fed from the sheet feeding portion.

REFERENCES:
patent: 5757407 (1998-05-01), Rezanka
patent: 5904350 (1999-05-01), Creighton et al.
patent: 6585439 (2003-07-01), Johnson et al.
patent: 6805347 (2004-10-01), Kuramoto
patent: 20040174552 (2004-09-01), Miyake et al.
patent: 2001305914 (2001-11-01), None

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