Thermoformable foam with infrared receptors
US5981611A · kind A · utility
1Cited by
26References
12Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Nov 24, 1997 |
| Grant date | Nov 9, 1999 |
| Priority date | — |
| Expiry date | Nov 24, 2017 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/249986
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A plastic sheet capable of being shaped by a cold room temperature tool, said sheet being a semi-rigid thermoformable plastic foam doped with carbon black having a concentration within a range of 0.0000081 to 0.0081% by weight of the foam. And a method of forming a product from such sheet by heating it to its thermoforming temperature range by infrared (IR) heat and placing and compressing the sheet between mold parts of a cold tool, the IR heat preferably being generated by quartz lamp electric heaters.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.