Printing apparatus, method of controlling the same, and storage medium

Patent metadata

Field	Value
Publication number	US-12025937-B2
Application number	US-202117324245-A
Country	US
Kind code	B2
Filing date	May 19, 2021
Priority date	May 22, 2020
Publication date	Jul 2, 2024
Grant date	Jul 2, 2024

Abstract

A printing apparatus selectively executes a first print control in which an image is printed on a sheet for which a single-sided printing is instructed after an image has been printed on a first surface of a last sheet of sheets for which a double-sided printing is instructed and which correspond to pages before a page corresponding to the sheet for which the single-sided printing is instructed, and a second print control in which printing on a first surface of a number of sheets, within a predetermined number of pages after a page corresponding to a sheet for which the single-sided printing is instructed, for which the double-sided printing is instructed and which correspond to pages after the page corresponding to the sheet on which the single-sided printing is instructed, is performed prior to printing of the sheet on which the single-sided printing is instructed.

First claim

What is claimed is:

1. A printing apparatus capable of receiving and executing a mixed print job in which single-sided printing and double-sided printing are mixed, the printing apparatus comprising:
a feeding unit that accumulates a plurality of sheets and feeds a sheet of the plurality of sheets;
a printer unit that prints an image on a sheet;
a double-sided conveyance path that includes a refeeding unit configured to refeed a sheet in which an image has been printed on a first side of the sheet and to feed the sheet in order to print an image on a second side of the sheet;
a memory device that stores instructions; and
one or more processors that execute the instructions stored in the memory device to cause the printing apparatus to execute double-sided print processing in a case where a print job in which a page corresponding to a sheet for which double-sided printing is instructed is included but a page corresponding to a sheet for which single-sided printing is instructed is not included,
wherein the double-sided print processing including:
(1) first processing that feeds a predetermined number of sheets from the feeding unit and feeds the predetermined number of sheets on each of which an image has been printed on a first side of the sheet to the double-sided conveyance path,
(2) second processing that alternately executes refeed processing for refeeding a sheet from the refeeding unit after the first processing and feed processing for feeding a sheet from the feeding unit, and
(3) third processing that feeds a plurality of sheets from the refeeding unit after all sheets that are to be fed in the print job have been fed from the feeding unit,
wherein the one or more processors decide to execute a first mixed print mode or a second mixed print mode based on a number of M in a case where a mixed print job including pages corresponding to L sheets for which the double-sided printing is instructed, pages corresponding to M sheets for which the single-sided printing is instructed after the pages corresponding to L sheets, and pages corresponding to N sheets for which the double-sided printing is instructed after the pages corresponding to M sheets is executed, with L, M and N being equal to or more than 1,
wherein, in the first mixed print mode, the one or more processors execute the double-sided print processing on the L sheets, the M sheets and the N sheets by treating the M sheets as sheets for which the double-sided printing is instructed but do not print on a second side of the M sheets fed from the refeeding unit,
wherein, in the second mixed print mode, the one or more processors execute the double-sided printing on the L sheets for which the double-sided printing is instructed, feed at least a first sheet of the N sheets for which the double-sided printing is instructed from the feeding unit, after a last sheet of the L sheets has been fed from the refeeding unit and before a last sheet of the M sheets for which the single-sided printing is instructed is fed from the feeding unit print an image on a first side of the first sheet of the N sheets, and feed the first sheet of the N sheets from the refeeding unit after the last sheet of the M sheets is fed from the feeding unit, and each of the M sheets being not conveyed on the double-sided conveyance path, and
wherein the one or more processors select the second mixed print mode in a case the number of M is larger than a second predetermined number.

2. The printing apparatus according to claim 1 , wherein the one or more processors select the first mixed print mode in a case that the number of M is less than a second predetermined number.

3. The printing apparatus according to claim 1 , wherein the predetermined number is decided based on a number of waiting positions at which a sheet is able to wait in the double-sided conveyance path according to the size of a sheet while the printer unit is printing.

4. The printing apparatus according to claim 1 , wherein the predetermined number corresponds to a number of succeeding sheets of a first sheet fed by the feeding unit after the first sheet for which the double-sided printing is instructed is fed by the feeding unit until the first sheet for which the double-sided printing is instructed is fed by the refeeding unit.

5. The printing apparatus according to claim 2 , wherein the second predetermined number is decided based on a number of waiting positions at which a sheet is able to wait in the double-sided conveyance path according to a size of the sheet when the printer unit is printing.

6. The printing apparatus according to claim 2 , wherein the predetermined number corresponds to a number of succeeding sheets of a first sheet fed by the feeding unit after the first sheet for which the double-sided printing is instructed has been fed by the feeding unit until the first sheet for which the double-sided printing is instructed is fed by the refeeding unit.

7. A method of controlling a printing apparatus that includes a feeding unit that accumulates a plurality of sheets and feeds a sheet of the plurality of sheets, a printer unit that prints an image on a sheet, and a double-sided conveyance path that includes a refeeding unit configured to refeed a sheet in which an image has been printed printing on a first side of the sheet and to feed the sheet in order to print an image on a second side of the sheet, and can receive and execute a mixed print job in which single-sided printing and double-sided printing are mixed, the method comprising:
executing double-sided print processing in a case where a print job in which a page corresponding to a sheet for which double-sided printing is instructed is included but a page corresponding to a sheet for which single-sided printing is instructed is not included,
wherein the double-sided print processing including:
(1) first processing that feeds a predetermined number of sheets from the feeding unit and feeds the predetermined number of sheets on each of which an image has been printed on a first side of the sheet to the double-sided conveyance path,
(2) second processing that alternately executes refeed processing for refeeding a sheet from the refeeding unit after the first processing and feed processing for feeding a sheet from the feeding unit, and
(3) third processing that feeds a plurality of sheets from the refeeding unit after all sheets that are to be fed in the print job have been fed from the feeding unit;
deciding to execute a first mixed print mode or a second mixed print mode based on a number of M in a case where a mixed print job including pages corresponding to L sheets for which the double-sided printing is instructed, pages corresponding to M sheets for which the single-sided printing is instructed after the pages corresponding to L sheets, and pages corresponding to N sheets for which the double-sided printing is instructed after the pages corresponding to M sheets is executed, with L, M and N being integers equal to or more than 1;
in the first mixed print mode, executing the double-sided print processing on the L sheets, the M sheets and the N sheets by treating the M sheets as sheets for which the double-sided printing is instructed but do not print on a second side of the M sheets fed from the refeeding unit;
in the second mixed print mode, executing the double-sided printing on the L sheets for which the double-sided printing is instructed, feed at least a first sheet of the N sheets for which the double-sided printing is instructed from the feeding unit, after a last sheet of the L sheets has been fed from the refeeding unit and before a last sheet of the M sheets for which the single-sided printing is instructed is fed from the feeding unit and print an image on a first side of the first sheet of the N

Assignees

• Canon Kk

Inventors

• Miyajima Jun

Classifications

• G03G15/5012

  Priority interrupt; Job recovery, e.g. after jamming or malfunction · CPC title

• G03G15/5054 Primary

  by measuring the characteristics of an intermediate image carrying member or the characteristics of an image on an intermediate image carrying member, e.g. intermediate transfer belt or drum, conveyor belt · CPC title

• G03G2215/00586

  duplex mode · CPC title

• G03G15/234 Primary

  by inverting and refeeding the image receiving material with an image on one face to the recording member to transfer a second image on its second face, e.g. by using a duplex tray; Details of duplex trays or inverters · CPC title