Device for improved control in the transport of edge-perforated

Details Device for improved control in the transport of edge-perforated Device for improved control in the transport of edge-perforated

1990-09-28

1992-01-14

Stodola, Daniel P.

Advancing material of indeterminate length

Means to engage longitudinally spaced modifications in material

Pins on flexible belt or chain

226 87, 226 86, 4006161, 4006163, B65H 2020

Patent

active

050802720

ABSTRACT:
A device for the feeding or advancement of an edgeperforated paper web (1) in a dot-matrix printer or the like includes a pair of drive belts (3) transversely spaced apart proximate opposite transverse edges of the web, each belt carrying on its upper surface (6) a series of pins (7) for releasable engagement with the edge-disposed web perforations (11). To provide an increase in friction between the paper web (1) and the drive belts (3) during transport of the web, and thereby assure enhanced accuracy and precision in operatively advancing the web, a plurality of upstanding or outwardly-protruding projections (17, 17a, 17b, 17c) are defined on the upper belt surface (6). These projections are located at least in the flat sections (16) of the belt between adjacently or successively-disposed ones of the pins (7) and, in another form of the invention, additionally at and coincident with the locations of the pins (7) which interrupt the transversely-oriented projections.

REFERENCES:
patent: 4394949 (1983-07-01), Gomi
patent: 4619389 (1986-10-01), Isobe
patent: 4844314 (1989-07-01), Wilson, III
patent: 4867591 (1989-09-01), Unuma
patent: 4874121 (1989-10-01), Rubinshtein

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