Molding
US4519569A · kind A · utility
14Cited by
19References
10Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Apr 5, 1984 |
| Grant date | May 28, 1985 |
| Priority date | — |
| Expiry date | Apr 5, 2004 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29L2031/565
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
For the molding of bottle caps having irregular lower boundaries, such as caps having depending tabs, the conventional mold has a core and a surrounding sleeve in which the core slides. This is modified by using a split sleeve which is maintained in close contact with the core during molding, but whose elements are freed to move outwardly away from the core when the mold begins to open. This solves the prior art problem of the galling of the contacting surfaces of sleeve and core.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.