Method of thermal degassing in an inkjet printer

A method of reducing air in an ink passageway in an inkjet printer by pressurizing a thermally actuated degassing unit that includes an air chamber, venting air through a check valve configured to allow air to vent from the air chamber to ambient when the pressure in the air chamber exceeds ambient...

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Bibliographische Detailangaben
Hauptverfasser:	PRICE BRIAN G, KNEEZEL GARY A
Format:	Patent
Sprache:	eng
Schlagworte:	BLASTING CORRECTION OF TYPOGRAPHICAL ERRORS HEATING i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME LIGHTING LINING MACHINES MECHANICAL ENGINEERING PERFORMING OPERATIONS PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PRINTING PUMPS PUMPS FOR LIQUIDS OR ELASTIC FLUIDS SELECTIVE PRINTING MECHANISMS SEPARATION STAMPS TRANSPORTING TYPEWRITERS WEAPONS
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Beschreibung
Zusammenfassung:	A method of reducing air in an ink passageway in an inkjet printer by pressurizing a thermally actuated degassing unit that includes an air chamber, venting air through a check valve configured to allow air to vent from the air chamber to ambient when the pressure in the air chamber exceeds ambient air pressure by a predetermined amount The pressurizing is performed by heating an element inside the air chamber. A power supply is connected to the heating element, and power is applied to the heating element during a first time interval to increase the pressure in the air chamber above ambient pressure. Gas is vented from the check valve which allows the heating element to cool during a second time interval to reduce the pressure in the air chamber below ambient pressure. Gas is then drawn from the ink passageway through the membrane into the air chamber.