Hot melt dispenser and method of making its melt body
US4014464A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 9, 1975 |
| Grant date | Mar 29, 1977 |
| Priority date | — |
| Expiry date | Dec 9, 1995 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29B13/022
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
In a dispenser or applicator of heat softenable material, a melt body has a generally conical melting chamber extending between an inlet and a relatively smaller outlet passage, at least one by-pass interconnected to the melting chamber by a plurality of spaced, radial bores arranged to conduct hot melt from successive outer "layers" of the material as it is being progressively softened, reduced and liquefied in the chamber for flowing to the outlet, and at least one axial auxiliary channel extending between the outlet and the smaller end of the melting chamber for conducting the central core of the last-to-be melted end portion of the material. Preferably the body has a pair of by-passes, a pair of auxiliary channels, encloses a heater, and is of configuration facilitating its economical construction in one piece. The method aspect features casting or otherwise providing a one-piece melt body of a metal, such as an aluminum alloy, to provide a main conical melt chamber and a cavity for a heater, boring one or more by-passes in the casting from its outlet and toward its inlet end and substantially parallel and adjacent to at least a portion of the outer wall of the melt chamber, bo…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.