Printer with reversible ribbon driving means for rewinding overs

Details Printer with reversible ribbon driving means for rewinding overs Printer with reversible ribbon driving means for rewinding overs

1998-02-23

1999-11-30

Yan, Ren

Typewriting machines

Including interposed inking device for record-medium

Ribbon-feeding mechanism

400232, B41J 3336, B41J 3340, B41J 3344

Patent

active

059930926

ABSTRACT:
A thermal printer for printing on a continuous print medium by ink transfer from a thermal print ribbon has a print head which is pivotally mounted and which is driven in an oscillatory nodding motion by means of a stepper motor so as repeatedly to bring a linear array of energizable printing elements to bear against a platen roller. Both the element array and the platen extend transversely to respective paths of travel of the print medium and the ribbon. The print medium is fed through the printer from an inlet region, between the platen and print head, and thence to an outlet region. The instantaneous rate of travel of the print medium past the print head is substantially the same as the rate of feed of print medium to the printer. Typically this rate is of the order of 250 to 400 mm per second. The ribbon also travels between the print head and the platen, overlying the print medium and is driven in such a manner that it travels at the same rate as the print medium during each printing operation. Between each printing operation the ribbon is driven in reverse to rewind any unused portion of ribbon which has overshot the printhead.

REFERENCES:
patent: 4675698 (1987-06-01), Tsutsumi
patent: 4712113 (1987-12-01), Brooks et al.
patent: 5181788 (1993-01-01), Norman, Jr. et al.
patent: 5433539 (1995-07-01), German
patent: 5533819 (1996-07-01), Watanabe et al.
patent: 5647679 (1997-07-01), Green et al.
patent: 5700096 (1997-12-01), Satoh et al.
patent: 5711623 (1998-01-01), Nose
patent: 5816719 (1998-10-01), Palmer
(1) European Search Report with Annex and English Language Abstract of EP 97309683.
(2) English Language Abstract of Japan Publication No. 60 187580.
(3) English Language Abstract of Japan Publication No. 63 071382.

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