Patent
1976-11-29
1978-08-15
Coan, James F.
B31D 504
Patent
active
041063988
ABSTRACT:
A method and apparatus for transversely folding a continuous tubular sleeve onto a mandrel are disclosed. The sleeve of thermoplastic material is fed onto a diametrically collapsible mandrel and folded into concentric layers from one end of the mandrel toward the other until the desired number of concentric layers are formed.
REFERENCES:
patent: 2696768 (1954-12-01), Mickey et al.
patent: 3412523 (1968-11-01), Raymond et al.
patent: 3529401 (1970-09-01), Sartore et al.
patent: 3868895 (1975-03-01), Hart et al.
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