IPC분류정보
국가/구분 |
United States(US) Patent
공개
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0310788
(2015-05-15)
|
공개번호 |
US-0087868
(2017-03-30)
|
우선권정보 |
JP-2014-102908 (2014-05-16) |
국제출원번호 |
PCT/JP2015/064115
(2015-05-15)
|
발명자
/ 주소 |
- MIYASHITA, EIJI
- TAKEUCHI, AKIRA
- SATO, Tomoya
|
출원인 / 주소 |
- MIMAKI ENGINEERING CO., LTD.
|
인용정보 |
피인용 횟수 :
0 인용 특허 :
0 |
초록
▼
A damper and an ink circulation method capable of suppressing deposition of color materials of ink are provided. A damper is a hydraulic head difference type damper for supplying ink supplied from an ink tank of an inkjet printer by a hydraulic head difference, into a head. The damper has a supply c
A damper and an ink circulation method capable of suppressing deposition of color materials of ink are provided. A damper is a hydraulic head difference type damper for supplying ink supplied from an ink tank of an inkjet printer by a hydraulic head difference, into a head. The damper has a supply chamber for temporarily storing ink, an ink chamber connected to the supply chamber through a connection passage and configured to supply the ink into the head, and an on-off valve. The on-off valve opens the connection passage if the ink contained in the ink chamber decreases, and blocks the connection passage if the ink contained in the ink chamber increases. A guide port for guiding the ink contained in the ink chamber to a circulation tube for circulating the ink between the ink chamber and the ink tank is formed in the ink chamber.
대표청구항
▼
1. A hydraulic head difference type damper for supplying ink supplied from an ink tank of an inkjet printer by a hydraulic head difference into a head for ejecting the ink, comprising: a supply chamber configured to temporarily accommodate the ink;an ink chamber connected to the supply chamber throu
1. A hydraulic head difference type damper for supplying ink supplied from an ink tank of an inkjet printer by a hydraulic head difference into a head for ejecting the ink, comprising: a supply chamber configured to temporarily accommodate the ink;an ink chamber connected to the supply chamber through a connection passage and configured to supply ink to the head; andan on-off valve including a sealing body for blocking the connection passage, a flexible film attached so as to cover the ink chamber from an outside, an opening body configured to open the sealing body in cooperation with the flexible film, and an opening spring for biasing the opening body toward the outside of the ink chamber, and configured to move the sealing body toward one side by the opening body, thereby opening the connection passage, as the flexible film bends toward an inside of the ink chamber against a biasing force of the opening spring, if the ink contained in the ink chamber decreases, and move the sealing body toward the other side, thereby blocking the connection passage, as the flexible film bends toward the outside of the ink chamber, if the ink contained in the ink chamber increases,wherein a guide port for guiding the ink to a circulation tube for circulating the ink between the ink chamber and the ink tank side is formed in the ink chamber. 2. The damper according to claim 1, wherein: in a state where the damper has been installed in the inkjet printer, the guide port is disposed below an opening of the connection passage in the ink chamber. 3. The damper according to claim 1, wherein: in a state where the damper has been installed in the inkjet printer, an ink inlet for receiving ink from the ink tank and guiding the received ink into the supply chamber, and an ink circulation port for guiding the ink guided from the guide port into the ink chamber into the circulation tube are foamed in an upper surface. 4. An ink circulation method which is usable in an inkjet printer having an ink supply passage for storing ink and supplying ink of an ink tank to a head for ejecting, and having the ink tank, a damper, and a head disposed in this order from the upstream side toward the downstream side of the ink supply passage, and circulates the ink between the head side and the ink tank side, wherein: the damper includesa supply chamber configured to temporarily accommodate the ink,an ink chamber connected to the supply chamber through a connection passage and configured to supply ink to the head, andan on-off valve including a sealing body for blocking the connection passage, a flexible film attached so as to cover the ink chamber from an outside, an opening body configured to open the sealing body in cooperation with the flexible film, and an opening spring for biasing the opening body toward the outside of the ink chamber, and configured to move the sealing body toward one side by the opening body, thereby opening the connection passage, as the flexible film bends toward an