Typewriting machines – Annular typewriter
Patent
1980-04-25
1981-10-20
Sewell, P. T.
Typewriting machines
Annular typewriter
21913761, 346163, B41J 302
Patent
active
042957460
ABSTRACT:
Two electrodes are arranged within an insulating tube to have longitudinal contact with each other. One of the electrode wires is connected to a voltage source and the other can be pulled out of the insulating tube as it is consumed, as for electrode feeding in metal paper printers.
REFERENCES:
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patent: 2957101 (1960-10-01), Barkley
patent: 3249734 (1966-05-01), Meyer
patent: 3369254 (1968-02-01), Cohen
patent: 3469070 (1969-09-01), Bernard et al.
patent: 3893128 (1975-07-01), Bauerlen
patent: 3965479 (1976-06-01), Sakamoto et al.
patent: 4157554 (1979-06-01), Bahr et al.
IBM Tech. Disc. Bulletin, D. J. Bahr et al., vol. 22, No 11, Apr. 1980, p. 4969.
IBM Tech. Disc. Bulletin, H. Lutz et al., vol. 21, No. 7, Dec. 1978, p. 2871.
IBM Tech. Disc. Bulletin, K. Hartmann, vol. 21, No 7, Dec. 1978, p. 2873.
International Business Machines - Corporation
Johnson Kenneth P.
Sewell P. T.
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