Sheet feeding device for an impact-type printer

Details Sheet feeding device for an impact-type printer Sheet feeding device for an impact-type printer

1984-11-28

1986-09-16

Burr, Edgar S.

Typewriting machines

Sheet or web

Including friction-feed means

226187, 271274, 4006363, B41J 1302

Patent

active

046119396

ABSTRACT:
A sheet feeding device in an impact-type printer, in which a leaf spring member is provided below a platen which is in confronting relationship with printing heads. The pressure rollers are rotatably mounted on the leaf spring member while a cam surface is defined on one of the guide shafts which mounts the printing mechanism for reciprocal movements along the platen. The leaf spring member at one end engages the cam surface so that it is flexibly displaced with respect to the platen in response to rotation of the guide shaft so as to move the pressure rollers towards or away from the platen.

REFERENCES:
patent: 1247456 (1917-11-01), Schwartz
patent: 2005450 (1935-06-01), Bower
"Spring Design to Positively Retain Axle for Pressure Roll System", by Gerhardt, IBM Technical Disclosure Bulletin, vol. 19, No. 2, p. 666, 7-1976.
"Platen Backup Rollers", by Ramirez et al, IBM Technical Disclosure Bulletin, vol. 25, No. 1, Jun. 1982.

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