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

Patent metadata

Field	Value
Publication number	US-9427985-B2
Application number	US-201514723617-A
Country	US
Kind code	B2
Filing date	May 28, 2015
Priority date	Jun 4, 2014
Publication date	Aug 30, 2016
Grant date	Aug 30, 2016

Abstract

A printing apparatus includes a feeding unit configured to feed a printing sheet stacked on a stacking unit, a conveying unit configured to convey the printing sheet fed by the feeding unit, a printing unit configured to print the printing sheet conveyed by the conveying unit, and a control unit configured to control the feeding unit and the conveying unit. When continuously printing on the first surfaces of a plurality of printing sheets, the feeding unit forms an overlap state in which a trailing edge of a preceding sheet and a leading edge of a succeeding sheet overlap each other, and the conveying unit conveys the printing sheets while keeping the overlap state. When performing double-sided printing on the first surface and the second surface of the printing sheet, the feeding unit does not form the overlap state.

First claim

What is claimed is:

1. A printing apparatus comprising:
a feeding roller configured to feed a printing sheet;
a conveyance roller configured to convey the printing sheet fed by the feeding roller;
a printing unit configured to perform printing on a first surface and a second surface of the printing sheet conveyed by the conveyance roller;
a reverse conveyance guide configured to reverse the printing sheet having been printed on the first surface by the printing unit and convey the printing sheet to the conveyance roller;
a conveyance control unit configured to control conveyance of printing sheets so that an overlap state, in which a trailing edge of a preceding sheet as a printing sheet precedingly fed by the feeding roller and a leading edge of a succeeding sheet as a printing sheet succeedingly fed by the feeding roller overlap each other, is formed between the feeding roller and the conveyance roller, wherein when continuously performing printing on the first surface of the succeeding sheet after printing on the first surface of the preceding sheet, the conveyance control unit forms the overlap state, and when continuously performing printing on the first surface of the succeeding sheet after printing on the second surface of the preceding sheet, the conveyance control unit does not form the overlap state; and
a determination unit configured to determine, in a case where the overlap state is formed, whether to convey the succeeding sheet to a position facing the printing unit while keeping the overlap state or to convey the succeeding sheet to the position after the overlap state has been cancelled.

2. The apparatus according to claim 1 , wherein the reverse conveyance guide is configured to reverse the printing sheet from the first surface to the second surface,
wherein when executing double-sided printing on a first surface and a second surface of the printing sheet, after a printing operation of the first surface of the printing sheet ends, the conveyance control unit conveys the printing sheet to the reverse conveyance guide in a reverse direction opposite to a conveyance direction at the time of the printing operation,
the reverse conveyance guide reverses the printing sheet from the first surface to the second surface, and sets the second surface of the printing sheet as a printing surface, and
the conveyance control unit conveys the printing sheet reversed by the reverse conveyance guide to the conveyance roller.

3. The apparatus according to claim 2 , further comprising a sheet pressing unit configured to press the trailing edge of the preceding sheet downward when performing an operation of making the leading edge of the succeeding sheet overlap the trailing edge of the preceding sheet,
wherein the sheet pressing unit is configured to be rotatable while the sheet pressing unit is in contact with the printing sheet when the printing sheet is conveyed in the reverse direction.

4. The apparatus according to claim 2 , further comprising a sheet pressing unit configured to press the trailing edge of the preceding sheet downward when performing an operation of making the leading edge of the succeeding sheet overlap the trailing edge of the preceding sheet,
wherein the sheet pressing unit is arranged at a position which does not contact the printing sheet when the printing sheet is conveyed in the reverse direction.

5. The apparatus according to claim 2 , further comprising a sheet pressing unit configured to press the trailing edge of the preceding sheet downward when performing an operation of making the leading edge of the succeeding sheet overlap the trailing edge of the preceding sheet,
wherein when the printing sheet is conveyed in the reverse direction, the leading edge of the printing sheet whose first surface is set as a printing surface passes through the sheet pressing unit and then the leading edge of the printing sheet whose second surface is set as a printing surface by the reverse conveyance guide passes through the sheet pressing unit.

6. A control method for a printing apparatus including a feeding roller configured to feed a printing sheet, a conveyance roller configured to convey the printing sheet fed by the feeding roller, a printing unit configured to perform printing on a first surface and a second surface of the printing sheet conveyed by the conveyance roller, and a reverse conveyance guide configured to reverse the printing sheet having been printed on the first surface by the printing unit and convey the printing sheet to the conveyance roller, the method comprising:
a conveyance control step of controlling conveyance of printing sheets so that an overlap state, in which a trailing edge of a preceding sheet as a printing sheet precedingly fed by the feeding roller and a leading edge of a succeeding sheet as a printing sheet succeedingly fed by the feeding roller overlap each other, is formed between the feeding roller and the conveyance roller, wherein when continuously performing printing on the first surface of the succeeding sheet after printing on the first surface of the preceding sheet, the conveyance control step forms the overlap state, and when continuously performing printing on the first surface of the succeeding sheet after printing on the second surface of the preceding sheet, the conveyance control step does not form the overlap state; and
a determination step of determining, in a case where the overlap state is formed, whether to convey the succeeding sheet to a position facing the printing unit while keeping the overlap state or to convey the succeeding sheet to the position after the overlap state has been cancelled.

7. A non-transitory computer-readable storage medium storing a program for causing a computer to execute a step of a control method for a printing apparatus including a feeding roller configured to feed a printing sheet, a conveyance roller configured to convey the printing sheet fed by the feeding roller, a printing unit configured to perform printing on a first surface and a second surface of the printing sheet conveyed by the conveying roller, and a reverse conveyance guide configured to reverse the printing sheet having been printed on the first surface by the printing unit and convey the printing sheet to the conveyance roller, the method comprising:
a conveyance control step of controlling conveyance of printing sheets so that an overlap state, in which a trailing edge of a preceding sheet as a printing sheet precedingly fed by the feeding roller and a leading edge of a succeeding sheet as a printing sheet succeedingly fed by the feeding roller overlap each other, is formed between the feeding roller and the conveyance roller, wherein when continuously performing printing on the first surface of the succeeding sheet after printing on the first surface of the preceding sheet, the conveyance control step forms the overlap state, and when continuously performing printing on the first surface of the succeeding sheet after printing on the second surface of the preceding sheet, the conveyance control step does not form the overlap state; and
a determination step of determining, in a case where the overlap state is formed, whether to convey the succeeding sheet to a position facing the printing unit while keeping the overlap state or to convey the succeeding sheet to the position after the overlap state has been cancelled.

Assignees

• Canon Kk

Inventors

• Taniguchi Hisashi
• Saito Tetsuya
• Kunihiro Syunichi

Classifications

• B41J13/0018

  in the sheet input section of automatic paper handling systems · CPC title

• B41J13/0009 Primary

  control of the transport of the copy material · CPC title

• B41J3/60 Primary

  for printing on both faces of the printing material · CPC title