JPH08118672A - Ink jet recorder, filter unit, and filter fixing method to the unit - Google Patents

Abstract

PURPOSE: To completely remove bubbles from a filter by fixing the filter to an ink supply passage by a sufficient strength and improving the adhesiveness of a valve to the filter. CONSTITUTION: A filter 15 and a valve 101 so provided as to be in close contact with the filter 15 are arranged at an ink supply passage for supplying in from an ink tank to a recording head. The valve 101 is brought into close contact with the filter 15 surface by means for bringing the valve 101 into close contact with the filter 15 to press to remove bubbles from the filter 15. A plurality of fixed ribs 15A, 15B are provided at the fixed part of the filter 15 of the ink supply passage, and the same surface side of the outer periphery of the filter is fixed to the fixing part of the filter 15 by the plurality of the ribs 15A, 15B.

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention
Ink with a filter to remove dust inside
Jet recording device, its filter unit, and
And how to fix the filter to the filter unit
You. Ink supply system for ink jet recording apparatus
Are formed with minute ink discharge ports and liquid paths.
Therefore, if there is a small amount of dust in the ink,
At the ink ejection port, the ink ejection port or liquid path is blocked.
There is a risk of clogging or obstruction of ink flow.
In such a device, remove these dusts, etc.
Is essential. As a means to that end,
Is the ink supplied from the ink tank to the recording head.
The method of arranging a filter in the path and filtering the ink is not used.
Have been. However, in such an ink supply system,
If you use a means with a filter,
Not even the bubbles in the ink gather on this filter surface
And block the filter surface to cause ink ejection movement during recording.
It may hinder the flow of ink during production.
You. Therefore, one of the methods to remove this bubble is
As a result, during the recovery operation of the print head (cleaning
Time), that is, including print head and ink supply system bubbles
Dispose of the ink in the waste ink storage area, etc.
Not forcibly send new ink to the print head
The nozzle of the recording head can be activated by operating the pump during operation.
Ink is sucked to the side of the ink tank
Although a method of sucking out the bubbles that have taken up is being considered,
If the size of the bubbles attached to the target surface is small,
The smaller the size, the harder it is to remove.
It was difficult to remove the bubbles. Therefore, the Applicants have removed these small bubbles.
Filter to cover the filter surface to remove
On the ink tank side of the
As described above, when sucking ink to the print head side,
When the ink is sucked, the valve sucks toward the recording head.
Is adhered to the filter surface, and as a valve when the contact is made
Therefore, small particles attached to the side of the ink tank of the filter
We devised a method to push out bubbles to the recording head side and remove them.
(Japanese Patent Application No. 5-157052). [0005] However, the present invention
When the above means are used by the examination of the
It is reported that the problems described in (1) and (2) will occur.
I saw. (1) In (a), (b), (c), and (d) of FIG.
The fixing ribs on the filter unit
It is shown how to fix it to the toe. This way,
The filter fixing part provided in the Luther unit has a single
Set up a (single) fixing rib and use the welding head to fix this rib.
Melt and weld the filter with heat or ultrasonic waves, but
Since there is only one fixed rib, sufficient welding strength cannot be secured.
Shown in Fig. 10 due to vibration during recording head assembly and shock during product transportation.
Part of the outer periphery of the filter is peeled off.
, The dust passes in the direction indicated by the arrow in the figure, and the recording head
It could clog the door. (2) In (a), (b), (c), and (d) of FIG.
To solve the problem, wrap the tip of the filter periphery.
The conventional example is shown in which the fixing strength is improved by fixing
Have been. This increases the welding strength of the filter fixing part.
Wrap the welding ribs around the perimeter of the filter to
Swaging is welded and fixed in place.
If the fixed method is used, the ribs on the outermost circumference will rise, and
As shown in (a), (b), and (c) of FIG.
When the valve is sucked, the end of the valve
It will be stuck to the filter and it will not completely adhere to the filter,
The air bubbles on the surface of the turbine could not be completely removed. Therefore, the present invention solves such a problem.
Therefore, the filter is fixed with sufficient strength and the valve
Ink jet with improved adhesion to the filter
Recording device, its filter unit, and
Providing a method for fixing the filter to the filter unit
The purpose is to do so. [0007] To achieve the above object
In addition, the main configuration of the inkjet recording apparatus of the present invention,
The ink for supplying ink from the ink tank to the recording head.
The filter and the filter are
And a valve provided so that the filter can be worn.
