Typewriting machines – Sheet or web – For feeding web record-medium
Patent
1990-05-07
1990-12-25
Burr, Edgar S.
Typewriting machines
Sheet or web
For feeding web record-medium
226 76, B41J 1128
Patent
active
049798375
ABSTRACT:
A paper tractor comprising a driven sprocket wheel engaging recording paper to feed same, a chassis holding the sprocket wheel on its both sides and movable widthwise of recording paper, a fixed member supporting the chassis slidably via an engaging portion formed at one end thereof and extending widthwise of the recording paper, and a locking lever provided swingable at one end of the chassis and having a locking cam engageable with part of the fixed member. The locking cam including a first cam face for restricting the movement of the chassis by engaging part of the fixed member when the locking lever is swung to a locking position, and a second cam face for allowing the chassis to move opposite to part of the fixed member in virtually non-engaged relationship thereto when the locking lever is swung to its released position.
REFERENCES:
patent: 3283875 (1966-11-01), Davies
patent: 3583539 (1971-06-01), Shellabarger
patent: 3693856 (1972-09-01), Funk
patent: 4189078 (1980-02-01), Spisz
patent: 4304345 (1981-12-01), Carlin
patent: 4315585 (1982-02-01), Seitz
patent: 4344715 (1982-08-01), Van Horne et al.
patent: 4365905 (1982-12-01), Jung
patent: 4389007 (1983-06-01), Seitz
patent: 4394949 (1983-07-01), Gomi
patent: 4471896 (1984-09-01), Milano, Jr.
patent: 4637537 (1987-01-01), Ikeda
IBM Technical Disclosure Bulletin, "Tractor Clamp Device Cam Lock", Williams, vol. 19, No. 11, Apr. 1977, pp. 4114-4115.
Adams Bruce L.
Burr Edgar S.
Cohen Moshe I.
Seikosha Co. Ltd.
Wilks Van C.
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