# US 11,906,921 B2 · Image forming apparatus capable of forming toner image with desired amount of toner, control method for the image forming apparatus, 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 11,906,921 B2 - Document ID: US11906921B2 - Status: Granted - Kind: B2 - Application number: 17/692,307 - Filed: 2022-03-11 - Published: 2022-09-22 - Granted: 2024-02-20 - Earliest claimed: 2021-03-16 - Assignees: Canon Kabushiki Kaisha - Applicants: Canon Kabushiki Kaisha - Inventors: Hiroshi Oya - Web page: https://patentgrep.com/patent/US11906921B2 ## CPC - G03G 15/556: {for toner consumption, e.g. pixel counting, toner coverage detection or toner density measurement} - G03G 15/6585: {by using non-standard toners, e.g. transparent toner, gloss adding devices} - G03G 15/5008: {Driving control for rotary photosensitive medium, e.g. speed control, stop position control} - G03G 21/02: Counting the number of copies; Billing - G03G 15/5016: {User-machine interface; Display panels; Control console} - G03G 2215/00949: Copy material feeding speed switched according to current mode of the apparatus, e.g. colour mode - G03G: ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY ## Abstract An image forming apparatus that is capable of properly grasping a load that is imposed on the image forming apparatus by performing high-chroma printing. The image forming apparatus includes a printer engine that causes a heating rotary body to support and convey a sheet with a toner image formed thereon and performs an image formation on the sheet. The printer engine is controlled to perform the image formation on sheets in a first mode in which a toner image based on a piece of image data is formed with a first amount of toner, or a second mode in which a toner image based on the piece of image data is formed with a second amount of toner larger than the first amount of toner. A count function for counting the number of times of the image formation performed in the second mode, rather than the first mode, is performed. ## Claims ### Claim 1 An image forming apparatus comprising: a printer engine that causes a heating rotary body to support and convey a sheet with a toner image formed thereon and performs an image formation on the sheet; a first counter used for counting up when one page is printed with one of first chroma and second chroma higher than the first chroma; a second counter used for counting up when one page is printed with the second chroma; at least one memory; and at least one processor that executes instructions stored in the at least one memory to: control the printer engine to perform, during a printing process, the image formation on sheets in a first mode in which a toner image based on a piece of image data is formed with a first amount of toner, or a second mode in which a toner image based on the piece of image data is formed with a second amount of toner larger than the first amount of toner; control the first counter to count up during a period corresponding to the printing process; control the second counter not to count up during the period corresponding to the printing process, in a case where the printer engine is controlled in the first mode; and control the second counter to count up during the period corresponding to the printing process, in a case where the printer engine is controlled in the second mode. ### Claim 2 (depends on 1) The image forming apparatus according to claim 1, wherein the printer engine includes a transfer body that transfers a toner image based on a piece of image data onto a sheet. ### Claim 3 (depends on 1) The image forming apparatus according to claim 1, wherein a cartridge that stores a predetermined amount of toner used for the image formation is detachable from the image forming apparatus. ### Claim 4 (depends on 3) The image forming apparatus according to claim 3, wherein the cartridge includes the first counter and the second counter. ### Claim 5 (depends on 1) The image forming apparatus according to claim 1, wherein the period corresponding to the printing process starts at a start of printing one page of a print data, and wherein the at least one processor further executes the instructions stored in the at least one memory to: count up the first counter when feeding a sheet for executing the printing process; and count up the second counter when executing the printing process, in a case where toner application amount included in the print data is greater than a threshold. ### Claim 6 (depends on 1) The image forming apparatus according to claim 1, wherein the period corresponding to the printing process starts at a completion of printing one page of a print data, and wherein the at least one processor further executes the instructions stored in the at least one memory to: count up the first counter at the completion; and count up the second counter at the completion in a case where toner application amount included in the print data is greater than a threshold. ### Claim 7 (depends on 1) The image forming apparatus according to claim 1, further comprising a third counter, wherein the at least one processor further executes the instructions stored in the at least one memory to: control the third counter not to count up during the period corresponding to the printing process, in a case where there is no setting for rotational speed reduction control for the heating rotary body; and control the third counter to count up during the period corresponding to the printing process, in a case where there is a setting for rotational speed reduction control for the heating rotary body. ### Claim 8 (depends on 1) The image forming apparatus according to claim 1, wherein the at least one processor further executes the instructions stored in the at least one memory to: set each page in the print data whether or not to perform high-chroma printing; and control the printer engine in the second mode when a page in the print data is set to perform the high-chroma printing. ### Claim 9 (depends on 1) The image forming apparatus