Apparatus for forming center-unwindable rolls of perforated plas

Details Apparatus for forming center-unwindable rolls of perforated plas Apparatus for forming center-unwindable rolls of perforated plas

1988-09-14

1989-08-08

Werner, David

Winding, tensioning, or guiding

Coil holder or support

Spool or core

242 741, 242 569, B65H 1810

Patent

active

048545201

ABSTRACT:
An apparatus is 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.

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patent: 4327877 (1982-05-01), Perini
patent: 4391415 (1983-07-01), Hollier

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