Typewriting machines – Sheet or web – Including friction-feed means
Patent
1983-12-22
1985-03-05
Pieprz, William
Typewriting machines
Sheet or web
Including friction-feed means
400642, 400645, 400631, 400690, 271272, B41J 13076, B41J 1328, B41J 1310
Patent
active
045028044
ABSTRACT:
A paper feeding and guiding system for a printer with a flat platen has twin mating feed rollers fitted with "O" ring type friction elements cooperating with specially curved entrance and exit paper directing and guiding members which keep the paper or other record material flat against the platen face without the use of a bail or vacuum system. The axis of one feed roller is adjustable to alter the rolling radius of the "O" rings from one end of the feed rollers to the other to provide correction for skew feeding of the record material. The exit paper guide is vibration isolated from the platen bar and fitted with a noise control flap to close off the paper entrance cavity. The mechanism for disengaging the feed rollers for paper insertion is combined with a paper alignment guide which is projected into the path of the inserted paper to align the top edge for correct feeding and coincidence with the steps of a stepping motor drive which incrementally drives the feed rollers.
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Ex. 1-Models and Other Items to Which 3M is Given Title Under Article V.
Ex. 2-Photos of Model 1-W Printer.
Ex. 3-Photos of Model 2-W Printer.
Ex. 4-3 Sheets of Diagrams.
Alexander, "Positive Acoustic Seal", IBM Technical Disclosure Bulletin, vol. 23, No. 6, p. 2357, 11/80.
Hall William D.
Pieprz William
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