Photocopying – Contact printing – Light boxes
Patent
1990-04-26
1992-11-17
Braun, Fred L.
Photocopying
Contact printing
Light boxes
355308, G03G 2100, G03G 1500
Patent
active
051647702
ABSTRACT:
An image forming apparatus includes a device for setting the apparatus in a check mode to check a state of the apparatus and for selectively executing one of a plurality of check operations. In one aspect, each check operation is set using a commonly provided numeral key, and the check mode is unconditionally released using a clear key. In another aspect, one of the check modes includes a test movement of a movable member used in image formation. In still other aspects, sheet transporting operations are controlled based on the location of a sheet jam, or based on the selection of a sheet sorter. In still other aspects, the state of each of the image formation devices is checked even if an improper state has already been detected, plural error states are repeatedly displayed in a specific order, and a display unit is commonly used for a variety of purposes.
REFERENCES:
patent: 4054380 (1977-10-01), Donohue et al.
patent: 4057341 (1977-11-01), Sohm
patent: 4133477 (1979-01-01), Marino et al.
patent: 4186299 (1980-01-01), Batchelor
patent: 4196476 (1980-04-01), Steiner
patent: 4470692 (1984-09-01), Shimizu
Furuichi Katsushi
Honma Toshio
Murakami Katsumi
Yokohmizo Yoshikazu
Braun Fred L.
Canon Kabushiki Kaisha
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