Dual mode electrophotographic apparatus having dual function pri

Details Dual mode electrophotographic apparatus having dual function pri Dual mode electrophotographic apparatus having dual function pri

1975-11-03

1977-09-06

Braun, Fred L.

Photocopying

Projection printing and copying cameras

Combined with or convertible to a contact printer

346160, 355 3R, 358300, G03G 1500

Patent

active

040464717

ABSTRACT:
A dual mode xerographic copier/printer is selectively operable to form a latent image of an original document on a photoconductor, or to raster-scan the photoconductor with a laser printing beam which is under the control of a binary-data-defined image to thereby form a latent image thereof.
The latent image, whether it is formed in the copy mode or the print mode, is toner developed. The developed image is then transferred to a sheet of copy paper. This copy paper may be of variable size.
In the copy mode, the laser printing beam is controlled to erase the photoconductor bordering that photoconductor area which will coincide with the sheet during transfer, i.e., bordering the latent image of the original document.
In the print mode, a data processor formats the binary-data-defined image to fit into a photoconductor area compatible with the size of the copy paper. The resulting electrical signals then control the laser printing beam to erase the entire photoconductor, exclusive of the binary-data-defined image.

REFERENCES:
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patent: 3358081 (1967-12-01), Young et al.
patent: 3597071 (1971-07-01), Jones
patent: 3681527 (1972-08-01), Nishiyama et al.
patent: 3751155 (1973-08-01), Liechty
patent: 3809472 (1974-05-01), Liechty
patent: 3834807 (1974-09-01), Fuller et al.
patent: 3898627 (1975-08-01), Hooker et al.
patent: 3912387 (1975-10-01), Brooke
R. A. Thorpe, "Triple Function Box", IBM Technical Disclosure Bulletin, Mar. 1973, vol. 15, No. 10, pp. 3259-3260.

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