JP2003145790A - Ink jet recorder - Google Patents

Ink jet recorder

Info

Publication number
JP2003145790A
JP2003145790A JP2001344834A JP2001344834A JP2003145790A JP 2003145790 A JP2003145790 A JP 2003145790A JP 2001344834 A JP2001344834 A JP 2001344834A JP 2001344834 A JP2001344834 A JP 2001344834A JP 2003145790 A JP2003145790 A JP 2003145790A
Authority
JP
Japan
Prior art keywords
ink
recording head
ink tank
tank
recording apparatus
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
JP2001344834A
Other languages
Japanese (ja)
Inventor
Shozo Hattori
Koki Hayashi
Tatsuo Kusushiro
Keisuke Matsuo
Hirofumi Okuhara
宏文 奥原
省三 服部
圭介 松尾
弘毅 林
達雄 楠城
Original Assignee
Canon Inc
キヤノン株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Canon Inc, キヤノン株式会社 filed Critical Canon Inc
Priority to JP2001344834A priority Critical patent/JP2003145790A/en
Publication of JP2003145790A publication Critical patent/JP2003145790A/en
Withdrawn legal-status Critical Current

Links

Abstract

PROBLEM TO BE SOLVED: To stably supply ink without depending on a pressure difference between a recording head and an ink tank. A discharge signal for discharging ink is also input to an ink supply unit, and the ink supply unit is controlled by the discharge signal.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to ink supply for an ink jet recording apparatus that ejects ink for recording.

[0002]

2. Description of the Related Art Conventionally, as an ink supply method for an ink jet recording apparatus, a method of providing a sub ink tank 4 separately from an ink tank 2 in the vicinity of the recording head 1 shown in FIG. 4 and a recording head 1 shown in FIG. There is a method of providing the ink tank 2 in the vicinity.

In the method of providing the sub ink tank 4 separately from the ink tank 2 in the vicinity of the recording head 1 shown in FIG.
By arranging the sub ink tank 4 at a position lower than the recording head 1, the ink is retained during non-recording, and the ink is supplied from the sub ink tank 4 to the recording head 1 by the capillary force of the nozzle during recording. When the water level in the sub ink tank 4 decreases below a certain level, a certain amount of ink is supplied from the ink tank 2 to the sub ink tank 4 by a pump (not shown). This method is suitable for the ink tank 2 having a large ink capacity.

In the method of providing the ink tank 2 in the vicinity of the recording head 1 shown in FIG. 5, a porous member is generally incorporated as an ink holding member for holding ink in the ink tank 2, and non-recording is performed. At the time, the ink is held by the capillary force of the porous member, and at the time of recording, the ink is supplied from the ink tank 2 to the recording head 1 by the capillary force of the nozzle that ejects the ink. This method is suitable for downsizing the recording device.

[0005]

However, the above-mentioned conventional example has the following drawbacks.

Since any of these methods has a structure in which ink is held / supplied depending on the pressure difference between the recording head and the ink tank, the position at which the ink tank is installed with respect to the recording head is greatly limited.

The ink holding power of the ink tank is preferably large during non-printing, and is preferably small during printing to supply ink smoothly. Therefore, it is necessary to set the values satisfying the contradictory conditions. However, even then, the pressure applied to the print head changes depending on the amount of ink in the ink tank or sub ink tank, and the ejection amount may change, or in the worst case, ink may run out. As the ink jet recording apparatus increases in speed and the amount of ink supplied from the ink tank to the recording head per unit time increases, it becomes difficult to satisfy the condition itself.

Even in the non-recording state, ink may move due to environmental changes such as temperature and atmospheric pressure, and ink may not be stably supplied, or ink may leak.

The present invention has been made in the process of earnestly researching these problems, and an object thereof is to stably supply ink without depending on a pressure difference between a recording head and an ink tank. An object of the present invention is to provide a highly reliable inkjet recording device.

[0010]

To achieve the above object, the present invention provides a recording head for ejecting ink, an ink tank for storing ink, and an ink supply for supplying ink from the ink tank to the recording head. In the inkjet recording apparatus having the means, the ink supply means is controlled by a control signal for ejecting ink from the recording head.

The present invention can be summarized in the following configurations if it is summarized and summarized above.

(1) In an ink jet recording apparatus having a recording head for ejecting ink, an ink tank for storing the ink, and an ink supply means for supplying the ink from the ink tank to the recording head, the ink is ejected from the recording head. An ink jet recording apparatus, wherein an ink supply unit is controlled by a control signal for ejecting the ink.

