Heater assembly for blow molding plastic preforms
US6361301B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 21, 2000 |
| Grant date | Mar 26, 2002 |
| Priority date | — |
| Expiry date | Feb 21, 2020 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29C2949/0715
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A heater assembly (20) for heating blow molding plastic preforms (14) includes a plurality of elongated heaters (26) mounted by a housing (24) and extending along a path of conveyance of the preforms in a parallel relationship to each other, and each heater includes an elongated parabolic reflector (44) that reflects radiation from an adjacent elongated bulb (36) to irradiate the conveyed preforms. The heater assembly (20) also includes a quartz window (58) located between the elongated heaters (26) and the conveyed preforms (14) to transmit infrared radiation while blocking longer wavelength radiation so as to provide uniform heating of the conveyed preforms.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.