The valve to the filter surface by means of contacting
And then push out the air bubbles adhering to the filter.
Of the ink jet recording apparatus which is designed to be removed
Install multiple fixing ribs on the filter fixing part of the ink supply path.
At least the outer periphery of the filter by the plurality of fixing ribs.
Fix the same side of the part to the filter fixing part
It was done. Of the plurality of fixing ribs, the filter
By the rib that fixes the outer circumference, it is fixed by other fixing ribs.
The outer surface of the filter and wrap it around the opposite side.
Fixing the filter more firmly by fixing it by inserting it
Is effective in At that time, as shown in FIG. 12 of the conventional example.
Fixed part does not rise as much as possible due to the outermost rib
To wrap it in and secure it to the valve filter.
It is preferable in order to improve the adhesion. The excitement
In order to make it less, crush the fixing part by this rib
It is more effective if it is flat. In the present invention, the valve has an elastic restoring force.
By using a flat plate-shaped member, fixing with fixing ribs
Elasticity caused by the gap between the filter and the filter surface
It compensates by deformation and improves adhesion with the filter.
be able to. In that case, the outer circumference of the valve should be
Outside of the filter.
A fixed rib that wraps the tip of the circumference is used to
By arranging a certain distance from the outer edge,
The amount of elastic deformation of the valve caused by the step with the constant rib can be controlled.
It is preferable to reduce the amount. Further, the filter unit of the present invention is
Ink for supplying ink from the ink tank to the printhead.
The filter and the ink tank of this filter
A filter and a valve that can be attached closely are placed on the side
By sucking ink from the nozzle side of the recording head,
Make sure that the valve is in close contact with the filter surface and that the filter ink
Push out bubbles adhering to the tank side to the recording head side
Be sure to remove air bubbles by removing the
The filter unit's filter
Providing multiple fixed ribs on the fixed part
At least the same side of the filter outer periphery as the fixed part
It is designed to be fixed. This multiple fixed rib
Is a liquid chamber on the ink tank side and a common liquid chamber on the printhead side.
It is better to provide in the communication part of. Also, this filter unit
The supply port was equipped with a supply path that guides the ink from the ink tank.
The supply path member can be connected. Furthermore, according to the invention
How to fix the filter to the filter unit is
Filter unit with multiple fixed ribs
ー By heat welding or ultrasonic welding on the same side of the outer periphery
It is done by fixing. In the present invention, bubbles adhered to the filter
Is set during the ejection recovery operation of the recording head except during normal printing.
Ink containing ink such as bubbles in the recording head and ink supply system
Dispose of in ink cartridges, etc.
When not feeding new ink to the recording head, etc.
In addition, the pump is operated to
Suction the valve and bring the valve into close contact with the filter surface.
Air bubbles on the ink tank side of the printer
Removed by pushing to the side. On the contrary,
During ink discharge operation during normal printing, the pump operation
To the recording head by capillary force without performing suction.
Is supplied to the recording head from the ink tank side.
The flow of ink to the card is gentle, and the valve is a filter.
Ink does not adhere to the
It is supplied from the gap to the recording head side. The present invention is a filter having such a function
At least on the same side of the filter periphery.
By fixing with the fixing rib,
It is more firmly fixed to the fixed part than the. Further, according to the present invention, the outermost rib is used.
On the surface opposite to the surface fixed by the multiple fixing ribs
And wrap it around the tip of the filter to secure it.
By using, the filter can be fixed more firmly.
it can. Further, the outermost rib provides a fixing portion.
By making it flat so that it does not rise only with the fixed part
The difference between the filter surface and the
In order to push out bubbles adhering to the surface to the recording head side,
The ink is sucked from the nozzle side of the recording head
When the filter is brought into close contact with the filter surface, its adhesion is improved.
To do. Further, a flat plate member having an elastic restoring force is used.
The configured valve is a valve that is created by sucking ink from the nozzle side.
When the filter and filter come into close contact, the fixed part and the filter
-The gap created by the step difference between the
Improves the adhesion with the supplementary filter and
When the ink is ejected at the time of writing,
Ink is returned between the filter and the plate.
To secure a sufficient gap. The smaller this step is, the less
The tighter the contact, the better the adhesion.
Part is located outside of that of the filter
In addition, the fixing
At a certain distance from the outer edge of the effective area of the filter.
It is preferable to arrange them. Embodiments of the present invention will be described with reference to the drawings.
First, an inkjet recording head as an example of the present invention
The schematic configuration of the part is based on FIG. 1 showing a schematic sectional view thereof.
