Bending process

B - Operations – Transporting – 29 – C

Patent

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18/1053

B29C 53/28 (2006.01) B29B 13/02 (2006.01)

Patent

CA 1092320

Abstract of the Disclosure The Specification describes a process for bending monoaxially or biaxially stretched sheets of thermoplastic resin which comprises the steps of: a) heating one surface of a part of a monoaxially or biaxially stretched thermoplastic synthetic resin sheet to a temperature above the softening temperature of the said resin whilst the temperature of the opposite surface of the said part of the sheet remains below the softening temperature of the said resin, the said part of the sheet extending across between two opposite edges of the sheet, and, in the case of monoaxially stretched sheets of resin, extending in a direction transverse to the direction in which the sheet has been stretched but not extending the entire distance between opposite edges of the sheet in the direction in which the sheet has been stretched; b) bending the said part of the sheet or allowing the said part of the sheet to bend, bending in the case of monoaxially stretched sheets providing curvature in the direction in which the sheet has been stretched; and c) cooling the said part of the sheet to a temperature below the softening temperature of the resin.

258598

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