Liquid dispensing system with sealing augering screw and method

Details Liquid dispensing system with sealing augering screw and method Liquid dispensing system with sealing augering screw and method

1995-11-22

1998-10-13

Huson, Gregory L.

Dispensing

Processes of dispensing

222333, 222413, 198670, B67B 700

Patent

active

058199837

ABSTRACT:
A liquid dispenser has an augering screw that serves both a metering function and a valving function. The augering screw is axially movable between a position in which fluid can flow and a sealing position in which liquid flow through the nozzle is substantially prevented. The screw is preferably designed with a curved contour between the threads and with a plurality of thread-defining channels to allow liquid to fill more completely around the screw and to dispense more liquid with fewer screw turns than prior screw designs.

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patent: 5564606 (1996-10-01), Engel
Hogan, ed., "Adhesive Dispenser Provides 2% Volume Repeatability," Design News, Apr. 11, 1994.
LCC/Dispensit, "Dispensit.RTM. Model 1000 Series," (1993).
Camelot Systems, Inc., "CAM/ALOT Liquid Dispensing Systems" Oct. 1994.
ASYMTEK, "A-600 Series Automated Fluid Dispensing Systems," Sep. 1995.
Bouras, Carlos E. and Alec. J. Babiarz, "Adhesive Dispensing for Flip Chip-on-Board," Electronic Packaging & Production (Oct. 1995).
Universal Instruments Corporation, "GDM1," Surface Mount (1994).
Engel, Jack, "Selecting The Proper Dispensing Tip," Surface Mount Technology (Oct. 1990).
ADM Options, "Optional Equipment for ADM-Automatic Dispensing Systems," Creative Automation (date unknown).
Panasert HD Series, "Three Types of Dispensing Nozzles Support a Wide Range of Chips for Reliable High-Speed Adhesive Application" (date unknown).

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