Canon Kabushiki Kaisha

Minoru Teshigawara

Kiichiro Takahashi

Naoji Otsuka

Osamu Iwasaki

Yoshiaki Murayama

Tetsuya Edamura

Akiko Maru

Hitoshi Nishikori

Takatoshi Nakano

Satoshi Seki

Toshiyuki Chikuma

Takeshi Murase

Satoshi Azuma

Susumu Hirosawa

Kentarou Muro

Masao Kato

Shigeyasu Nagoshi

Takeshi Yazawa

Minako Kato

Yutaka Kano

Yoshinori Nakagawa

Hiroshi Taira

Naomi Oshio

Takuya Fukasawa

Hitoshi Sugimoto

Atsushi Sakamoto

Rinako Kameshima

Hiroyuki Saito

Masahiko Umezawa

Jun Yasutani

Atsushi Takahashi

Tetsuya Ishikawa

Haruyuki Yanagi

Kentaro Onuma

Yoshiyuki Honda

Shinsuke Ikegami

Kaneji Yamada

Hidehiko Kanda

Norihiro Kawatoko

Koichiro Kawaguchi

Masashi Hayashi

Takaaki Ishida

Kei Kosaka

Shuichi Tokuda

Toshiro Yoshiike

Akitoshi Yamada

Seiji Suzuki

Fumitaka Goto

Mitsuhiro Ono

Yoshinori Misumi

Tomokazu Ishikawa

Eisuke Nishitani

Koichi Tanno

Yugo Mochizuki

Shinichi Omo

Masaki Nitta

Naoji Ohtsuka

Keiichirou Takeuchi

Kentaro Muro

Takuya Hamada

Yuki Sawai

Shinichi Yukiura

Takahide Takeishi

Nobutaka Ukeji

Naoiji Otsuka

An inkjet printing apparatus includes a discharge head including orifices that discharge ink, a channel communicating with the orifices, a heating element that generates thermal energy for discharging the ink in the channel, a protection layer having a surface exposed to the channel and covering the heating element, and an electrode having a surface exposed to the channel; a tank that stores the ink to be supplied to the discharge head; an ink circulation unit that performs a circulation operation of circulating the ink between the discharge head and the tank; and a kogation removal unit that performs a removal operation of removing kogation generated around the heating element by applying a voltage between the protection layer and the electrode. The kogation removal unit performs the removal operation after the circulation operation is stopped.

Inkjet printing apparatus and control method thereof

A recording apparatus includes an ink application unit configured to apply ink to a transfer body, a first application unit configured to apply a first treatment liquid over an area on the transfer body, a second application unit configured to apply a second treatment liquid to the transfer body, a heating unit configured to heat the second treatment liquid applied to the transfer body, and a transfer unit configured to transfer the ink image, wherein a ratio of the second treatment liquid to the first treatment liquid on an outside of ink portion is determined according to the recording medium.

Recording apparatus and recording method

Control modes for controlling recovery operation and printing operation of an ejection head in relation to each other include first and second control modes that can be selected according to a viscosity of liquid. In such control modes, different recovery operations are set.

Printing apparatus and printing method

Provided are an inkjet printing apparatus and a recovery processing method which can suppress occurrence of defective ejection and can suppress an ink consumption amount. For that purpose, information relating to a condensation degree of ink is obtained, and ejection operation is made in accordance with the obtained condensation degree of ink.

Inkjet printing apparatus and recovery processing method

An inkjet printing apparatus and its control method which can suppress defective ejection and wasteful ink consumption are provided. For that purpose, pigment density Nof the ink in a circulation path is calculated, and the ink in the circulation path is discharged on the basis of the pigment density N.

Inkjet printing apparatus and control method

A control apparatus includes an application unit, a conveyance unit, a stacking member, a pressing member, and a control unit. The application unit applies a recording agent to a recording medium, which then is conveyed by the conveyance unit. The stacking member stacks sequentially conveyed recording media with a surface of the recording media to which the recording agent is applied facing up. The pressing member presses the sequentially stacked recording media. The control unit controls timing at which the pressing member contacts the recording media. The pressing member presses an upper surface of the stacked recording medium. The control unit controls the timing at which the pressing member contacts a recording medium when the recording medium has been stacked on the uppermost recording medium, based on data for applying the recording agent to a predetermined area, on the recording medium, including an area which the pressing member can contact.

