Typewriting machines – Including interposed inking device for record-medium – Ribbon-feeding mechanism
Patent
1989-11-27
1990-08-28
Eickholt, Eugene H.
Typewriting machines
Including interposed inking device for record-medium
Ribbon-feeding mechanism
400208, B41J 3114
Patent
active
049520865
ABSTRACT:
A printer has a ribbon cassette with an ink ribbon wound between a feed reel and a take-up reel mounted in a stationary state independently of a carriage, so that the ink ribbon may be let off from the ribbon cassette and is recovered into the ribbon cassette by means of a print head mounted on the carriage along with the movement of the carriage in the printing direction, in which the carriage is provided with a control roller that is disposed on the transfer route of the ink ribbon and is controlled so as to transfer the ink ribbon in the length corresponding to the printing portion at every printing by the print head in the printing action in the direction of the take-up reel and to fix the ink ribbon when the carriage returns or when transferring without printing. Between the reels, a reel control mechanism is disposed for applying a rotating force of small torque of such an extent as to slip with respect to the ribbon let-off force by the print head to the both reels in the printing action in the take-up rotating direction, and applies a rotating force of large torque to the both reels when the carriage returns in the take-up rotating direction.
REFERENCES:
patent: 4000804 (1977-01-01), Zaltieri
patent: 4264224 (1981-04-01), Mathews
patent: 4420268 (1983-12-01), Tsukamura et al.
patent: 4577199 (1986-03-01), Saiki et al.
patent: 4611937 (1986-09-01), Sato et al.
patent: 4621270 (1986-11-01), Mizutani et al.
patent: 4629346 (1986-12-01), Surti
patent: 4798487 (1989-01-01), Hattori et al.
Eickholt Eugene H.
Sharp Kabushiki Kaisha
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