(2) The ink jet recording apparatus according to (1), wherein a plurality of the ink supply means are arranged in series.

(3) The ink jet recording apparatus according to (1), wherein a plurality of the ink supply means are arranged in parallel.

(4) The ink jet recording apparatus according to any one of the above (1) to (3), wherein the ink supply means is arranged in a recording head.

[0016]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, embodiments of the present invention will be described with reference to the drawings.

(First Embodiment) FIG. 1 is a schematic view showing a first embodiment of the present invention, in which 1 is a recording head, 2 is an ink tank, 3 is an ink from the ink tank to the recording head. It represents a pump for supplying.

In the recording apparatus of this structure, an ejection signal for controlling the recording head 1 to eject ink is generated in the recording apparatus and sent to the recording head 1 to perform desired recording. At this time, the discharge signal is also input to the pump 3 at the same time. In the pump 3, the ink amount consumed by the recording head 1 is calculated from the input ejection signal and the preset ejection amount, and the ink amount is consumed from the ink tank 2 to the recording head 1.
To record and supply at the same time. In this way, since the pump is also controlled by the ejection signal, the required amount of ink from the ink tank 2 to the recording head 1 can be supplied to the recording head 1 without depending on the pressure difference between the recording head 1 and the ink tank 2. A stable supply can always be provided. In addition, since the ink tank and the recording head are blocked by the pump during non-recording, it is possible to prevent the movement of the ink due to changes in temperature and atmospheric pressure.

(Second Embodiment) FIG. 2 is a schematic view showing a second embodiment of the present invention, and 3a and 3b show pumps for supplying ink from the ink tank 2 to the recording head 1. As shown in FIG. Therefore, pumps for supplying ink from the ink tank 2 to the recording head 1 are arranged in series. At this time, the pressure between the ink tank 2 and the pump 3b is Pt, the pressure between the pump 3b and the pump 3a is Pp, and the pressure between the pump 3a and the recording head 1 is Ph.

The pressure Pp can be controlled by alternately operating the pumps 3a and 3b. If the pressure Pp is set higher than the pressure Ph, the recording head 1
The ink can be supplied to the pump 3b in a shorter time. If the pressure Pp is set to be lower than the pressure Pt, the ink can be supplied from the ink tank 2 to the pump 3b in a shorter time.

By the way, it is known that when ink is ejected, the pressure wave is also transmitted to the ink tank 2 side and affects the subsequent ejection, and the pressure wave of the pressure wave depends on whether the pump is open or closed. Since the way of transmission changes, it is desirable to always keep the pump open or closed when performing discharge. Alternately operating the pump 3a and the pump 3b means that either the pump 3a or the pump 3b is always in the closed state, so that the manner in which the discharge pressure wave is transmitted can be stabilized, whereby stable discharge can be achieved. realizable.

(Third Embodiment) FIG. 3 is a schematic diagram showing a third embodiment of the present invention, in which pumps for supplying ink from the ink tank 2 to the recording head 1 are arranged in parallel.

By arranging the pumps in parallel, for example, only one pump is used when the ink supply amount is small in the high-quality mode or the like, and two pumps are used when the ink supply amount is large in the high-speed mode or the like. As described above, it is possible to finely control the ink supply amount depending on the recording mode.

Further, by setting one of the pumps having a small flow rate and the other one having a large flow rate, it is possible to control the flow rate more finely.
The same effect can be obtained by increasing the number of pieces, such as four pieces.

Further, by applying the micromachine technology,
If a pump is configured to correspond to each nozzle in the print head, not only can the ink supply be controlled more precisely, but also the ink can be prevented from flowing to the ink tank during ejection. Therefore, the ejection efficiency can be significantly improved.

The ink supply means in the present invention is not particularly limited in its form as long as the ink supply can be controlled by an ejection signal and the movement of the ink between the recording head and the ink tank can be blocked. When is provided at a position higher than the recording head, a simple valve configuration may be used.

As the control signal for controlling the ink supply means, it is desirable to directly input the discharge signal for performing the discharge in order to reduce the control load of the recording apparatus, but it is processed so that the ink supply means can be easily controlled. It doesn't matter.

The ink supply means control signal may be generated at the same time as the ejection signal is generated in the recording head.