Control apparatus and control method

An ink jet recording apparatus includes a recording head having a nozzle arrangement region in which a plurality of nozzles for discharging ink is arranged, and a cleaning unit configured to perform cleaning operation on the recording head. A control unit is configured to control the cleaning unit and a change operation for changing relative position relation between a region where the record medium passes and the nozzle arrangement region. The control unit acquires end passage positions in a first recording operation before the change operation is performed, and a passage region in a second recording operation after the change operation is performed. The control unit performs control for executing the cleaning operation in a case where the end passage position is included in the passage region.

Ink jet recording apparatus and cleaning method thereof

An inkjet printing apparatus according to the present invention includes a first printing head that performs a first printing operation by discharging ink onto the printing medium, a second printing head positioned downstream from the first printing head in a transport direction and performing a second printing operation by discharging ink onto the printing medium, and a preliminary discharge controller that causes the second printing head to perform a preliminary discharging operation that does not contribute to the second printing operation, wherein the preliminary discharge controller causes an ink discharge amount of the preliminary discharging operation of the second printing head to be smaller when an ink discharge amount of the first printing operation is greater than or equal to a predetermined value than when the ink discharge amount of the first printing operation is less than the predetermined value.

Inkjet printing apparatus and method for controlling inkjet printing apparatus

Printed products can be efficiently sorted into non-defective ones and defective ones even when a discharge failure occurs during the printing operation. Two inspection patterns for detecting discharge failure are printed before and after a plurality of images. The inspection patterns are read to determine the type of discharge failure. Printed media are sorted based on whether it is determined that there is a continuous discharge failure, whether it is determined that there is an accidental discharge failure, or whether it is determined that the discharge is normal.

Multiple test pattern printing using each of multiple printing element arrays are read, and in a case where a streak is present in predetermined test patterns of the multiple test patterns at the same position in the direction of the array of the printing elements, determination is made that the streak is not due to failure of a printing element.

Image processing method and image processing apparatus

Printing an image on a printing medium includes using a print head that ejects a first ink and a second ink having higher lightness than the first ink with preliminary ejection that is performed in a predetermined area in which the image is to be formed in order to maintain an ink ejection state of the print head and that does not contribute to printing of the image, wherein dots of the first ink and dots of the second ink formed in the predetermined area by the preliminary ejection are printed so as to be superposed on each other.

Printing method, printing apparatus, and computer-readable storage medium

The ink jet printing apparatus, wherein, to print images on a printing medium, a plurality of print heads, each of which includes an ejection port array provided by arranging multiple ink ejection ports in a widthwise direction of the printing medium, are arranged in a conveying direction of the printing medium, including: a unit for detecting a printing position displacement with respect to a printing position of a reference print head on the printing medium for each of remaining print heads excluding the reference print head which is one of the plurality of print heads; and a unit for adding non-image data corresponding to the printing position displacement to print data to be printed by the plurality of print heads, so as to align the printing positions of the plurality of print heads.

Ink jet printing apparatus and control method thereof

One aspect of this invention is directed to suitable drive control in accordance with an output from the temperature sensor of a printhead. More specifically, a printing apparatus by using a printhead that includes heaters and a temperature sensor on a substrate and discharges ink by driving the heaters executes the following steps. First, when printing a test pattern by using a predetermined driving pulse in a maintenance mode, a detected temperature is stored as a reference temperature in a memory. Then, in a normal printing mode, the difference between a detected temperature and the stored reference temperature is calculated, and a driving pulse for driving the printhead is selected from a plurality of driving pulses based on the difference. The printhead is controlled to be driven using the selected driving pulse and print.

Printing apparatus and control method thereof

To provide an ink jet printing apparatus which can reduce waste ink as much as possible and shorten the amount of time spend on the following wiping process, and a recovery operation method therefor, whereby a first process and a second process are carried out, the first process for discharging ink that does not contribute to the printing from the print head while supplying ink from the ink reservoir portion to the print head by way of the first ink passage connected to one end of the print head, and the second process for discharging ink that does not contribute to the printing from the print head while supplying ink from the ink reservoir portion to the print head by way of the second ink passage connected to the other end of the print head.

Printing apparatus and method for controlling printing apparatus

The present invention provides an ink jet printing apparatus and an ink jet printing method which are based on the multi-pass printing method using a print head having a plurality of nozzle rows and which enables a reduction in the number of nozzles to be simultaneously driven, allowing ink to be stably ejected. On the basis of the multi-pass printing method of dividing print data into a plurality of pieces by using mask patterns, the mask patterns are offset according to the positional relationship between the plurality of nozzle rows in the print head.

Ink jet printing apparatus and ink jet printing method

Growing community of inventors

Saitama, Japan

Minoru Teshigawara