Method of making a dispensing head, and the corresponding head a

Details Method of making a dispensing head, and the corresponding head a Method of making a dispensing head, and the corresponding head a

1990-10-31

1993-02-02

Kashnikow, Andres

Dispensing

With discharge assistant

With material supply container and discharge assistant with...

2224021, B67D 540

Patent

active

051831880

ABSTRACT:
The invention relates to a method of making a dispensing head comprising a rigid annular dome made of plastics and, above the dome, a dispensing valve or a pump, the valve or pump having an annular fixing shoulder, the circumference of which is made at least externally of plastics, the lower end of the dome carrying an annular flange for fixing over a can body. In the method disclosed the valve or pump is disposed between tools which tightly grip the fixing shoulder and provide play which limits its heating during a molding operation. Annular tools are provided, forming a circular gap with the tools that grip the fixing shoulder, the gap closing over the shoulder and forming the geometry of the dome and its annular fixing flange. Molten plastics are injected into the annular gap through one or more injection orifices, the molded dispensing head cooled and demolded. The invention also relates to the corresponding preassembled heads and dispensers using them. The invention can be utilized in packaging of liquid or cream products in aerosol or pump type dispensers.

REFERENCES:
patent: 2773722 (1956-12-01), Abplanalp
patent: 2937409 (1960-05-01), Cole
patent: 3064310 (1962-11-01), Cooprider
patent: 3120907 (1964-02-01), Harnage
patent: 3361078 (1968-01-01), Cooprider
patent: 3680187 (1972-08-01), Murray
patent: 4010052 (1974-09-01), Edwards
patent: 4071279 (1978-01-01), Chung
patent: 4297313 (1981-10-01), Duckstein
patent: 4434915 (1984-03-01), Kirk, Jr.
patent: 5031384 (1991-07-01), Rebeyrolle et al.

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