Printing device forms compensation and ribbon control means

Details Printing device forms compensation and ribbon control means Printing device forms compensation and ribbon control means

1977-02-28

1978-05-23

Sewell, Paul T.

Typewriting machines

Including interposed inking device for record-medium

Including mechanism for shifting ribbon laterally at...

400 56, 400 58, 400124, B41J 3358, B41J 312

Patent

active

040906000

ABSTRACT:
A printing device is provided in which a flexible strip supported by a fixed guide bar extending over the full printing width of the printing device serves to press the record media into contact with the printer platen to achieve more accurate control of the printing impacts, and serves as a track for guide rollers associated with the print head, thus giving a smooth transition between adjacent different thicknesses of record media in the printing device. The flexibility and low co-efficient of friction of the strip allow insertion and movement of the record media without raising the strip or the printing head. The guide bar acts as a guide for insertion of the record media, and also provides a camming surface co-operating with a suitable follower operatively connected to the print ribbon cassette so as to rock the cassette laterally to minimize the ribbon wear as the print head traverses a line of printing. The bar may also be designed to co-operate with a cover enclosing the print mechanism.

REFERENCES:
patent: 677111 (1901-06-01), Brooks
patent: 2312314 (1943-03-01), Bordonaro
patent: 3750792 (1973-08-01), Liles
patent: 3758012 (1973-09-01), Bonner et al.
patent: 3863749 (1975-02-01), Perry et al.
patent: 3882985 (1975-05-01), Liles
patent: 3904010 (1975-09-01), Krauss et al.
patent: 3904011 (1975-09-01), Matschke
patent: 4010834 (1977-03-01), Linder

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