# US 2021/0341867 A1 · Imaging system and defect detection program > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2021/0341867 A1 - Document ID: US20210341867A1 - Status: Published application - Kind: A1 - Application number: 17/270,676 - Filed: 2019-09-09 - Published: 2021-11-04 - Earliest claimed: 2018-09-10 - Assignees: Hewlett-Packard Development Company, L.P. - Applicants: Hewlett-Packard Development Company, L.P. - Inventors: Shinya NAKASHA - Web page: https://patentgrep.com/patent/US20210341867A1 ## CPC - G03G 15/5062: {by measuring the characteristics of an image on the copy material} - G03G 15/55: {Self-diagnostics; Malfunction or lifetime display} - G06K 15/027: {Test patterns and calibration (arrangements for controlling or analysing printing mechanisms of typewriters or selective printing units B41J29/393 takes precedence; colour correction using test pattern analysis in general H04N1/6033)} - G06K 15/408: {Handling exceptions, e.g. faults (computer driven error handling and recovery for a printer G06F3/1234)} - G03G 15/5058: {using a test patch} - G03G: ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY - G06K: GRAPHICAL DATA READING (image or video recognition or understanding G06V); PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS ## Abstract An imaging system includes a toner imaging device to form a toner image, a toner image conveying device to convey the toner image, a medium conveying device to convey a medium, and a toner image recording device to record the toner image conveyed by the toner image conveying device on the medium conveyed by the medium conveying device. Additionally, the imaging system includes a control device to determine a stop state including at least one of a state where a recording check toner image is recorded on the medium, a state where a conveyance check toner image is positioned on the toner image conveying device, and a state where a formation check toner image is positioned on the toner imaging device. During the stop state, the control device stops a formation of the toner image that is performed by the toner imaging device, stops a conveyance of the toner image that is performed by the toner image conveying device, and stops a conveyance of the medium that is performed by the medium conveying device. ## Claims ### Claim 1 An imaging system comprising: a toner imaging device to form a toner image; a toner image conveying device to convey the toner image; a medium conveying device to convey a medium; a toner image recording device to record the toner image conveyed by the toner image conveying device on the medium conveyed by the medium conveying device; and a control device to determine a stop state including at least one state selected from a group of states consisting of a state where a recording check toner image is recorded on the medium, a state where a conveyance check toner image is positioned on the toner image conveying device, and a state where a formation check toner image is positioned on the toner imaging device, wherein during the stop state, the control device to: stop a formation of the toner image that is performed by the toner imaging device, stop a conveyance of the toner image that is performed by the toner image conveying device, and stop a conveyance of the medium that is performed by the medium conveying device. ### Claim 2 (depends on 1) The imaging system according to claim 1, wherein the stop state determined by the control device includes at least two different states selected from the group of states. ### Claim 3 (depends on 1) The imaging system according to claim 1, wherein the stop state determined by the control device includes all three states selected from the group of states. ### Claim 4 (depends on 3) The imaging system according to claim 3, comprising: a memory to record the check pattern data including the recording check toner image, the conveyance check toner image, and the formation check toner image, the toner imaging device to form the recording check toner image, to form the conveyance check toner image, and to form the formation check toner image on the basis of the check pattern data recorded in the memory. ### Claim 5 (depends on 3) The imaging system according to claim 3, wherein the recording check toner image, the conveyance check toner image, and the formation check toner image have a substantially identical shape. ### Claim 6 (depends on 3) The imaging system according to claim 3, wherein the recording check toner image, the conveyance check toner image, and the formation check toner image have a rectangular shape that extends in a width direction of an image formed by the imaging system. ### Claim 7 (depends on 3) The imaging system according to claim 3, wherein a width of each of the recording check toner image, the conveyance check toner image, and the formation check toner image is equal to or larger than a maximum width of an image formed by the imaging system. ### Claim 8 (depends on 1) The imaging system according to claim 1, wherein the toner imaging device includes an image carrier to carry the toner image, the toner image conveying device includes a transfer belt to which the toner image is to be transferred from the image carrier, the toner image recording device includes a transfer device to transfer the toner image to the medium from the transfer belt, and the control device to determine an additional stop state including at least one state selected from a group of states consisting of a state where the recording check toner image is transferred to the medium, a state where the conveyance check toner image is positioned on the transfer belt, and a state where the formation check toner image is positioned on the image carrier, and wherein during the additional stop state, the control device to: stop a carrying of the toner image by the image carrier, stop a transferring of the toner image