# US 2014/0153046 A1 · Printing apparatus, control method thereof and storage medium > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2014/0153046 A1 - Document ID: US20140153046A1 - Status: Published application - Kind: A1 - Application number: 14/083,041 - Filed: 2013-11-18 - Published: 2014-06-05 - Earliest claimed: 2012-12-03 - Assignees: Canon Kabushiki Kaisha - Applicants: Canon Kabushiki Kaisha - Inventors: Yoshinori Kuwano - Web page: https://patentgrep.com/patent/US20140153046A1 ## CPC - B41J 13/103: {for the sheet feeding section} - B41J 3/46: Printing mechanisms combined with apparatus providing a visual indication - B41J 11/003: {Paper-size detection, i.e. automatic detection of the length and/or width of copy material} - B41J: TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS ## Abstract In a printing apparatus which detects a size of a conveying sheet, even when sheets are replaced during execution of print processing, an incorrect size is suppressed from being stored as a size of sheets stored in a sheet storage unit. In order to achieve this, a printing apparatus of an aspect of this invention controls not to store a sheet size as a size of sheets stored in the sheet storage unit in a case where the sheet storage unit is opened during conveyance of a sheet, and controls to store a sheet size as the size of sheets stored in the sheet storage unit in a case where the sheet storage unit is not opened during conveyance of a sheet. ## Claims ### Claim 1 A printing apparatus comprising: a memory unit configured to store a size of a sheet stored in a sheet storage unit; an identifying unit configured to identify a size of a sheet conveyed from the sheet storage unit; and a control unit configured to control not to store the size of the sheet identified by the identifying unit as the size of the sheet stored in the sheet storage unit in a case where the sheet storage unit is opened during conveyance of the sheet, and to control to store the size of the sheet identified by the identifying unit as the size of the sheet stored in the sheet storage unit in a case where the sheet storage unit is not opened during conveyance of the sheet. ### Claim 2 (depends on 1) The apparatus according to claim 1, further comprising a determination unit configured to determine whether or not a sheet is stored in the sheet storage unit, wherein even in the case where the sheet storage unit is not opened during conveyance of the sheet, when the determination unit determines that no sheet is stored in the sheet storage unit, the control unit controls not to store the size of the sheet identified by the identifying unit as the size of the sheet stored in the sheet storage unit. ### Claim 3 (depends on 1) The apparatus according to claim 1, wherein in a case where the control unit controls not to store the size of the sheet identified by the identifying unit, the control unit controls to store a size of a sheet identified by the identifying unit when next print processing is executed. ### Claim 4 (depends on 1) The apparatus according to claim 1, wherein the control unit controls to store the size of the sheet identified by the identifying unit as the size of the sheet stored in the sheet storage unit after completion of conveyance of the sheet. ### Claim 5 (depends on 1) The apparatus according to claim 1, wherein in a case where a plurality of sheets are conveyed from the sheet storage unit upon execution of print processing, opening and closing of the sheet storage unit is inhibited during conveyance of a sheet other than a last sheet of the plurality of sheets, and opening and closing of the sheet storage unit is permitted during conveyance of the last sheet of the plurality of sheets. ### Claim 6 (depends on 1) The apparatus according to claim 1, further comprising a sensor configured to be used to detect a size of a sheet conveyed from the sheet storage unit, wherein the identifying unit identifies a size of a sheet conveyed from the sheet storage unit based on an output from the sensor. ### Claim 7 (depends on 1) The apparatus according to claim 1, further comprising a display control unit configured to display, on a display unit, a message which prompts a user to replace a sheet stored in the sheet storage unit before print processing is started, in a case where a size stored in the memory unit is different from a size of a sheet required for the print processing. ### Claim 8 (depends on 1) The apparatus according to claim 1, further comprising a print unit configured to print an image on the sheet based on the size stored in the memory unit. ### Claim 9 A control method of a printing apparatus comprising steps of: storing, in a memory unit, a size of a sheet stored in a sheet storage unit; identifying a size of a sheet conveyed from the sheet storage unit; and controlling not to store the size of the sheet identified in the identifying step as the size of the sheet stored in the sheet storage unit in a case where the sheet storage unit is opened during conveyance of the sheet, and controlling to store the size of the sheet identified in the identifying step as the size of the sheet stored in the sheet storage unit in a case where the sheet storage unit is not opened during conveyance of the sheet. ### Claim 10 A computer-readable storage medium storing a computer program for causing a computer to execute steps of a control method of a printing apparatus comprising steps of: storing, in a memory unit, a size of a sheet stored in a sheet storage unit; identifying a size of a sheet conveyed from the sheet storage unit; and controlling not to store the size of the sheet identified in the identifying step as the size of the sheet stored in the sheet storage unit in a case where the sheet storage unit is opened during conveyance of the sheet, and controlling to store the size of the sheet identified in the identifying step as the size of the sheet stored in the sheet storage unit in a case where the sheet storage unit is not opened during conveyance of the sheet.