US 11,794,495 B2
Inkjet printing apparatus and printing method with conveying print medium in first direction and second direction and with control of nip of conveyance rollers
Masataka Kato, Kanagawa (JP); Kazuhiko Sato, Tokyo (JP); Kazuo Suzuki, Kanagawa (JP); Yoshinori Nakajima, Kanagawa (JP); Mitsutoshi Nagamura, Tokyo (JP); Shin Genta, Kanagawa (JP); Satoshi Azuma, Tokyo (JP); Shingo Nishioka, Kanagawa (JP); Sae Mogi, Kanagawa (JP); Taku Yokozawa, Kanagawa (JP); Noboru Kunimine, Tokyo (JP); Akiko Aichi, Tokyo (JP); Hiroshi Taira, Tokyo (JP); Hiroto Kango, Tokyo (JP); and Hiroshi Kawafuji, Tokyo (JP)
Assigned to Canon Kabushiki Kaisha, Tokyo (JP)
Filed by CANON KABUSHIKI KAISHA, Tokyo (JP)
Filed on Nov. 29, 2021, as Appl. No. 17/536,186.
Application 17/536,186 is a continuation of application No. PCT/JP2020/020223, filed on May 22, 2020.
Claims priority of application No. 2019-104719 (JP), filed on Jun. 4, 2019; and application No. 2019-117137 (JP), filed on Jun. 25, 2019.
Prior Publication US 2022/0080747 A1, Mar. 17, 2022
Int. Cl. B41J 11/00 (2006.01); B41J 13/00 (2006.01); B41J 29/393 (2006.01); B41J 11/42 (2006.01)
CPC B41J 11/008 (2013.01) [B41J 11/009 (2013.01); B41J 11/0035 (2013.01); B41J 11/42 (2013.01); B41J 13/0045 (2013.01); B41J 29/393 (2013.01)] 14 Claims
OG exemplary drawing
 
1. An inkjet printing apparatus comprising:
a pair of conveyance rollers configured to convey a print medium in a first direction and a second direction opposite to the first direction;
a print head, provided downstream of the pair of conveyance rollers in the first direction, the print head being configured to print an image by ejecting ink; and
a control unit configured to control the print head and the pair of conveyance rollers to print an image in a unit region of the print medium by performing a first print operation and a second print operation, the first print operation being an operation of printing to the unit region by conveying the print medium in the first direction, and the second print operation being an operation of printing on the unit region by conveying the print medium in the second direction,
wherein the control unit (1) selects a print mode among (a) a first print mode in which the pair of conveyance rollers nips the unit region where ink has been ejected and (b) a second print mode in which the pair of conveyance rollers does not nip the unit region where ink has been ejected, and (2) performs the selected print mode.