Prc De Soto International, Inc.

Paul Kuchinski

Oscar Santillan

Goldi Singh

Ralph Roppo

Sealant cartridge press fixtures are disclosed. The fixtures include a bracket comprising first and second side arms that receive a sealant cartridge therebetween. A transverse support bar connected to the first and second side arm is attached to a sealant filling nozzle. An air pressure cylinder mounted on the bracket includes a reciprocating piston rod that contacts and deforms a sidewall of the sealant cartridge at the beginning of a filling operation to allow trapped air to escape from the cartridge. An empty sealant cartridge having a slidable plunger therein is mounted at its front end on the sealant filling nozzle. The sealant is initially dispensed into the cartridge in the space between the front end of the cartridge and the plunger. While pressing and deforming the sidewall, it temporarily creates a gap between an interior surface of the sidewall and a plunger. The gap allows unwanted trapped air to escape from the sealant cartridge.

Sealant cartridge air release apparatus and methods

Sealant dispensing cartridge assemblies including radially expandable collets are disclosed. A plunger head assembly includes a ram head attached to a plunger rod. As the plunger rod is advanced into the sealant cartridge, the ram head presses against a rear side of a movable plunger against an opposing force created by a sealant contained in the cartridge on a front side of the plunger. As the plunger rod is further advanced, the collet contacts the ram head and radially expands against the inner sidewall of the plunger. The resulting radial force presses the sidewall of the plunger against the inner surface of the cartridge to thereby reduce or prevent unwanted leakage of the sealant around the plunger.

Expandable plunger head assemblies for sealant dispensing guns

Mixing impeller

Mixers for adhesives and sealants that include automatic stroke length adjustment for different sizes and configurations of adhesive and sealant cartridges are disclosed. The mixers include a sensor for detecting when a mixing impeller reaches the top of a cartridge and the bottom of a cartridge, which sends a signal to a main pressure cylinder to reverse direction. The stroke length of the mixer is automatically adjusted without the necessity of manual selection based upon a particular cartridge size.

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Burbank, CA, United States of America

Paul Kuchinski