Method for stacking billets and thermoforming
US4790972A · kind A · utility
14Cited by
12References
4Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | May 16, 1986 |
| Grant date | Dec 13, 1988 |
| Priority date | — |
| Expiry date | May 16, 2006 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S264/57
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
This invention encompasses a process for making containers from multiple stacked billets which comprises the steps of preparing thermoplastic sheet, cutting or punching billets from the sheet, stacking two or more of the billets together, heating the stacked billets or the mating surfaces of the billets to or above the fusion temperature of the mating surfaces, where the billets adhere to each other, and thermoforming the stacked billets into containers.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.