Title:
インクジェット印刷ヘッドの液滴排出における妨害を検出するための方法
Document Type and Number:
Japanese Patent JP6975159
Kind Code:
B2
Abstract:
In a method for detecting a disturbance in an ejection unit of an inkjet print head, the ejection unit of the inkjet print head includes a pressure chamber for holding an amount of liquid and is in fluid communication with a nozzle orifice; and an actuator operatively coupled to the pressure chamber for generating a pressure wave in the liquid in the pressure chamber for ejecting a droplet of the liquid through the nozzle orifice upon application of a droplet ejection pulse. The method determining at least one resonance frequency of the pressure chamber; determining a disturbance detection pulse for generating a pressure wave in the liquid in the pressure chamber taking into account the resonance frequencies previously determined, wherein the disturbance detection pulse has a frequency spectrum different from a frequency spectrum of the droplet ejection pulse; detecting a residual pressure wave in the liquid in the pressure chamber; and analyzing the residual pressure wave previously detected for determining whether a disturbance for droplet ejection is present in the ejection unit. With this method, disturbances in the ejection unit may be derived from the residual pressure wave more reliably and easier.
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Inventors:
Curator, Amor Ah
Application Number:
JP2018542721A
Publication Date:
December 01, 2021
Filing Date:
February 16, 2017
Export Citation:
Assignee:
Canon Production Printing Holding B.V.
International Classes:
B41J2/01; B41J2/015
Domestic Patent References:
| JP2006021388A | ||||
| JP2007076326A |
Foreign References:
| US20110148967 | ||||
| US20110193903 | ||||
| WO2010023135A1 |
Attorney, Agent or Firm:
Kawaguchi International Patent Office
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