Advancing material of indeterminate length – Processes – Involving registration of material
Patent
1975-09-08
1977-03-15
Saifer, Robert W.
Advancing material of indeterminate length
Processes
Involving registration of material
226 33, 226109, B65H 2524
Patent
active
040119750
ABSTRACT:
A web handling system is described for incrementally feeding a web, and preferably multiple webs, to a processing station. Each web is advanced to the processing station by a pair of web-feeding rollers. One motor drives all of the web-feeding roller pairs through respective clutch-brakes connected to each roller pair. Each web has index marks imprinted along its length at intervals corresponding to intervals at which it is desired to precisely register the web with the processing station. A first detecting means disposed along one of the web paths (or similar detecting means along another web path) initially detects an index mark on the web travelling that path to provide a signal which decelerates the motor and thus slows all of the web-feeding rollers and the webs. Second index mark detecting means, one for each web path, then detect the index marks on the respective associated webs as they now more slowly advance towards the processing station. When actuated, each second index mark detecting means produces a signal which disengages the clutch and applies the brake of the clutch-brake associated with the same web to independently stop each web. The second index mark detecting means are positioned relative to the processing station such that the desired portion of each web is registered with the processing station when the second index mark detecting means causes its associated web to independently stop. Since the web-feeding rollers are slowed prior to stopping and since each web is independently indexed with the processing station, each web is precisely registered with the processing station.
REFERENCES:
patent: 2850091 (1958-09-01), Carter
patent: 2947345 (1960-08-01), Schjeldahl
patent: 3797720 (1974-03-01), Gaudion
patent: 3816210 (1974-06-01), Aoko et al.
patent: 3848528 (1974-11-01), Seedorf
Packaging Industries, Inc.
Saifer Robert W.
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