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

Patent metadata

Field	Value
Publication number	US-11254146-B2
Application number	US-202016831859-A
Country	US
Kind code	B2
Filing date	Mar 27, 2020
Priority date	Mar 29, 2019
Publication date	Feb 22, 2022
Grant date	Feb 22, 2022

Abstract

The present invention relates to a printing apparatus including: a conveyance roller; and a slitter unit configured to cut a printing medium, which is conveyed by the conveyance roller, wherein the slitter unit includes a cutting mechanism including an upper movable blade and a lower movable blade, each of which is in a round shape, and configured to cut the printing medium at a contact point of the upper movable blade and the lower movable blade, a driving unit configured to rotate the upper movable blade and the lower movable blade, and a control unit configured to control a driving amount of the driving unit, and wherein the control unit controls the driving amount of the driving unit such that a movement speed of the upper movable blade and the lower movable blade passing through the contact point becomes greater than a conveyance speed of the printing medium.

First claim

What is claimed is:

1. A printing apparatus comprising:
a conveyance roller configured to convey a printing medium;
a slitter unit comprising an upper blade and a lower blade which are both rotatable, the slitter unit being configured to cut the printing medium, conveyed by the conveyance roller, along a conveyance direction of the printing medium at a contact point between the upper blade and the lower blade;
a driving unit configured to rotate the upper blade; and
a control unit configured to control a movement speed at which the upper blade passes the contact point by controlling a driving amount of the driving unit,
wherein the control unit controls the driving amount of the driving unit such that the movement speed at a timing when a leading edge of the printing medium enters the contact point becomes greater than the movement speed at a timing after the leading edge of the printing medium has passed the contact point.

2. The printing apparatus according to claim 1 , wherein each of the upper blade and the lower blade has a round shape, and
wherein in a case where the slitter unit has cut the leading edge of the printing medium, which has entered the contact point, by a length that is approximately equal to a radius of the upper blade, the control unit controls the movement speed of the upper blade to become slower.

3. The printing apparatus according to claim 1 , wherein the slitter unit is provided on a downstream side relative to the conveyance roller in the conveyance direction.

4. The printing apparatus according to claim 1 , wherein the movement speed at a timing where the printing medium enters the contact point is approximately 101% of the conveyance speed.

5. The printing apparatus according to claim 1 , further comprising:
a printing unit configured to print an image on the printing medium conveyed by the conveyance roller in a conveyance direction; and
a carriage, upon which the printing unit is mounted, the carriage being configured to move the printing unit in a width direction of the printing medium,
wherein the slitter unit is arranged downstream in the conveyance direction from the printing unit.

6. A printing apparatus according to claim 5 , wherein the control unit alternately performs printing of an image by the printing unit and cutting of the printing medium by the slitter unit while conveying the printing medium by the conveyance roller.

7. The printing apparatus according to claim 1 , wherein at a timing where the leading edge of the printing medium enters the contact point, the movement speed is greater than a conveyance speed of the printing medium by the conveyance roller.

8. The printing apparatus according to claim 1 , wherein after the leading edge of the printing medium passes through the contact point, the driving unit reduces a rotation speed of the upper blade.

9. A control method of a printing apparatus, the printing apparatus including: (1) a conveyance roller configured to convey a printing medium; (2) a slitter unit comprising an upper blade and a lower blade which are both rotatable, the slitter unit being configured to cut the printing medium, conveyed by the conveyance roller, along a conveyance direction of the printing medium at a contact point between the upper blade and the lower blade; (3) a driving unit configured to rotate the upper blade; and (4) a control unit configured to control a movement speed at which the upper blade passes the contact point by controlling a driving amount of the driving unit,
wherein the control method comprises a step in which the control method controls the driving amount of the driving unit such that the movement speed at a timing when a leading edge of the printing medium enters the contact point becomes greater than the movement speed at a timing after the leading edge of the printing medium has passed the contact point.

Assignees

• Canon Kk

Inventors

• Nagase Tomoyuki
• Koda Takeshi

Classifications

• B41J11/42

  Controlling {printing material conveyance for accurate alignment of the printing material with the printhead; Print registering} · CPC title

• B41J11/663 Primary

  Controlling cutting, cutting resulting in special shapes of the cutting line, e.g. controlling cutting positions, e.g. for cutting in the immediate vicinity of a printed image · CPC title

• B41J13/0009

  control of the transport of the copy material · CPC title

• B41J11/68 Primary

  cutting parallel to the direction of paper feed · CPC title