Web apparatus with variable repeat interval

Details Web apparatus with variable repeat interval Web apparatus with variable repeat interval

1984-11-26

1985-10-08

Christian, Leonard D.

Advancing material of indeterminate length

By intermittent material-mover

Adjustable feeder

226143, 101223, 101228, B65H 1722, B14F 1304

Patent

active

045455180

ABSTRACT:
The delineating cylinder of the web apparatus of this invention has a cutout around one-third of its periphery to be out of contact with the web through an idle phase of its rotational cycle during which a web portion at that cylinder is drawn rearward through an adjustably variable distance. Through the remainder of that cycle that web portion is moved forward in step with delineating cylinder rotation. Upstream and downstream from that cylinder are feed roller pairs, driven through a variable ratio planetray transmission, whereby other portions of the web are moved forward steadily at the rate of one repeat interval length per delineating cycle. Between each pair of feed rollers and the delineating cylinder is a control roller around which there is a loop of web. Each control roller is moved bodily in an orbit whereby its loop is alternately increased and permitted to decrease. The radius of its orbit is adjustably variable for variation of repeat interval length. The orbital cycle of each control roller coincides with the delineating cylinder cycle, but orbital speed of each control roller changes from point to point in its orbit in accordance with the profile of a stationary cam track.

REFERENCES:
patent: 2758541 (1956-08-01), Tison
patent: 2845021 (1958-07-01), Pinckert et al.
patent: 3756149 (1973-09-01), Bishop
patent: 4153191 (1979-05-01), Bishop
patent: 4416200 (1983-11-01), Yon

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