Tractor having an endless belt with driving pins

Details Tractor having an endless belt with driving pins Tractor having an endless belt with driving pins

1987-02-27

1988-05-03

Burr, Edgar S.

Typewriting machines

Sheet or web

For feeding web record-medium

B41J 1126

Patent

active

047416416

ABSTRACT:
A pair of pulleys are rotatably provided between a pair of long frames in the neighborhood of both ends thereof. An endless belt is put over the pulleys, wherein the teeth which mesh with the pulleys are provided on the inner surface of the endless belt. A row of pins which fit into the perforations in a document is provided in the outer feeding surface of the endless belt. A groove extending in the longitudinal direction of the belt is formed in the central portion of the teeth trains of the belt. A rib projecting from the upper surface on which the belt slides and extending in the feeding direction of the document is formed in one of the frames. Since the belt moves in a state in which the rib is fitted into the groove of the belt, the belt runs without deviating from the line which connects between the pulleys.

REFERENCES:
patent: 3209972 (1965-10-01), Benbow et al.
patent: 3392893 (1968-07-01), Bennett et al.
patent: 3825162 (1974-04-01), Hubbard
patent: 4079633 (1978-03-01), Cheema et al.
patent: 4453660 (1984-06-01), Cornell et al.
patent: 4614287 (1986-09-01), Ueno et al.

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