Advancing material of indeterminate length – By fluid current – And web storage
Patent
1980-02-11
1981-09-08
Taylor, Billy S.
Advancing material of indeterminate length
By fluid current
And web storage
226197, B65H 2324, B65H 2332, B65H 1732
Patent
active
042880157
ABSTRACT:
A contactless web turning guide comprises a guide member that extends across the web and curves arcuately along a direction in which the web moves. The web floats in proximity to the convex surface of the guide member on a film of air confined by means of elongated air nozzles around its periphery. A pair of elongated edge-jet outlets extends along each edge of the web, parallel to the web edges, from one to the other of said nozzles. One edge-jet outlet of each pair is spaced a small distance outwardly from its adjacent web edge, the other a small distance inwardly from that edge, and the two edge-jet outlets of each pair discharge air along said surface in the direction across the width of the web towards the other pair of edge-jet outlets. Such edge-jet outlets conserve energy required for pressure air generation while affording more stable web travel.
REFERENCES:
patent: 2753181 (1956-07-01), Amander
patent: 3385490 (1968-05-01), Malmgren et al.
patent: 3971496 (1976-07-01), Karsh
patent: 4131320 (1978-12-01), Volat et al.
patent: 4182472 (1980-01-01), Peekna
patent: 4197972 (1980-04-01), Daana
Nilles James E.
Taylor Billy S.
W. R. Grace & Co.
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