Pressurized dispenser for aqueous emulsion paints

Details Pressurized dispenser for aqueous emulsion paints Pressurized dispenser for aqueous emulsion paints

Filed on

1975-01-14

Date issued

1977-11-01

Examiner

Phynes, Lucille M.

Patent Class

Dispensing

SubClass

Collapsible wall-type container

SubSubClass

With wall-collapsing means

Other Related Categories

22240212, 260 296MM, B65D 3528

Type

Patent

Status

active

Patent number

040562131

Description

ABSTRACT:
The invention relates to an improved pressurized dispenser for aqueous emulsion paints whose vehicle consists of a major proportion of water and a minor proportion of an acrylic polymer or polyvinyl acetate-acrylic copolymer, the emulsion being discharged as a fine spray but without foaming and without clogging of the nozzle orifice by dried paint even after repeated fractional discharges. The paint is contained in a collapsible piston within the pressurized container and the stream of paint discharging upon opening of the valve of the container is broken up by a mechanical breaker before being discharged through the nozzle in the form of a fine spray devoid of propellant, the latter being contained under pressure between the piston and the wall of the container. Means are provided in the form of a cap for the nozzle so constructed so as to reduce or substantially eliminate the space about the nozzle after use of portions of the contents of the package to prevent drying out of any paint adhering to the nozzle and thereby clogging the nozzle.

REFERENCES:
patent: 2953284 (1960-09-01), Prussin et al.
patent: 3370024 (1968-02-01), Grasko et al.
patent: 3488308 (1970-01-01), Colbert et al.
Paint Industry Processing & Materials Manual, (1966), RCH Publications, New Kingston, Pa., p. 50.

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