High speed print head system and method

Details High speed print head system and method High speed print head system and method

1979-12-28

1981-11-17

Sewell, Paul T.

Typewriting machines

Typing by other than type-face or type-die

Character formation by impact

101 9305, B41J 312

Patent

active

043008461

ABSTRACT:
A high speed print head system includes a print head pivotally and resiliently coupled to a frame which is laterally movable on a carriage system. The print head includes an elongated nose piece having therein a plurality of print rods which can be controllably forced beyond the end of the nose piece to impact a ribbon and paper supported by a platen to produce dots on the paper. The pivotal and resilient coupling is achieved by means of a flexure having first and second opposed connection points connected to the frame and third and fourth opposed connection points connected to the print head. Two permanent magnets are rigidly attached to the frame substantially above the axis of the elongated nose piece and substantially symmetrically with respect to the elongated nose piece. A pair of electromagnets rigidly attached to the print head opposite the respective permanent magnets are controllably energized to produce continuously variable forces between the frame and the print head. The continuously variable forces produce continuously variable pivoting of the print head about its neutral position, whereby high resolution character printing can be effected with a minimum dot overlap, and consequently with a minimum number of dot printing operations.

REFERENCES:
patent: 4059182 (1977-11-01), Gustafsson et al.
patent: 4076111 (1978-02-01), Robinson et al.
patent: 4149807 (1979-04-01), Avison et al.
patent: 4150902 (1979-04-01), Brescia

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