Photocopying – Contact printing – Light boxes
Patent
1991-09-18
1992-08-04
Hayes, Monroe H.
Photocopying
Contact printing
Light boxes
355 50, 355316, G03B 2100
Patent
active
051363429
ABSTRACT:
A sheet resist apparatus disposed in a transporting path of a recording sheet transported from a sheet supplying unit to an image forming unit in an image forming apparatus, includes: a pair of first rollers disposed in the transporting path; a pair of second rollers disposed in the transporting path at a downstream of the first rollers; a first driving device for rotating the first rollers to transport the recording sheet toward the second rollers; and a second driving device for rotating the second rollers to transport the recording sheet, which is transported from the first rollers, toward the image forming unit in synchronization with a timing of image-formation of the image forming unit. The sheet resist apparatus further includes: a sensor disposed between the first rollers and the second rollers for detecting a tip of the recording sheet transported from the first rollers; and a control device for controlling the first and second driving devices on a basis of a result of detection of the sensor, such that the first driving device stops driving once before the tip of the recording sheet reaches the second rollers, and such that the first driving device resumes driving earlier than the second driving device starts driving by a predetermined time period.
REFERENCES:
patent: 4669853 (1987-06-01), Sosinski et al.
patent: 4708456 (1987-11-01), Shibata et al.
patent: 4956651 (1990-09-01), Emori
patent: 5043771 (1991-08-01), Shibata et al.
Ida Masayuki
Nakayama Osamu
Okamoto Yuji
Takahashi Kozo
Hayes Monroe H.
Sharp Kabushiki Kaisha
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