Apparatus and method for manufacturing gaskets
US6540852B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 21, 1998 |
| Grant date | Apr 1, 2003 |
| Priority date | — |
| Expiry date | Jul 21, 2018 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16J15/125
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
An apparatus and methods of manufacturing seamless gaskets using expanded intercalated graphite worms, in which an annular die cavity has a central column with a charge inlet in a perimeter wall. Expanded intercalated graphite worms communicate from a source through the charge inlet in the annular die cavity for depositing a charge of expanded intercalated graphite worms within the die cavity. An upper pusher is movable from a first position distally spaced from an open end of the die cavity to a second position within the die cavity for compressing a first charge of expanded intercalated graphite worms. A lower pusher is movable from a first position to a second position during the compressing of the first charge of expanded intercalated graphite worms in the die. The upper pusher causes the lower pusher to move to the second position, so that a second charge of expanded intercalated graphite worms is received in substantially the same volume as the first charge. The upper pusher then compresses the second charge to form a seamless gasket.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.