Heat shrinking heat gun with fan-shaped nozzle with temperature and/or airflow variation along the nozzle
US6304720A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Aug 19, 1999 |
| Grant date | Oct 16, 2001 |
| Priority date | — |
| Expiry date | Aug 19, 2019 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29C2035/046
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A heat gun nozzle and a method of using the nozzle includes a fan-shaped or wing-shaped flow of air having a temperature and/or airflow variation along the nozzle. This provides for a variation in the shrink rate when the fan-or wing-shaped airflow is applied to heat shrink plastic film. Both symmetric and asymmetric embodiments of the heat gun nozzle have an inlet portion mountable on a conventional heat gun outlet and an outlet portion providing the desired fan-shaped heat air flow with a duct portion connecting the two. In preferred embodiments, the nozzle outlet can be concave or convex depending upon the contour of the surface which is to be covered. The present invention also relates to the method of using such a heat gun nozzle permitting a substantial reduction in the number of heat gun passes required to successfully heat shrink film onto a compound curved surface.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.