Photocopying – Projection printing and copying cameras – Combined with or convertible to a contact printer
Patent
1979-05-30
1981-01-13
Braun, Fred L.
Photocopying
Projection printing and copying cameras
Combined with or convertible to a contact printer
271DIG9, 271258, 271308, 271311, 355 3SH, G03G 1500
Patent
active
042446481
ABSTRACT:
A jam detector for use in a plain paper copying machine of the type in which the copy paper to which the image has been transferred from the surface of a photoconductive drum is removed from the drum by a pick-off element which acts on a narrow strip of the copy paper extending rearwardly from the leading edge of the paper along one side edge thereof wherein the leading edge of a narrow or skewed or otherwise misdirected copy paper which misses the pick-off element is engaged by a jam detector element positioned in the path of the paper a predetermined distance inboard of the pick-off element to cause the jam detector element to disable the machine and to illuminate the jam indicating signal light. The arrangement is such that the machine cannot be reset for the next operation until such time as the jammed copy paper is removed from the machine. In an alternate embodiment, the jam detector element directs the sheet which has missed the pick-off element to guides which carry the paper back toward the output rolls of the machine which feed the paper back to the usual delivery location.
REFERENCES:
patent: 3791729 (1974-02-01), Steiner
patent: 3820776 (1974-06-01), Fujimoto et al.
patent: 3831933 (1974-08-01), Fantozzi
patent: 3833896 (1974-09-01), Suzuki
patent: 3912256 (1975-10-01), Nagahara
patent: 3918403 (1975-11-01), Vock
patent: 3999851 (1976-12-01), Sakamaki
patent: 4060320 (1977-11-01), Doi et al.
patent: 4073585 (1978-02-01), Kobayashi et al.
Beaudrot, C. B., "Backup Pick-Off Control", IBM Technical Disclosure Bulletin, vol. 15, No. 7, Dec. 1972, p. 2195. _
Eberlein Dietmar
Schultes Max
Braun Fred L.
Savin Corporation
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