Electrophotography – Diagnostics – Document handling
Patent
1997-12-10
1999-07-06
Pendegrass, Joan
Electrophotography
Diagnostics
Document handling
399309, 395116, G03G 1500
Patent
active
059207442
ABSTRACT:
An apparatus for forming images on at least one surface of a sheet includes a reader for reading image information on documents, a memory for storing image signals output by the reader, and an image forming unit for selectively forming one of: (i) two page toner images corresponding to the image signals of two pages of the documents separately on two image carrying members, and (ii) a single toner image on one of the two image carrying members. A jam detector detects a jammed sheet, and a delivery detector detects delivery of a copied sheet to outside the apparatus. Image signals are eliminated from memory in accordance with a progression of image formation. If the jam detector detects the occurrence of the jammed sheet, a control unit prohibits the memory from eliminating the image signals until the delivery detector detects a next sheet delivered from the apparatus, so that the selected image expected to be formed by the image forming unit on the jammed sheet may be properly formed on a following sheet based on the image signals retained in the memory. A selector is provided for selecting one of a both-surface copy mode and a single-surface copy mode, wherein the control unit controls the memory to store the image signals corresponding to two pages of the documents when the both-surface copy mode is selected and to store the image signals corresponding to the single page of the documents when the single-surface copy mode is selected.
REFERENCES:
patent: 4571069 (1986-02-01), Kimura et al.
patent: 4673990 (1987-06-01), Okada
patent: 5027159 (1991-06-01), Oda et al.
patent: 5282050 (1994-01-01), Ishizuka et al.
Fukuchi Masakazu
Haneda Satoshi
Ikeda Tadayoshi
Matsubara Akitoshi
Sato Yotaro
Konica Corporation
Pendegrass Joan
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