Die system for thermoforming thermoformable sheet material
US5162124A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 4, 1991 |
| Grant date | Nov 10, 1992 |
| Priority date | — |
| Expiry date | Dec 4, 2011 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01H2219/062
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
Apparatus is disclosed for thermoforming a thermoformable sheet material into a predetermined thermoformed shape. A graphic display is provided upon one side of the thermoformable sheet material, and the apparatus includes first and second die members between which the thermoformable sheet material is secured. A forming cavity is defined within the first die member for accommodating a portion of the thermoformable sheet material when the thermoformable sheet material portion is forced into the forming cavity, and the second die member is provided with a heating plate for heating the thermoformable sheet material to a predetermined temperature in preparation for the thermoforming formation of the thermoformable sheet material into the thermoformed shape within the forming cavity of the first die member. The heating plate includes a recessed portion which is positionally aligned with the graphic display portion of the thermoformable sheet material so as to effectively heat insulate the graphic display portion of the thermoformable sheet material and thereby maintain the graphic display portion of the thermoformable sheet material at a second temperature level which is less than the p…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.