Image forming apparatus having automatic preliminary scanning st

Details Image forming apparatus having automatic preliminary scanning st Image forming apparatus having automatic preliminary scanning st

1996-02-08

1998-07-07

Royer, William J.

Electrophotography

Diagnostics

Document handling

355 75, 399376, 399380, G03G 1500

Patent

active

057782768

ABSTRACT:
An image forming apparatus having a preliminary scanning function which is automated by detecting a selection of at least one of an automatic color selecting mode and a letter and photo mixed mode, an existence of an original document on a contact glass, and a movement of an original platen cover from an open state to a closed state. During performing the preliminary scanning function, a depression of a copy start button is not ignored but accepted, and therefore, when the copy start button is depressed, a scanning process for forming an image starts automatically upon a completion of the preliminary scanning. In addition, various instructions, such as a numeric input for instructing, as an example, a number of copies are accepted. The start of preliminary scanning may be selected by operator preference to start when detecting existence of an original document or when detecting an instruction input by the copy start key. The distance to be scanned during a preliminary scanning process and during the scanning process is controlled based upon feedback signals from an original document size detect sensor so as to minimize the scanning area in accordance with the size of the original document.

REFERENCES:
patent: 4579445 (1986-04-01), Hasegawa
patent: 4939553 (1990-07-01), Sato et al.
patent: 5198859 (1993-03-01), Soma et al.
patent: 5218408 (1993-06-01), Inada et al.
patent: 5223904 (1993-06-01), Umezawa
patent: 5500725 (1996-03-01), Takasu et al.

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