# US 10,766,265 B2 · Ink jet printing apparatus > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,766,265 B2 - Document ID: US10766265B2 - Status: Granted - Kind: B2 - Application number: 16/293,204 - Filed: 2019-03-05 - Published: 2019-10-03 - Granted: 2020-09-08 - Earliest claimed: 2018-03-30 - Assignees: Canon Kabushiki Kaisha - Applicants: Canon Kabushiki Kaisha - Inventors: Toshiaki Tokisawa; Junya Kosuge; Kyoshiro Okude; Yumi Mukoyama - Web page: https://patentgrep.com/patent/US10766265B2 ## CPC - B41J 2/16588: {Print heads movable towards the cleaning unit} - B41J 2/17523: {Ink connection} - B41J 2/16517: {Cleaning of print head nozzles (B41J2/16505, B41J2/1707 take precedence)} - B41J 2/175: Ink supply systems {; Circuit parts therefor} - B41J 2/18: Ink recirculation systems - B41J 2/2121: {characterised by dot size, e.g. combinations of printed dots of different diameter} - B41J 29/02: Framework - B41J 29/38: Drives, motors, controls or automatic cut-off devices for the entire printing mechanism - B41J: TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS ## Abstract An object of the present invention is to provide an ink jet printing apparatus whose compactness is improved. The ink jet printing apparatus includes: a print head; an ink tank for each ink color; an ink flow path plate for each ink color having a supply flow path that guides the ink supplied from the ink tank to the print head and a recovery flow path that guides the ink recovered from the print head to the ink tank; a flow path concentration plate in which the supply flow path and the recovery flow path for each ink color are concentrated and which guides the ink between the ink flow path plate and the print head; and one or a plurality of function parts provided within a range of a space demarcated by the ink flow path plate and the flow path concentration plate. ## Claims ### Claim 1 An ink jet printing apparatus comprising: an ink tank for each ink color that stores ink to be supplied to a print head that ejects ink; an ink flow path plate for each ink color, the ink flow path plate having a supply flow path that guides the ink supplied from the ink tank to the print head; a flow path concentration plate in which is concentrated the supply flow path for each ink color and which guides the ink between the ink flow path plate and the print head, the flow path concentration plate being inclined with respect to the ink flow path plate; and one or a plurality of function parts provided within a space demarcated by both of (a) the ink flow path plate and (b) the flow path concentration plate, the one or a plurality of function parts being configured to act on the supply flow path inside the ink flow path plate. ### Claim 2 (depends on 1) The ink jet printing apparatus according to claim 1, wherein in a case where the direction of gravity is taken to be a z-direction, a direction in which the ink flow path plate for each ink color is arrayed to be a y-direction, and a direction perpendicular to the z-direction and the y-direction to be an x-direction, the ink flow path plate extends in the xy-direction and the flow path concentration plate extends in the yz-direction. ### Claim 3 (depends on 1) The ink jet printing apparatus according to claim 1, wherein the ink flow path plate and the flow path concentration plate are perpendicular to each other. ### Claim 4 (depends on 1) The ink jet printing apparatus according to claim 1, wherein the flow path concentration plate is used in common for all ink colors. ### Claim 5 (depends on 1) The ink jet printing apparatus according to claim 1, wherein the flow path concentration plate is arranged longitudinally with a connection portion with the ink flow path plate being located below. ### Claim 6 (depends on 1) The ink jet printing apparatus according to claim 1, wherein each flow path concentrated in the flow path concentration plate includes (a) a portion that guides the ink approximately in parallel to a direction in which the ink flow path plate for each ink color is arrayed and (b) a portion that guides the ink along the direction of gravity. ### Claim 7 (depends on 1) The ink jet printing apparatus according to claim 1, wherein the space is located above the ink flow path plate in the direction of gravity and between the ink tank and the flow path concentration plate. ### Claim 8 (depends on 1) The ink jet printing apparatus according to claim 1, further comprising: a drive mechanism for driving the one or the plurality of function parts provided within the space. ### Claim 9 (depends on 8) The ink jet printing apparatus according to claim 8, wherein the one or the plurality of function parts includes at least one of: a drive valve for opening and closing a flow path by the drive mechanism; a differential pressure valve that opens and closes a flow path in a case where a predetermined pressure