Riso Kagaku Corporation

Yoshihisa Morita

Sayako Arai

Hirotaka Yamamoto

Ami Terakado

Shinji Tabuchi

Hitoshi Arai

Yoshiyuki Okada

Tomohiko Shimoda

Ryosuke Miyachi

Eiji Hori

Naoya Masuda

Masayoshi Sakamoto

Toru Sakabe

A conveyance device includes a conveyance path having a curved portion and a pair of conveyers which are disposed in the conveyance path and convey a medium while nipping it, wherein the medium enters the pair of conveyers in a state of being at least partially curved in the curved portion, and the conveyance path guides the medium toward one of the pair of conveyers.

Conveyance device

A sheet feed device includes: a conveyor configured to convey a top sheet of sheets floated from a sheet stack; a blower configured to blow air in an obliquely upward direction from a position lower than the conveyor toward the sheet stack; and a direction converter configured to convert a direction of the air blown by the blower to a direction which is downward more than a direction of the air at a position where the air is blown from the blower and let the air flow in between the top sheet and a second sheet subsequent to the top sheet of the sheets floated from the sheet stack.

Sheet feed device

A medium feeding apparatus includes: a placement mount on which a plurality of media are placed; a transportation mechanism that transports an uppermost medium of the plurality of media placed on the placement mount; a floating-air blowout mechanism that blows out air to float at least the uppermost medium; a suction mechanism that sucks air to cause the uppermost medium floated by the floating-air blowout mechanism blowing out air to be attracted to the transportation mechanism; and a floating-air control unit that causes the floating-air blowout mechanism to start to blow out air while the uppermost medium is being attracted to the transportation mechanism after starting to be transported by the transportation mechanism, so as to float at least a second medium located below the uppermost medium, and causes the floating-air blowout mechanism to stop blowing out air before the second medium starts to be transported by the transportation mechanism.

Medium feeding apparatus

A sheet supplying device includes: an air blow opening configured to blow air to a side portion of an uppermost part of stacked sheets; and a flow adjuster extending from above the air blow opening over an edge of a top sheet of the stacked sheets and configured to cause an air flow blown from the air blow opening to travel along an upper surface of the top sheet of the stacked sheets.

Sheet supplying device

A medium supply apparatus includes: a placement mount on which a plurality of media are placed; a transportation mechanism that transports an uppermost medium of the plurality of media placed on the placement mount; and an aspiration mechanism that aspirates air to attract the uppermost medium to the transportation mechanism, wherein the aspiration mechanism includes a blocking means for blocking air aspiration performed by the aspiration mechanism, in such a manner as to prevent another medium of the plurality of media that is located below the uppermost medium from being attracted to the transportation mechanism.

Medium supply apparatus

An inkjet printer includes: at least one inkjet head configured to eject ink to a sheet and print an image; at least one stiffening conveyor configured to convey the sheet toward the at least one inkjet head in a conveyance direction while stiffening the sheet by deforming the sheet into a wave shape in a width direction orthogonal to the conveyance direction; and at least one platen arranged to face the at least one inkjet head and having a protrusion, the protrusion provided on a surface of the at least one platen facing the at least one inkjet head and configured to support a convex portion in the wave shape of the deformed sheet, the at least one platen configured to support the sheet while keeping the sheet deformed in the wave shape.

Inkjet printer which stiffens sheet

A second inkjet head, a second platen, and a second pair of conveyance rollers configured to convey a sheet toward the second platen downward with respect to a horizontal direction are arranged at lower positions than a first inkjet head arranged upstream of the second inkjet head, a first platen arranged upstream of the second platen, a first pair of conveyance rollers arranged upstream of the second pair of conveyance rollers and configured to convey the sheet toward the first plates downward with respect to the horizontal direction, respectively.

Inkjet printing apparatus with pairs of conveyance rollers

Disclosed is an aqueous inkjet ink for a humidity-conditioning base material, the ink comprising at least a colorant, a water-dispersible resin and water, and the water-dispersible resin comprising at least one water-dispersible urethane resin and at least one water-dispersible (meth)acrylic resin or water-dispersible styrene/(meth)acrylic resin.

Aqueous inkjet ink for humidity-conditioning base material and method for producing decorated humidity-conditioning base material

Disclosed is an aqueous inkjet ink for a humidity-conditioning base material, the ink comprising water, a water-dispersible resin, a colorant, and at least one surfactant selected from among acetylene glycol-based surfactants and silicone-based surfactants.

A sheet ejection tray on which a sheet ejected from a sheet ejection port lands, includes: an inclined surface that becomes higher as farther from the sheet ejection port in a sheet ejecting direction; a projecting member that is provided in a region closer to the sheet ejection port than the position on which a leading end of the sheet having a dimension not smaller than a predetermined value lands and which has a guiding surface more inclined than the inclined surface; and an abutting cover that contacts a rear end of the sheet moving toward the sheet ejection port due to the inclination of the guiding surface. The leading end of the sheet passes above the projecting member before landing on the guiding surface. A portion of the sheet closer to the sheet ejection port than the leading end lands on the guiding surface.

Sheet ejection tray

An image forming apparatus includes a conveying device for conveying paper, an image forming unit for forming an image on the paper, and a paper discharge tray where the image-formed paper is discharged and loaded at a predetermined discharge angle by the conveying device. The conveying device is controlled in a manner that a discharge speed of a first sheet of the paper is different from a discharge speed of second and subsequent sheets of the paper.

Image forming apparatus

This paper feeder brings the uppermost paper sheet of a plurality of stacked paper sheets into contact with paper feed rollers and feeds out the paper sheet in a paper feeding direction by the drive thereof. Side fences for guiding both side edges of the paper sheet on a paper feeding table are provided with a pair of blowing units for blowing air to both side edges of the paper sheet, whose air quantity can be controlled independently of each other. When skewing occurs, the blowing units are controlled to blow a larger quantity of air to the paper side edge having larger friction against a lower paper sheet as compared with the quantity of air to the other paper side edge. In paper feeding, problems such as skewing, multi-feeding and idle feeding can be addressed.

Growing community of inventors

Ibaraki, Japan

Yoshihisa Morita