Typewriting machines – Typing by other than type-face or type-die – Character formation by impact
Patent
1979-07-30
1981-08-18
Sewell, Paul T.
Typewriting machines
Typing by other than type-face or type-die
Character formation by impact
101 9305, B41J 312
Patent
active
042843634
ABSTRACT:
There is disclosed herein a dot matrix tilting print head assembly in which the print head is rotatably mounted in a frame. A solenoid is provided for rotating the print head a controlled distance so that printing occurs between previously printed dots. A pin extending from the print head is positioned into a larger diameter hole in the frame for controlling the distance to be one half of the center-to-center distance between printed dots. This entails maintaining very low tolerances for the mechanically moving parts. In addition, there is provided support members for allowing the removal of the print head alone from the frame means.
REFERENCES:
patent: 3759359 (1973-09-01), Stellmach
patent: 3892175 (1975-07-01), Heindke et al.
patent: 4010835 (1977-03-01), Martin et al.
IBM Tech. Disc. Bulletin, J. E. Lisinski et al., vol. 20, No. 12, May 1978, pp. 5097-5098.
Choberka John M.
Rex Donald K.
Barron Harry W.
Black John C.
International Business Machines Corp.
Jancin, Jr. J.
Sewell Paul T.
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