G - Physics – 03 – G
Patent
G - Physics
03
G
314/27
G03G 15/14 (2006.01) G03G 15/00 (2006.01) G03G 21/00 (2006.01)
Patent
CA 2015451
An image forming apparatus includes a rotatable cassette having a rotating section movable between a longitudinal feed position from which paper oriented longitudinally with respect to a feeding direction is fed, and a lateral feed position from which paper oriented laterally with respect to the feeding direction is fed. The rotating section is driven by a driving motor. A document size detection device detects the size and orientation of a document. An automatic paper selection function selects a cassette which stores appropriate copy paper to be fed, in accordance with document size/orientation data obtained from the document size detection device and magnification data. A timer measures a predetermined period of time. A RAM stores the document size/orientation data. A control means controls (i) the timer to start its measuring operation upon detection of a document size/orientation by the document size detection device, and (ii) the driving motor to move the rotating section of the rotatable cassette to either of the longitudinal and lateral feed positions which corresponds to a determined orientation of the copy paper if the copy material orientation changing means is selected by the automatic paper selection function, and there occurs no change in the document size/orientation data sent from the document size detection device to the RAM before the completion of the measuring operation by the timer. The control means renews the document/size orientation data stored in the RAM and restarts the measuring operation of the timer if the document size/orientation data have been changed before the completion of the first set measuring operation of the timer. With the above arrangement, even if there occurs a change in the document size/orientation data due to a detection error etc. within a predetermined time period, the rotating section of the rotatable cassette can be set in a desired feed position without undesirable rotations.
Mori Yoshiteru
Noda Yoshiyuki
Yamada Yoshikado
G. Ronald Bell & Associates
Sharp Kabushiki Kaisha
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