Canon Kabushiki Kaisha

Ricoh Company, Ltd.

Yoshinori Nakagawa

Osamu Iwasaki

Atsushi Takahashi

Tomoko Takahashi

Takatoshi Nakano

Takuya Fukasawa

Naoji Otsuka

Masaaki Yamada

Naomi Oshio

Hideki Kosugi

Satoshi Seki

Atsuhiko Masuyama

Yasuyuki Ishii

Minoru Teshigawara

Ichiro Kadota

Ryuji Yoshida

Kiichiro Takahashi

Hidehiko Kanda

Shuji Hirai

Tomoki Yamamuro

Jiro Moriyama

Tetsuya Edamura

Yasushi Nakazato

Hiroyuki Sugiyama

Satoshi Ouchi

Yuji Hamasaki

Kazuo Suzuki

Masataka Kato

Masaya Uetsuki

Masanori Horike

Toshimitsu Danzuka

Katsuaki Miyawaki

Nekka Matsuura

Shin Genta

Osamu Satoh

Hisashi Shoji

Hideki Zemba

Tsuyoshi Ibe

Taichi Urayama

Nobuaki Kondoh

Hiroshi Nakai

Masahiko Shakuto

Mikio Ishibashi

Naoyuki Ozaki

Nobuhiro Kitabatake

Shotaro Hoshi

Noriko Sato

Shunichi Hashimoto

Takamasa Ozeki

Nobuyuki Koinuma

Mugijirou Uno

Takashi Seto

Seiji Hoshino

Ryusuke Mase

Kei Yoshizawa

Takeo Tsukamoto

Hitoshi Nishikori

Satoshi Masuda

Hideaki Kanaya

Hitoshi Sugimoto

Atsushi Inoue

Atsushi Arai

Yuji Konno

Hitoshi Shimizu

Atsushi Kurokawa

Hiroaki Maeda

Yoshinori Nakajima

Yuhei Oikawa

Takahiro Kiuchi

Tatsuaki Orihara

Keisei Hakamata

Naomi Yamamoto

Yohichiroh Miyaguchi

Hiroki Atari

Yoshio Hattori

Masanori Kawasumi

Kazuhisa Sudo

Toshiaki Tokisawa

Katsuhiro Aoki

Shin Kayahara

Masanori Saitoh

Tsuyoshi Saeki

Katsuo Sakai

Seiji Ogasawara

Shuji Tanaka

Shigekazu Enoki

Yoshiyuki Fukuda

Sadayuki Iwai

Hideki Takayama

Eiichi Ohta

Fumiko Yano

Yasunobu Takagi

Takuya Suganuma

Ryoh Tanoue

Hideki Zenba

Shinji Minami

Ayako Iino

Ryota Kidera

Sho Akiyama

A printing apparatus comprises: a print head comprising, for each of a plurality of types of inks, an ejection opening and pressure chamber, and configured to perform printing operation by ejecting the ink from the ejection opening; a circulation unit capable of circulating the ink of each ink type; a determination unit configured to determine an accumulated time for which a first type of ink is circulated by the circulation unit in the printing operation using the first type of ink and not using a second type of ink different from the first type of ink; and a control unit configured to perform control based on the determined accumulated time to cause the circulation unit to circulate at least the second type of ink among the plurality of types of inks in a case where the accumulated time is longer than a predetermined time.

Printing apparatus and method of controlling printing apparatus

A printing apparatus includes a print head provided with a discharge port that discharges liquid and a pressure chamber filled with the liquid to be discharged from the discharge port, and configured to perform a printing operation by discharging the liquid from the discharge port based on print data, includes a circulation unit that performs circulation of the liquid in a circulation passage including the pressure chamber in a state where the printing operation is performed, and includes a control unit that controls the circulation unit to continue the circulation for a predetermined time after the printing operation is completed.

