Microprocessor-controlled printing mechanism having an opto-elec

Details Microprocessor-controlled printing mechanism having an opto-elec Microprocessor-controlled printing mechanism having an opto-elec

1983-12-21

1985-10-15

Sewell, Paul T.

Typewriting machines

Including type-set-assemblage mounted on carrier and...

Including type-faces movable relative to type-face-carrier

101 9302, 101 9303, 4001572, 4001573, 400166, 400167, B41J 938

Patent

active

045470871

ABSTRACT:
A plunger armature printing system incorporates an opto-electronic sensor for sensing the movement of a vane fixed to the armature of the print mechanism. The output signal generated by the sensor is employed to define periods for measurement of the speed of movement of the armature. A microprocessor is employed for supplying accelerating and decelerating pulses to the armature magnet for causing the armature to achieve a preselected printing force, in response to the time intervals between similar signals produced by said sensor, and to return said armature to its rest position rapidly without rebound.

REFERENCES:
patent: 4192230 (1980-03-01), Blom et al.
patent: 4347786 (1982-09-01), Sweat et al.
patent: 4407193 (1983-10-01), Hall et al.
IBM Technical Disclosure Bulletin, vol. 24, No. 11B, (Apr. 1982), pp. 6105-6106; and No. 29, (Feb. 1982), pp. 4823-4827.
Abstract of Japanese Patent Application No. 55-124681, (Dec. 5, 1980).

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