Dispenser for and method of dispensing a material from a non-pre

Details Dispenser for and method of dispensing a material from a non-pre Dispenser for and method of dispensing a material from a non-pre

1978-06-15

1981-10-13

Rolla, Joseph J.

Dispensing

Processes of dispensing

222108, 222207, 222214, B65D 3700

Patent

active

042943817

ABSTRACT:
A material dispenser for dispensing a flowable material from a non-pressurized reservoir having a bore therethrough. A resilient pinch-off tube is removably fitted within the bore. The flowable material reservoir is connected to one end of the tube. At least one dispensing nozzle or needle is coupled to the other end of the tube. Within the dispenser is a mechanism for selectively squeezing the tube to force selected amounts of the flowable material out the needle, and then to draw material from the reservoir into the tube to fill the tube and/or any residual amount of the material in the needle back away from the distal end of the needle thereby to eliminate dripping. Connected to the squeezing mechanism is a control system for sequencing the squeezing operation to perform the method of the invention which includes the steps of filling the tube with material, isolating a portion of the material in the tube from the reservoir, dispensing a portion of the isolated material, and drawing material from the reservoir into the tube to fill the tube and/or the remaining portion of the isolated material in the needle back away from the distal end of the needle.

REFERENCES:
patent: 1799113 (1931-03-01), Miedbrodt
patent: 2673011 (1954-03-01), Rood et al.
patent: 3245269 (1966-04-01), Ivie
patent: 3550619 (1970-12-01), Halasz
patent: 3895748 (1975-07-01), Klingenberg
patent: 3937440 (1976-02-01), McGregor et al.
patent: 3998103 (1976-12-01), Bjorklund et al.
patent: 4042153 (1977-08-01), Callahan et al.
patent: 4095722 (1978-06-01), Miller

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