Typewriting machines – Including type-set-assemblage mounted on carrier and... – Including type-faces movable relative to type-face-carrier
Patent
1981-03-23
1986-12-09
Sewell, Paul T.
Typewriting machines
Including type-set-assemblage mounted on carrier and...
Including type-faces movable relative to type-face-carrier
400175, 400521, 400699, 4007092, B41J 130
Patent
active
046277501
ABSTRACT:
In a system including a cassette containing a print wheel arranged to cooperate with holding devices provided in an impact printer having a rotatable setting shaft to which the print wheel can be releasably fastened for rotation therewith, the cassette is formed to enclose the print wheel on all sides except the region where it is to be acted upon by a printing hammer. The printer can be provided with a detent mechanism cooperating with counterdetent elements in the cassette to hold the cassette in a fully inserted position in the printer. The cassette can additionally be provided with an outwardly curved collecting funnel positioned for catching dirt released in the region where the type faces of the printing wheel strike a printing medium. For use in printers in which the setting shaft is mounted on a pivotal carrier in order to pivot into a position which facilitates mounting of the print wheel, the print wheel can be provided with integral protrusions which constitute holding elements for mounting the print wheel directly in the cassette with only bearing play in the axial and radial directions, and the cassette can be provided with bearing surfaces which cooperate with cup-shaped surfaces provided in the printer to prevent rotation of the cassette relative to the printer when the print wheel is fastened to the setting shaft and the setting shaft carrier has been pivoted to bring that shaft into its printing position.
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IBM Tech. Disc. Bulletin, vol. 18, No. 10, Mar. 1976, p. 3356.
IBM Tech. Disc. Bulletin, by J. A. Craft, vol. 11, No. 4, Sep. 1968, p. 390.
Gerken Heiner
Kittel Arthur
Olympia Werke AG
Sewell Paul T.
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