By forming a part between the recording head and the ink supply means by a flexible member, the pressure applied to the recording head can be further stabilized.

The recording apparatus can be miniaturized by integrally forming the ink supply means with the recording head.

[0031]

As described above, according to the present invention,
By controlling the ink supply unit by the ejection signal, it is possible to stably supply the required amount of ink when necessary, without depending on the pressure difference between the recording head and the ink tank. Further, since the recording head and the ink tank are shut off during non-recording, the ink does not move even when the environment such as temperature and atmospheric pressure changes, and a highly reliable inkjet recording device that does not leak ink is provided. be able to.

[Brief description of drawings]

FIG. 1 is a schematic diagram of an inkjet recording head according to a first embodiment of the present invention.

FIG. 2 is a schematic diagram of an inkjet recording head according to a second embodiment of the present invention.

FIG. 3 is a schematic diagram of an inkjet recording head according to a third embodiment of the present invention.

FIG. 4 is a schematic diagram of an inkjet recording head according to a conventional technique.

FIG. 5 is a schematic diagram of an inkjet recording head according to a conventional technique.

[Explanation of symbols]

1 recording head 2 ink tank 3, 3a, 3b pump 4 sub ink tank

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Hiroki Hayashi             3-30-2 Shimomaruko, Ota-ku, Tokyo             Non non corporation (72) Inventor Hirofumi Okuhara             3-30-2 Shimomaruko, Ota-ku, Tokyo             Non non corporation (72) Inventor Tatsuo Kusunoki             3-30-2 Shimomaruko, Ota-ku, Tokyo             Non non corporation F-term (reference) 2C056 EA26 EC17 EC19 EC40 KB02

Claims (4)

[Claims]
1. An ink jet recording apparatus comprising: a recording head for ejecting ink; an ink tank for storing the ink; and an ink supply means for supplying the ink from the ink tank to the recording head. An ink jet recording apparatus characterized in that an ink supply unit is controlled by a control signal for discharging.
2. The ink jet recording apparatus according to claim 1, wherein a plurality of the ink supply units are arranged in series.
3. The inkjet recording apparatus according to claim 1, wherein a plurality of the ink supply units are arranged in parallel.
4. The ink jet recording apparatus according to claim 1, wherein the ink supply unit is arranged inside a recording head.
JP2001344834A 2001-11-09 2001-11-09 Ink jet recorder Withdrawn JP2003145790A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2001344834A JP2003145790A (en) 2001-11-09 2001-11-09 Ink jet recorder

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2001344834A JP2003145790A (en) 2001-11-09 2001-11-09 Ink jet recorder

Publications (1)

Publication Number Publication Date
JP2003145790A true JP2003145790A (en) 2003-05-21

Family

ID=19158294

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2001344834A Withdrawn JP2003145790A (en) 2001-11-09 2001-11-09 Ink jet recorder

Country Status (1)

Country Link
JP (1) JP2003145790A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007050565A (en) * 2005-08-16 2007-03-01 Fujifilm Corp Ink supply apparatus, inkjet recording device, and ink cartridge
US7543922B2 (en) * 2005-03-18 2009-06-09 Fujifilm Corporation Liquid supply apparatus and method, and inkjet recording apparatus
JP2010082811A (en) * 2008-09-29 2010-04-15 Fujifilm Corp Liquid ejection apparatus
US7758136B2 (en) 2004-03-30 2010-07-20 Fujifilm Corporation Ink supply device for inkjet printer
KR101989375B1 (en) * 2018-11-16 2019-06-14 주식회사 고산테크 Ink circulation supply system and method for ink-jet head

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7758136B2 (en) 2004-03-30 2010-07-20 Fujifilm Corporation Ink supply device for inkjet printer
US7543922B2 (en) * 2005-03-18 2009-06-09 Fujifilm Corporation Liquid supply apparatus and method, and inkjet recording apparatus
JP2007050565A (en) * 2005-08-16 2007-03-01 Fujifilm Corp Ink supply apparatus, inkjet recording device, and ink cartridge
JP2010082811A (en) * 2008-09-29 2010-04-15 Fujifilm Corp Liquid ejection apparatus
KR101989375B1 (en) * 2018-11-16 2019-06-14 주식회사 고산테크 Ink circulation supply system and method for ink-jet head

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Legal Events

Date Code Title Description
A300 Withdrawal of application because of no request for examination

Free format text: JAPANESE INTERMEDIATE CODE: A300

Effective date: 20050201