Patent ID: 6626097
Filing Date: 2003-09-30
Classification: B23K,H05K

Abstract:
An apparatus for use in a printer that dispenses a viscous material at predetermined positions forming a pattern on a substrate, the apparatus comprising:a material dispenser configured and arranged to dispense the viscous material onto the substrate, the material dispenser including a chamber to contain the viscous material to be dispensed to the substrate, the chamber having an opening through which the viscous material is dispensed onto the substrate; a retraction device, extendable into the chamber, that prevents leakage of the viscous material from the opening after dispensing is complete, the retraction device being configured and arranged to increase a volume of the chamber after dispensing; and a cartridge coupled to the chamber, the cartridge being configured and arranged to contain material to be dispensed to the chamber, the cartridge further including an inlet to receive pressurized air to force the material from the cartridge into the chamber and out of the opening of the chamber.