Sheet supplying apparatus and printing apparatus

Patent metadata

Field	Value
Publication number	US-2016137448-A1
Application number	US-201514939018-A
Country	US
Kind code	A1
Filing date	Nov 12, 2015
Priority date	Nov 19, 2014
Publication date	May 19, 2016
Grant date	—

Abstract

A trailing portion of a sheet drawn out of a sheet roll is discharged with a simple configuration. In a case where a trailing portion of the sheet is drawn out of the sheet roll, a driven roller is brought into press-contact with a core of the sheet roll via the trailing portion, whereby the trailing portion is discharged by utilizing the rotation of the core of the sheet roll.

First claim

What is claimed is:

1 . A sheet supplying apparatus that draws a sheet out of a sheet roll and supplies the sheet, the sheet supplying apparatus comprising:
a pressing unit having a roller configured to move according to a size of an outer diameter of the sheet roll, so as to be brought into press-contact with an outer periphery of the sheet roll, wherein in a case where all of the sheet is drawn out of the sheet roll, a trailing portion of the drawn sheet can be conveyed, while the trailing portion is held between a center portion of the sheet roll and the pressing unit, in a direction reverse to a direction in which the sheet is supplied.

2 . The sheet supplying apparatus according to claim 1 , further comprising:
a moving mechanism configured to move the pressing unit; a rotating mechanism configured to hold the center portion of the sheet roll and rotates the center portion; and a conveying mechanism configured to convey the drawn sheet, wherein after all of the sheet is drawn out of the sheet roll so that the trailing portion is separated from the center portion, the moving mechanism separates the pressing unit from the center portion, the conveying mechanism returns the sheet, the moving mechanism brings the pressing unit into press-contact with the center portion so as to hold the trailing portion between the pressing unit and the center portion, and then, the rotating mechanism is rotated in a direction reverse to a direction in which the sheet is supplied so as to feed out the trailing portion.

3 . The sheet supplying apparatus according to claim 1 , wherein the center portion is a core of the sheet roll, around which the sheet is wound.

4 . The sheet supplying apparatus according to claim 2 , further comprising:
a detecting unit configured to detect that the trailing portion of the sheet is drawn out of the sheet roll, wherein the moving mechanism and the rotating mechanism operate based on a result detected by the detecting unit.

5 . The sheet supplying apparatus according to claim 1 , wherein the pressing unit is brought into press-contact with the outer periphery of the sheet roll from under in a gravity direction.

6 . The sheet supplying apparatus according to claim 1 , wherein the pressing unit is provided with a plurality of rollers each being roller brought into contact with the outer periphery of the sheet roll.

7 . The sheet supplying apparatus according to claim 1 , wherein the pressing unit is provided at a moving member that is movable according to the size of the outer diameter of the sheet roll, and
the moving member includes a lower guide that guides the trailing portion to be inserted between the center portion and the pressing unit.

8 . The sheet supplying apparatus according to claim 7 , wherein a discharge path, through which the trailing portion inserted between the center portion and the pressing unit passes, is formed in such a manner as to be located above the lower guide.

9 . A printing apparatus comprising:
a sheet supplying apparatus that draws a sheet out of a sheet roll and supplies the sheet, the sheet supplying apparatus including a pressing unit configured to move according to a size of an outer diameter of the sheet roll so as to be brought into press-contact with an outer periphery of the sheet roll, wherein in a case where all of the sheet is drawn out of the sheet roll, a trailing portion of the drawn sheet can be conveyed, while the trailing portion is held between a center portion of the sheet roll and the pressing unit, in a direction reverse to a direction in which the sheet is supplied; and a print unit that prints an image on the supplied sheet.

10 . The printing apparatus according to claim 9 , further comprising a cutter configured to cut the sheet.

11 . The printing apparatus according to claim 10 , wherein the cutter cuts the trailing portion in a short length before the trailing portion is conveyed in a direction in which the trailing portion is inserted between the center portion and the pressing unit.

Assignees

• Canon Kk

Inventors

• Sumioka Masaki

Classifications

• B65H16/106

  in which power is applied to web roll · CPC title

• B65H43/02 Primary

  detecting, or responding to, absence of articles (B65H43/08 takes precedence) · CPC title

• B65H19/10 Primary

  in unwinding mechanisms or in connection with unwinding operations · CPC title

• B41J15/04 Primary

  Supporting, feeding, or guiding devices; Mountings for web rolls or spindles · CPC title

• B65H2404/512

  concave · CPC title