Type wheel for serial printing apparatus

Details Type wheel for serial printing apparatus Type wheel for serial printing apparatus

1980-06-24

1982-06-22

Sewell, Paul T.

Typewriting machines

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

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

101 9319, 400174, B41J 126

Patent

active

043359701

ABSTRACT:
Each of resilient tongues of a type wheel for use in a serial printing apparatus carries one or more type members. Each of the type members is provided with a curved or concave type face whose center of curvature lies on an axis of a paper supporting platen so that the type face comes into even and tight contact with the platen surface in a printing position. The curved type face is formed on a projection having a forward end which is tapered toward or away from a plane perpendicular to a rotary axis of the type wheel. Further, the each of the type members is provided with a back face which is formed on a back portion of the curved type face. The back face is driven by a hammer which is oriented in a predetermined direction toward the axis of the platen so as to be evenly and entirely engaged with a striking face of the hammer in the printing position. The back portion of the curved type face comprises a projection which is tapered toward or away from a plane perpendicular the rotary axis of the type wheel. The back face is so inclined as to be parallel to a direction perpendicular to the predetermined direction of the hammer in the printing position.

REFERENCES:
patent: 3202257 (1965-08-01), Rihm
patent: 3640369 (1972-02-01), Rolph
patent: 3643774 (1972-02-01), Kondur
patent: 3651916 (1972-03-01), Becchi
patent: 3677386 (1972-07-01), Herterich et al.
patent: 3773160 (1973-11-01), Rava et al.
patent: 4084680 (1978-04-01), Deetz

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