Winding – tensioning – or guiding – Coil holder or support – Spool or core
Patent
1976-03-02
1977-06-21
McCarthy, Edward J.
Winding, tensioning, or guiding
Coil holder or support
Spool or core
242 683, B21C 4700, B65H 1702
Patent
active
040306810
ABSTRACT:
A winder for plastic film in the absence of a winding core features equalized air lubrication of the wound roll, throughout its axial removal from the arbor. In the preferred embodiment in which a pair of aligned arbors move oppositely for stripping, means are provided for maintaining pressurized air at the roll-engaged support surfaces of both arbors until the arbors disengage the opposite ends of the roll. The winder has: restraints to hold the roll in position axially to ensure balanced air lubrication of the arbors during the stripping movement; means delivering the air adjacent the inner ends of the arbors, from which the air proceeds axially outwardly along both arbor surfaces to the ends of the roll; dependent driving of the arbors during the stripping motion; formations at the outer ends of the arbors engaged by axial drive devices; drive means receiving the end formations during indexing about a central major axis, to apply axial stripping and subsequent axial return forces to the arbors, releasing the arbors during subsequent indexing motion; axially extending flats on each of the arbors engaged by rollers in supporting and driving relation, the flats preferably extending to the inner ends of the arbors to ensure alignment with respective rollers; means for displacing a carrier for the rollers radially to cause the rollers to tightly engage the arbor, preferably comprising wedge formations responsive to axial force to displace the carrier radially; a circular friction surface drive for the carrier, and via the rollers mounted on the carrier, for the arbors; a piston urged by air pressure against the arbor end and a relief valve operable for admitting air through the piston when the piston is engaged upon the arbor; and a tucking means tucking the edge of film about a pair of arbors to initiate formation of the roll.
REFERENCES:
patent: 3042335 (1962-07-01), Ensign
patent: 3695542 (1972-10-01), Briggs
patent: 3733035 (1973-05-01), Schott
patent: 3776070 (1973-12-01), Stoffels
patent: 3802639 (1974-04-01), Dowd
Gloucester Engineering Co. Inc.
McCarthy Edward J.
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