Device for tensioning a data carrier which is moved by feed trac

Details Device for tensioning a data carrier which is moved by feed trac Device for tensioning a data carrier which is moved by feed trac

1982-07-07

1984-01-31

Christian, Leonard D.

Advancing material of indeterminate length

Means to engage longitudinally spaced modifications in material

Pins on flexible belt or chain

226170, B65H 1738, G03B 130

Patent

active

044285191

ABSTRACT:
A device for tensioning a data carrier which is moved by feed tractors, such as a paper sheet moving past a printing station in a non-mechanical printer or copier in which the feed tractors consist of a toothed belt entrained about pairs of wheels, the teeth of the belt engaging perforations in the side margins of the data carrier, has a cam mounted on a shaft between the wheels in a feed tractor. The wheels are mounted on a guide block having a bearing element which acts as a cam follower so that by rotating the cam the wheels are synchronously displaced so as to suitably tension the data carrier in the printing station.

REFERENCES:
patent: 3859864 (1975-01-01), Offermann
patent: 4213551 (1980-08-01), Windele
patent: 4345708 (1982-08-01), Hubbard

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