Mold for producing a neon tube support having a molded spring
US5122052A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 9, 1991 |
| Grant date | Jun 16, 1992 |
| Priority date | — |
| Expiry date | Oct 9, 2011 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S425/058
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.