Surface locating and dispensed dosage sensing method and apparat

Details Surface locating and dispensed dosage sensing method and apparat Surface locating and dispensed dosage sensing method and apparat

1985-09-18

1987-04-28

Smith, John D.

Coating processes

Measuring, testing, or indicating

118323, 118410, 118669, 118692, 427 58, 427 96, 4272071, H05K 330

Patent

active

046613684

ABSTRACT:
A dispensing nozzle tip is advanced into engagement with the particular position of the circuit board to which material is to be applied, and a reactive force on the nozzle tip from the circuit board is sensed by variation in the output from a load cell such that an exact spacing may be provided between the nozzle tip and that portion of the surface to which material is to be dispensed. Having provided such spacing between the tip and surface, the flowable material is dispensed and a reactive force from the surface, via the flowable material, is sensed by the load cell arrangement to provide for metering of a dose of the flowable material. Such surface location and dispensed dosage sensing is performed for every dose of material to be applied.

REFERENCES:
patent: 3961599 (1976-06-01), Jones
patent: 4346124 (1982-08-01), Wood
patent: 4485387 (1984-11-01), Drumheller
patent: 4515297 (1985-05-01), Schoenthaler
patent: 4530862 (1985-07-01), Kerzel
patent: 4569305 (1986-02-01), Ferri
patent: 4572103 (1986-02-01), Engel

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