Applicator for molten thermoplastic adhesives

Details Applicator for molten thermoplastic adhesives Applicator for molten thermoplastic adhesives

1974-10-02

1976-03-09

Reeves, Robert B.

Dispensing

With heating or cooling means

Cooling only

222334, 222380, B67D 546

Patent

active

039426874

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.

REFERENCES:
patent: 1563545 (1925-12-01), Blakeslee
patent: 2684806 (1954-07-01), McBean
patent: 2689075 (1954-09-01), Morton et al.
patent: 2778530 (1957-01-01), Sillars
patent: 2831214 (1958-04-01), Eyles et al.
patent: 3149753 (1964-09-01), Forsyth
patent: 3764045 (1973-10-01), Ornsteen
patent: 3768102 (1973-10-01), Kwan-Gett et al.
patent: 3826224 (1974-07-01), Baker et al.
patent: 3828986 (1974-08-01), Roth

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