Cylindrical body and method and apparatus for making same
US5482663A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 29, 1993 |
| Grant date | Jan 9, 1996 |
| Priority date | — |
| Expiry date | Oct 29, 2013 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02W30/62
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
Apparatus for molding an elongated cylindrical object includes an elongated cylindrical mold. First and second closure plates are positioned within the mold and an elongated tube is suspended between the closure plates within the mold. A sliding piston is mounted over the elongated tube. Molten plastic is introduced into the mold between the piston and one of the closure plates so as to cause the piston to slide along the tube within the mold toward the opposite closure plate. When the mold is filled, the piston engages the opposite closure plate, and further introduction of molten plastic is stopped. This process produces an elongated plastic body having the tube embedded therein.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.