Sheet processing apparatus

Patent metadata

Field	Value
Publication number	US-2016347569-A1
Application number	US-201615159691-A
Country	US
Kind code	A1
Filing date	May 19, 2016
Priority date	May 25, 2015
Publication date	Dec 1, 2016
Grant date	—

Abstract

According to an embodiment, a sheet processing apparatus includes a transport unit and a holding unit. The transport unit transports a first sheet to a first position. The transport unit transports a second sheet, which is transported after the first sheet, to a second position displaced to the upstream side of a sheet transport direction relative to the first position. The transport unit transports a third sheet, which is transported after the second sheet, to a third position displaced to the downstream side of the sheet transport direction relative to the second position. In the case where the second sheet is transported to the second position, the holding unit holds the first sheet at the first position. In the case where the third sheet is transported to the third position, the holding unit holds the second sheet at the second position.

First claim

What is claimed is:

1 . A sheet processing apparatus, comprising:
a transport unit that transports a first sheet to a first position, the first sheet being transported first, superimposes a second sheet on the first sheet and transports the second sheet to a second position, the second sheet being transported after the first sheet, the second position being displaced to an upstream side of a sheet transport direction relative to the first position, and superimposes a third sheet on the second sheet and transports the third sheet to a third position, the third sheet being transported after the second sheet, the third position being displaced to a downstream side of the sheet transport direction relative to the second position; and a holding unit that holds the first sheet at the first position when the transport unit transports the second sheet to the second position, and holds the second sheet at the second position when the transport unit transports the third sheet to the third position.

2 . The sheet processing apparatus according to claim 1 , further comprising
a sheet transport path that guides the transported sheet toward the transport unit and the holding unit, the sheet transport path including a sheet transport surface that guides the transported sheet.

3 . The sheet processing apparatus according to claim 2 , wherein
the holding unit includes a presser member that is openable and closable with respect to the sheet transport surface, the presser member pressing the first sheet located at the first position and the second sheet located at the second position toward the sheet transport surface.

4 . The sheet processing apparatus according to claim 3 , wherein
the presser member presses the first sheet and the second sheet toward the sheet transport surface in a state where the second sheet is superimposed on the first sheet.

5 . The sheet processing apparatus according to claim 3 , wherein
the presser member is opened with respect to the sheet transport surface by separating from the sheet transport surface, and the transport unit transports the first sheet in the opposite direction to the sheet transport direction in an opened state of the presser member, to insert the first sheet between the sheet transport surface and the presser member.

6 . The sheet processing apparatus according to claim 5 , wherein
the holding unit includes a friction member that is capable of holding the first sheet, and the transport unit transports the second sheet in the opposite direction to the sheet transport direction in a state where the presser member is separated from the sheet transport surface and in a state where the first sheet is held at the first position by the friction member, to insert the second sheet between the sheet transport surface and the presser member.

7 . The sheet processing apparatus according to claim 6 , wherein
the friction member includes an outlet roller, the outlet roller being provided near an outlet portion of the sheet transport path and being rotatable, and the outlet roller holds the first sheet at the first position by regulation of a rotation thereof.

8 . The sheet processing apparatus according to claim 3 , further comprising
a standby tray that holds the first sheet, the second sheet, and the third sheet in a mutually overlapping manner to keep the first sheet, the second sheet, and the third sheet waiting, wherein the sheet transport path is located on an upstream side of the standby tray, a part of the first sheet remains in the sheet transport path in a state where the first sheet is located at the first position, a part of the second sheet remains in the sheet transport path in a state where the second sheet is located at the second position, and the presser member is provided to the sheet transport path and holds the first sheet and the second sheet within the sheet transport path.

9 . The sheet processing apparatus according to claim 8 , wherein
the sheet transport path has a space narrower than a sheet holding space of the standby tray in a sheet thickness direction.

10 . The sheet processing apparatus according to claim 3 , wherein
the presser member is provided within the sheet transport path.

11 . The sheet processing apparatus according to claim 8 , wherein
the presser member is movable between an opened position in which the presser member closes the sheet transport path and the first sheet and the second sheet can be inserted between the sheet transport surface and the presser member, and a closed position in which the presser member opens the sheet transport path and the first sheet and the second sheet are sandwiched between the sheet transport surface and the presser member.

12 . The sheet processing apparatus according to claim 11 , wherein
a part of the third sheet remains in the sheet transport path in a state where the third sheet is located at the third position, and when the third sheet is transported to the third position, the presser member permits movement of the third sheet in the sheet transport path and is movable to a release position in which holding of the first sheet and the second sheet is released.

13 . The sheet processing apparatus according to claim 7 , wherein
the friction member includes a rotation regulation unit, the rotation regulation unit regulating rotation of the outlet roller to make the outlet roller unrotatable, and the outlet roller includes a friction member in at least a circumferential surface thereof.

14 . The sheet processing apparatus according to claim 13 , wherein
the rotation regulation unit includes an electromagnetic clutch that makes the outlet roller unrotatable.

Assignees

• Toshiba Kk
• Toshiba Tec Kk

Inventors

• Taki Hiroyuki
• Terao Yasunobu

Classifications

• G03G15/6529 Primary

  Transporting (G03G15/6555 takes precedence) · CPC title

• B65H31/24

  multiple or compartmented, e.d. for alternate, programmed, or selective filling · CPC title

• B65H29/6609 Primary

  forming an overlapping stream (by separation of articles from a pile B65H5/24) · CPC title

• B65H37/04 Primary

  for securing together articles or webs, e.g. by adhesive, stitching or stapling (adhering replacement to expiring web during change of web roll B65H19/18) · CPC title

• B65H2408/121

  stationary stapler · CPC title