by the transfer belt, and stop the conveyance of the medium that is performed by the medium conveying device. ### Claim 9 (depends on 1) The imaging system according to claim 1, wherein the recording check toner image includes a fixing check toner image and a transfer check toner image, the toner imaging device includes an image carrier to carry the toner image, the toner image conveying device includes a transfer belt to which the toner image is to be transferred from the image carrier, the toner image recording device includes a transfer device to transfer the toner image to the medium from the transfer belt and a fixing device to fix the toner image to the medium, and the control device to determine an additional stopping state including at least one state selected from a group of states consisting of a state where the fixing check toner image is fixed to the medium, a state where the transfer check toner image is transferred to the medium and is positioned on the upstream side of the fixing device, a state where the conveyance check toner image is positioned on the transfer belt, and a state where the formation check toner image is positioned on the image carrier, and wherein during the additional stopping state, the control device to: stop a carrying of the toner image by the image carrier, stop a transferring of the toner image by the transfer belt, and stop the conveyance of the medium that is performed by the medium conveying device. ### Claim 10 (depends on 3) The imaging system according to claim 3, wherein the toner imaging device includes a plurality of image carriers, each of the plurality of image carriers to carry the conveyance check toner image and the formation check toner image, at least one of the plurality of image carriers to carry the recording check toner image, and each of the plurality of image carriers to carry the conveyance check toner image so that the conveyance check toner images carried on the plurality of image carriers do not overlap each other on the toner image conveying device. ### Claim 11 (depends on 10) The imaging system according to claim 10, wherein one of the plurality of image carriers is to carry the recording check toner image. ### Claim 12 (depends on 10) The imaging system according to claim 10, wherein each of the plurality of image carriers are to carry the recording check toner image, and the recording check toner images, which are carried on the plurality of image carriers, are to be conveyed by the toner image conveying device in a state where the recording check toner images overlap each other. ### Claim 13 An imaging system comprising: a plurality of image carriers to carry toner images; a transfer belt to which the toner images are to be transferred from the plurality of image carriers, the transfer belt to convey the toner images; a medium conveying device to convey a medium; a transfer device to transfer the toner images conveyed by the transfer belt to the medium conveyed by the medium conveying device; a fixing device to fix the toner images transferred to the medium to the medium; and a control device, wherein at least one of the plurality of image carriers to carry a fixing check toner image and a transfer check toner image, each of the plurality of image carriers to carry a conveyance check toner image and a formation check toner image, the transfer belt to convey the fixing check toner images, the transfer check toner images, and the conveyance check toner images, the transfer device to transfer the fixing check toner images and the transfer check toner images to the medium from the transfer belt, the fixing device to fix the fixing check toner images to the medium, and the control device to determine a stop state where the fixing check toner images are fixed to the medium, the transfer check toner images are transferred to the medium and are positioned on the upstream side of the fixing device, the conveyance check toner images are positioned on the transfer belt between the plurality of image carriers and between the image carrier, which is closest to the transfer device, and the transfer device, respectively, and the formation check toner images are positioned on the plurality of image carriers, respectively, the control device to stop operations of the plurality of image carriers, the transfer belt, and the medium conveying device in the determined stop state. ### Claim 14 (depends on 13) The imaging system according to claim 13, comprising: a memory in which check pattern data including the fixing check toner images, the transfer check toner images, the conveyance check toner images, and the formation check toner images is recorded, the plurality of image carriers to carry the toner images on the basis of the check pattern data recorded in the memory. ### Claim 15 A non-transitory memory device having instructions stored thereon that, in response to execution by a processing device, cause the processing device to perform operations comprising: forming a toner image by a toner imaging device; conveying the toner image formed by the toner imaging device by a toner image conveying device; recording the toner image conveyed by the toner image conveying device on a medium conveyed by the medium conveying device; determining a stop state including at least one selected from a group consisting of a state where a recording check toner image is recorded on the medium, a state where a conveyance check toner image is positioned on the toner image conveying device, and a state where a formation check toner image is positioned on the toner imaging device; and in the determined stop state, stopping the formation of the toner image that is performed by the toner imaging device, stopping the conveyance of the toner image that is performed by the toner image conveying device, and stopping the conveyance of the medium that is performed by the medium conveying device.