Toshiba Tec Kabushiki Kaisha

Takashi Kashiwagi

Tadao Kamano

Shinichiro Fujii

Yasuhiro Suzuki

Sakae Shiida

Hiroshi Yamaguchi

Hitoshi Ushiogi

Juntaro Oku

Masaaki Oyaide

Hidenobu Suzuki

Hiroyuki Takada

Takuro Ito

Tsugio Narushima

Akira Sato

Mitsuo Kubo

Izumi Araki

Akira Nuita

Shigeru Morino

Hiroaki Watanabe

Kyouichi Shibata

An ink-jet printer includes a rotary drum , having a dielectric peripheral surface , for rotating at a constant speed, a sheet loader for loading a sheet to the rotary drum , a sheet holding system for causing the sheet to be held on the peripheral surface of the rotary drum , and a print head section for printing an image on the sheet held on the peripheral surface of the rotary drum by jetting ink to the sheet while the rotary drum makes a predetermined number of rotations. Particularly, the sheet holding system includes a charging section and a supplementary charger section . The charging section is charges the peripheral surface of the rotary drum on an upstream side of the loading point where the leading end of the sheet loaded by the sheet loader contacts the peripheral surface of the rotary drum . The supplementary charger section charges the sheet to supplement the electrostatic attraction force attenuated during the rotation of the rotary drum

Ink-jet printer

An ink-jet printer includes a sheet feed-in mechanism,for feeding a paper sheet, a rotary drum,having a peripheral surface,of a size larger than the paper sheet to be fed by the sheet feed-in mechanism,, for rotating at a constant speed, a sheet holding system,for holding the paper sheet on the peripheral surface of the rotary drum, a print head,for printing an image by repeatedly ejecting ink onto the paper sheet held on the peripheral surface of the rotary drum,while the rotary drum,performs a predetermined number of rotations, a sheet separator,for separating the paper sheet from the peripheral surface,of the rotary drum, a sheet feed-out mechanism,for feeding out the paper sheet separated by the sheet separator,, a control unit,for controlling the sheet feed-in mechanism,, the rotary drum,, the sheet holding system,, the print head,, the sheet separator,and the sheet feed-out mechanism,. In particular, the control unit,is constructed such that the sheet holding system,, the print head,and the sheet separator,are sequentially driven on the basis of the number of rotations of the rotary drum

An ink-jet printer includes a rotary drum,, having a dielectric peripheral surface,for rotating at a constant speed, a sheet loader,for loading a sheet to the rotary drum,, a sheet holding system for causing the sheet to be held on the peripheral surface,of the rotary drum,, and a print head section,for printing an image on the sheet held on the peripheral surface,of the rotary drum,by jetting ink to the sheet while the rotary drum,makes a predetermined number of rotations. Particularly, the sheet holding system includes a charging section,and a supplementary charger section,. The charging section,charges the peripheral surface,of the rotary drum,on an upstream side of the loading point where the leading end of the sheet loaded by the sheet loader,contacts the peripheral surface,of the rotary drum,. The supplementary charger section,charges the sheet to supplement the electrostatic attraction force attenuated during the rotation of the rotary drum

An apparatus for holding a printing medium on a rotary drum, includes a rotary drum, a suction device, a medium holding mechanism and a medium removing device. The drum has a recess at its outer surface to extend along its rotation center line and rotates at a predetermined speed. A region of the outer surface, which is adjacent to a rearward end of the recess along the rotation direction, is smaller in the diameter than the remaining of the outer surface. The suction device holds by suction the medium onto the outer surface. The holding mechanism has a hook in the recess and selectively drives the hook between close and open positions. At the close position, the hook is placed over the adjacent region while being prevented from radially outwardly projecting from the remaining of the outer surface, and at the open position it is distanced from the adjacent region. When the medium arrives at the adjacent region, its leading end is held by the hook shifted from the open position to the close position and cooperated with the adjacent region and, when the drum rotates a specific number, the hook is returned to the open position. The removing device removes the medium from the outer surface when the drum rotates the specific number and the hook has moved from the close position to the open position.

Apparatus for holding a printing medium on a rotary drum and ink jet

An ink-jet printer includes a rotary drum for rotating at a constant speed and holding a paper sheet on its peripheral surface, a print head having ink-jet nozzles aligned in the axial direction of the rotary drum to perform printing by spitting ink from these ink-jet nozzles on the paper sheet rotating together with the rotary drum, and a sheet feed-in mechanism for feeding a paper sheet from a cassette and a manual feed tray to the rotary drum. Particularly, the sheet feed-in mechanism has a loading roller unit for loading the paper sheet to the rotary drum, a pickup section for picking up a paper sheet from one of the cassette and the manual feed tray to strike the leading end of the paper sheet against the loading roller unit, and a control section for controlling the loading roller unit to feed, to the rotary drum, the paper sheet whose posture has been corrected upon strike by the pickup section. The pickup section has a paper feed path which guides the paper sheet picked up from one of the cassette and the manual feed tray to the loading roller unit via a merging point, and has a bend accepting space located at the merging point for accepting a bend of the paper sheet.

Ink-jet printer controlling application of printing medium to a rotary

Growing community of inventors

Mishima, Japan

Takashi Kashiwagi