Nordson Corporation

Joseph G Schroeder

Terrence M Fulkerson

Brian D Mather

Jeffrey A Perkins

Jeffery Edward Dailidas

Charles L Gatian, Iii

Kenneth A Kreeger

Gerald W Crum

Terry John Thompson

William Mark Rucki

Jeanne Marie Leidy

Cynthia A Skelton-Becker

Eddie W Dixson, Jr

Jeffrey R Shutic

Andrew M Peddie

Stephen G Nemethy

Daniel J Thompson

Herman E Turner

Michael R Sanner

James V Bachman

Jeffrey E Dailidas

James Khoury

Donna F Campbell

Mario Romanin

Benjamin J Becker

Robert J Allsop

Nicholas Klasovsky

Ryan Christopher Kaintz

William R Rehman

Alan J Knobbe

Harry J Lader

Jeffrey S Noss

Tim Cunningham

William M Bernstein

John J Binder

Michael S Thomas

Jan L Shanaberger

Joshua T Space

John C A Traylor

Dale R Juhn

Erich W Selic

Thomas Andreas Trautzsch

Edward L Jones

John B Wolanin

James D Powell

Kenneth Zalewski

Larry R Fenik

Christopher M Stygar

David Mancuso

Bryan J Bowman

Paul F Meyers

Vince Bednarz

Angelo Bellini

Ralf Scheuffgen

Merle C Lehman

Claus Ruschitzka

James M Khoury

Kenneth A Keeger

Drew T Degentesh

Dawn S Yorko

Jeffrey Edward Dailidas

A dense phase pump has two housings that are attached together using a single releasable fastener. The fastener can be released to allow the two housings to be separated thereby providing access to replaceable components. The replaceable components may include one or more pinch valves or one or more barrier elements. A pinch valve for a dense phase pump has a shape or profile for aligning the pinch valve when the pinch valve is installed in a pinch valve body. The pinch valve optionally has two end flanges, with each end flange having a shaped periphery. The two end flanges may have the same size and shape so that the pinch valve can be installed in either of two orientations that are inverse. A dense phase pump has a pump chamber that can be purged by purge gas that enters the pump off-axis from a purge path axis.

Dense phase pump with easily replaceable components

A color changer has a common feed passage that is connected to two or more inlet passages. The common feed passage can be reverse purged in a direction that is opposite a direction of powder flow through the common feed passage. A valve element seals a supply port that connects the inlet passage to the common feed passage to eliminate dead space and form a near bore line seal. The valve element is an elastic material that expands in response to applied compressed air inside the valve element.

Color change for powder coating material application system

Apparatus for detecting powder flow along a powder flow path includes a light source and a light detector for detecting light from the light source directed across the powder flow path as powder flows through said powder flow path. A circuit receives the output from the light detector and determines an average or RMS of the signal received by the light detector. The circuit may determine whether there is flow or no flow of powder or whether there is a change in flow rate of powder. Preferably, the apparatus is used in combination with a dense phase powder pump, which causes the powder to flow in pulses from the pump outlet into the powder flow path. More preferably, the light source and detector are enclosed in a housing that is connected between the pump outlet and a powder feed hose which supplies powder to a spray gun or hopper.

Powder flow detection

A powder spray for lengthy parts includes a booth wall structure comprised primarily of doors. A moveable roof may be raised and lowered to clean powder overspray from the interior surfaces of the booth. A cleaning process may be performed with a sideways extraction mode and a downward extraction mode. The mode change occurs when a bulkhead that travels with the moveable roof blocks the inlet duct to the recovery system. The recovery system may be a cyclone system for example. The doors of the booth are hinged so that they can be positioned for spraying operations and cleaning operations. Live hinge designs are provided and hose stress relief designs are also provided. The roof may carry accumulators for pressurized air that feed cleaning nozzles as the roof descends. In addition, exhaust air may be used to assist cleaning the interior surfaces as the roof descends. All of the energy provided for cleaning and color change may be provided by accumulators.

Powder coating booth

A nozzle assembly for a material application device includes an expansion chamber for slowing down the velocity of powder fed to the nozzle from a dense phase pump. The nozzle assembly includes a nozzle insert that forms the expansion chamber and provides air assist function. The nozzle includes an integral deflector, and further includes a passageway for a charging electrode so that the electrical path is routed away from the powder path, while permitting the electrode tip to be centered in the powder spray pattern from the nozzle. The nozzle also includes air wash for the electrode. The nozzle outlet orifice has a cross-sectional area that is equal to or greater than the inlet cross-sectional area so that a slow moving dense phase powder cloud is produced by the nozzle.

Spray applicator with multi-piece housing

Particulate material applicator and pump

A powder hopper is provided with a low turbulence zone for supplying powder to a spray gun. The low turbulence zone is defined by a baffle inside the hopper with the low turbulence zone being within a volume of the baffle, and an annular zone between the baffle and the hopper is used to bulk feed powder into the hopper. The low turbulence zone may alternatively be in the annular zone with powder added to the volume of the baffle. One preferred application for this hopper is in connection with the use of fine powder coating materials to coat the interior of small diameter cans.

Powder hopper with quiet zone, a combination of a powder hopper and a powder spray gun and a method of operating a powder hopper

A pump for particulate material includes a pump chamber wherein material flows into the pump chamber under negative pressure and flows out of the pump chamber under positive pressure. A plurality of pinch valves are provided to control flow of material into and out of the pump chamber. The pinch valves are operated independent of each other and of the pump cycle rate. A modular design of the pump is provided. A pump control feature is provided for air flow rate control during positive and negative pressure conditions.

Pump for powder coating materials with data structure for storing powder flow recipes

A nozzle for a powder spray gun optionally includes an internal filter that allows air to be added to the powder flow within the nozzle shell. The nozzle may optionally include an off-axis outlet slot relative to a main flow axis of the powder into the nozzle shell so that powder encounters an obstruction before exiting through the outlet slot.

Spray gun and coating system with filter in spray gun nozzle

Pump with suction and pressure control for dry particulate material

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North Royalton, OH, United States of America

Joseph G Schroeder