Frederick Gregory Sevald

US Patent:

50206931, Jun 4, 1991

Filed:

Jun 30, 1989

Appl. No.:

7/373424

Inventors:

Richard J. Ernst - Palatine IL
Sigismund Paul - Palatine IL
Frederick G. Sevald - Evanston IL
Marian Olma - Chicago IL

Assignee:

Illinois Tool Works Inc. - Glenview IL

International Classification:

B65D 8854

US Classification:

222137

Abstract:

A pneumatically actuatable dispenser for a two-part adhesive, as provided within a cartridge having two chambers and having a mixing nozzle mounted upto a first end, each chamber having a plunger accessible from a second end. A front frame holds the cartridge. A piston is arranged to be selectively driven within a cylinder in a forward or reverse direction. A pair of piston rods operate in tandem so as to drive the plungers toward the nozzle, when driven conjointly with the piston in the forward direction. A first valve, when actuated, delivers pressurized air from driving the piston in the forward direction. A second valve, when actuated, delivers pressurized air for driving the piston in the opposite direction. A third valve, when actuated while the first valve is actuated, vents pressurized air from the cylinder. A first control rod, which moves conjointly with the piston, and a second control rod may be selectively linked to each other for conjoint movement or unlinked from each other, by means of a linking lever and a cam.