Typewriting machines – Including type-set-assemblage mounted on carrier and... – Including type-faces movable relative to type-face-carrier
Patent
1990-10-30
1992-03-03
Wiecking, David A.
Typewriting machines
Including type-set-assemblage mounted on carrier and...
Including type-faces movable relative to type-face-carrier
400175, B41J 130
Patent
active
050926918
ABSTRACT:
A printing machine having a structure for detachably supporting a cassette housing therein a type wheel is provided. The structure includes a cassette holder which may be pivoted between an operative position where printing may be carried out and an inoperative position where no printing is effected but the cassette may be replaced by another. The structure also includes a motor supporting member for supporting thereon a selection motor which may be engaged with or disengaged from the type wheel, wherein the motor supporting member is also pivoted to the cassette holder in a depending manner and moves between two positions in association with the pivotal movement of the cassette holder. Also provided is a guiding mechanism for guiding the movement of the motor supporting member thereby insuring that the motor is brought into engagement with the type wheel when located at the operative position and the motor is disengaged from the type wheel when located at the inoperative position. In accordance with another aspect of the present invention, there is provided a cassette for housing therein a type wheel, which is provided with ribs for guiding the advancement of an ink ribbon. In accordance with a further aspect of the present invention, there is provided a cassette for housing therein a type wheel, which is provided with a printing window which is located as shifted sideways with respect to a vertical center line passing through a rotating center of the type wheel.
REFERENCES:
patent: 4074798 (1978-02-01), Berger
patent: 4124312 (1978-11-01), Johnson
patent: 4161373 (1979-07-01), Chvatlinsky
patent: 4245916 (1981-01-01), Habich et al.
patent: 4389130 (1983-06-01), Giolitti
patent: 4507001 (1985-03-01), Babler
patent: 4678352 (1987-07-01), Kittel et al.
IBM Tec Disc Bull, "Improving Print Wheel Inertia in Impact Printer", Kane; vol. 21, No. 6, Nov. 1978, pp. 2201-2202.
IBM Tech Disc. Bull; "Print Wheel Misregistration Protecter"; Springer; vol. 24, No. 8, Jan. 1982, pp. 4346-4347.
IBM Tech Disc Bull; "Printwheel Cartridge w/Knurled Ribbon Guide Surface"; Aldrich et al.; vol. 26, No. 12, May 1984; p. 6629.
Ricoh & Company, Ltd.
Wiecking David A.
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