Hot melt mix applicator with electrically heated hose and wand with temperature-controlled electric generator
US5832178A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 25, 1996 |
| Grant date | Nov 3, 1998 |
| Priority date | — |
| Expiry date | Jun 25, 2016 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S388/934
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A method and heating system for a hose and dispenser wand of a hot melt mix applicator uses a three phase heating element powered by a generator to heat the hose and wand to maintain hot melt mix material within the hose and wand in a flowable state. To selectively energize the generator to control heat input, the heating system has (1) a controller in communication with a temperature sensor carried by the hose or wand, and (2) an output in communication with a generator control input. The generator control input enables operation of the generator to be controlled by the controller for controlling heating of the hose and wand. The heating element is a cord having a first wire receiving a phase of the three phase current, a second wire receiving another phase of the current, and a third wire receiving another phase of the current, with the cord being wrapped about the hose and wand in a helical configuration. The generator preferably is a vehicle alternator modified so that it outputs three phase electrical power without requiring any voltage or current regulation. In a preferred method, the controller energizes the generator when the sensed temperature of the hot melt mix falls to …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.