Method for manufacturing a flattened cylindrical film consisting

Details Method for manufacturing a flattened cylindrical film consisting Method for manufacturing a flattened cylindrical film consisting

1976-02-26

1977-09-13

Van Horn, Charles E.

Adhesive bonding and miscellaneous chemical manufacture

Methods

Surface bonding and/or assembly therefor

156244, 156309, 264210R, 264289, B29C 2702

Patent

active

040479978

ABSTRACT:
This invention relates to a method and apparatus for manufacturing a multi-layer flattened cylindrical film of thermoplastic resin stretched its layers crosswisely, the outer one being stretched lengthwise, the inner one transversely, more particularly, relates to a method and apparatus for manufacturing a multi-layered cylindrical film of thermoplastic resin stretched its layers crosswise, the outer one being stretched lengthwise having a larger diameter than the inner one which is stretched transversely being expanded by means of an inner mandrel so as to be stuck to the outer layer through an intermediate layer having a low melting point.

REFERENCES:
patent: 3322613 (1967-05-01), Rasmussan
patent: 3539666 (1970-10-01), Schirmer
patent: 3726743 (1973-04-01), Reifenhauser et al.
patent: 3754063 (1973-08-01), Schirmer
patent: 3926706 (1975-12-01), Rahlfs et al.
patent: 3953557 (1976-04-01), Brax et al.

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