is produced in a first direction; a first pump that is arranged in the supply flow path and driven by the drive mechanism; and a buffer chamber. ### Claim 10 (depends on 1) The ink jet printing apparatus according to claim 1, wherein the ink flow path plate has a recovery flow path that guides the ink recovered from the print head to the ink tank, the recovery flow path for each ink color being concentrated in the flow path concentration plate. ### Claim 11 (depends on 10) The ink jet printing apparatus according to claim 10, further comprising: a first linking tube that guides the ink supplied from the ink tank via the flow path concentration plate to the print head; and a second linking tube that guides the ink recovered from the print head to the flow path concentration plate, wherein inside the first linking tube, the supply flow path for each ink color is sectioned, which is connected with the supply flow path inside the flow path concentration plate and inside the second linking tube, the recovery flow path for each ink color is sectioned, which is connected with the recovery flow path inside the flow path concentration plate. ### Claim 12 (depends on 10) The ink jet printing apparatus according to claim 10, further comprising: a drive mechanism for driving the one or the plurality of function parts provided within the space, wherein the one or the plurality of function parts includes a second pump that is arranged in the recovery flow path and driven by the drive mechanism. ### Claim 13 (depends on 1) The ink jet printing apparatus according to claim 1, wherein the ink flow path plate is provided below the ink tank in the direction of gravity. ### Claim 14 An ink jet printing apparatus comprising: a first ink tank that stores a first ink to be supplied to a print head; a second ink tank that stores a second ink to be supplied to the print head, the print head being able to eject the first ink and the second ink; a first ink flow path plate having a supply flow path for the first ink; a second ink flow path plate having a second supply flow path for the second ink; a flow path concentration plate in which are concentrated the first supply flow path and the second supply flow path, the flow path concentration plate being inclined with respect to the first ink flow path plate and the second ink flow path plate; and one or a plurality of function parts provided for each of the first ink flow path plate and the second ink flow path plate, which is provided within a space demarcated by both of (a) the first ink flow path plate and the second ink flow path plate and (b) the flow path concentration plate, the one or a plurality of function parts being configured to act on the first supply flow path inside the first ink flow path plate. ### Claim 15 (depends on 14) The ink jet printing apparatus according to claim 14, wherein in a case where the direction of gravity is taken to be a z-direction, a direction in which the first ink flow path plate and the second ink flow path plate are arrayed to be a y-direction, and a direction perpendicular to the z-direction and the y-direction to be an x-direction, the first ink flow path plate and the second ink flow path plate extend in the xy-direction and the flow path concentration plate extends in the yz-direction. ### Claim 16 (depends on 14) The ink jet printing apparatus according to claim 14, wherein the first ink flow path plate and the flow path concentration plate are perpendicular to each other, and wherein the second ink flow path plate and the flow path concentration plate are perpendicular to each other. ### Claim 17 (depends on 14) The ink jet printing apparatus according to claim 14, wherein the flow path concentration plate is arranged longitudinally with a connection portion with the first ink flow path plate and a connection portion with the second ink flow path plate being located below. ### Claim 18 (depends on 14) The ink jet printing apparatus according to claim 14, wherein the space is located above the first ink flow path plate and the second ink flow path plate in the direction of gravity and between the first ink tank and the second ink tank, and the flow path concentration plate. ### Claim 19 (depends on 14) The ink jet printing apparatus according to claim 14, further comprising: a drive mechanism for driving the one or the plurality of function parts provided within the space. ### Claim 20 (depends on 19) The ink jet printing apparatus according to claim 19, wherein the one or the plurality of function parts includes at least one of: a drive valve for opening and closing a flow path by the drive mechanism; a differential pressure valve that opens and closes a flow path in a case where a predetermined pressure is produced in a first direction; a first pump that is arranged in the supply flow path and driven by the drive mechanism; and a buffer chamber.