Typewriting machines – Including interposed inking device for record-medium
Patent
1996-10-07
1998-07-14
Burr, Edgar S.
Typewriting machines
Including interposed inking device for record-medium
400236, B41J 3100
Patent
active
057793727
ABSTRACT:
A printing system for transferring ink from an inked ribbon supplied from a ribbon roll having a tubular core with an inner surface onto a substrate. The system includes a rotatable locking cam hub having a reel hub with a first surface engageable with the inner surface of the ribbon roll, and an eccentric hub having a second surface engageable with the inner surface of the ribbon roll. The eccentric hub is rotatable relative to the reel hub to provide a variable diameter between the first surface of the reel hub and the second surface of the eccentric hub. The diameter of the locking cam hub may be reduced by rotating the eccentric hub relative to the reel hub to permit disposal of the ribbon roll tubular core about locking cam hub, and the diameter of the locking cam hub may be increased by rotating the eccentric hub relative to the reel hub to engageably retain the inner surface of the ribbon roll by the first surface of the reel hub and the second surface of the eccentric hub. The locking cam hub includes a knurled outer surface to prevent rotational and axial slippage of the ribbon roll relative to the hub, and a spring member to prevent vibrationally induced rotation between the reel hub and the eccentric hub.
REFERENCES:
patent: 4812063 (1989-03-01), Kunimitsu et al.
patent: 4919555 (1990-04-01), Kikuchi
patent: 5399036 (1995-03-01), Yamaguchi
Burr Edgar S.
Illinois Tool Works Inc.
Nguyen Anthony H.
O'Brien John P.
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