Liquid supply device and liquid ejecting apparatus
A technology of liquid supply and liquid ejection head, which is applied in printing and other directions, and can solve problems such as ejection and inability to supply ink
Active Publication Date: 2012-11-07
SEIKO EPSON CORP
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Problems solved by technology
Therefore, while the pump is sucking and driving, since the ink in the ink channel on the downstream side downstream of the pump is negatively pressured toward the upstream side, ink cannot be supplied to the recording head on the downstream side in a pressurized state.
Therefore, in a printer equipped with a pump in the middle of the ink flow path between the ink cartridge and the recording head, there is a problem that the ink for printing may not be ejected from the recording head for a moment when the pump is driven.
Method used
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[0033] Below, refer to Figure 1 ~ Figure 3 An embodiment of an inkjet recording apparatus (hereinafter referred to as a "printer") that embodies the present invention as a type of liquid ejection apparatus will be described.
[0034] Such as figure 1 As shown, the printer 11 of the present embodiment has: a recording head 12 as a liquid ejection head that ejects ink (liquid) to a target (not shown), and an ink cartridge 13 that is housed as a liquid supply source supplied to the recording head 12 The ink in the ink supply device 14 is the liquid supply device. An ink flow path (liquid supply flow path) 15 is provided in the ink supply device 14. The ink flow path 15 is connected to the ink cartridge 13 at the upstream end and connected to the recording head 12 at the downstream end. The upstream side supplies ink to the downstream side that becomes the recording head 12 side.
[0035] In addition, in the printer 11, a plurality of ink supply devices 14 are provided corresponding...
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The present invention provides a liquid supply device and a liquid ejection apparatus containing the liquid supply device, having the advantage that liquid can be supplied to a downstream side consuming liquid under pressure even if a pump installed in a liquid supply channel is pumping liquid into the pump chamber. The invention comprises an ink flow path (15) supplying ink to the ink consuming downstream side from the upstream side of an ink box (13), a pump (43) driving a part of the ink flow path (15) as a pump chamber, a liquid attracting side valve (41) installed in the ink flow path and in the upstream side of the pump chamber and only permitting ink to flow from the upstream side toward the downstream side, a ball value (39) installed in the ink flow path (15) and in the downstream side of the pump chamber and only permitting ink to flow from the upstream side toward the downstream side ,and a liquid ejection side value (45) installed in the ink flow path (15) and in the downstream side of the ball value. The liquid ejection side value (45) is used for storing ink in a pressure-accumulated state.
Description
Technical field [0001] The present invention relates to a liquid supply device and a liquid ejection device that supply liquid from an upstream side that becomes a liquid supply source side to a downstream side where the liquid is consumed. Background technique [0002] Conventionally, as a liquid ejecting apparatus that ejects a liquid to a target, an inkjet printer (hereinafter referred to as "printer") is known. This printer ejects ink (liquid) supplied to a recording head (liquid ejection head) from nozzles formed on the recording head to perform printing on a target recording medium. In addition, among such printers, a printer as described in Patent Document 1 has recently been proposed. The printer is provided with an ink flow path (liquid supply flow path) between the ink cartridge (liquid supply source) and the recording head. A pump that pressurizes and supplies ink from the ink cartridge side to the recording head side to pump. [0003] That is, in the printer of Patent...
Claims
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IPC IPC(8): B41J2/175
Inventor 横内秀弥
Owner SEIKO EPSON CORP