Adhesive applicator

Claim 1

A system for selectively applying a fluid to a relatively moving workpiece surface, comprising in combination, structure forming at least one nozzle orifice mounted adjacent the path of the work surface for projecting pressurized fluid thereon; a pump including a chamber and a fluid compression member movable in said chamber, said nozzle being a passageway through said fluid compression member; transport means to carry a workpiece in a work path adjacent said nozzle, said transport means including an actuator means; said actuator means being in the form of a cam having more than one major peak portion for fluid ejection pattern control, and said responsive means being a cam follower; a responsive means associated with said fluid compression member and responsive to contact by said actuator means for driving said fluid compression member in a fluid compression stroke; whereby, fluid is ejected through said nozzle as a physical pumping action of the transport means moving past said nozzle.

Claim 2

A system for selectively applying a fluid to a relatively moving workpiece surface, comprising in combination, structure forming at least one nozzle orifice mounted adjacent the path of the work surface for projecting pressurized fluid thereon; a pump including a chamber and a fluid compression member movable in said chamber, said nozzle being a passageway through said fluid compression member; transport means to carry a workpiece in a work path adjacent said nozzle, said transport means including an actuator means; said actuator means being in the form of a cam having more than one major peak portion for fluid ejection pattern control, and said responsive means being a cam follower; a responsive means associated with said fluid compression member and responsive to contact by said actuator means for driving said fluid compression member in a fluid compression stroke; whereby, fluid is ejected through said nozzle as a physical pumping action of the transport means moving past said nozzle.

Claim 3

A system for selectively applying a fluid to a surface of relatively moving workpiece comprising: at least one nozzle orifice; pump means for supplying fluid under pressure to said nozzle orifice, said pump means comprising a chamber for receiving the fluid, piston means movable within said chamber from a first position of increased chamber volume to a second position of decreased chamber volume for pressurizing and forcing the fluid from said chamber through said nozzle orifice; first conduit means providing fluid communication between said chamber and said nozzle orifice; second conduit means providing fluid communication between said chamber and a source of fluid; valve means disposed within said second conduit means and operative to permit fluid movement only in the direction from said source of fluid to said chamber, third conduit means providing communication between said chamber and said source of fluid, normally closed valve means disposed within said third conduit means, and detector means responsive to the absence of a workpiece on said carrier means and operative to open said normally closed valve means whereby fluid is recycled to said source of fluid rather than forced through said nozzle orifice; valve means disposed within said first conduit means comprising a valve body and seat coacting to permit fluid movement only in the direction from said chamber to said nozzle orifice, said valve means opening in response to movement of said pIston means from said first position to said second position; carrier means for supporting and moving a workpiece into the path taken by fluid issuing from said nozzle orifice; and means mounted for movement with said carrier means to move said piston means in timed sequence with the movement of said workpiece into a fluid-receiving position with respect to said nozzle orifice.

Claim 4

A system for selectively applying a fluid to a surface of relatively moving workpiece comprising: at least one nozzle orifice; pump means for supplying fluid under pressure to said nozzle orifice, said pump means comprising a chamber for receiving the fluid, piston means movable within said chamber from a first position of increased chamber volume to a second position of decreased chamber volume for pressurizing and forcing the fluid from said chamber through said nozzle orifice; first conduit means providing fluid communication between said chamber and said nozzle orifice; second conduit means providing fluid communication between said chamber and a source of fluid; valve means disposed within said second conduit means and operative to permit fluid movement only in the direction from said source of fluid to said chamber, third conduit means providing communication between said chamber and said source of fluid, normally closed valve means disposed within said third conduit means, and detector means responsive to the absence of a workpiece on said carrier means and operative to open said normally closed valve means whereby fluid is recycled to said source of fluid rather than forced through said nozzle orifice; valve means disposed within said first conduit means comprising a valve body and seat coacting to permit fluid movement only in the direction from said chamber to said nozzle orifice, said valve means opening in response to movement of said pIston means from said first position to said second position; carrier means for supporting and moving a workpiece into the path taken by fluid issuing from said nozzle orifice; and means mounted for movement with said carrier means to move said piston means in timed sequence with the movement of said workpiece into a fluid-receiving position with respect to said nozzle orifice.