Thermoformer for forming and heat bonding a thermoplastic sheet to a substrate
US6648043B1 · kind B1 · utility
6Cited by
7References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 22, 2000 |
| Grant date | Nov 18, 2003 |
| Priority date | — |
| Expiry date | Apr 11, 2021 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T156/1746
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A thermoforming apparatus for forming sheets of sheet plastic onto a substrate in which a retractable substrate heater is able to be positioned over a substrate loaded into the press and energized while a plastic sheet is being heated in an oven included in the thermoformer apparatus. The plastic sheets are cut from a strip pulled from a roll of sheet material, the roll supported for side to side movement and driven by a servomotor responsive to error signals generated by a strip edge sensor to compensate for wandering of a strip edge to thereby insure accurate location of plastic sheets cut from the unwound strip.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.