Sheet-feed tractor with resilient spring clamping subassembly

Advancing material of indeterminate length – Means to engage longitudinally spaced modifications in material – Pins on flexible belt or chain

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Details

4006161, G03B 130

Patent

active

044718969

ABSTRACT:
A tractor for a web feeding assembly having spaced support and drive shafts has a chassis providing a pair of apertures extending therethrough and a belt extending thereabout. A drive pulley mounted in one of the chassis apertures is engaged with the driven surface of the belt and has an aperture therethrough receiving the drive shaft. A convexly arcuate belt support surface cooperates with the drive pulley to define the web drive path for the belt therebetween. A resilient spring clamp is mounted adjacent the other aperture in the chassis and releasably clamps the tractor on the support shaft. The mounting desirably permits the clamp to rotate about the axis of the aperture receiving the support shaft.

REFERENCES:
patent: 3565470 (1971-02-01), Nichol et al.
patent: 3693856 (1972-09-01), Funk
patent: 3930601 (1976-01-01), Masuda
patent: 3941288 (1976-03-01), Wanat
patent: 4129239 (1978-12-01), Hubbard
patent: 4130230 (1978-12-01), Seitz
patent: 4159794 (1979-07-01), Seitz
patent: 4194660 (1980-03-01), Seitz
patent: 4199091 (1980-04-01), Hubbard
patent: 4214691 (1980-07-01), Van Namen
patent: 4315585 (1982-02-01), Seitz
patent: 4344715 (1982-08-01), Van Horne et al.
patent: 4389007 (1983-06-01), Seitz

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