I will explain. Inkjet recording head (hereinafter referred to as
The recording head 1) is connected to the ink tank 2 and
Ink jet cartridge IJC
Mounted on the carriage HC of the printer (see FIG. 8).
See). In this embodiment, the ink jet cartridge IJ
C is a type attachable to and detachable from the carriage HC.
The recording head 1 supplies the thermal energy used for ink ejection.
A plurality of electrothermal conversion elements that are generated and the
Board 11 on which a drive circuit for
Is provided corresponding to each of the plurality of electrothermal conversion elements.
The nozzle 8 and the base 11 and the top plate 10 are connected to each other.
Filter unit 15 and the filter unit
With the supply path member 7 connected to the ink tank side of the cartridge 15.
It is configured. The filter unit 15 includes an ink
Communication between the liquid chamber on the tank side and the common liquid chamber on the nozzle side
And a stainless steel filter 14 are formed.
Is installed on the stepped part of the communication part in the liquid chamber on the ink tank side.
It is fixed by the ribs that have been removed. Also filter
-The valve 101 has an ink
It is located on the link side and is in a normal state such as during normal printing.
And drifts in the ink in the liquid chamber. Then, the recording data thus constructed is
The head 1 uses the ink supply path 6 of the supply path member 7 for ink.
Connected to the ink supply port of the tank and arranged the nozzle 8
Mount the recording device so that the exit surface faces the recording medium 13.
Listed. The ink 4 supplied to the recording head 1 is stored
The ink tank 2 is an ink bag (or ink absorber)
3 and a container for inserting this ink bag, and seal it
It is configured with a lid member that stops. In this ink bag 3
Is filled with ink 4, and the
Ink is supplied to the next recording head 1 side. In addition,
The structure of the link is not limited to this.
Any material that can form an appropriate pressure state may be used.
Reference numeral 5 denotes an O-ring, which connects the supply path member 7 and the ink tank 2.
The space between them is sealed. The supply path member 7 is attached by an adhesive 9.
Top plate 1 made of a base plate made of aluminum
It is joined to 0. The ink 4 is supplied from the supply path 6 to the nozzle 8
The energy generated by the energy element.
It is ejected onto the recording medium 13. Next, the filter unit having the above structure is
Internal structure of the glove 15 and fixing of the filter to its fixing part
Each embodiment of the means will be described with reference to the drawings. [Embodiment 1] FIGS. 2A, 2B, 2C and 2D show the present invention.
Assembly of filters to the filter unit according to the first embodiment
It is sectional drawing for demonstrating the outline of standing up. 14 is
Filter, 15 is a filter unit, 15A is a filter
The first rib for welding the tar, 15B is the first rib 15A
The second rib for welding the filter located on the outer periphery, 101
Is a valve, 7 is a supply path member, and 40 is a welding head. Book
Procedure for assembling the filter unit in the embodiment
As shown in FIG. 2, (a) welding rib A and welding rib of the filter unit 15
Set the filter 14 on B. (B) By pressing the welding head 40, the welding rib A and the welding rib
Melt B and mix the filter 14 with the filter unit.
It is fixed to grate 15. (C) Set the filter valve 101 on the filter 14.
And cover the supply passage member 7 with the filter unit 15.
You. (D) The supply path member 7 and the filter unit 15 are supersonic.
The contact portions are welded and joined by wave welding. The filter 14 includes a welding rib A and a welding rib.
The double rib of B is welded to the filter unit 15
As it is firmly fixed, ultrasonic welding in the assembly process (d)
Of course, it does not come off due to vibration when wearing, figure
Than those fixed with a single rib, shown at 9,10
Can be firmly fixed. Also shown in FIGS.
And wrap it around the filter
Even if not, you can fix the same surface of the filter with double ribs.
It can be firmly fixed by and. Further, the welding head 40 in the assembly step (b)
The pressing surface of is the outermost circumference as shown in Figs.
The ribs of the filter 14 are flat without swelling, and the filter 14
Is fixed to the filter unit 15 in its flat shape
Therefore, the adhesion with the valve 101 is good, and the filter 14
It is possible to efficiently remove the air bubbles adhered on the top. The operation of the valve in this embodiment is shown in FIG.
Shown in (b) and (c). In FIG. 3, (a) air bubbles are attached to the filter 14,
If left as it is, the flow path resistance will increase and the ink will not flow properly.
