Typewriting machines – Sheet or web – Including friction-feed means
Patent
1984-08-03
1985-07-09
Burr, Edgar S.
Typewriting machines
Sheet or web
Including friction-feed means
4006373, B41J 13048
Patent
active
045279225
ABSTRACT:
A feed roller device of a typewriter used for reliably urging a sheet of paper to be printed against a platen. In this feed roller device, a pair of feed roller assemblies are parallelly arranged in parallel to the axial line of the platen and rocking levers are provided at the central positions in the axial lines of the feed roller assemblies, respectively. Each of these two rocking levers is rockingly supported by a typewriter frame, pivotally supported at one end thereof by a connecting rod of one of the feed roller assemblies and provided at the other end thereof with a spring, which urges the feed roller assembly against the platen by the urging force thereof. Consequently, only two springs are used, so that the adjustment of the feed roller assemblies urging the platen in urging force can be facilitated.
REFERENCES:
patent: 1062569 (1913-05-01), McLaughlin
patent: 1453577 (1923-05-01), Armstrong
patent: 2059214 (1936-11-01), Dreher
patent: 2297490 (1942-09-01), Martin et al.
"Frame for Paper Feed Rolls"; R. H. Marowski et al; IBM Technical Disclosure Bulletin, vol. 14, No. 3; 8/1971; p. 905.
"Paper-Handling Apparatus for Typewriter & Printers"; R. J. Jenney et al; IBM Technical Disclosure Bulletin, vol. 20, No. 12; 5/1978; p. 5221.
"Paper Feed Mechanism"; E. R. Lloyd et al; IBM Technical Disclosure Bulletin; vol. 23, No. 2, pp. 678-679; Jul. 1980.
Barozzi Gian P.
Horeschi Giancarlo
Burr Edgar S.
Tokyo Juki Industrial Co. Ltd.
Wiecking David A.
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