Abstract:
An electrostatic powder spraying apparatus that includes a nonrotating disk-like member having an edge; the electrostatic field extends between the edge of disk and articles to be coated. A first means of the apparatus deflects powder radially outwardly into a chamber. The chamber is adjacent the first means and provides space in which tangential streams impart a spiral motion or whirling cyclone-type motion to the radially deflected powder. An apertured means is spaced from the non-rotating disk-like member. The spiral motion of entrained powder moves it outwardly along the surface of the non-rotating disk-like member and causes air to be aspirated through the aperture to mix with the powder moving radially outwardly along the surface of the disk-like member. By this means the powder is given sufficient momentum to be ejected from the edge of the disk to the vicinity of an article at a powder attracting potential where the electrostatic field forces can guide the charged powder to the article.
Abstract:
AN APPARATUS AND A METHOD FOR DEPOSITING CHARGED PARTICLES OF A POWDERY SUBSTANCE ONTO AN EDGE OF A SUBSTRATE. THE APPARATUS MAY INCLUDE MEANS FOR EMITTING PARTICLES OF A POWDERY SUBSTANCE TOWARD THE SUBSTRATE. SUBSTANTIALLY ALL OF THE PARTICLES ARE PROPELLED BEYOND A LEADING EDGE OF THE SUBSTRATE TO THE VINCINITY OF A TRAILING EDGE OF THE SUBSTRATE. ANOTHER MEANS IS ADJACENT THE TRAILING EDGE OF THE SUBSTRATE WHICH IS CAPABLE OF CAUSING ELECTROSTATIC DEPOSITION OF THE PARTICLES ONTO THE TRAILING EDGE OF THE SUBSTRATE.
Abstract:
AN APPARATUS FOR AND A METHOD OF PROVIDING CHARGED PARTICLES OF AN ORGANOPLASTIC MATERIAL INCLUDING BUT NOT LIMITED TO A POLYMERIC ORGANOPLASTIC FOAM. THE ORGANOPLASTIC MATERIAL MAY BE USED AS BACKING OR A MYRIAD OF SUBSTRATE MATERIALS INCLUDING BUT NOT LIMITED TO NONCONDUCTIVE SUBSTRATE MATERIALS SUCH AS WOVEN AND NONWOVEN FIBER WEBS AND CONDUCTIVE METALLIC SUBSTRATE MATERIASL SUCH AS ALUMINUM AND STEEL. THE APPARATUS FOR PROVIDING THE CHARGED PARTICLES INCLUDES AN ELECTRICALLY INSULATIVE BELT HAVING A SURFACE UPON WHICH THE ORGANOPLASTIC MATERIALS IS PLASED AND TRANSPORTED TO AN ELECTRICAL CHARGING AND ATOMIZING ZONE. POSITIONED WITHIN THE CHARGING AND ATOMIZING ZONE IS MEANS HAVING AN EXTENDED OR ELONGATED EDGE AT HIGH ELECTRICAL POTENTIAL. THE EXTENDED EDGE IS SO POSITIONED AS TO BE SUBSTANTIALLY TRANSVERSE OF AND IN CLOSE PROXIMITY WITH THE SURFACE OF THE INSULATIVE MEANS TRANSPORTING THE ORGANOPLASTIC MATERIAL. A HIGH INTENSITY ELECTRIC FIELD EXTENDS FROM THE EXTENDED EDGE TO, OR IN SOME INSTANCES, THROUGH THE SUBSTRATE IF THE SUBSTRATE IS POROUS AND FABRICATED FROM AN INSULATIVE RATHER THAN A CONDUCTIVE MATERIAL. THE POSITION OF THE EXTENDED EDGE AT HIGH ELECTRICAL POTENTIAL RELATIVE TO THE ORGANOPLASTIC MATERIAL CAUSES THE ORGANOPLASTIC MATERIAL TO BE FORMED INTO CHARGED PARTICLES THAT ARE PROJECTED TOWARD AND DEPOSITED UPON THE SUBSTRATE.
Abstract:
A METHOD FOR COATING AN ARTICLE WITH POWDER INCLUDES DIRECTING ONE OR MORE AIR-SUSPENDED POWDER SPRAYS INTO A CHAMBER THROUGH WHICH THE ARTICLE IS MOVED. THE SPRAYS ARE ELECTROSTATICALLY DEPOSITED ON THE ARTICLE. UNDEPOSITED POWDER IS FLUIDIZED WITHIN THE CHAMBER AND WITHDRAWN IN A FLUIDIZED STATE. THE FLUIDIZED POWDER SO WITHDRAWN MAY BE RE-SUPPLIED TO THE SPRAYS.
Abstract:
A holder adapted to receive a nozzle of an electrostatic spray coating apparatus. The holder includes a body of electrically insulative material having an aperture adapted to receive the nozzle, forwardly extending means formed in the body and an electrode carried by the means. The electrode terminates prior to the termination point of any of the forwardly extending means and is at an angle with respect to the axis of the aperture in the body adapted to receive the nozzle.
Abstract:
A system for and a method of synchronizing the movement of serially connected drive and driven fluid motors employed to move electrostatic coating devices across articles to be coated. The electrostatic devices coat the articles with a protective and/or decorative coating material. Valve means is connected to a source of fluid under pressure and to a fluid input port of the drive fluid motor to control the direction of movement of the fluid motors and hence control movement of the electrostatic devices cooperatively associated with the fluid motors. Means, cooperatively associated with the fluid motors, which reacts to an imbalance in the movement of the fluid motors so as to cause balanced movement of the fluid motors so that the movement of the driven fluid motor is substantially synchronized with the movement of the drive fluid motor.
Abstract:
An apparatus capable of dispensing particulate material and a method for accomplishing the dispensing of the material. The apparatus includes a fluid-activated means capable of causing particulate material to be withdrawn from a reservoir at a rate which is substantially proportional to the fluid flow rate in the fluid-activated means. A means for dispensing the particulate material toward an article to be coated is connected to the fluid-activated means through a conduit. A fluid divider has an inlet port connected to a source of compressed fluid. The fluid divider also includes a plurality of outlet ports. One of the outlet ports of the fluid divider is connected to the reservoir to thereby provide the fluid flow which activates the fluidactivated means. Another of the outlet ports of the fluid divider is connected to the conduit to provide a fluid flow in the conduit which assists in the movement of the particulate material in the conduit toward the means which dispenses the material. The fluid divider may be a device which includes a fluid-splitting member which divides the fluid flow at the inlet port among the several outlet ports. The sum of the fluid flows at the outlet ports of the fluid divider is substantially proportional to the fluid flow at the inlet port.