Feeding apparatus, printing apparatus, and control method of feeding apparatus

Patent metadata

Field	Value
Publication number	US-2021284476-A1
Application number	US-202117197433-A
Country	US
Kind code	A1
Filing date	Mar 10, 2021
Priority date	Mar 12, 2020
Publication date	Sep 16, 2021
Grant date	—

Abstract

An apparatus includes a first drive unit configured to rotate a roll sheet supported by a roll support unit in a predetermined rotation direction to feed the sheet into a conveyance path, an abutment portion provided so as to be capable of abutting against an outer peripheral surface of the roll sheet at a first position, and a rotation member provided so as to be capable of abutting against the outer peripheral surface at a second position. The first drive unit rotates the roll sheet in the direction to introduce, into the conveyance path, a leading edge of the sheet having passed between the first and second positions. The apparatus further includes a second drive unit configured to rotate the rotation member in a direction in which a slack of the sheet is formed between the first and second positions.

First claim

What is claimed is:

1 . A feeding apparatus comprising
a roll support unit configured to rotatably support a roll sheet which is a sheet wound into a roll form, a first drive unit configured to rotate the roll sheet supported by the roll support unit in a predetermined rotation direction to feed the sheet into a conveyance path, an abutment portion provided so as to be capable of abutting against an outer peripheral surface of the roll sheet at a first position, and a rotation member provided so as to be capable of abutting against the outer peripheral surface at a second position different from the first position, wherein the first drive unit rotates the roll sheet in the predetermined rotation direction to introduce, into the conveyance path, a leading edge of the sheet having passed between the first position and the second position, and the apparatus further comprises a second drive unit configured to rotate the rotation member in a direction in which a slack of the sheet is formed between the first position and the second position.

2 . The apparatus according to claim 1 , wherein
the first position and the second position are set such that the leading edge of the sheet is introduced into the conveyance path by passing between the first position and the second position, and the second position is set at a position spaced apart from the first position in the predetermined rotation direction, and when the leading edge of the sheet is introduced into the conveyance path, the second drive unit rotates the rotation member in the direction, in which the slack of the sheet is formed between the first position and the second position, until the leading edge passes the second position.

3 . The apparatus according to claim 1 , wherein
the abutment portion includes at least one free rotation member configured to rotate following rotation of the roll sheet.

4 . The apparatus according to claim 1 , wherein
when the leading edge of the sheet is introduced into the conveyance path, the second drive unit rotates the rotation member by an amount corresponding to one rotation of the roll sheet.

5 . The apparatus according to claim 1 , further comprising
a first detection unit configured to detect that the leading edge of the sheet has passed the second position, wherein the second drive unit stops rotation of the rotation member based on a detection result of the first detection unit.

6 . The apparatus according to claim 1 , further comprising
a second detection unit configured to detect the leading edge on the outer peripheral surface of the roll sheet before the leading edge of the sheet is introduced into the conveyance path, wherein based on a detection result of the second detection unit, the first drive unit rotates the roll sheet such that the leading edge is located at a position spaced apart from the second position in the predetermined rotation direction.

7 . The apparatus according to claim 1 , further comprising
a support member configured to support the rotation member, wherein the support member includes a guide portion configured to guide the sheet to the conveyance path, and the rotation member is supported in one end of the guide portion on a side of the roll sheet.

8 . The apparatus according to claim 7 , wherein
the rotation member is supported at a position on the guide portion biased in a widthwise direction of the sheet, and the end portion of the guide portion on the side of the roll sheet is inclined in the widthwise direction from a side close to the rotation member toward a side far from the rotation member so as to be separated from the roll sheet.

9 . The apparatus according to claim 7 , wherein
the support member includes a third drive unit configured to cause a pivot to a working position where the rotation member abuts against the outer peripheral surface of the roll sheet and a pivot to a retreat position where the rotation member is separated from the outer peripheral surface of the roll sheet, wherein the third drive unit causes the support member to pivot from the retreat position to the working position when the leading edge of the sheet is introduced into the conveyance path, and causes the support member to pivot from the working position to the retreat position after the leading edge has been introduced into the conveyance path.

10 . The apparatus according to claim 9 , wherein
the second drive unit and the third drive unit includes a motor as a common driving source, if the motor is rotated in one direction, the support member pivots to the working position and the rotation member rotates in the direction in which the slack of the sheet is formed, and if the motor is rotated in a reverse direction, the support member pivots to the retreat position.

11 . The apparatus according to claim 1 , further comprising
a cover member configured to cover the roll sheet supported by the roll support unit, wherein the abutment portion is supported by the cover member via an arm member, and biased to the outer peripheral surface of the roll sheet by an elastic member.

12 . The apparatus according to claim 1 , wherein
the abutment portion is located at a position higher than the rotation member, and an entrance of the conveyance path is located at a height between the abutment portion and the rotation member.

13 . A printing apparatus comprising
a feeding apparatus, and a printing unit configured to print an image on a sheet fed from the feeding apparatus, wherein the feeding apparatus comprises a roll support unit configured to rotatably support a roll sheet which is a sheet wound into a roll form, a first drive unit configured to rotate the roll sheet supported by the roll support unit in a predetermined rotation direction to feed the sheet into a conveyance path, an abutment portion provided so as to be capable of abutting against an outer peripheral surface of the roll sheet at a first position, and a rotation member provided so as to be capable of abutting against the outer peripheral surface at a second position different from the first position, the feeding apparatus causes the first drive unit to rotate the roll sheet in the predetermined rotation direction to introduce, into the conveyance path, a leading edge of the sheet having passed between the first position and the second position, and the feeding apparatus includes a second drive unit configured to rotate the rotation member in a direction in which a slack of the sheet is formed between the first position and the second position.

14 . A control method of a feeding apparatus that includes a first drive unit configured to rotate a roll sheet in a predetermined rotation direction to feed the sheet into a conveyance path, an abutment portion provided so as to be capable of abutting against an outer peripheral surface of the roll sheet at a first position, and a rotation member provided so as to be capable of abutting against the outer peripheral surface at a second position different from the first position, and causes the first drive unit to rotate the roll sheet in the predetermined rotation direction to introduce, into the conveyance path, a leading edge of the sheet having passed between the first position and the second position, the method comprising:
causing a second drive unit to rotate the rotation member in a direction in which a slack of the sheet is formed between the first position and the second position; and stopping the rotation of the rotation member by the second drive unit after the leading edge has passed the second position.

Assignees

• Canon Kk

Inventors

• Harigae Ryo
• Shimamura Kenji

Classifications

• B65H19/105 Primary

  Opening of web rolls; Removing damaged outer layers; Detecting the leading end of a closed web roll · CPC title

• B65H2404/1521

  rotating, pivoting or oscillating around an axis, e.g. parallel to the roller axis · CPC title

• B65H2301/41509

  opening web roll and related steps · CPC title

• B65H2404/691

  Guiding means extensible in material transport direction · CPC title

• B65H2301/41376

  arranged in a non-stationary manner, i.e. changing according to actual roll diameter · CPC title