Abstract: Under the condition that common ink flow passages are formed for separately supplying inks to respective ejection opening arrays of an orifice plate, flow passage cross sectional areas of branched ink flow passages are set respectively according to ejection amounts of the respective ejection opening arrays.

Abstract: An ink-jet printing apparatus, a cap and an ejection recovery method can satisfactorily perform a recovery process for respective ejection openings having different ink flow resistances and permit down-sizing. The ink-jet printing apparatus includes a printing head having a plurality of ejection openings, a cap for covering the ejection opening face where a plurality of ejection openings of the printing head are formed, and a recovery unit for suctioning ink from the ejection openings covered by the cap. The ink-jet printing apparatus also includes a sealing member for sealing predetermined ejection openings among the plurality of ejection openings provided within the cap.

Abstract: An ink jet head includes a plurality of liquid flow paths for ejecting the ink; and a plurality of heat generating resistors for the respective liquid flow paths, the heat generating resistor being independently drivable; wherein adjacent ones of the heat generating resistors are spaced by not more than 8 microns.

Abstract: A printing apparatus which maintains excellent image quality even in a long printing operation. In printing, the number of ink droplets (number of printing dots: A) discharged from a printhead IJH is counted by each printing operation. The counted number is accumulated to the total number (B) of printing dots from a point where a previous recovery suction has been started. Next, the total number (B) of printing dots is compared with a predetermined threshold value (C). If B<C holds, the printing is continued. If B≦C holds, recovery suction using a suction unit 5015 is performed.

Abstract: Under the condition that common ink flow passages are formed for separately supplying inks to respective ejection opening arrays of an orifice plate, flow passage cross sectional areas of branched ink flow passages are set respectively according to ejection amounts of the respective ejection opening arrays.

Abstract: An ink-jet recording apparatus for forming an image by discharging ink from an ink discharging nozzle onto a recording medium includes a carriage which is moved for scanning along a pair of guide shafts, and a recording head having ink discharging nozzles arranged in a row. An ink chamber is integrally formed in the carriage, and a heater board is integrally mounted on the carriage so that the ink chamber communicates with the ink discharging nozzles. The guide shafts pass through both end portions of the carriage with the discharging nozzles therebetween so as to be orthogonal to the row of ink discharging nozzles. The ink-jet recording apparatus is applicable to a printer in a printer-containing camera.

Abstract: An ink jet head includes a plurality of liquid flow paths for ejecting the ink; and a plurality of heat generating resistors for the respective liquid flow paths, the heat generating resistor being independently drivable; wherein adjacent ones of the heat generating resistors are spaced by not more than 8 microns.

Abstract: An ink-jet printing apparatus, a cap and an ejection recovery method can satisfactorily perform recovery process for respective of ejection openings having different ink flow resistance and permit down-sizing. The ink-jet printing apparatus includes a printing head having a plurality of ejection openings and covering cap on the ejection opening face where a plurality of ejection openings of the printing head, and recovery means sucking ink in the ejection openings covered by the cap. The ink-jet printing apparatus also includes a sealing member for sealing predetermined ejection openings as a part of a plurality of ejection openings provided within the cap.

Abstract: A method for coupling a liquid jet head unit is to couple a liquid jet head unit for recording by discharging liquid to a recording medium with a head installation member capable of installing the head unit through an elastic member.

Abstract: A recording apparatus and method are disclosed wherein when it is determined that an estimated temperature of an outer wall of a recording head is above a first predetermined temperature, a recording operation is stopped until the temperature falls below a second predetermined safe temperature.

Abstract: In a print head of this invention, electricity-to-heat converters and a driver circuit for driving these electricity-to-heat converters in accordance with print data are formed on a single board. The board further includes an input/output interface circuit for receiving print data from an external apparatus, a CPU for controlling a printer apparatus, a ROM, a RAM, an A/D converter, a D/A converter, a timer, and the like, and also includes an external element driver for driving a mechanism portion of the printer apparatus.

