Nordson Corporation

Bentley J Boger

Thomas Burmester

Jurgen Benecke

Arthur Cieplik

Peter J Petrecca

Michael L Gill

Thomas C Jenkins

John M Raterman

James W Schmitkons

Roger A Ziecker

Alan R Ramspeck

James J Turner

Paul S Brusko

Dwayne N Lewis

Timothy L Rochman

Antonio Rivas

Marcus P Zupan

A computerized design system for configuring an adhesive dispensing configuration. The system enables a user to graphically or otherwise manipulate markers representative of dispensing components. Programmatic rules associated with the markers guide the design process by ensuring and/or prompting compatible and otherwise appropriate marker selections for inclusion in the design.

Adhesive system configuration tool

A liquid material dispensing system provides individually metered streams of liquid material to a nozzle or die tip which dispenses the liquid material in a closely spaced arrangement. In one embodiment, the dispensing system utilizes a series of gear pumps to induce the flow of liquid material through individual dispensing modules. An adapter intermediate the modules and the die tip directs the individually controlled streams from a spacing provided by the modules to a close arrangement, such as may be suitable for coating parallel strands of substrate material.

Metered liquid dispensing system

Coating dispenser apparatus and methods which utilize a snuff back device for removing a small amount of coating material from the discharge passage of the dispenser upon shut-off thereof at the end of a coating run. A control is provided which discharges the material removed from the discharge passage back into the discharge passage upon a predetermined delay after the start of the next coating run. The disclosed methods contemplate the discharge of coating material back into the discharge passage in the middle of the next coating pattern, or depending on the application, during any segment of the next coating pattern after a defined leading edge of the pattern is created, during which segment the coating material discharged back into the discharge pattern smoothly blends into the coating pattern as it is applied to a substrate. The apparatus and methods are especially useful for applying conformal coating patterns onto circuit boards.

Snuff back controlled coating dispensing apparatus and methods

Apparatus for producing intermittent, discrete patterns of coating material onto discrete irregular substrate areas, such as electronic circuit boards, where the patterns have sharp, square leading and trailing edges, as well as side edges. A slot nozzle die has elongated air slots along the slot extrusion opening. In the operation of the apparatus, the air flow is initiated from both air slots prior to the initiation of the coating material flow. Also, the air flow is continued beyond that point in time, when the coating material flow ceases. The delays between the operations of the air flow and the hot melt flow are on the order of micro seconds. Alternatively, the lead and lag air start and stop times on each side of the film of coating material are different to control the exact disposition of the square cut-on and square cut-off coating edge on the circuit board. The air flow carries the film coating material to the circuit board for deposition in discrete areas thereon. The sharp cut-on and cut-off accommodate multiple discrete area coating or multiple automated circuit board coating. Methods are disclosed.

Apparatus for applying conformal coatings to electronic circuit boards

Apparatus and methods for spraying an adhesive onto a substrate moving along a surface with a plurality of gun modules which are attached to individual mounting plates which in turn are secured to an adhesive and air service manifold. The gun module and movable plate assemblies can be mounted to the service manifold in a manner that enables the gun module and moveable plate assemblies to be individually shifted to a plurality of preset locations in a direction parallel to the moving surface for changing the adhesive pattern sprayed onto the substrate.

Adhesive spray gun system with individually adjustable spray modules

Apparatus and methods for producing intermittent, discrete patterns of coating material onto discrete irregular substrate areas, such as electronic circuit boards, where the patterns have sharp, square leading and trailing edges, as well as side edges. A slot nozzle die has elongated air slots along the slot extrusion opening. In the operation of the apparatus, the air flow is initiated from both air slots prior to the initiation of the coating material flow. Also, the air flow is continued beyond that point in time, when the coating material flow ceases. The delays between the operations of the air flow and the hot melt flow are on the order of micro seconds. Alternatively, the lead and lag air start and stop times on each side of the film of coating material are different to control the exact disposition of the square cut-on and square cut-off coating edge on the circuit board. The air flow carries the film coating material to the circuit board for deposition in discrete areas thereon. The sharp cut-on and cut-off accommodate multiple discrete area coating or multiple automated circuit board coating.

