Typewriting machines – Including type-set-assemblage mounted on carrier and... – Imprint by pivoting of type-head-carrier and type-head...
Patent
1990-09-25
1992-09-15
Wiecking, David A.
Typewriting machines
Including type-set-assemblage mounted on carrier and...
Imprint by pivoting of type-head-carrier and type-head...
4001573, 101 4302, B41J 942
Patent
active
051471426
ABSTRACT:
An impact type recording apparatus includes a platen for supporting a recording medium, a hammer guided for reciprocal movement between an impacting position in which it strikes against the platen and a retracted position spaced apart from the platen, energizing means producing a force for biasing the hammer from the retracted position toward the impacting position, means for detecting the position of the hammer to thereby detect the speed of the hammer, and drive control means for operating the energizing means with only one pulse to brake the hammer when the hammer is moved from the impacting position to the retracted position, and making the operation timing of the braking pulse variable in conformity with the result of the detection by the detecting means.
REFERENCES:
patent: 4192230 (1980-03-01), Blom
patent: 4407193 (1983-10-01), Hall
patent: 4538930 (1985-09-01), Dunfield
patent: 4547087 (1985-10-01), Heider
patent: 4569607 (1986-02-01), Takemoto
patent: 4744684 (1988-05-01), Maekawa
Saito Tetsuya
Shibazaki Nobuo
Canon Kabushiki Kaisha
Kelley Steven S.
Wiecking David A.
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