Method of molding gutter fittings

Details Method of molding gutter fittings Method of molding gutter fittings

1978-07-06

1982-04-27

Derrington, James H.

Plastic and nonmetallic article shaping or treating: processes

Mechanical shaping or molding to form or reform shaped article

Shaping against forming surface

249 63, 249 64, 249180, 264334, 405121, B29C 700

Patent

active

043270514

ABSTRACT:
A plastics gutter fitting (8, 11) has at least one transverse groove (10,17) receiving a sealing strip (16) and an inwardly turned clipping nib (9,15) extending across at least one end of a said transverse groove (10,17). The fitting is molded using a three part core of which two outer parts (4,4') can be moved convergently relative to a central part (3) for releasing a molding (8) therefrom. This molding method enables the reentrant where a clipping nib (9,15) extends across an end of a transverse groove (10,17) to be molded integrally in the fitting.

REFERENCES:
patent: 2948031 (1960-08-01), Webb
patent: 3339242 (1967-09-01), Lamb
patent: 3373460 (1968-03-01), Ladney
patent: 3865529 (1975-02-01), Guzzo
patent: 4019711 (1977-04-01), Altenhof et al.
patent: 4136150 (1979-01-01), Darnall

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