Apparatus and process for forming center unwindable rolls of...

Details Apparatus and process for forming center unwindable rolls of... Apparatus and process for forming center unwindable rolls of...

B - Operations, Transporting

65

H

242/44

B65H 18/10 (2006.01)

Patent

CA 1282765

F-3772 APPARATUS AND PROCESS FOR FORMING CENTER-UNWINDABLE ROLLS OF PERFORATED PLASTIC FILM ABSTRACT OF THE DISCLOSURE An apparatus and a method are disclosed for winding strips or tubes of plastic film into center-unwindable rolls having a diameter of at least about 3 inches and for unloading the wound rolls without telescoping thereof. Bare expandable winding shafts are provided which comprise a fixed vacuum leaf and a plurality of movable leaves controlled by an elongated air bladder, the contracted diameter being at least about one-quarter inch less than the expanded diameter. Each leaf also has an outer surface having a selected slipperiness toward the film surface.

521216

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