Hot melt adhesive dispensing system of the hand held gun type

A system for dispensing a molten fluid thermoplastic adhesive, said system including

• a hand held gun
• a molten fluid adhesive source located remote and separate from said gun, said gun comprising
• a storage chamber adapted to receive a charge of molten fluid adhesive therein,
• a charge valve structured to receive molten fluid adhesive therethrough from the exterior of said gun, and to prevent discharge of fluid adhesive therethrough from the interior of said gun,
• a nozzle through which the molten fluid adhesive is discharged, and
• a discharge valve actuable by an operator for controlling discharge of the molten fluid adhesive from said gun, and said fluid adhesive source comprising
• a feed valve mounted to said source, said feed valve being connectable with said gun's one-way charge valve to permit charging of said gun's storage chamber with a molten fluid adhesive charge from said molten fluid adhesive source and then subsequent disconnection of said gun's one-way charge valve from said source mounted feed valve.

A hand held gun for dispensing a molten fluid adhesive, said gun comprising

• a storage chamber within which a charge of molten fluid adhesive is stored,
• a nozzle through which said molten fluid adhesive is discharged onto a workpiece,
• a discharge valve operable by the gun's operator for controlling discharge of the molten fluid adhesive through said nozzle,
• a pressurizing device within said gun, said pressurizing device maintaining that molten fluid adhesive within said storage chamber under pressure during discharge of fluid adhesive from said gun,
• a charge valve connected with said storage chamber, said charge valve permitting flow of a molten fluid adhesive charge one way through said valve into said storage chamber for charging and recharging said storage chamber, but preventing flow of fluid adhesive from said storage chamber out through said charge valve to atmosphere, and
• adapter means mounted on said gun, said adapter means being operable to sealingly connect said gun with a remote and separate fluid adhesive source for charging said storage chamber through said one-way charge valve and to permit said gun to be disconnected from said fluid adhesive source and used as a portable device.