Method and apparatus for preventing creases in thin webs

Details Method and apparatus for preventing creases in thin webs Method and apparatus for preventing creases in thin webs

1997-10-29

1999-11-09

Walsh, Donald P.

Advancing material of indeterminate length

Processes

By fluid current

226 21, 226 971, 2261961, B65H 2014

Patent

active

059797312

ABSTRACT:
Method and apparatus for removing temporary longitudinal wrinkles (29) from a thin or ultra-thin moving web (11) in a web conveyance machine by bending the web through preferably at least 90 degrees around a cylindrical small-radius air bar (13, 35, 39, 61, 63, 65, 73, 79) and for preventing permanent creases from forming in the web by disposing the air bar with the wrinkle-free web in close proximity to the surface of a contact roller (33, 53, 67, 71) and transferring the moving web across a gap (62) of preferably 1 mm or less between the air bar and the contact roller.

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patent: 4182472 (1980-01-01), Peekna
patent: 4200211 (1980-04-01), Yamagishi et al.
patent: 4605146 (1986-08-01), Petitjean
patent: 4700909 (1987-10-01), Lohrenz et al.

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