inside of the ink chamber against a biasing force of the opening spring, if the ink contained in the ink chamber decreases, and move the sealing body toward the other side, thereby blocking the connection passage, as the flexible film bends toward the outside of the ink chamber, if the ink contained in the ink chamber increases, andin a state where a nozzle of the head and a flow passage of the damper for supplying ink to the head are connected, the ink contained in the ink chamber is guided from a guide port formed in the ink chamber of the damper to one of a supply tube of the ink supply passage and the ink tank. 5. The ink circulation method according to claim 4, wherein: the supply tube is directly connected to the ink tank and an ink inlet of the damper, and a circulation tube of the ink supply passage is directly connected to an ink circulation port of the damper and the supply tube, and a pump provided for the circulation tube is driven so as to maintain a meniscus surface of the ink formed at a leading end of the nozzle of the head. 6. The ink circulation method according to claim 5, wherein: in a state where the damper has having been installed in the inkjet printer, the circulation tube is disposed below the supply tube. 7. An ink circulation method which is usable in an inkjet printer having an ink supply passage for storing ink and supplying ink of an ink tank to a head for ejecting, and having the ink tank, a damper, and a head disposed in this order from the upstream side toward the downstream side of the ink supply passage, and circulates the ink between the head side and the ink tank side, wherein: the damper includesa supply chamber configured to temporarily accommodate the ink,an ink chamber connected to the supply chamber through a connection passage and configured to supply ink to the head, andan on-off valve including a sealing body for blocking the connection passage, a flexible film attached so as to cover the ink chamber from an outside, an opening body configured to open the sealing body in cooperation with the flexible film, and an opening spring for biasing the opening body toward the outside of the ink chamber, and configured to move the sealing body toward one side by the opening body, thereby opening the connection passage, as the flexible film bends toward an inside of the ink chamber against a biasing force of the opening spring, if the ink contained in the ink chamber decreases, and move the sealing body toward the other side, thereby blocking the connection passage, as the flexible film bends toward the outside of the ink chamber, if the ink contained in the ink chamber increases,a circulation tube is connected to any one of an end portion of a supply tube of the ink supply passage positioned close to the damper on the upstream side from the damper, an end portion of the supply tube positioned close to the ink tank on the downstream side from the ink tank, and the ink tank, andwhen the sealing body blocks the connection passage, a pump is driven so as to circulate the ink between the supply tube and the circulation tube. 8. The ink circulation method according to claim 7, wherein: the circulation tube is connected to the ink tank. 9. The ink circulation method according to claim 7, wherein: the pump is driven such that a pressure of the ink in such a direction that the sealing body blocks the connection passage acts on the supply chamber. 10. The ink circulation method according to claim 7, wherein: during printing of the inkjet printer, the supply tube supplies the ink from the ink tank into the head through the damper by a hydraulic head difference, andthe pump is provided only for the circulation tube. 11. The ink circulation method according to claim 7, wherein: when printing of the inkjet printer is stopped, the pump is driven so as to circulate the ink. 12. The damper according to claim 2, wherein: in a state where the damper has been installed in the inkjet printer, an ink inlet for receiving ink from the ink tank and guiding the received ink into the supply chamber, and an ink circulation port for guiding the ink guided from the guide port into the ink chamber into the circulation tube are formed in an upper surface. 13. The ink circulation method according to claim 8, wherein: during printing of the inkjet printer, the supply tube supplies the ink from the ink tank into the head through the damper by a hydraulic head difference, andthe pump is provided only for the circulation tube. 14. The ink circulation method according to claim 9, wherein: during printing of the inkjet printer, the supply tube supplies the ink from the ink tank into the head through the damper by a hydraulic head difference, andthe pump is provided only for the circulation tube.
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