Applicator for molten thermoplastic adhesives
US3942687A · kind A · utility
12Cited by
10References
11Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 2, 1974 |
| Grant date | Mar 9, 1976 |
| Priority date | — |
| Expiry date | Oct 2, 1994 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB05C5/02
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
An applicator by which small, discrete, uniform quantities of molten thermoplastic adhesive can be dispensed in rapid succession comprises a body having a heated inlet chamber, which hot melt enters under low pressure, and a pump chamber. A plunger in the pump chamber is reciprocated by a pneumatic motor. A charging stroke of the plunger draws hot melt out of the inlet chamber, across a check valve and into the pump chamber. The discharging stroke expels the hot melt across an outlet check valve and through an outlet orifice coaxial with the pump chamber.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.