I can't print. (B) Suction ink from the head side,
The flow causes valve 101 to come into close contact with filter 14 and push bubbles.
put out. (C) As a result, it adhered to the surface of the filter 14.
Bubbles are removed, ink flows smoothly, and clean marks
I can make letters. In this embodiment, as shown in FIGS.
Since there is no level difference in ribs,
Good adhesion to -14. [Embodiment 2] FIGS. 4A, 4B and 4C.
(D) to the filter unit according to the second embodiment of the present invention
Cross-sectional view for explaining the outline of the assembly of the filter of
Is. 14 is a filter, 15 is a filter unit
15A is the first rib for welding the filter, 15B is
For welding the filter located on the outer periphery of the first rib 15A
The second rib, 15C is the first rib 15A and the second rib 1
The third of the filter welding located on the outer periphery of 5B
Ribs, 101 is a valve, 7 is a supply channel member, and 40 is a welding blade.
It is dead. In this embodiment, the filter unit is
The procedure for assembling is as shown in FIG.
Set the filter 14 on B. (B) By pressing the welding head 40, the welding rib A and the welding rib
Melt B and mix the filter 14 with the filter unit.
It is fixed to grate 15. At the same time, welding by swaging
Melt as if C is pushed inward, and filter 1
Wrap the outer circumference of 4. (C) Set the filter valve 101 on the filter 14.
And cover the supply passage member 7 with the filter unit 15.
You. (D) The supply path member 7 and the filter unit 15 are supersonic.
The contact portions are welded and joined by wave welding. The filter 14 includes a welding rib A and a welding rib.
It is welded by the double rib of B to prevent the dust from coming off.
And then swaging the welding ribs to filter
Wrap the outer periphery of the
Vibration during the ultrasonic welding of the assembly process (f)
Of course, it does not come off even if it is moved,
And the filter shown in FIGS.
-Although the outer circumference of the wrapping is wrapped and fixed,
The same surface is fixed with double ribs of welding ribs A and B.
Not more firmly fixed than those shown in Figures 11 and 12.
Wear. In this embodiment, the assembling step (b)
Wrap the outer periphery of the filter with a filter unit 1
When fixed to 5, the maximum
If the ribs on the outer circumference are largely raised,
The step becomes large and the adhesion with the valve 101 is impaired.
Weld so that this rise is minimized
Wrap the outer circumference of the filter by swaging the ribs
Therefore, it is preferable to fix it to the filter unit 15.
No. In addition, at that time, the valve is a flat plate member having elastic restoring force.
If comprised, the adhesiveness can be improved more. The operation of the valve in this embodiment is shown in FIG.
(B) and (c) are shown. In FIG. 5, (a) there are air bubbles attached to the filter 14.
If left as it is, the flow path resistance will increase and the ink will not flow properly.
I can't print. (B) Ink suction from the head side in the suction recovery process
However, the valve 101 is elastically deformed by the flow of ink at this time,
It adheres to the filter 14 and pushes out air bubbles. (C) As a result, air bubbles on the surface of the filter 14 are removed.
Ink flows smoothly, and clear printing is possible. Especially in the normal printing state, the valve 101 is
Due to its elasticity, it returns to a flat plate shape, sufficient for ink supply.
Has a function to secure a gap between the filter 14 and
You. In addition, the adhesion of the valve 101 to the filter 14
To further raise the innermost rib A and outermost rib C
It is desirable to provide a certain distance, but this action
This will be described with reference to FIG. 6 (b1) and (b2) are shown in FIG.
How to escape bubbles in the process of removing bubbles in (b) will be described.
In (b1), the ribs 15A on the innermost circumference and the ribs on the outermost circumference are
The valve 15C has a fixed distance to reduce the elastic deformation of the valve.
Since there is a separation, is it the effective range of the filter (A1)?
The distance (C1) from the rib 15C crushed by welding
Is maintained, and the contact area of the valve 101 with the filter 14 is increased.
In addition, bubbles can be removed efficiently. In (b2)
The rib A and the outermost rib C are close to each other.
Between the effective range (A2) of the Luther and the rib 15C
Only Kana distance (C2) is secured, so flight 101
The adhesion area of the filter to the filter 14 is not so large,
In the figure, bubbles remain as indicated by the arrow. this thing
From the innermost rib A to the outermost rib C as described above.
It is desirable to provide a certain fixed distance. [Embodiment 3] FIGS. 7A, 7B and 7C.
(D) (e) (f) are filters according to the third embodiment of the present invention
-Outline the assembly of the filter to the unit
FIG. In the reference numerals, the same numerals as in FIG.
