Abstract: Purge method and apparatus for a manual spray gun or coating material application device, in which purge air is introduced into the device through a handgrip portion that is manually held during a coating operation. Purge air first enters the coating material flow path after the purge air enters the handgrip portion.

Abstract: Purge method and apparatus for a manual spray gun or coating material application device, in which purge air is introduced into the device through a handgrip portion that is manually held during a coating operation. Purge air first enters the coating material flow path after the purge air enters the handgrip portion.

Abstract: Purge method and apparatus for a manual spray gun or coating material application device, in which purge air is introduced into the device through a handgrip portion that is manually held during a coating operation. Purge air first enters the coating material flow path after the purge air enters the handgrip portion.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: Purge method and apparatus for a manual spray gun or coating material application device, in which purge air is introduced into the device through a handgrip portion that is manually held during a coating operation. Purge air first enters the coating material flow path after the purge air enters the handgrip portion.

Abstract: 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.

Abstract: A plurality of unconventional negative tribo-charging materials are described for use as the powder contact surfaces in tribocharging and corona powder spray guns, gun compounds, and powder delivery system components. The invention also provides a short barrel tribo-charging powder spray gun having an interchangeable powder contact insert and nozzle, with turbulence inducing air jets. The invention further provides novel tribocharging and corona gun designs. Improved powder coating systems are made possible wherein, for example, negative tribo guns can be utilized with negative corona guns to coat different parts of the same workpiece in a powder coating system and to realize a repair coating process. Also proived is an inside-out configuration in which pressurized air directs powder coating material outward towards a charging surface. Additional configurations provide airjet induced tribocharging and conventional tribocharging portions combined in a single gun.

Abstract: A plurality of unconventional negative tribo-charging materials are described for use as the powder contact surfaces in tribocharging and corona powder spray guns, gun components, and powder delivery system components. The invention also provides a short barrel tribo-charging powder spray gun having an interchangeable powder contact insert and nozzle, with turbulence inducing air jets. The invention further provides novel tribocharging and corona gun designs. Improved powder coating systems are made possible wherein, for example, negative tribo guns can be utilized with negative corona guns to coat different parts of the same workpiece in a powder coating system. Also provided is an inside-out configuration in which pressurized air directs powder coating material outward towards a charging surface. Additional configurations provide air jet induced tribocharging and conventional tribocharging portions combined in a single gun.

Abstract: An annular thread cutting die head for a power driven threading machine is comprised of an annular support plate assembly supporting a plurality of radially displaceable threading cutting dies spaced apart about the axis of the die head, and a cam plate assembly coaxial with and pivotal relative to the support plate assembly to radially displace the cutting dies. The cam plate assembly is spring biased to pivot relative to the support plate assembly in the direction to radially retract the cutting dies, and pivoting in the latter direction is controlled by a keeper mounted on the support plate assembly and engaging a keeper track on the cam plate assembly.

Abstract: A rotatable chuck for supporting a plastic coated workpiece in a power driven threading machine is disclosed comprising workpiece engaging jaws mounted on the machine spindle for rotation therewith and for pivotal movement relative thereto radially inwardly and outwardly of the spindle axis. Each jaw pivotally supports an insert holder provided with a pair of inserts for engaging the outer surface of the workpiece. Each of the insert holders pivotally supports a centering link associated with an adjacent jaw so as to be actuated in response to pivotal displacement of the jaws radially inwardly of the spindle axis to control the attitude of the insert holders so that the inserts are directed radially inwardly of the spindle axis to assure a uniform gripping action by the two inserts of each holder upon engagement with the workpiece. The centering links also displace the workpiece to a centered position coaxial with the spindle axis during inward displacement of the jaws.