Printing apparatus

An object of the present invention is to bring a print head into a liquid ejectable state while reducing waste ink. The present invention is a printing apparatus including: a tank in which liquid is stored; a print head that comprises an ejection port surface on which an ejection port is formed, the ejection port ejecting the liquid which is supplied from the tank; a cap mechanism that caps the ejection port surface of the print head; a timer that counts a time during which the ejection port surface is capped; and a circulation unit configured to circulate the liquid in a circulation path including the tank and the print head, and in a case where the timer counts a predetermined time, the circulation unit circulates the liquid.

Printing apparatus, control method, and storage medium

Provided are an inkjet printing apparatus and a recovery method capable of suppressing ink thickening in the ejection openings in the suction process for the ejection openings. A vacuum wiper is moved being in contact with the ejection opening surface of the print head to perform a vacuum wiping process for the arrayed ejection openings sequentially. Ink is circulated in flow paths including the flow paths communicating with the ejection openings for which the vacuum wiping process has been finished.

Inkjet printing apparatus and recovery method

An inkjet printing apparatus is provided with a tank that stores ink, a print head that performs print operation by ejecting ink supplied from the tank, a circulation unit that establishes a circulating state to circulate ink in a circulation path if print operation is performed and establishes a stopped state to stop circulation of ink if print operation is terminated, and a deaeration unit that performs deaeration operation to deaerate ink inside the circulation path. The apparatus includes an estimation unit that estimates a dissolved gas amount in ink inside the circulation path based on dissolved gas amounts increased in the circulating state and in the stopped state, respectively, and a control unit that causes the deaeration unit to execute deaeration operation after completion of print operation if the dissolved gas amount estimated by the estimation unit exceeds a predetermined threshold.

Inkjet printing apparatus and method of controlling inkjet printing apparatus

Ink is circulated through a circulation flow path between a print head and an ink tank. Detection operation for detecting an ink ejection state in an ejection opening in the print head is performed. The ink circulation and the detection operation are simultaneously performed by performing the detection operation in response to a start of the ink circulation.

Inkjet printing apparatus and inkjet printing method

The inkjet printing apparatus includes: a printing unit to eject ink; a wiping unit capable of wiping an ejection opening surface by moving relative to the ejection opening surface with an opening, adapted to be in contact with the ejection opening surface, put in contact with the ejection opening surface; a suction unit connected to the wiping unit and configured to apply negative pressure to the ejection opening surface via the opening; a moving unit to move the wiping unit relative to the ejection opening surface; and a control unit to perform suction wiping operation by wiping the ejection opening surface with the wiping unit while applying negative pressure to the ejection opening surface. The control unit determines the timing to perform the suction wiping operation, and, according to the timing, determines a moving speed of the moving unit and a pressure value caused by the suction unit.

To normally perform a preliminary ejection after a cleaning process. Provided is a recording apparatus including: a recording head that includes an ejection component that ejects a liquid; a circulation unit configured to perform a circulation operation of circulating the liquid in a circulation route including the recording head; a cleaning mechanism that performs a cleaning process with respect to the recording head; and a preliminary ejection unit configured to perform a preliminary ejection operation of preliminarily ejecting the liquid from the ejection component. The cleaning mechanism performs the cleaning process in a state in which circulation of the liquid is stopped, and at least one of the circulation operation by the circulation unit and the preliminary ejection operation by the preliminary ejection unit is performed after the cleaning process.

Recording apparatus, control method, and storage medium

An inkjet printing apparatus includes a print head that ejects ink, a waste ink tank having an absorber that absorbs ink discharged from the print head. The inkjet printing apparatus further includes a counting unit that counts a waste ink amount discharged to the waste ink tank, a timer that measures an elapsed time from installation of the waste ink tank in the apparatus, an acquiring unit that acquires a waste ink retention amount by obtaining an evaporation amount from evaporation of waste ink retained in the waste ink tank based on the elapsed time and subtracting the evaporation amount from the waste ink amount, a notifying unit that notifies that the waste ink retention amount exceeds a threshold; and a setting unit that sets the threshold based on a waste ink evaporation rate calculated by using the evaporation amount and the waste ink amount.

Inkjet printing apparatus and determining method

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Kawasaki, Japan

Yoshinori Nakagawa