Recording apparatus, and method for controlling recording apparatus

Patent metadata

Field	Value
Publication number	US-12496840-B2
Application number	US-202318396978-A
Country	US
Kind code	B2
Filing date	Dec 27, 2023
Priority date	Dec 28, 2022
Publication date	Dec 16, 2025
Grant date	Dec 16, 2025

Abstract

With a recording apparatus for performing recording onto a continuous sheet to be conveyed, for starting conveyance of the continuous sheet, control is started so that with a first conveyance roller for conveying the continuous sheet on the upstream side of a recording portion in a conveyance path of a continuous sheet being stopped, the speed of a second conveyance roller for conveying the continuous sheet on the downstream side of the recording portion in the conveyance path becomes a first speed, and control is changed so that the speed of the second conveyance roller becomes a second speed faster than the first speed, and moreover control of the first conveyance roller is started so that the speed of the first conveyance roller may become a third speed faster than the first speed and slower than the second speed.

First claim

What is claimed is:

1 . A recording apparatus comprising:
a recording portion for performing recording onto a continuous sheet to be conveyed; a first conveyance roller for conveying a continuous sheet on an upstream side of the recording portion in a conveyance path of a continuous sheet; a second conveyance roller for conveying a continuous sheet on a downstream side of the recording portion in the conveyance path; and a control unit for controlling the first conveyance roller and the second conveyance roller, wherein the control unit:
starts control such that a speed of the second conveyance roller becomes a first speed, with the first conveyance roller being stopped, and
changes control such that the speed of the second conveyance roller becomes a second speed faster than the first speed, and starts control of the first conveyance roller such that a speed of the first conveyance roller becomes a third speed faster than the first speed and slower than the second speed.

2 . The recording apparatus according to claim 1 , further comprising:
a tension detecting unit for detecting a tension of a continuous sheet between the first conveyance roller and the second conveyance roller in the conveyance path, wherein the control unit comprises:
a power source for generating power for driving the second conveyance roller; and
a torque adjusting unit capable of adjusting a torque to be transmitted from the power source to the second conveyance roller; and
wherein the control unit starts control of the first conveyance roller after:
the power source is caused to generate the power, with the first conveyance roller being stopped, and
a tension detected by the tension detecting unit is converged within a prescribed range by adjustment of the torque by the torque adjusting unit.

3 . The recording apparatus according to claim 2 ,
wherein the torque adjusting unit is an electromagnetic clutch provided between the power source and the second conveyance roller.

4 . The recording apparatus according to claim 2 ,
wherein the control unit performs control such that the speed of the first conveyance roller becomes slower than the speed of the second conveyance roller during conveyance of a continuous sheet.

5 . The recording apparatus according to claim 2 ,
wherein for starting conveyance of a continuous sheet, after a tension detected by the tension detecting unit falls within a prescribed tension range or lower, the torque adjusting unit starts transmission of a torque from the power source to the second conveyance roller.

6 . The recording apparatus according to claim 2 ,
wherein the tension detecting unit has a tension detecting roller for extending, in a tensioned state, a continuous sheet, and a tension detection member provided at each of a pair of bearings for pivotally supporting both ends of the tension detecting roller.

7 . The recording apparatus according to claim 6 ,
wherein in a case where a difference in tension between both ends of the tension detecting roller detected by the tension detecting unit exceeds a prescribed value, the torque adjusting unit adjusts the torque.

8 . The recording apparatus according to claim 2 , further comprising:
a meandering correcting unit for correcting meandering of a continuous sheet between the first conveyance roller and the recording portion in the conveyance path.

9 . The recording apparatus according to claim 8 ,
wherein the meandering correcting unit has a meandering correcting roller for extending, in a tensioned state, a continuous sheet, and being capable of changing parallelism with respect to the first conveyance roller and a continuous sheet.

10 . The recording apparatus according to claim 2 , further comprising:
a meandering correcting unit for a continuous sheet on an upstream side of the first conveyance roller in the conveyance path.

11 . The recording apparatus according to claim 10 ,
wherein the meandering correcting unit has a guide member for regulating an end portion of a continuous sheet in a width direction of a continuous sheet orthogonal to a conveyance direction of a continuous sheet in the width direction.

12 . A method for controlling a recording apparatus,
the recording apparatus including: a recording portion for performing recording onto a continuous sheet to be conveyed, a first conveyance roller for conveying a continuous sheet on an upstream side of the recording portion in a conveyance path of a continuous sheet, a second conveyance roller for conveying a continuous sheet on a downstream side of the recording portion in the conveyance path, and a control unit for controlling the first conveyance roller and the second conveyance roller, the method for controlling the recording apparatus comprising:
starting control such that a speed of the second conveyance roller becomes a first speed, with the first conveyance roller being stopped; and
changing control such that the speed of the second conveyance roller becomes a second speed faster than the first speed, and starting control of the first conveyance roller such that a speed of the first conveyance roller becomes a third speed faster than the first speed and slower than the second speed.

13 . The method for controlling a recording apparatus according to claim 12 ,
wherein the recording apparatus further comprises a tension detecting unit for detecting a tension of a continuous sheet between the first conveyance roller and the second conveyance roller in the conveyance path, wherein the control unit comprises:
a power source for generating power for driving the second conveyance roller; and
a torque adjusting unit capable of adjusting a torque to be transmitted from the power source to the second conveyance roller; and
wherein the control unit starts control of the first conveyance roller after: the power source is caused to generate the power, with the first conveyance roller being stopped, and the torque is adjusted by the torque adjusting unit such that a tension detected by the tension detecting unit is converged within a prescribed range.

14 . The method for controlling a recording apparatus according to claim 13 ,
wherein the torque adjusting unit is an electromagnetic clutch provided between the power source and the second conveyance roller.

15 . The method for controlling a recording apparatus according to claim 13 ,
wherein the control unit performs control such that the speed of the first conveyance roller may become slower than the speed of the second conveyance roller during conveyance of a continuous sheet.

16 . The method for controlling a recording apparatus according to claim 13 ,
wherein for starting conveyance of a continuous sheet, after a tension detected by the tension detecting unit falls within a prescribed tension range or lower, the torque adjusting unit starts transmission of a torque from the power source to the second conveyance roller.

Assignees

• Canon Kk

Inventors

• Sato Ryosuke
• Nieda Kengo
• Sunouchi Shunya
• Sugimoto Masahiro
• Nakaya Yusuke
• Yanagi Yuichiro

Classifications

• B41J15/04

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

• B41J15/165

  for tensioning continuous copy material by use of redirecting rollers or redirecting nonrevolving guides · CPC title

• B41J15/048 Primary

  Conveyor belts or like feeding devices (B41J11/007 takes precedence) · CPC title

• B41J15/046

  for the guidance of continuous copy material, e.g. for preventing skewed conveyance of the continuous copy material · CPC title

• B41J15/16 Primary

  Means for tensioning or winding the web · CPC title