Photocopying – Projection printing and copying cameras – Combined with or convertible to a contact printer
Patent
1984-12-13
1986-12-09
Braun, Fred L.
Photocopying
Projection printing and copying cameras
Combined with or convertible to a contact printer
355 14C, G03G 1504
Patent
active
046277137
ABSTRACT:
A copying machine includes a reading device for optically scanning a document and reading image data of the document, a copying device for forming a copy of the document in accordance with the image data read by the reading device and a density signal, a manual density adjusting device for generating a plurality of limited and discrete density signals, an automatic density adjusting device for detecting a density of the document so as to generate a density signal in accordance with the detected density, and a selecting device for supplying one of the outputs of the manual density adjusting device and automatic density adjusting device to the copying device. The manual density adjusting device has first and second operation members, a density of the density signal is increased in accordance with the operation of the first operation member and is decreased in accordance with the operation of the second operation member. The automatic density adjusting device has a third operation member. The selecting device selects the output of the automatic density adjusting device in accordance with the operation of the third operation member and selects the output of the manual density adjusting means in accordance with the operation of the first and second operation members.
REFERENCES:
patent: 4294536 (1981-10-01), Paxton
patent: 4332464 (1982-06-01), Bartulis et al.
patent: 4350435 (1982-09-01), Fiske et al.
patent: 4361395 (1982-11-01), Washio et al.
patent: 4542985 (1985-09-01), Honma et al.
Braun Fred L.
Kabushiki Kaisha Toshiba
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