Typewriting machines – Sheet or web – Including sheet guide
Patent
1978-03-21
1980-04-08
Wright, Jr., Ernest T.
Typewriting machines
Sheet or web
Including sheet guide
400637, 400578, B41J 1160
Patent
active
041970250
ABSTRACT:
In the illustrated embodiment, a guide element is provided in advance of the platen-pressure roller gap for the purpose of preventing creasing of thin papers during transport. The guide element may have a retracted position providing for unobstructed movement of the paper leading edge along an insertion channel and into the platen-pressure roller gap. Then during paper transport by the platen, the guide element is shifted to an active position for deflecting the paper toward the platen such that the paper contacts the platen in advance of the pressure roller over a substantial angle (e.g. 15.degree.-20.degree.). A spring for urging the guide element to active position may have a spring force more insufficient to substantially deflect thick types of paper not subject to creasing.
REFERENCES:
patent: 1217112 (1917-02-01), Gibson
patent: 1332263 (1920-03-01), Kurowski
IBM Technical Disclosure Bulletin, "Paper Table Actuated Feed Rollers and Paper Gate", Klein et al., vol. 17, No. 5, Oct. 1974, pp. 1263-1264.
Ajeman Matthew L.
Siemens Aktiengesellschaft
Wright, Jr. Ernest T.
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