Plastic article or earthenware shaping or treating: apparatus – Distinct means to feed – support or manipulate preform stock... – Endless surface means to shape fluent material
Patent
1984-08-06
1986-12-02
Weston, Caleb
Plastic article or earthenware shaping or treating: apparatus
Distinct means to feed, support or manipulate preform stock...
Endless surface means to shape fluent material
156500, 156503, 156507, 156512, 220 5R, 220 71, 425113, 425308, B29C 5300
Patent
active
046261869
ABSTRACT:
A method and apparatus for forming a drum handling ring having an inverted frustoconical geometry to facilitate engagement of a conventional parrot beak gripper with the ring. The end of an advancing, straight strip of heated thermoplastic material, continuously provided by an extrusion head, is fed at a first location to the circular periphery of a continuously rotating, large diameter turntable where the strip is clamped thereto and then cooled so that the clamped portion of the strip thermally sets into an arcuate shape corresponding to the periphery of the turntable. At a second location diametrically opposed to the first, the now arcuate end portion of the strip is unclamped and guided away from the turntable periphery to a cutting station where the continuously advancing strip is cut into arcuate pieces each having an arc length generally corresponding to the desired circumference of a drum handling ring. In a separate operation, the ends of each arcuate piece are butted together and then thermally welded to provide an inverted frustoconical drum handling ring having a grippable "toe" portion spaced radially outwardly from the sidewall of the associated drum to facilitate gripping thereof.
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Fow, Jr. Louis F.
Hofstetter Don R.
Mont-Pac, Inc.
Weston Caleb
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