Typewriting machines – Including interposed inking device for record-medium – Ribbon spool or mount therefor
Patent
1998-01-21
1999-08-03
Burr, Edgar
Typewriting machines
Including interposed inking device for record-medium
Ribbon spool or mount therefor
B65H 7530, B65H 7500, B65H 7518
Patent
active
059315881
ABSTRACT:
With a view to making it possible to load a cassette onto a to-be-loaded body in a slack-free good condition of a web accommodated in the cassette, preventing the entry of dust into engaging grooves after the loading of the cassette, and permitting the loading of only such a cassette as is suitable for the loading, there is provided a winding core in a ribbon cassette which accommodates an ink ribbon in a wound-up state, the winding core having a plurality of engaging grooves formed circumferentially in its peripheral surface for engagement with a plurality of engaging projections formed circumferentially at equal intervals on an outer peripheral surface of a winding bobbin of the to-be-loaded body onto which the cassette is to be loaded, the engaging grooves each having side engaging portions for engagement with side faces of each engaging projection and an upper engaging portion for engagement with an axial tip face of each engaging projection in an abutted or covering relation thereto.
REFERENCES:
patent: 4423974 (1984-01-01), Muller et al.
patent: 5326182 (1994-07-01), Hagstrom
Alps Electric Co. ,Ltd.
Burr Edgar
Sandusky Amanda B.
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