Hot melt applicator having flexible retention element for storag

Details Hot melt applicator having flexible retention element for storag Hot melt applicator having flexible retention element for storag

1990-11-14

1992-04-21

Huppert, Michael S.

Dispensing

With heating or cooling means

Heating only

221279, 222389, B67D 562

Patent

active

051059878

ABSTRACT:
An applicator for dispensing hot melt adhesives has a receptacle for storing solid blocks of adhesive, along with a feeding mechanism having a movable arm for advancing a single block of adhesive toward a melting chamber. A coil spring element is connected to the arm and unwraps as the arm is advanced in order to retain any remaining blocks of adhesive in the receptacle. At the end of a dispensing operation, the spring exerts just enough force on the arm in a direction away from the melting chamber to relieve pressure against the advanced block, so that the tendency for unwanted molten material to drip from the applicator nozzle is reduced.

REFERENCES:
patent: 3744921 (1973-07-01), Weller et al.
patent: 4032046 (1977-06-01), Elliott et al.
patent: 4106668 (1978-08-01), Gebhardt et al.
patent: 4457457 (1984-07-01), Dziki
patent: 4523705 (1985-06-01), Belanger et al.
patent: 4664296 (1987-05-01), Dziki
patent: 4951846 (1990-08-01), Oster et al.
patent: 4974752 (1990-12-01), Sirek

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