Sheet supplying apparatus and printing apparatus

Patent metadata

Field	Value
Publication number	US-10427431-B2
Application number	US-201815903493-A
Country	US
Kind code	B2
Filing date	Feb 23, 2018
Priority date	Mar 10, 2017
Publication date	Oct 1, 2019
Grant date	Oct 1, 2019

Abstract

A sheet supplying apparatus, in which a user can select either automatic sheet feeding or manual sheet feeding, includes a driving unit configured to cause a roll including a wound consecutive sheet to rotate in a first direction for feeding the sheet or a second direction opposite to the first direction, a first sensor that detects a leading end portion of the sheet separated from an outer circumferential surface of the roll, a second sensor that detects the leading end portion which is manually set in a conveyance path by the user, and a determination unit configured to determine whether or not automatic sheet feeding is performed on the basis of a detection result of the second sensor.

First claim

What is claimed is:

1. A sheet supplying apparatus, comprising:
a driving unit configured to cause a roll including a wound consecutive sheet to rotate in a first direction for feeding the sheet or a second direction opposite to the first direction;
a first sensor that detects a leading end portion of the sheet separated from an outer circumferential surface of the roll; and
a second sensor that detects the leading end portion of the sheet, the second sensor being positioned downstream of the first sensor with respect to a direction in which the sheet is fed, wherein
in a case in which the second sensor detects the leading end portion of the sheet, the driving unit causes the roll to rotate in the first direction, and
in a case in which the second sensor does not detect the leading end portion of the sheet, the driving unit causes the roll to rotate in the second direction, and when the first sensor detects the leading end portion of the sheet, the driving unit changes a rotation direction of the roll from the second direction to the first direction.

2. The sheet supplying apparatus according to claim 1 , wherein the second sensor is installed at a position at which the leading end portion of the sheet separated from the outer circumferential surface does not pass through in a case where the roll is caused to rotate in the second direction.

3. The sheet supplying apparatus according to claim 1 , wherein, in a case in which the second sensor does not detect the leading end portion of the sheet within a predetermined time period after the user sets the roll in the sheet supplying apparatus, the driving unit starts the rotation of the roll in the second direction, and in a case in which the second sensor detects the leading end portion of the sheet within the predetermined time period after the user sets the roll in the sheet supplying apparatus, the driving unit starts the rotation of the roll in the first direction.

4. The sheet supplying apparatus according to claim 3 , further comprising a third sensor that detects a spool member of the roll,
wherein, in a case in which the third sensor detects the spool member, the roll is determined to be set.

5. The sheet supplying apparatus according to claim 1 , wherein, in a case in which the second sensor does not detect the leading end portion of the sheet, the driving unit starts the rotation of the roll in the first direction in accordance with the detection of the leading end portion by the second sensor.

6. The sheet supplying apparatus according to claim 1 , wherein, in a case in which the second sensor does not detect the leading end portion of the sheet, the driving unit starts the rotation of the roll in the first direction in accordance with an instruction of the user.

7. The sheet supplying apparatus according to claim 1 , wherein the first sensor is an optical sensor including a light emitting unit and a light receiving unit and is installed at a position at which the sheet separated from the outer circumferential surface passes through, and an output value of the first sensor increases as a distance from the sheet decreases.

8. A printing apparatus, comprising:
a sheet supplying apparatus including:
a driving unit configured to cause a roll including a wound consecutive sheet to rotate in a first direction for feeding the sheet or a second direction opposite to the first direction,
a first sensor that detects a leading end portion of the sheet separated from an outer circumferential surface of the roll, and
a second sensor that detects the leading end portion of the sheet, the second sensor being positioned downstream of the first sensor with respect to a direction in which the sheet is fed; and
a printing unit that prints an image on a sheet supplied from the sheet supplying apparatus, wherein

in a case in which the second sensor detects the leading end portion of the sheet, the driving unit causes the roll to rotate in the first direction, and
in a case in which the second sensor does not detect the leading end portion of the sheet, the driving unit causes the roll to rotate in the second direction, and when the first sensor detects the leading end portion of the sheet, the driving unit changes a rotation direction of the roll from the second direction to the first direction.

9. The printing apparatus according to claim 8 , wherein the second sensor is installed at a position at which the leading end portion of the sheet separated from the outer circumferential surface does not pass through in a case where the roll is caused to rotate in the second direction.

10. The printing apparatus according to claim 8 , wherein, in a case in which the second sensor does not detect the leading end portion of the sheet within a predetermined time period after the user sets the roll in the sheet supplying apparatus, the driving unit starts the rotation of the roll in the second direction, and in a case in which the second sensor detects the leading end portion of the sheet within the predetermined time period after the user sets the roll in the sheet supplying apparatus, the driving unit starts the rotation of the roll in the first direction.

11. The printing apparatus according to claim 10 , further comprising a third sensor that detects a spool member of the roll,
wherein, in a case in which the third sensor detects the spool member, the roll is determined to be set.

12. The printing apparatus according to claim 8 , wherein, in a case in which the second sensor does not detect the leading end portion of the sheet, the driving unit starts the rotation of the roll in the first direction in accordance with the detection of the leading end portion by the second sensor.

13. The printing apparatus according to claim 8 , wherein, in a case in which the second sensor does not detect the leading end portion of the sheet, the driving unit starts the rotation of the roll in the first direction in accordance with an instruction of the user.

14. The printing apparatus according to claim 8 , wherein the first sensor is an optical sensor including a light emitting unit and a light receiving unit and is installed at a position at which the sheet separated from the outer circumferential surface passes through, and an output value of the first sensor increases as a distance from the sheet decreases.

Assignees

• Canon Kk

Inventors

• Masuda Shuichi
• Kamada Masashi
• Eiyama Masato
• Igarashi Yuki
• Negishi Masashi
• Shinjo Ryoya
• Kobayashi Ryo
• Suzuki Tomohiro

Classifications

• B65H19/10

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

• B65H16/10

  Arrangements for effecting positive rotation of web roll · CPC title

• B65H2553/51

  Encoders, e.g. linear · CPC title

• B65H2301/41509

  opening web roll and related steps · CPC title

• B41J15/04 Primary

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