Apparatus and process for forming center unwindable rolls of per

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

1987-08-06

1988-09-20

Werner, David

Winding, tensioning, or guiding

Coil holder or support

Spool or core

242 685, 242 72B, 242 74, B65H 1810

Patent

active

047719621

ABSTRACT:
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. g,31

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