Apparatus and methods for applying conformal coatings to electronic

A nozzle cap, adapted for use with an adhesive dispensing device which includes a gun body and a nozzle having an adhesive passageway and an air passageway, comprising a nozzle mounting portion or nut permanently mounted to a nozzle plate formed with a stepped throughbore having an inlet with a seat which mounts an O-ring and a plurality of spaced air jet bores located radially outwardly from the throughbore and O-ring. Both the nut and nozzle plate are machined separately, and then are substantially permanently interconnected by roll-forming an end of the nut onto the peripheral edge of the nozzle plate. When the nut portion of the nozzle cap is assembled on the nozzle of the adhesive dispensing device, the nozzle plate is positioned such that its stepped throughbore communicates with the adhesive passageway in the nozzle and its air jet bores communicate with the air passageway in the nozzle. An adhesive bead is extruded through the stepped throughbore in the nozzle plate, and this bead is impacted by air jets from the spaced air jet bores which stretch or attenuate the adhesive bead to form an elongated adhesive fiber for deposition in a controlled spiral spray pattern onto a substrate.

Nozzle cap for an adhesive dispenser

A method and adhesive dispensing apparatus for applying continuous, parallel rows of adhesive onto the center portion of the backing sheet of a disposable diaper and intermittent, parallel rows of adhesive on the outer portions of the backing sheet on either side of the center portion. The apparatus includes a slot nozzle, divided into two center sections and two end sections, which is formed with flow passageways for each section having a coat hanger profile including a plurality of spaced, discharge orifices to form the parallel adhesive rows. A valving arrangement including solenoid-operated center dispensing valves for each center section of the nozzle, and solenoid-operated dispensing and recirculation valve pairs for each end section of the nozzle, controls the flow of adhesive to the nozzle. The center dispensing valves are continuously opened during an operating run to apply continuous adhesive beads on the center portion of the backing sheet, and the outer dispensing valves are opened and closed intermittently to form gaps on the end portions of the backing sheet without adhesive where the leg holes of the diaper are subsequently cut to form individual diapers.

Method of forming a disposable diaper with continuous/intermittent rows

An apparatus for spraying heated hot melt adhesive in a relatively wide spray pattern comprises a manifold and at least two spray guns mounted side-by-side to the manifold. Each spray gun includes a nozzle having an adhesive discharge passageway which ejects a bead of hot melt adhesive, and a plurality of air jet bores which direct jets of pressurized air to the outer periphery of the adhesive bead to attentuate the bead forming elongated adhesive fibers and to impact a rotational motion to the fibers forming a spiral spray pattern. The air jet bores in the nozzle of one spray gun are angled with respect to the adhesive discharge passageway therein so that the adhesive fibers are rotated in one of a clockwise or counterclockwise direction, whereas the air jet bores in the nozzle of an adjacent spray gun are angled to rotate the adhesive fibers in the other of a clockwise or counterclockwise direction so that adjacent spiral spray patterns are counter-rotating to avoid the formation of eddies or turbulence therebetween.

Method and apparatus for spraying hot melt adhesive elongated fibers in

An apparatus for spraying heated hot melt adhesive in elongated strands or fibers in a controlled, spiral pattern upon a substrate comprises a spray gun having a nozzle formed with an adhesive delivery passageway and an air delivery passageway both of which terminate at the base of the nozzle. A nozzle attachment in the form of an annular plate is mounted to the base of the nozzle by an end cap. The annular plate is formed with a throughbore which receives hot melt adhesive from the adhesive delivery passageway and ejects an adhesive bead through a nozzle tip formed on the plate. An annular groove formed in the plate facilitates the drilling of air jet bores therein at an angle relative to the throughbore and adhesive bead ejected therefrom. The air jet bores receive pressurized air from the air delivery passageway and direct the pressurized air substantially tangent to the adhesive bead to form elongated adhesive fibers and to impart a spiral motion to the elongated fibers so that they are formed in a compact spray pattern for deposition onto a substrate.

Adhesive spray gun and nozzle attachment

An adhesive dispensing apparatus for applying continuous, parallel adhesive beads onto the center portion of a substrate and intermittent, parallel adhesive beads on the outer portions of a substrate, particularly the plastic backing sheet of a disposable diaper. The apparatus includes a slot nozzle, divided into two center sections and two end sections, which is formed with flow passageways for each section having a coat hanger profile including a plurality of spaced, discharge orifices to form the parallel beads. A valving arrangement including solenoid-operated center dispensing valves for each center section of the nozzle, and solenoid-operated dispensing and recirculation valve pairs for each end section of the nozzle, controls the flow of adhesive to the nozzle. The center dispensing valves are continuously opened during an operating run to apply continuous adhesive beads on the center portion of the substrate, and the outer dispensing valves are opened and closed intermittently to form gaps on the substrate without adhesive where the leg holes of the diaper are cut. When the outer dispensing valves are closed, the recirculation valves are simultaneously opened to maintain constant adhesive flow to the center dispensing valves.

Growing community of inventors

Atlanta, GA, United States of America

Bentley J Boger