Printing – Selective or progressive – Bed and platen machines
Patent
1990-06-07
1992-10-27
Burr, Edgar S.
Printing
Selective or progressive
Bed and platen machines
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.
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patent: 536448 (1895-03-01), Teal
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patent: 3269306 (1964-02-01), Smilgys
patent: 4314505 (1982-02-01), Krembel, Jr.
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patent: 4416557 (1983-11-01), Arai
patent: 4760785 (1988-08-01), Hori
patent: 4804282 (1989-02-01), Hori
Harada Yasuhiro
Nakata Toshio
Burr Edgar S.
Carothers, Jr. W. Douglas
Hilten John S.
Seiko Epson Corporation
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