Sprue bushing with automatically activated gate
US4828480A · kind A · utility
11Cited by
3References
8Claims
0Family size
Inventor
Key dates
| Filing date | Feb 16, 1988 |
| Grant date | May 9, 1989 |
| Priority date | — |
| Expiry date | Feb 16, 2008 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S425/005
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
An injection mold having a fixed mold member and a movable mold member, a sprue bushing assembly mounted in the fixed member containing an automatically actuated gate slidably mounted therein for opening and closing the sprue hole in response to the positioning of the mold members.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.