Hot melt adhesive spray dispenser
AssigneeThe Dexter Corporation
InventorStephen J. Sweeney
Life of this patent
Estimating the term…
Abstract
A hot melt adhesive dispensing apparatus comprises a housing including a supply chamber for receiving and holding a solid adhesive, an electrically powered heater, and a spray nozzle assembly. A pneumatically actuated plunger pushes solid adhesive towards the melt chamber wherein the solid adhesive is progressively melted for passage into the spray nozzle assembly which includes a plurality of air jets which impinge upon the stream of melted adhesive exiting a nozzle to create an adhesive spray.
Claims24
A dispensing apparatus for spraying hot melt adhesive on demand, comprising
- a supply chamber for receiving and holding a charge of solid adhesive,
- an electrically powered heater for melting the solid adhesive, said heater including a melt chamber located at one end of said supply chamber,
- a spray nozzle member including an adhesive passageway having an inlet end for receiving the melted adhesive and an outlet end from which a stream of the melted adhesive exits said spray nozzle member, and said spray nozzle member further including an air passageway for receiving pressurized air from a source thereof and for emitting the pressurized air through a discharge end thereof proximate the stream of melted adhesive exiting from the spray nozzle member to generate a spray of the melted adhesive, and
- a feed mechanism for urging the solid adhesive into said melt chamber, said heater being operative to progressively melt the solid adhesive as it is urged into said melt chamber by said feed mechanism.
A dispensing apparatus for spraying hot melt adhesive on demand, comprising a lower handle portion and an upper barrel portion, said upper barrel portion including a supply chamber for receiving and holding a supply of a solid hot melt adhesive, an electrically powered heater including a melt chamber located at one end of said supply chamber, a pneumatically actuated plunger movable in said supply chamber in one direction for urging the solid adhesive towards said melt chamber and in an opposite direction to permit loading of solid adhesive into said supply chamber, said heater being operative to progressively melt the solid adhesive as it is urged into said melt chamber by said plunger, and a spray nozzle member including an adhesive passageway having an inlet end connected to said melt chamber for receiving the melted adhesive and an outlet end from which a stream of the melted adhesive exits said spray nozzle member, and said spray nozzle member further including an air passageway for receiving pressurized air from a source thereof and for emitting the pressurized air through a discharge end thereof proximate the stream of melted adhesive exiting from the spray nozzle member to generate a spray of the melted adhesive.
A dispensing apparatus for spraying hot melt adhesive on demand, comprising
- a supply chamber for receiving and holding a charge of solid adhesive,
- an electrically powered heater for melting the solid adhesive,
- a spray nozzle member including an adhesive passageway having an inlet end for receiving the melted adhesive and an outlet end from which a stream of the melted adhesive exits said spray nozzle member, and said spray nozzle member further including an air passageway for receiving pressurized air from a source thereof and for emitting the pressurized air through a discharge end thereof proximate the stream of melted adhesive exiting from the spray nozzle member to generate a spray of the melted adhesive,
- pneumatic means for forcing melted adhesive to and through said adhesive passageway,
- valve means for connecting and disconnecting said pneumatic means and air passageway to the source of pressurized air, and
- vent means operative upon disconnection of said pneumatic means and air passageway from the source of pressurized air for exhausting pressurized air from said pneumatic means to the atmosphere via said spray nozzle member thereby to produce a burst of pressurized air to clear residual adhesive from said spray nozzle member.
Dependencies are inferred from the claim text.