according to claim 1, wherein the heating rotary body is a cartridge having the first counter and the second counter. ### Claim 10 (depends on 1) The image forming apparatus according to claim 1, further comprising an interface to communicate with a server, wherein the at least one processor further executes the instructions stored in the at least one memory to send an alarm to the server when at least one of the first counter or the second counter becomes greater than a predetermined value. ### Claim 11 A control method for an image forming apparatus including a printer engine that causes a heating rotary body to support and convey a sheet with a toner image formed thereon and performs an image formation on the sheet, a first counter used for counting up when one page is printed with one of first chroma and second chroma higher than the first chroma, and a second counter used for counting up when one page is printed with the second chroma, the control method comprising: controlling the printer engine to perform, during a printing process, the image formation on sheets in a first mode in which a toner image based on a piece of image data is formed with a first amount of toner, or a second mode in which a toner image based on the piece of image data is formed with a second amount of toner larger than the first amount of toner; controlling the first counter to count up during a period corresponding to the printing process; controlling the second counter not to count up during the period corresponding to the printing process, in a case where the printer engine is controlled in the first mode; and controlling the second counter to count up during the period corresponding to the printing process, in a case where the printer engine is controlled in the second mode. ### Claim 12 (depends on 11) The control method according to claim 11, wherein the printer engine includes a transfer body that transfers a toner image based on a piece of image data onto a sheet. ### Claim 13 (depends on 11) The control method according to claim 11, wherein a cartridge that stores a predetermined amount of toner used for the image formation is detachable from the image forming apparatus. ### Claim 14 (depends on 13) The control method according to claim 13, wherein the cartridge includes the first counter and the second counter. ### Claim 15 (depends on 11) The control method according to claim 11, wherein the period corresponding to the printing process starts at a start of printing one page of a print data, and wherein the control method further includes: counting up the first counter when feeding a sheet for executing the printing process; and counting up the second counter when executing the printing process, in a case where toner application amount included in the print data is greater than a threshold. ### Claim 16 (depends on 11) The control method according to claim 11, wherein the period corresponding to the printing process starts at a completion of printing one page of a print data, and wherein the control method further includes: counting up the first counter at the completion; and counting up the second counter at the completion in a case where toner application amount included in the print data is greater than a threshold. ### Claim 17 (depends on 11) The control method according to claim 11, wherein the image forming apparatus further comprises a third counter, and wherein the control method further includes: controlling the third counter not to count up during the period corresponding to the printing process, in a case where there is no setting for rotational speed reduction control for the heating rotary body; and controlling the third counter to count up during the period corresponding to the printing process, in a case where there is a setting for rotational speed reduction control for the heating rotary body. ### Claim 18 (depends on 11) The control method according to claim 11, wherein the control method further includes: setting each page in the print data whether or not to perform high-chroma printing; and controlling the printer engine in the second mode when a page in the print data is set to perform the high-chroma printing. ### Claim 19 (depends on 11) The control method according to claim 11, wherein the heating rotary body is a cartridge having the first counter and the second counter. ### Claim 20 (depends on 11) The control method according to claim 11, further comprising an interface to communicate with a server, wherein the control method further includes sending an alarm to the server when at least one of the first counter or the second counter becomes greater than a predetermined value. ### Claim 21 A non-transitory computer-readable storage medium storing a program for causing a computer to execute a control method for an image forming apparatus including a printer engine that causes a heating rotary body to support and convey a sheet with a toner image formed thereon and performs an image formation on the sheet, a first counter used for counting up when one page is printed with one of first chroma and second chroma higher than the first chroma, and a second counter used for counting up when one page is printed with the second chroma, wherein the control method comprises: controlling the printer engine to perform, during a printing process, the image formation on sheets in a first mode in which a toner image based on a piece of image data is formed with a first amount of toner, or a second mode in which a toner image based on the piece of image data is formed with a second amount of toner larger than the first amount of toner; controlling the first counter to count up during a period corresponding to the printing process; controlling the second counter not to count up during the period corresponding to the printing process, in a case where the printer engine is controlled in the first mode; and controlling the second counter to count up during the period corresponding to the printing process, in a case where the printer engine is controlled in the second mode.