Paper tractor

Details Paper tractor Paper tractor

1985-05-01

1986-10-28

Watkins, Donald

Advancing material of indeterminate length

Means to engage longitudinally spaced modifications in material

Rotating sprocket

226 82, B65H 2022

Patent

active

046193898

ABSTRACT:
A paper tractor feeds print paper along the outer peripheral surface of a platen with sprocket pins fitted in feed holes in the print paper. The paper tractor device which includes ring pin tractors each composed of a wheel having the sprocket pins on its outer periphery and a gear integral with the wheel. The ring pin tractors are slidable over the outer peripheral surface of the platen in intimate contact therewith. The ring pin tractors are rotated through the gears thereof in the same direction at the same speed as the platen. The paper tractor can feed print paper of various widths.

REFERENCES:
patent: 3448906 (1969-06-01), Walsh et al.
patent: 3534684 (1970-10-01), Rupp
patent: 3838804 (1974-06-01), Bonafino
patent: 4358039 (1982-11-01), Buzzell
patent: 4421262 (1983-12-01), Chida et al.
The Patent Office Japanese Covernment, p. 3 M 32, Kokai-No. 55-87585.

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