Method and apparatus for joining polymeric substrates such as vi

Details Method and apparatus for joining polymeric substrates such as vi Method and apparatus for joining polymeric substrates such as vi

1989-02-28

1990-11-20

Wityshyn, Michael

Adhesive bonding and miscellaneous chemical manufacture

Methods

Surface bonding and/or assembly therefor

1563042, 1563046, 1563096, 1563099, 156358, 156359, 156360, 156366, 156378, 156499, B29C 6520

Patent

active

049716395

ABSTRACT:
A method and apparatus are provided for welding vinyl window and door frames. The apparatus includes a counting circuit or the like for measuring the time taken for burning off a selected length of a thermoplastic frame member. This time can be used to calculate a sufficient or optimal period for performing a heating or plastification step. Once the ends of the frame members are properly heated (plastified), they are fused by urging them towards each other. The fused members are then cooled for a period of time which also corresponds to the time required for burn-off. The apparatus further includes a heating plate which is pivotable between an operating position and a retracted position. The heating plate is also movable so that different surface portions can be used during burn-off and heating phases.

REFERENCES:
patent: 3253972 (1966-05-01), Huddleston
patent: 3853655 (1974-12-01), Pecha
patent: 4008118 (1977-02-01), Wesebaum et al.
patent: 4640732 (1987-02-01), Stafford
U-R-B-A-N AKS 4000 Brochure dated Jul., 1982.
U-R-B-A-N AKS 4210 Brochure dated 7-84.
U-R-B-A-N AKS 3500 AKS 3510 Brochure dated 8-84.
U-R-B-A-N AKS 4010 AKS 4000 Brochure dated 2-85.

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