Method and apparatus for forming an image with a reversible ther

Details Method and apparatus for forming an image with a reversible ther Method and apparatus for forming an image with a reversible ther

1990-04-23

1993-08-17

Picard, Leo P.

Photocopying

Contact printing

Light boxes

346 76PH, 3461531, 355212, 355274, G03G 2100

Patent

active

052373681

ABSTRACT:
In image formation, a reversible thermosensitive medium, preferably in the form of an endless belt, is selectively heated in accordance with an electrical image signal, so that the areas of the thermosensitive belt will have different transmittances corresponding to the respective pixels of the image signal. A photosensitive member, preferably in the form of a drum, widely employed in electrophotography, is uniformly charged, and the thermosensitive belt is then superimposed on the photosensitive drum, and the photosensitive drum is exposed to light of a uniform intensity through the thermosensitive belt. The intensity of light which each area of the photosensitive drum receives depends of the transmittance of the corresponding area of the thermosensitive belt. An electrostatic image that is formed on the photosensitive drum as a result of the exposure is therefore a conversion from the transmittance image on the thermosensitive belt. A toner image may then be developed and transferred and fixed on recording paper.

REFERENCES:
patent: 3937572 (1976-02-01), Goynor et al.
patent: 4675699 (1987-06-01), Kan et al.
patent: 4752800 (1988-06-01), Matui
patent: 4766403 (1988-08-01), Sasaki et al.
Patent Abstracts of Japan, vol. 6, No. 212 (Japanese 57-118253; Jul. 23, 1982).
"Display System sing Reversible Heat-Sensitive Material" Nakaya et al. Proceedings of SID, vol. 22/1, 1981, pp. 23-27.
"Display Device Using Thermotropically Reversible Material" Saito et al. Technical Paper of the Institute of Electronics and Communication Engineers of Japan, vol. 80, No. 123, IE 80-61 to 62, Sep. 24, 1980, pp. 1-8.
"Reversible Thermosensitive Material and Printing Characteristics" Hotta et al. Proceedings of 4th Japanese Symposium on Non-Impact Printing Technologies Symposium, Jul. 23-24, 1987 pp. 57-60.

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