# US 8,465,126 B2 · Liquid jet head and liquid jet apparatus > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 8,465,126 B2 - Document ID: US8465126B2 - Status: Granted - Kind: B2 - Application number: 12/928,262 - Filed: 2010-12-07 - Published: 2011-06-23 - Granted: 2013-06-18 - Earliest claimed: 2009-12-21 - Assignees: Sii Printek Inc. - Applicants: Tetsuya Murase - Inventors: Tetsuya Murase - Web page: https://patentgrep.com/patent/US8465126B2 ## CPC - B41J 2/14233: {of film type, deformed by bending and disposed on a diaphragm} - B41J 2/055: Devices for absorbing or preventing back-pressure - Y10T 29/49401: Fluid pattern dispersing device making, e.g., ink jet - B41J: TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS - Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION ## Abstract A liquid jet head has an actuator with grooves arranged on a surface of a substrate. The actuator is configured to discharge liquid from nozzles communicating with respective ones of the grooves. A flow path member supplies the liquid to the grooves of the actuator. A damper member is provided between the actuator and the flow path member for coupling the actuator and the flow path member to each other. The damper member is bonded with an adhesive to each of the actuator and the flow path member. ## Claims ### Claim 1 A liquid jet head, comprising: an actuator having a plurality of long grooves arranged on a surface of a substrate, the actuator being configured to discharge liquid from nozzles communicating with respective ones of the plurality of long grooves; a flow path member for supplying the liquid to the plurality of long grooves of the actuator; and a damper member provided between the actuator and the flow path member for coupling the actuator and the flow path member to each other, the damper member being bonded with an adhesive to each of the actuator and the flow path member. ### Claim 2 (depends on 1) A liquid jet head according to claim 1; wherein the damper member comprises a rubber member. ### Claim 3 (depends on 1) A liquid jet head according to claim 1; wherein the damper member comprises an elastomer member. ### Claim 4 (depends on 1) A liquid jet head according to claim 1; wherein the damper member comprises a first damper member; and further comprising: a base member for supporting the actuator; and a second damper member provided between the base member and the actuator for coupling the base member and the actuator to each other. ### Claim 5 (depends on 4) A liquid jet head according to claim 4; wherein: the actuator comprises a first actuator and a second actuator stacked together; and the liquid jet head further comprises a third damper member provided between the first actuator and the second actuator for coupling the first actuator and the second actuator to each other. ### Claim 6 (depends on 5) A liquid jet head according to claim 5; wherein the third damper member is provided between a rear surface of a substrate of the first actuator and a rear surface of a substrate of the second actuator. ### Claim 7 (depends on 5) A liquid jet head according to claim 5; wherein: the actuator further comprises a cover plate stacked on the surface of the substrate so as to block openings of the plurality of long grooves except for a part of the plurality of long grooves; and the third damper member is provided between a rear surface of a substrate of the first actuator and a cover plate of the second actuator. ### Claim 8 (depends on 1) A liquid jet head according to claim 1; wherein the damper member has an average thickness of 0.2 mm to 2.0 mm. ### Claim 9 (depends on 1) A liquid jet head according to claim 1; wherein the damper member is resistant to a solvent. ### Claim 10 (depends on 1) A liquid jet head according to claim 1; wherein the damper member is resistant to oil. ### Claim 11 (depends on 1) A liquid jet apparatus, comprising: the liquid jet head according to claim 1; a moving mechanism for reciprocating the liquid jet head; a liquid supply tube for supplying liquid to the liquid jet head; and a liquid tank for supplying the liquid to the liquid supply tube. ### Claim 12 (depends on 1) A liquid jet head according to claim 1; wherein the damper member is made of a material resistant to ink. ### Claim 13 (depends on 12) A liquid jet head according to claim 12; wherein the damper member is made of one of a polyethylene rubber material and a polypyrene rubber material. ### Claim 14 (depends on 12) A liquid jet head according to claim 12; wherein each of the damper member and the adhesive is resistant to ink. ### Claim 15 (depends on 14) A liquid jet head according to claim 14; wherein the adhesive comprises an epoxy adhesive. ### Claim 16 (depends on 4) A liquid jet head according to claim 4; wherein the second damper member is made of a material resistant to ink. ### Claim 17 An ink jet head comprising: an actuator having a plurality of grooves arranged on a surface of a substrate and being configured to discharge ink from nozzles communicating with respective ones of the plurality of grooves; a flow path member connected to the actuator for supplying ink to the plurality of grooves of the actuator; and a damper member disposed between the actuator and the flow path member for preventing propagation to the flow path member of vibrations generated during discharge of ink by the actuator, the damper member being bonded with an adhesive to each of the actuator and the flow path member. ### Claim 18 (depends on 17) An ink jet head according to claim 17; wherein each of the damper member and the adhesive is made of a material resistant to the ink. ### Claim 19 (depends on 18) An ink jet head according to claim 18; wherein the damper member is made of one of a polyethylene rubber material and a polypyrene rubber material; and wherein the adhesive comprises an epoxy adhesive. ### Claim 20 (depends on 17) An ink jet apparatus comprising: an ink jet head according to claim 17; a moving mechanism for reciprocating the ink jet head; a ink supply tube for supplying ink to the ink jet head; and an ink tank for supplying the ink to the ink supply tube.