Hot melt adhesive foam pump system

Details Hot melt adhesive foam pump system Hot melt adhesive foam pump system

1978-02-01

1980-04-29

Scherbel, David A.

Dispensing

With material treatment or conditioning means

222255, 222318, 417250, 417253, 417428, 418 9, 418 15, F04C 114, F04C 1504

Patent

active

042002079

ABSTRACT:
A hot melt adhesive foam pump system having a first stage pump that meters molten hot melt adhesive into a second stage pump, which in turn mixes gas under pressure into the adhesive so that the gas is driven into solution with the adhesive at an adjustably controllable ratio. The pump is insensitive to changes in adhesive viscosity and pump speed, and provides uniformity of foam density and output flow rate when the adhesive is ejected from a dispenser connected to the pump.

REFERENCES:
patent: 2918009 (1959-12-01), Crevoisier
patent: 3119339 (1964-01-01), Clarke et al.
patent: 3628893 (1971-12-01), Carpigiani
patent: 3964645 (1976-06-01), Scholl
patent: 4009974 (1977-03-01), Scholl
patent: 4059466 (1977-11-01), Scholl et al.
patent: 4059714 (1977-11-01), Scholl et al.

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