Photocopying – Projection printing and copying cameras – Detailed holder for original
Patent
1987-11-24
1989-04-18
Hayes, Monroe H.
Photocopying
Projection printing and copying cameras
Detailed holder for original
355 41, G03B 2762
Patent
active
048231657
ABSTRACT:
A document detector for a copying machine includes a rectangular document support atop the machine housing and being of corner aligning type which has at least first and second side edges orthogonal to each other for the support thereon of a document with corresponding adjoining sides of the document held generally in abutment with the first and second side edges, and a hingedly supported, generally flat cover mounted on the machine housing for covering the document support when the cover is moved to a closed position. The detector includes a light emitting member and a light receiving member both disposed inside the machine housing at a location beneath one of the first and second side edges of the document support, a reflecting medium secured to the cover for reflecting a beam of light, emitted from the light emitting member, towards the light receiving member, a reflector carried inside and by the machine housing and positioned immediately below such one of the side edges of the document support for guiding the light beam from the light emitting member upwardly towards the reflecting medium and also for guiding the light beam, which has been reflected from the reflecting medium, towards the light receiving member, and a circuit for providing an output indicative of the presence of the document on the document support.
REFERENCES:
patent: 4338020 (1982-07-01), Yukawa et al.
patent: 4511246 (1985-04-01), Nishiyama
patent: 4568181 (1986-02-01), Nishiyama
Narukawa Atsushi
Nishiyama Haruo
Hayes Monroe H.
Sharp Kabushiki Kaisha
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