Typewriting machines – Including interposed inking device for record-medium – Endless ribbon or cartridge therefor
Patent
1990-05-02
1991-05-28
Eickholt, Eugene H.
Typewriting machines
Including interposed inking device for record-medium
Endless ribbon or cartridge therefor
400207, 206 53, 206389, 206206, 2421297, B41J 3200
Patent
active
050188852
ABSTRACT:
A cassette for a printing ribbon comprises a casing accommodating a supply spool which has a tube on which the printing ribbon is wound. An anti-unrolling element of plastics material comprises two portions of elongate shape, which are connected by means of an integral elastic hinge. The first portion performs a guiding and positioning function and is accommodated by means of a slot within the casing. The second portion has a blocking function with regard to the tube, and is movable on the outside of the casing, by means of the elastic hinge, from an inoperative position in which it is aligned with the first portion to an operative position in which it is rotated through 180.degree. and is substantially in superposed relationship with the first portion. The second portion is provided with a hook element which, in its operative position, engages the tube through an opening in the casing for positively blocking the supply spool both during storage and during transportation of the cassette to inhibit unrolling in a simple and reliable manner.
REFERENCES:
patent: 3381810 (1968-05-01), Lasher
patent: 3941231 (1976-03-01), Coleman et al.
patent: 4368992 (1983-01-01), Gagnebin
patent: 4627118 (1971-12-01), Daggs
"Cartridge Shipping Tab", IBM Tech. Disclosure Bulletin, vol. 20, No. 1, Jun. 1977, p. 42.
Eickholt Eugene H.
Ing. C. Olivetti & C. S.p.A.
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