Canon Kabushiki Kaisha

Takahide Onuma

Yasunori Saito

Tetsuji Kurata

Seiji Ogasawara

Masakazu Tsukuda

Masahiko Kubota

Yoshinori Itoh

Nobuhito Yamaguchi

Hiroshi Arimizu

Arihito Miyakoshi

Yusuke Imahashi

Yuki Emoto

Masashi Ito

Keisuke Arita

Satoru Nitobe

Yasunori Matsumoto

A printing apparatus includes a conveyance unit to convey a print medium, a belt, a tensioner, and a control unit. The belt transmits a driving force of a drive unit to the conveyance unit. The tensioner is displaceable and makes pressure contact with the belt to generate tension. The control unit controls driving of the drive unit in a state where the tensioner is in pressure contact with the belt. The control unit performs first control in which the drive unit is driven with a first control value, which is not based on a driving amount detected by a detection unit. Where the detection unit detects the driving amount, the control unit subsequently performs second control in which the drive unit is driven with a second control value, which is based on the driving amount detected by the detection unit.

Printing apparatus and conveyance apparatus

A platen includes: a supporting portion that can support a sheet; a suction unit that sucks the sheet in such a manner as to attach the sheet to the supporting portion; a first ink receiver that receives ink ejected downstream of the leading end of the sheet passing the supporting portion; and a second ink receiver that receives ink ejected upstream of the trailing end of the sheet passing the supporting portion.

Printing apparatus and platen

A platen includes a plurality of supporting portions capable of supporting a sheet; negative pressure chambers, to which a negative pressure is supplied, so as to suck a sheet facing the supporting portions to the supporting portions; and an ink receiver that receives ink ejected from a printhead to the outside of the sheet supported by the supporting portions. The plurality of supporting portions are arranged in a sheet width direction transverse a sheet conveyance direction. The plurality of negative pressure chambers are disposed in a manner corresponding to the plurality of supporting portions, respectively.

A printing apparatus includes a suction unit configured to allow a negative pressure, by which a sheet is sucked to a supporting portion, to act on the sheet; and ink receivers configured to receive ink ejected outside of the sheet. Waste ink ejected to the ink receivers is guided to a waste ink discharge port formed on an outer peripheral wall of a platen through waste ink channels. A sheet sucking mechanism configured to apply the negative pressure is disposed adjacent to the suction unit. A discharging mechanism configured to forcibly discharge waste ink outside of the platen is connected to the waste ink discharge port.

A platen includes: a plurality of supporting portions capable of supporting a sheet; negative pressure chambers, to which a negative pressure is supplied, so as to suck a sheet facing the supporting portions to the supporting portions; and ink receiver and that receive ink ejected from a printhead to the outside of the sheet supported by the supporting portions. The plurality of supporting portions are arranged in a sheet width direction (i.e., an X direction) transverse a sheet conveyance direction. The plurality of negative pressure chambers are disposed in a manner corresponding to the plurality of supporting portions, respectively.

Growing community of inventors

Kawasaki, Japan

Takahide Onuma