Roller for supporting a web having axially slidable staves

Details Roller for supporting a web having axially slidable staves Roller for supporting a web having axially slidable staves

1991-10-31

1993-09-14

Stodola, Daniel P.

Advancing material of indeterminate length

By orbitally traveling material-engaging surface

With control or adjustment means

226190, 226 15, 492 36, 492 26, B65H 23038, B65H 2002

Patent

active

052441385

ABSTRACT:
A roller over which advances a web of material such as paper, photographic film or the like includes a plurality of staves organized in first and second arrays with the staves of the first array alternating with the staves of the second array to provide surfaces for supporting the web. The staves are each individually mounted on the roller by separate spring legs which center the staves. Flanges are located at the ends of the roller to position the web laterally. When the web obliquely approaches the axis of the roller so as to helically advance thereover, the staves sequentially and independently shift axially due to engagement with the helically advancing web. After the web leaves the roller, the stave that the web was most recently supported by returns under the bias of the spring legs to its central, unbiased position. In this way, damage to the edges of the web, due to engagement with the flanges, is minimized.

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