Advancing material of indeterminate length – Means to engage longitudinally spaced modifications in material – With additional means to restrict material movement
Patent
1979-10-01
1981-05-26
Christian, Leonard D.
Advancing material of indeterminate length
Means to engage longitudinally spaced modifications in material
With additional means to restrict material movement
226 8, 226120, G03B 128, B65H 1794
Patent
active
042693420
ABSTRACT:
An array of dancer rollers are resiliently biased for engaging a plurality of webs in a take-up zone of a honeycomb machine. The dancer rollers engage each web and thrust it out of its plane of advance to maintain the webs under continuous tension loading as they are alternately advanced and halted during successive feeding and cutting cycles, respectively. A pair of index rollers engage the webs, pull them from supply rolls and feed them to a cyclic cutter in response to rotation of the index rollers. In this arrangement, the continuous drive rollers used in conventional web movement arrangements are eliminated with the webs being pulled from the supply roll intermittently and according to need by the index rollers. The dancer roller array stabilizes movement of the webs through the take-up zone by maintaining the webs under tension when the index rollers are stopped during the cutting cycle even though play-out of each web from its supply roll continues because of the inertia associated with the rotating mass of the supply roll. The magnitude of the thrusting force applied by the dancer rollers at each successive station is preferably less than the magnitude of the thrusting force applied at the preceding station. This graduated, yieldable thrusting arrangement eliminates backlash and rambling of the webs at the supply rolls and permits the index rollers to pull the webs from the supply rolls intermittently without slippage of the webs relative to the index rollers and without risk of exceeding the burst strength of the webs.
REFERENCES:
patent: 2957638 (1960-10-01), Schiller et al.
patent: 3176927 (1965-04-01), Irazoqui
patent: 3719802 (1973-03-01), Boyer
Christian Leonard D.
Griggs Dennis T.
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