Hinge for thermoplastic material
US4397904A · kind A · utility
9Cited by
1References
2Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 13, 1981 |
| Grant date | Aug 9, 1983 |
| Priority date | — |
| Expiry date | Apr 13, 2001 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/2457
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
A hinge for thermoplastic material particularly suitable for loose-leaf binder covers is constructed by embedding an embossed welding die into the thermoplastic material to a depth less than the full height of the embossment so that no vertical lines are produced in the themoplastic by the longitudinal edges of the die. The resulting surface of the thermoplastic is a hinge containing indentations corresponding to the pattern of the embossed die, which permit the thermoplastic to be folded at the hinge area.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.