Abstract: In a print head of this invention, electricity-to-heat converters and a driver circuit for driving these electricity-to-heat converters in accordance with print data are formed on a single board. The board further includes an input/output interface circuit for receiving print data from an external apparatus, a CPU for controlling a printer apparatus, a ROM, a RAM, an A/D converter, a D/A converter, a timer, and the like, and also includes an external element driver for driving a mechanism portion of the printer apparatus.

Abstract: A recording head having discharge portions for discharging multiple inks and liquid chambers in communication with said discharge portions, said recording head comprising an electrically conductive film provided tangentially with the ink on a part of a wall constituting said liquid chambers, and an electrical connection for electrically connecting to an ink jet recording apparatus on which said recording head is mounted, wherein said electrically conductive film and said electrically connection are connected to measure the resistance between said electrically conductive film and an electrode located within an ink storage portion.

Abstract: To record a monochromatic image and a color image with a suitable amount of ink, the ink jet apparatus sets an ejecting frequency of ink droplets in printing the monochromatic image with one recording head to be double an ejecting frequency in printing the color image with plural recording heads. Alternatively, scanning speed of recording heads in printing the color image with plural recording heads is set to be double the speed in printing the monochromatic image with one recording head. This assures that the maximum number of the ink droplets ejected within one pixel of the recording medium from recording heads in printing the monochromatic image is equal to the maximum number in printing the color image.

Abstract: An ink jet head includes a plurality of liquid flow paths for ejecting the ink; and a plurality of heat generating resistors for the respective liquid flow paths, the heat generating resistor being independently drivable; wherein adjacent ones of the heat generating resistors are spaced by not more than 8 microns.

Abstract: A downsized, low-cost, high-density printhead, a printing apparatus and a printing method using the printhead can be achieved. If the number of electrothermal transducers is N, a shift register is capable of storing print information corresponding to N/8 electrothermal transducers. First, print information corresponding to the capacity of the shift register is transferred to the printhead. Then, the shifting function of the shift register is stopped to hold the print information. A 3-bit selection signal is inputted from an input terminal as the print information information. The selection signal is sent to a time-divisional logical circuit, then N/8 electrothermal transducers are selected, and a printing operation based on the input data is performed. This operation is repeated eight times, to complete printing by all the N electrothermal transducers.

Abstract: An ink-jet printing apparatus can obtain good image quality and improve reliability by avoiding possibility of failure of the head. A target temperature, at which ejection of ink through an ink-jet printing head becomes the most stable is set. Also, a difference between the target temperature and an actual temperature of the ink-jet printing head is derived. When the difference is positive, the drive signal includes a pre-heating pulse and a main heating pulse having an interval therebetween. The pulse width or the interval is properly set. When the drive signal is negative, only the main heating pulse is included. When the absolute value of the difference is large, the pulse widths are set smaller. At this time, a drive frequency is lowered or a resting period at opposite end positions in the scanning directions is prolonged.

Abstract: A suction recovery mechanism for an ink jet recording apparatus for recording by selectively supporting a different ink jet recording head on a carriage includes a single cap member capable of covering the entire ink discharge port area of each of the different ink jet recording heads selectively supported on the carriage, and a suction mechanism communicating section provided for the cap member in order to perform suction recoveries of each of the ink jet recording heads selectively supported on the carriage. This suction mechanism communicating section is conductively connected with a suction mechanism for sucking ink retained in the cap member. With this arrangement, it becomes possible to widen the range of kinds of images which can be recorded by the apparatus.

Abstract: An ink jet head includes a plurality of liquid flow paths for ejecting the ink; and a plurality of heat generating resistors for the respective liquid flow paths, the heat generating resistor being independently drivable; wherein adjacent ones of the heat generating resistors are spaced by not more than 8 microns.

Abstract: To increase ink jet recording head responsivity and/or decrease recording head size, an ink jet recording apparatus is provided having plural liquid passages, each having an ejection outlet through which a droplet of liquid is ejected at the end of the liquid passage. Each of the passages is supplied with ink from only the other end. A common ink chamber contains the ink, and communicates with the liquid passages at different supply ports of the passages. Electrothermal transducer elements each have a planar heat generating element provided in each of the liquid passages, the electrothermal transducers being supplied with electric signals to produce a change in state of the ink involving the formation of a bubble in the liquid passage by thermal energy.