Character slug construction

Details Character slug construction Character slug construction

1976-12-06

1978-06-06

Sewell, Paul T.

Typewriting machines

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

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

101 9317, 400174, B41J 130

Patent

active

040930599

ABSTRACT:
An impact printing element in the shape of a wheel is constructed by molding a thermoplastic character slug onto the tips of metal spokes or beams extending radially outward from a center section. The thermoplastic is bulk filled to give the slugs tolerance to impacting forces produced by an impact hammer for deflecting the slug toward a record medium enabling a print surface on the slug to cooperate in a process for marking the record medium. Each character slug has a front surface with a raised character extending therefrom and a rear surface adapted to be struck by the print hammer for moving the slug in a print operation. Extending from the rear surface of each character slug is a spherical section projection that directly receives the strike from the print hammer. The projection is a spherical section positioned at the centroid of the raised character.

REFERENCES:
patent: 3442365 (1969-05-01), Ragland et al.
patent: 3840105 (1974-10-01), Kittredge
patent: 3848722 (1974-11-01), Bolan et al.
patent: 3901371 (1975-08-01), Scott
patent: 3970186 (1976-07-01), Sohl et al.
IBM Tech. Disclosure Bulletin, R. H. Harrington, et al., vol. 18, No. 2, Jul. 1975, p. 371.
IBM Tech. Disclosure Bulletin, J. H. Meier, et al., vol. 16, No. 6, Nov. 1973, pp. 1689-1692.

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