Impact-type recording apparatus

Details Impact-type recording apparatus Impact-type recording apparatus

1986-10-23

1988-05-17

Sewell, Paul T.

Typewriting machines

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

Imprint by pivoting of type-head-carrier and type-head...

4001572, 4001442, 101 9302, B41J 938, B41J 942

Patent

active

047446846

ABSTRACT:
An impact-type recording apparatus is disclosed. The apparatus of this invention comprises: a platen for supporting a recording medium; hammer means guided for reciprocal movement between a strike position where the hammer means strikes a character element to force it against an inked ribbon and a recording medium supported on the platen and a stand-by position where the hammer means is kept apart from the platen; energizing means for generating a force acting to move the hammer means from the stand-by position to the strike position; and control means for actuating the energizing means while the hammer means is being moved from the stand-by position to the strike position for striking purposes and while the hammer means is being moved from the strike position to the stand-by position for returning purposes. This construction enables the high-speed operation of the printing mechanism to be carried out with a low level of noise generation.

REFERENCES:
patent: Re29745 (1978-08-01), Gomi
patent: 3900094 (1975-08-01), Larsen et al.
patent: 3964384 (1976-06-01), Johnston
patent: 4308794 (1982-01-01), Adamoli et al.
patent: 4491069 (1985-01-01), Kawahara
patent: 4569607 (1986-02-01), Takemoto
patent: 4603985 (1986-08-01), Helinski
"Hammer Rebound Retention", Xerox Disclosure Journal vol. 1, No. 4, Apr. 1976, K. R. Frechette, pp. 23.

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