Neon tube support having molded spring and method of making the

Supports – Pipe or cable – Neon tube

Patent

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248 742, 267178, F16L 320

Patent

active

052577627

ABSTRACT:
A unitary helical coil spring assembly is inserted in a tubular body to form a neon tube support. The assembly is molded of plastic using a mold comprised of two planar blocks in each of which there are a series of axially spaced apart recesses configured to form half convolutions of a spring and there are projections having rounded ends projecting from between half convolution recesses on each mold block which interdigitate and project into the half convolution recesses in the opposite mold block when the planar surfaces are interfaced so the rounded ends cooperate to form a circular inside diameter of the spring when plastic is injected in the recesses.

REFERENCES:
patent: 2378426 (1948-09-01), Reinhart et al.
patent: 2456302 (1948-12-01), Mocnik
patent: 2545416 (1951-03-01), Staaf
patent: 3378426 (1968-04-01), Medney
patent: 4637492 (1987-01-01), Herr
patent: 4666109 (1987-05-01), Fallon et al.
patent: 4773633 (1988-09-01), Hinz et al.

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