Radiant heater apparatus for post-forming thin acrylic sheets
US6328559A · kind A · utility
Inventors
Key dates
| Filing date | Jul 9, 1999 |
| Grant date | Dec 11, 2001 |
| Priority date | — |
| Expiry date | Jul 9, 2019 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29K2033/08
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A method and apparatus for post-forming an acrylic sheet using radiant heat are disclosed. The heating apparatus includes radiant heating tubes mounted to a frame and positioned in a heating plane. A support platform is also mounted to the frame. A heating area is defined between the heating tubes and the support platform. The heating area is substantially exposed to the atmosphere, allowing unheated air to exchange with the heated air in the heating area. To use the apparatus, combustible gas is ignited and passed through the radiant heating tubes, such that heat radiates from the tubes to the heating area. An acrylic sheet is placed on the support surface such that the unfinished side of the sheet faces the radiant heating tubes. The entire sheet is positioned in the heating area for a selected period of time. The heated sheet is then positioned in a mold until almost cool. At that point, the sheet is removed and allowed to cool completely.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.