Duplo Seiko Corporation

Seiko Epson Corporation

Kazuya Yamamoto

Yoshihide Sugiyama

Katsunori Takahashi

Akira Kawaguchi

Hidemasa Kanada

Nobuki Tanimoto

Junichi Kakuta

A sheet of paper is reliably held by suction at the front and rear of a turn guide on the transport path of the sheet according to paper transport conditions.

Paper inverting device

There is provided a sheet inverting and conveying mechanism for conveying a sheet in a first direction, inverting obverse and reverse sides of the sheet, and then conveying the inverted sheet in a second direction. The mechanism includes: a first conveyance section for receiving, at its conveyance face, one side of the sheet, and for conveying the sheet in the first direction; a sheet inverting section for receiving, at its bent inner peripheral face, one side of the sheet, and for inverting the sheet while bending the sheet along the bent inner peripheral face; and a second conveyance section for receiving, at its conveyance face, one side of the inverted sheet, and for conveying the sheet in the second direction, wherein the first conveyance section and the second conveyance section are formed so that the sheet is conveyed while being attracted to the conveyance faces.

Sheet inverting and conveying mechanism and sheet inverting and conveying apparatus

When a sheet of paper is inverted and the direction is changed, members such as a roller do not come into contact with the printed surface of the sheet and it is possible to prevent smudges by eliminating an ink stain on a surface of the sheet.

A turn guide is disposed between a first transport surface and a second transport surface on which a sheet is transported while being sucked. The turn guide has a plurality of guide ribs. The plurality of guide ribs have curved inverting transfer surfaces from an inversion start point corresponding to a first transport surface to an inversion end point corresponding to a second transport surface.

Paper transport apparatus with inverting turn guide having range of curvature radius

Provided is a sheet inverting apparatus wherein members, such as a roller, are not brought into contact with the printed surface of a sheet at all, and the occurrence of dirt can be prevented by eliminating friction of ink on the surface of the sheet. A first transport apparatus and a second transport apparatus each have a plurality of transport belts which move on transport tracks along sheet transport directions and a suction box which sucks the sheet on the transport belts through suction holes formed on the transport belts. A turn guide arranged between the first transport apparatus and the second transport apparatus has a plurality of guide ribs disposed between the transport belts. Each of the guide ribs coming into slidable contact with the sheet forms a curved inverting transfer surface from an inversion starting point side to an inversion end point side.

Sheet transport apparatus

A double-sided image forming device includes: a paper feeding section (); a printing section (); a first conveyance route () for conveying a fed paper sheet () to a paper discharge section () via the printing section (); and a second conveyance route () for receiving, on its conveyance surface, the paper sheet (), a first side () of which has been printed, from the first conveyance route (), and for conveying the paper sheet () while reversing it, thereby conveying the paper sheet () to the upstream side of the printing section () in the conveyance direction of the first conveyance route (), wherein the second conveyance route () has a reverse conveyance route () for receiving, on its conveyance surface, a second side () of the paper sheet (), and for conveying the paper sheet () while reversing it, and wherein the reverse conveyance route () is formed by a combination of a plurality of reverse mechanisms each including: a first conveyance section () for linearly conveying the paper sheet (); a reverse section () for reversing the conveyed paper sheet () while bending it along a curved inner peripheral surface; and a second conveyance section () for linearly conveying the reversed paper sheet ().

Growing community of inventors

Kinokawa, Japan

Kazuya Yamamoto