Incremental printing of symbolic information – Ink jet – Ejector mechanism
Patent
1995-03-23
1998-07-21
Gray, David M.
Incremental printing of symbolic information
Ink jet
Ejector mechanism
347 32, B41J 2165
Patent
active
057840814
ABSTRACT:
Disclosed are a method of and an apparatus for cleaning a plurality of nozzles of an ink jet head. This cleaning method comprises a step of covering a nozzle surface formed with the plurality of nozzles with a cap; a step of depressurizing an air space formed between the nozzle surface and the cap by use of a depressurizing element to suck the inks from the nozzles; a step of stopping the depressurization by the depressurizing element; a step of keeping the nozzle surface covered with the cap so that the inks jetted from the nozzles due to the depressurization wet-spread over the entire nozzle surface by a capillary force; and a step of retracting the cap from the nozzle surface. Further, in this cleaning apparatus, a contact angle .theta.1 between the ink and the cap internal surface and a contact angle .theta.2 between the ink and the nozzle surface are set to 90.degree. or smaller and also set such that .theta.2 is not greater than .theta.1.
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Prior Art Information List; Dated Jul. 25, 1995; Search Report w/3 cited documents; (1) Publication No.: JP4219250; Publication Date: Aug. 10, 1992, (2) Publication No.: JP4014461; Publication Date: May 8, 1990, (3) Publication No.: JP4235053; Publication Date: Jan. 9, 1991.
Communication-European Search Report; Aplication No.: 95302670.5; Jul. 11, 1995.
Akeno Keita
Ozaki Mitsuo
Sakai Shino
Suzuki Shigeharu
Umemiya Shigeyoshi
Dalakis Michael
Fujitsu Limited
Gray David M.
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