Plastic pipe bending jig

Details Plastic pipe bending jig Plastic pipe bending jig

1977-10-13

1979-05-29

Spicer, Jr., Robert L.

Plastic article or earthenware shaping or treating: apparatus

Preform reshaping or resizing means: or vulcanizing means...

Rod or tubular preform

72369, 72384, 425393, B29C 1702

Patent

active

041565886

ABSTRACT:
A process and jig for field bending relatively large diameter plastic pipe, the jig being to guide the pipe at the point of tangency adjacent the bend after the pipe is heated and bent to form a smooth curvature to the desired radius and degree of bend as determined by the jig. The jig includes a two-piece spreader tube and a right and left hand guide, each adjustable in width, angle and spacing. The guides are U-shape and extend beneath the spreader tube so that the pipe may be placed on a flat horizontal surface. Each guide is provided with a protractor, one of which includes an offset scale so that offsets or curves with generally parallel tangents may be formed. The spreader tube includes a scale to ascertain the chord in terms of the radius for given degrees of bend.

REFERENCES:
patent: 3861847 (1975-01-01), Barnett
patent: 3890079 (1975-06-01), Slater
patent: 4080141 (1978-03-01), Usui

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