Paper feed system for a typewriter or the like

Details Paper feed system for a typewriter or the like Paper feed system for a typewriter or the like

1979-09-21

1981-10-27

Pieprz, William

Typewriting machines

Sheet or web

Including friction-feed means

400506, 271274, B41J 13076, B41J 13048

Patent

active

042970458

ABSTRACT:
A paper feed system for a typewriter has its rear feed rollers formed to have minimum shingling and prevent treeing when a plurality of sheets of paper is fed between the platen and the rear feed rollers by rotation of the platen. Each of the rear feed rollers includes an annular outer portion, which is formed of an elastomeric material having a hardness of 30 to 35 Shore A durometer, supported on a hub, which is non-flexible so as to be relatively rigid, having a pair of flanges on opposite sides of the annular outer portion. Each of the annular outer portions has its thickness equal to or less than its width with the spacing between adjacent annular outer portions being greater than the width of each of the annular outer portions.

REFERENCES:
patent: 1242343 (1917-10-01), Gillespie
patent: 2052566 (1936-09-01), Haines
patent: 2233955 (1941-03-01), Miller
patent: 2328624 (1943-09-01), Dodge
patent: 2356842 (1944-08-01), Helmond
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patent: 3749221 (1973-07-01), Busch
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patent: 3840223 (1974-10-01), Nakata
patent: 3929327 (1975-12-01), Olson
patent: 3988984 (1976-11-01), Lindelov et al.
Jenny et al. "Paper Handling Apparatus . . . " IBM Tech. discl. Bulletin vol. 20 No. 12, p. 5221, 05/78.

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