Toshiba Tec Kabushiki Kaisha

Hiroyuki Takada

Tadao Kamano

Yasuhiro Suzuki

Shinichiro Fujii

Takuro Ito

Takashi Kashiwagi

Sakae Shiida

Tsugio Narushima

Izumi Araki

Mitsuo Kubo

Akira Nuita

Hiroshi Yamaguchi

Hitoshi Ushiogi

Shigeru Morino

Hidenobu Suzuki

Hiroaki Watanabe

Kyouichi Shibata

An ink-jet printer includes a rotary drum for rotating at a constant speed, a sheet loader for loading a paper sheet onto the rotary drum a sheet holding system for holding the paper sheet loaded by the sheet loader on the rotary drum and a print head for printing an image by ejecting ink onto the paper sheet which is held on the rotary drum by the sheet holding system and rotated together with the rotary drum In particular, the sheet loader has a pair of loading rollers and for feeding the paper sheet while pinching the paper sheet, and a roller moving mechanism for separating the loading roller from the other loading roller to release the paper sheet after the leading edge of the paper sheet has been held on 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 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

Growing community of inventors

Mishima, Japan

Hiroyuki Takada