Dot printer

Details Dot printer Dot printer

1974-11-11

1977-06-07

Rader, Ralph T.

Textiles: fiber preparation

197 15, 101 1, 346 75, 235 6111J, 235201ME, B41J 2320

Patent

active

040277623

ABSTRACT:
Each wire of a wire printer is driven by a separate pneumatic motor. Each motor is actuated by compressed air which is selectively passed through an electrically operated valve for each motor. Each valve is actuated by an electric signal indicating whether the associated printing wire should be driven to print a desired character. Coupled between a compressed air source and all of the individual valves is an electrically operated pressure control valve which is normally closed to block transmission of compressed air from the source to the individual valves. After the individual valves are opened by electric signals to permit the printing of a desired character, the control valve is then opened to permit transmission of the compressed air through the opened individual valves to actuate the individual pneumatic motors to drive the print wires necessary to print the desired character.

REFERENCES:
patent: 531352 (1894-12-01), Wier
patent: 534073 (1895-02-01), Morris
patent: 2869455 (1959-01-01), Knutsen
patent: 2904070 (1959-09-01), Lynott
patent: 3152858 (1964-10-01), Wadey
patent: 3159099 (1964-12-01), Wadey
patent: 3217640 (1965-11-01), Bradshaw
patent: 3226530 (1965-12-01), Greenblott et al.
patent: 3315775 (1967-04-01), Schonfeld
patent: 3572486 (1971-03-01), Hebel et al.
patent: 3729079 (1973-04-01), Zenner et al.
patent: 3911818 (1975-10-01), MacIlvaine

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