A drop generator for a printing head of a continuous inkjet printer includes at least one ink feed conduit for feeding ink into a stimulation chamber, which has a quality factor Q lower than 2 and at least one resonant frequency f.sub.r; an actuator for stimulating a wall of said stimulation chamber; and at least one nozzle for ejecting a jet.

An inkjet printer includes a first light applicator disposed in a second scanning direction relative to a recording head. The first light applicator includes a first upstream light source group at a location corresponding to a location of the recording head in a movement direction of a recording medium, and a first downstream light source group on a downstream side in the movement direction of the recording medium relative to the recording head. The inkjet printer turns off the first upstream light source group and turns on the first downstream light source group during movement of a carriage in a first scanning direction and discharge of first ink from the recording head, and turns on the first upstream light source group and the first downstream light source group during movement of the carriage in the second scanning direction after discharge of the first ink.

A drop generator for a printing head of a continuous inkjet printer includes at least one ink feed conduit for feeding ink into a stimulation chamber, which has a quality factor Q lower than 2 and at least one resonant frequency f.sub.r; an actuator for stimulating a wall of said stimulation chamber; and at least one nozzle for ejecting a jet.

There are provided an ink jet printing apparatus, a dummy jet method, and a program which can execute a dummy jet at a dummy jet execution timing in which a use status of a nozzle is taken into consideration. A non-jettable period and a required jetting amount of an ink jet head are set for each nozzle, and in a case where the dummy jet for a dummy jet execution nozzle is executed with a jetting amount insufficient for the required jetting amount, at a determination timing of determining the necessity of execution of the dummy jet, for the nozzle of which a total jetting amount in the non-jettable period is less than the required jetting amount, the dummy jet is not executed in a case where a period from a printing start to a next jetting timing is equal to or greater than a period obtained by adding a determination interval to a period from the printing start to the determination timing.

An ink jet recording apparatus includes a charging electrode that charges ink particles ejected from a nozzle, a deflecting electrode that deflects the ink particles charged by the charging electrode, an operating unit that inputs and sets printing conditions for performing the printing, and a control unit, and the control unit receives a moving distance in a direction in which a printing target is conveyed from the operating unit, calculates the number of non-printing particles on the basis of the moving distance, and performs control for changing to a dot pattern in which the number of non-printing particles are inserted.

An ink jet recording apparatus I includes a printing head 1 configured to house, on the inside, a nozzle 12, a charging electrode 13, a deflection electrode 15, and a gutter 16, a maintenance-pattern storing unit 102b configured to store, respectively in association with types of abnormalities, a plurality of kinds of maintenance operations executable in the ink jet recording apparatus I, a flag storing unit 102a configured to store occurrence of an abnormality in the ink jet recording apparatus I as an error flag corresponding to a type of the abnormality, and a control unit 101 configured to select, based on the type of the abnormality corresponding to the error flag stored in the flag storing unit 102a, one maintenance operation out of the plurality of kinds of maintenance operations stored in the maintenance-pattern storing unit 102b and execute the maintenance operation.

A method of processing phase signals for continuous inkjet printing, said method comprising: providing at least one phase signal, wherein said at least one phase signal is an analogue signal; converting the at least one phase signal into at least one corresponding digitised phase signal; and processing said at least one digitised phasing signal, wherein the processing comprises extracting at least one predetermined phase parameter from the at least one digitised phasing signal when the at least one digitised phasing signal is a time-domain digitalised phase signal, and wherein the at least one predetermined phase parameter comprises one or more time-domain signal features of the at least one digitised phasing signal.

An inkjet recording device and a method for controlling an inkjet recording device are provided. A heating device that heats the ink to be supplied to a nozzle immediately ahead of the nozzle, a thermometer that detects a temperature of the ink inside the heating device or after heating, a viscometer that detects a viscosity of the ink in a main ink container are provided. The heating device is driven using a detection value of the thermometer to control the temperature of the ink such that the viscosity reaches an ink viscosity which enables normal printing, and when the viscosity of the ink is out of a range which enables printing, the solvent or the replenishment ink is supplied to the main ink container using a detection value of the viscometer such that the viscosity reaches the range which enables normal printing.

Provided is an inkjet recording device capable of facilitating cleaning of a print head, and easily recovering a solvent (cleaning liquid) that is used for cleaning.

An inkjet recording device includes a print head that receives a supply of ink to perform printing; and a main body that includes an ink container to contain the ink and a solvent container to contain a solvent, and that supplies the ink in the ink container to the print head. Further, the inkjet recording device includes a cleaning tank, a cleaning nozzle, and a recovery container. Then, the print head is set inside the cleaning tank, the solvent is sprayed from the cleaning nozzle to clean the print head, and the solvent after cleaning is recovered by the recovery container.

Techniques for operating an industrial printer include causing it to report data that indicates COO parameter values based on output sensors and/or component detection module configured to measure physical phenomena related to components of the printer referred to as COO parameters. The COO parameters values, which may include waste values, are derived and displayed in a graphical user interface dynamically on a real time basis. One or more graphical user interface is generated to present a one or more active areas to select the display of the COO parameter values in numeric and or graphical form or combinations thereof.