Hot melt multi-section hose heating system
US4352007A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 22, 1980 |
| Grant date | Sep 28, 1982 |
| Priority date | — |
| Expiry date | Oct 22, 2000 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05B3/58
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A heating system is disclosed for a hot melt hose having multiple physically and thermally interchangeable series-connected heated hose sections wherein different hose sections exhibit different electrical power requirements per unit length. The multiple sections of the hose are physically and electrically interconnected end-to-end between a pressurized hot melt source and a hot melt dispenser, such as a hand-held gun, having a trigger-controlled valve for regulating the flow of hot melt from the gun. Each of the hose sections includes an inner, fluid impervious, chemically inert tube, preferably fabricated of tetrafluoroethylene; an electrically conductive multi-strand braided sheath snugly embracing the exterior surface of the inner tube and in intimate heat transfer contact therewith for supplying strength and heat to the tube; and an outer sheath of thermal insulating material surrounding the intermediate braided sheath for minimizing heat loss to the environment. At least two of the hose sections have outer thermal insulating layers exhibiting different heat loss per unit length and associated electrically conductive braided sheaths of substantially equal strength and flexibil…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.