Riso Kagaku Corporation

Takahito Tojima

Sadanao Okuda

Takashi Isozaki

Ryuji Higa

Kenji Kudo

Akira Yasuda

Makoto Ishikawa

Masami Kanehira

A sheet-like object transporting device disclosed herein includes a transport plate having suction holes made penetrating therethrough, a fan that sucks in air through the suction holes, a belt that moves along an upper surface of the transport plate, and a controller. Width of the belt corresponds to width of the transport plate. The belt has an open zone whose form corresponds to a sheet-like object. A sheet-like object is loaded on the transport belt so as to close up the open zone. The belt is moved with the sheet-like object attracted onto it by suction. The sheet-like object is stably held onto the transport belt, contacting the peripheries of the open zone without misalignment, and is stably transported without moving out of position or upward. It is possible to transport a sheet-like object attracted onto the belt, while suppressing suction force wasting.

Sheet-like object transporting device and ink-jet printer

An inclined type kicker for pushing out a lowermost-layer corrugated cardboard sheet in a plurality of corrugated cardboard sheets stacked in a hopper toward a front gate disposed on the downstream side of a sheet transferring direction in the hopper includes: a push-out face for pushing out the lowermost-layer corrugated cardboard sheet toward a lower end opening side of the front gate in abutment against a rear end of the lowermost-layer corrugated cardboard sheet on the upstream side of the sheet transferring direction; and a rear end lift-up face which is obliquely formed such that the height is gradually increased toward the upstream side of the sheet transferring direction and adapted to lift upward the rear end side of the corrugated cardboard sheet located on the upper layer side of the lowermost-layer corrugated cardboard sheet with an operation of pushing out the lowermost-layer corrugated cardboard sheet.

Corrugated cardboard sheet feeder

A print image treatment device is formed of a supply device for holding an excess ink removing liquid, the excessive ink removing liquid not dissolving in a printing ink forming a print image and having a lower surface tension than that of the printing ink; a rotating contact member having an outer surface, on which the excessive ink removing liquid is supplied from the supply device; a facing member situated under the contact member for nipping and carrying a printing sheet between the contact member and the facing member, an excessive printing ink forming the print image on a printing sheet being transferred to the excessive printing ink removing liquid when the printing sheet contacts the contacting member; a cleaning device contacting the contact member for removing the excessive printing ink with the excessive ink removing liquid; and a separation device receiving the excessive ink removing liquid with the excessive printing ink. The excessive ink removing liquid is separated from the printing ink having been transferred from the printing sheet. The separation device includes a filter having the thickness and air-flow resistance indicated below:

Print image treatment device

A print image treatment device is formed of a contact member which is coated on the peripheral surface with an excessive ink removing liquid incompatible with printing ink for forming a print image and having a lower surface tension than the printing ink, and is rotated in a specific direction, a facing member which serves to bring the printed side of a printed paper into contact with the excessive ink removing liquid by feeding the printed paper nipped between the contact member and the facing member, a supply means for supplying the excessive ink removing liquid to the peripheral surface of the contact member, and a cleaning means which contacts the peripheral surface of the contact member. The angle of the cleaning means from the tangent line of the peripheral surface is within a range of 5 to 60 degrees.

A printed image after-processing apparatus includes a rotatable contact member coated with an excess ink removing liquid incompatible with a printing ink forming a printed image on a printing sheet and having a surface tension lower than that of the printing ink; a counter member having a surface roughness of 0.5 .mu.m or less, for feeding the printing sheet after printed between the counter member and the contact member to thereby make a printed surface of the printing sheet into contact with the contact member; a supplying device for supplying the excess ink removing liquid to the contact member; and a cleaning device contacting with the contact member.

Printed image after-processing apparatus

A printed image after-processing apparatus is formed of a contact member which is coated with an excess ink removing solution which is incompatible with the printing ink forming a printed image and has a lower surface tension than the printing ink, and driven to rotate the contact member having coefficient of dynamic friction with 1.5 or less; a counter member holding to convey printed paper between it and the contact member, to thereby bring the printed surface of the printed paper into contact with the excess ink removing solution on the contact surface: a supplying device for supplying the excess ink removing solution to the contact member; and a cleaning device which contacts the contact member.

Printing image after-processing apparatus

The print image device according to this invention is comprised of a rotatable member with an excessive ink removing liquid applied to the surface, which does not dissolve in a printing ink forming a print image and has a lower surface tension than that of the printing ink; a facing member for bringing a printed surface of a printed body into contact with the excessive ink removing liquid on the contact member by nipping and carrying the printed body having been printed between the contact member and the facing member; a supply device for supplying the excessive ink removing liquid to the contact member; and a cleaning device for removing the excessive ink removing liquid with the printing ink, sliding in contact with the contact member. Furthermore, a mixture of the excessive ink removing liquid and the printing ink is formed at an upstream position in the rotating direction, i.e. in a contact part formed by the contact member and cleaning means on the contact member, where the quantity of the excessive ink removing liquid is controlled to be larger than one third of that of the printing ink.

Disclosed is the print image treatment device formed of: a contact member on a surface of which an excessive ink removing liquid not dissolving in a printing ink forming a print image and having a lower surface tension than that of the printing ink is applied, the contact member being driven to rotate; a facing member for bringing a printed surface of a printing body into contact with the excessive ink removing liquid on the contact member by nipping and carrying the printing body having been printed between the contact member and the facing member; a supply device for supplying the excessive ink removing liquid to the contact member; and a cleaning device for removing an excessive ink with the excessive ink removing liquid. The nip width formed by the contact member and the facing member, which is defined as the dimension of the part with which the contact member and the facing member are in contact in the direction of the printing body being carried, is specified to be 0.5 mm or over.

An image forming apparatus includes a body equipped with an image forming device, a pick-up means provided in one part of the body for taking image forming sheets into the body, and a sheet feed unit releasably mounted on one part of the body for loading a plurality of sheets stacked and for pushing the sheets into the pick-up device.

Image forming apparatus and sheet feed unit

The occurrence of offsetting and strike-through in a stencil printing device is prevented without creating any new problems, and the printing paper is allowed to be conveyed with a pair of rollers interposing the printing paper for a reliable paper ejection process. Printing paper P is passed through a nip between a contact roller 37 and a counter roller 39 opposing the contact roller 37, the outer circumferential surface of the contact roller being coated with a layer of excess ink removing liquid which does not dissolve with the printing ink forming the printed image and has smaller surface tension than the printing ink, and the contact between the excess ink removing liquid layer a of the contact roller 37 and the printed surface of the printing paper P causes the excess portion of the printing ink b deposited on the printed image of the printing paper to be transferred onto the excess ink removing liquid layer a so as to remove the excess ink from the printing paper P. The contact roller may be replaced with an endless contact belt 83.

Growing community of inventors

Ibaraki-Ken, Japan

Takahito Tojima