Printing apparatus, method of controlling printing apparatus, and storage medium

Patent metadata

Field	Value
Publication number	US-11142001-B2
Application number	US-201916358737-A
Country	US
Kind code	B2
Filing date	Mar 20, 2019
Priority date	Mar 27, 2018
Publication date	Oct 12, 2021
Grant date	Oct 12, 2021

Abstract

A printing apparatus can prevent a print medium from buckling during discharging. In a case in which the print conveyance speed determined by the print mode is higher than or equal to a specified speed, the print medium after printing is conveyed to a discharging tray at the print conveyance speed, and in a case in which the print conveyance speed determined by the print mode is lower than the specified speed, the print medium after printing is conveyed to the discharging tray at the specified speed increased from the print conveyance speed.

First claim

What is claimed is:

1. A printing apparatus comprising:
a print head including a plurality of ejecting openings to eject ink arrayed in a predetermined direction so as to correspond to the width of a print medium, and configured to perform a printing operation for ejecting ink from the ejecting openings on a print medium based on print data;
a conveying unit configured to convey the print medium in a direction intersecting the predetermined direction, the print head performing the printing operation on the print medium being conveyed at a print conveyance speed;
a discharging tray onto which the print medium on which printing has been performed by the print head is discharged; and
a conveyance control unit configured to control the conveying unit such that in a case in which the print conveyance speed in the printing operation is slower than a specified speed, after the printing operation the conveying unit discharges the print medium, on which the printing operation has been performed with conveyance at the print conveyance speed, to the discharging tray at the specified speed faster than the print conveyance speed in the printing operation, and in a case in which the print conveyance speed in the printing operation is faster than or equal to the specified speed, after the printing operation the conveying unit discharges the printing medium to the discharging tray at the print conveyance speed.

2. The printing apparatus according to claim 1 , wherein
in a print mode in which the print medium is required to be retained within a conveying path during a retention time, the conveyance control unit makes the print medium wait at a waiting position for a specified time after printing, and
the specified time is time to compensate for a potential reduction of the retention time due to the speed increase from the print conveyance speed to the specified speed.

3. The printing apparatus according to claim 2 , wherein
the waiting position is upstream of a specified position in the conveying path at which the speed increase to the specified speed starts.

4. The printing apparatus according to claim 2 , wherein the conveyance control unit determines the print conveyance speed and a time which corresponds to the print conveyance speed and for which the print medium on which printing has been performed by the print head is made to wait inside the printing apparatus depending on a condition of printing.

5. The printing apparatus according to claim 1 , wherein
in a print mode in which the print medium is required to be retained within a conveying path during a retention time, the conveyance control unit conveys the print medium at a speed reduced from the print conveyance speed up to a specified position at which the speed increase to the specified speed starts, and
the speed reduced from the print conveyance speed is speed to compensate for a potential reduction of the retention time due to the speed increase from the print conveyance speed to the specified speed.

6. The printing apparatus according to claim 1 , wherein
in a case of the print medium after printing reaching a specified position, the conveyance control unit starts the speed increase from the print conveyance speed to the specified speed.

7. The printing apparatus according to claim 1 , wherein
the specified speed varies depending on a physical property of the print medium after printing or a configuration of the printing apparatus.

8. The printing apparatus according to claim 7 , wherein
the physical property varies depending on the kind of the print medium, a size of the print medium, surrounding environment, and the amount of ink applied.

9. The printing apparatus according to claim 7 , wherein
the physical property includes rigidity of the print medium and a friction coefficient of the print medium.

10. The printing apparatus according to claim 1 , wherein
the specified speed is a speed that does not cause buckling of the print medium after printing in the case of the print medium after printing being discharged at the speed onto the discharging tray or the print medium being stacked on the discharging tray.

11. The printing apparatus according to claim 10 , wherein
the specified speed is a speed that allows the discharged print medium to be stacked within a specified range in an orderly manner in the case of the print medium after printing being discharged onto the discharging tray or the print medium being stacked on the discharging tray.

12. The printing apparatus according to claim 1 , wherein
the conveyance control unit reduces the speed of the print medium just before a trailing end of the print medium is discharged.

13. The printing apparatus according to claim 1 , wherein
the print medium is discharged with a printed surface facing down.

14. The printing apparatus according to claim 1 , wherein
in a print mode in which the print medium is required to be retained within a conveying path during a retention time, the conveyance control unit conveys the print medium at a speed reduced from the print conveyance speed during the printing operation, and
the speed reduced from the print conveyance speed is speed to compensate for a potential reduction of the retention time due to the speed increase from the print conveyance speed to the specified speed.

15. A method of controlling a printing apparatus including:
a print head including a plurality of ejecting openings to eject ink arrayed in a predetermined direction so as to correspond to the width of a print medium, and configured to perform a printing operation for ejecting ink from the ejecting openings on the print medium based on print data,
a conveying unit configured to convey the print medium in a direction intersecting the predetermined direction, the print head performing the printing operation on the print medium being conveyed at a print conveyance speed, and
a discharging tray onto which the print medium on which printing has been performed by the print head is discharged, the method comprising:
a conveyance control step of controlling the conveying unit such that in a case in which the print conveyance speed in the printing operation is slower than a specified speed, after the printing operation the conveying unit discharges the print medium, on which the printing operation has been performed with conveyance at the print conveyance speed, to the discharging tray at the specified speed faster than the print conveyance speed in the printing operation, and in a case in which the print conveyance speed in the printing operation is faster than or equal to the specified speed after the printing operation the conveying unit discharges the printing medium to the discharging tray at the print conveyance speed.

16. A non-transitory computer readable storage medium storing a program for causing a computer to perform a method of controlling a printing apparatus including:
a print head including a plurality of ejecting openings to eject ink arrayed in a predetermined direction so as to correspond to the width of a print medium, and configured to perform a printing operation for ejecting ink from the ejecting openings on the print medium based on print data,
a conveying unit configured to convey the print medium in a direction intersecting the predetermined direction, the print head performing a printing operation on the print medium being conveyed at a print conveyance speed, and
a discharging tray onto which the print medium on which printing has been performed by the print head is discharged, the method comprising:
causing a computer included in the printin

Assignees

• Canon Kk

Inventors

• Sakurai Norio
• Yamamoto Kosuke
• Emoto Yuki
• Somano Toshiaki

Classifications

• B65H2553/61

  Mechanical means, e.g. contact arms · CPC title

• B65H2513/52

  Age; Duration; Life time or chronology of event · CPC title

• B65H2511/15

  Height, e.g. of stack · CPC title

• B41J11/002

  Curing or drying the ink on the copy materials, e.g. by heating or irradiating · CPC title

• B65H29/52

  Stationary guides or smoothers · CPC title