Hinge for thermoplastic material
US4435464A · kind A · utility
9Cited by
2References
2Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 2, 1983 |
| Grant date | Mar 6, 1984 |
| Priority date | — |
| Expiry date | May 2, 2003 |
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 thermoplastic 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.