Compact print wheel printer with life extended character selecti

Printing – Selective or progressive – Bed and platen machines

Patent

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Details

101 9321, 101 9322, B41J 122

Patent

active

051580152

ABSTRACT:
A print wheel printer of the type having a print wheel spring extension releasably engaged in a primary indent formed in the circumferential surface of the print wheel shaft is provided with relative angular surface relationships for the spring indent or spring extension such that the initial impact and force of the spring extension dropping or falling into the shaft indent is reduced extending the life of the printer while concurrently reducing the noise level of the printer operation. An auxiliary indent is also formed in the circumferential surface of the print wheel shaft in advance of the primary indent to provide for minimal engagement of the print wheel extension with the print wheel shaft during periods of time when the print wheel spring extension is not in engagement relative to the primary indent.

REFERENCES:
patent: 536448 (1895-03-01), Teal
patent: 1266807 (1918-05-01), Hubbard
patent: 1951682 (1934-03-01), Varren
patent: 3269306 (1964-02-01), Smilgys
patent: 4314505 (1982-02-01), Krembel, Jr.
patent: 4328747 (1982-05-01), Fujiwara et al.
patent: 4416557 (1983-11-01), Arai
patent: 4760785 (1988-08-01), Hori
patent: 4804282 (1989-02-01), Hori

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