Maintenance system to prime and to exclude air from ink jet head

Details Maintenance system to prime and to exclude air from ink jet head Maintenance system to prime and to exclude air from ink jet head

1981-10-30

1983-09-06

Griffin, Donald A.

Recorders

Record receiver deforming

G01D 542

Patent

active

044032293

ABSTRACT:
The ingestion of air into the print head of an ink jet printer is controlled by a secondary fluidic system. The secondary fluidic system interconnects the ink supply cavity of the head with the primary fluidic system of the printer. The secondary fluidic system includes a valve which is coupled to a venting port of the print head. A rapid decompression regulator is coupled to the valve. The exit port of the regulator is attached to one end of a conduit. The other end of the conduit is disposed in a fluid-containing reservoir. The reservoir serves as an expansion/contraction chamber and keeps air from entering the head even under extreme thermocycling conditions. Likewise, the regulator controls the pressure in the head so that head pressure (P.sub.h) is greater than or equal to ambient pressure P.sub.a. This pressure differential prevents air from entering the head.

REFERENCES:
patent: 3719952 (1973-03-01), Elbaum
patent: 3761953 (1973-09-01), Helgeson et al.
patent: 3805276 (1974-04-01), Ishii
patent: 3848118 (1974-11-01), Rittberg
patent: 3924974 (1975-12-01), Flechbeck et al.
patent: 4042937 (1977-08-01), Perry et al.
patent: 4152710 (1979-05-01), Matsuba et al.
IBM Technical Disclosure Bulletin, Jun. 1981, vol. 24, No. 1B, p. 840.
IBM Technical Disclosure Bulletin, Jun. 1981, vol. 24, No. 1B, pp. 841-842.

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