Vacuum platen for sharp bends
US4877437A · kind A · utility
17Cited by
3References
8Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Apr 29, 1988 |
| Grant date | Oct 31, 1989 |
| Priority date | — |
| Expiry date | Apr 29, 2008 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC03B23/03
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
Apparatus (10) for bending glass sheets (12) disclosed provides press bending between a shaping surface (16), and a press ring (26) of a complementary shape. The apparatus (10) utilizes vacuum drawn through vacuum chambers (22, 30) and thereby on the shaping surface (16), to control the bending and avoid negative curvature associated with press bending sharp bends into glass sheets (12).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.