Method and apparatus for dispensing material in a printer

  • US 6,324,973 B2
  • Filed: 01/21/1999
  • Issued: 12/04/2001
  • Est. Priority Date: 11/07/1997
  • Status: Expired due to Term
First Claim
Patent Images

1. A printer for printing a viscous material at predetermined positions forming a pattern on a substrate, the printer comprising:

  • a frame;

    a device, mounted to the frame, having a number of perforations arranged to form the pattern;

    a support apparatus, coupled to the frame, that supports the substrate in a printing position beneath the device; and

    a material dispenser having a ridged chamber to contain the viscous material to be printed on the substrate, the chamber having an opening through which the viscous material is dispensed, the material dispenser being coupled to the frame, positioned over the device, and constructed and arranged to dispense the viscous material through the perforations in the device and onto the substrate, the material dispenser having a retracttion device, extendable into the chamber, that prevents leakage of the viscous material form the opening after dispensing is complete, the retraction device being configured and arranged to increase the volume of the rigid chamber after dispensing, the material dispenser further having at least one port and a removable cartridge coupled to the port, the removable cartridge containing material to be dispensed and having an inlet to receive pressurized air to force the material from the cartridge through the port and out of the opening of the chamber.

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