Electrographic typewriter

Details Electrographic typewriter Electrographic typewriter

1989-05-26

1991-09-17

Burr, Edgar S.

Typewriting machines

Annular typewriter

355220, B41J 245

Patent

active

050489836

ABSTRACT:
An electrophotographic typewriter comprises a housing on which are mounted an alphanumeric keyboard, a flat-plane display unit, a paper feed tray and a paper output tray. A paper feed path is routed through an electrographic print unit, located in the housing, and comprises a photoconductive drum surrounded by a charging unit, an optical print head, a developing unit, a transfer unit, an erasing unit and a cleaning unit arranged in sequence about the photoconductive drum. An electronics package processes the alphanumeric input data to generate the flat-plane display and the outputs to the optical print head. Hard paper copy is produced where the paper feed path passes between the photoconductive drum and the transfer unit.

REFERENCES:
patent: 4194833 (1980-03-01), Lester et al.
patent: 4300475 (1981-11-01), Bond
patent: 4660059 (1987-06-01), O'Brien
patent: 4685702 (1987-08-01), Kazuharu
patent: 4714940 (1987-12-01), Inoue et al.
patent: 4789259 (1988-12-01), Katayanagi
patent: 4818131 (1989-04-01), Sakai
patent: 4841334 (1989-06-01), Fukae et al.
Jason Office Products Catalog, 1989, p. 446--Description of Smith-Corona Mod. PWP-80.

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