发明名称 Roll winder
摘要 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.
申请公布号 US4030681(A) 申请公布日期 1977.06.21
申请号 US19760663211 申请日期 1976.03.02
申请人 GLOUCESTER ENGINEERING CO. INC. 发明人 SCHOTT, JR., CHARLES M.
分类号 B65H19/22;(IPC1-7):B21C47/00;B65H17/02 主分类号 B65H19/22
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