The numbers mean the same parts. Furthermore, 40 is for rib welding
Head, 41 is swaging head, 42 is rib crush
This is a flat finishing head. In this embodiment, the filter unit is
As shown in FIG. 7, the procedure for assembling is as follows.
Set the filter 14 on top. (B) The contact portion with the rib presses the flat welding head 40
Then, the welding rib A and the welding rib B are melted, and the filter
-14 is fixed to the filter unit 15. (C) The welding head 41 having a tapered contact portion with the rib is used.
Press to melt the ribs C so that they fall inward.
Wrap the outer periphery of the filter 14. (D) The contact portion with the rib is flat and the welding rib A and the welding rib
Press the welding head 42 in contact with all of B and the welding rib C.
Press to further flatten the rib C crushed in the assembly process (c).
In addition, the step with the filter 14 is reduced. (E) Set the filter valve 101 on the filter 14.
And cover the supply passage member 7 with the filter unit 15.
You. (F) The supply path member 7 and the filter unit 15 are supersonic
The contact portions are welded and joined by wave welding. The filter 14 has a welding rib A and a welding rib.
It is welded by the double rib of B to prevent the dust from coming off.
And wrap the outer circumference of the filter with welding rib C.
And is firmly fixed to the filter unit 15.
Then, even if it is vibrated during the ultrasonic welding in the assembly step (f), it will come off.
Of course, there is no such thing as a slave with only a single fixing rib.
Outside the filter shown in FIGS.
Even though the circumference was wrapped and fixed, the same as in this example
One side is not fixed with double ribs of welding ribs A and B
Fixed more firmly than the conventional example shown in FIGS.
it can. In addition, the welding head 42 is pushed in the assembly process (d).
Due to the pressure, the welded rib C is flattened, so
The step with the filter 14 can also be made smaller. As described above, in this embodiment, the welding
The head is divided into three parts, and the rib welding head 40: the welding rib A and the welding rib B are filled.
It is welded to the machine to ensure sealing performance. Swaging head 41: Filter with welding rib C
Securely fix it by swaging that wraps the outer circumference of. Flat finishing head 42: flatten the rib C,
Reduce the step. The effect of reducing this step is the same as in the second embodiment.
5A, 5B, and 5C are described in the same manner as in FIGS.
In the process of removing air bubbles, (b) ink is sucked from the head side,
The stool 101 adheres to the filter 14 and pushes air bubbles.
Start. At this time, the welded rib C is flattened.
Therefore, the step with the filter 14 is small,
The filter 14 and the valve 101 have good adhesion.
It is possible to efficiently remove the air bubbles attached to the
You. (C) As a result, the bubbles on the surface of the filter 14 are further
Efficiently removed, ink flows smoothly, clean
Can be printed. Next, the ink jet recording head of the present invention
FIG. 8 shows a schematic configuration of an inkjet recording apparatus equipped with
It will be described based on the following. In the figure, the carriage HC
Is the driving force transmission linked to the forward / reverse rotation of the drive motor 5013.
Leadscrew that rotates via reaching gears 5011 and 5009
The cap that engages with the spiral groove 5004 of the Liu 5005.
The ridge HC has pins (not shown) and reciprocates in the main scanning direction.
Be moved. Inkjet head 1 and ink tank 2
Is mounted on the carriage HC. Ink tank here
C2 is not necessarily mounted on the carriage HC
It is often fixed on the inkjet device IJRA,
Supply ink 3 to the inkjet head 1
No. Reference numeral 5002 denotes a paper pressing plate, which is a method of moving the carriage.
The recording medium (hereinafter referred to as paper)
Press on 5000. 5007 and 5008 are
It is a photo coupler and a lever 5006 of the carriage.
Check the existence in the area of
With home position detection means for performing replacements, etc.
is there. 5016 is a cap that caps the front surface of the recording head.
The member 5015 for supporting the stopper member 5022 is a cap member 5022.
A suction means for sucking the inside of the cap, and an opening 502 in the cap.
The suction recovery of the recording head is performed via 3. 5017
Is a cleaning blade, and 5019 is in front of this blade.
The main body support plate 501, which is a member that is movable in the backward direction.
These are supported by 8. The blade is in this form
Well known cleaning blade can be applied to this example.
Needless to say. Also, 5012 is a suction recovery
Lever to start pulling and engage with carriage
Drive cam 5020 that moves with the movement of the drive motor.
The driving force is transmitted by a known transmission means such as clutch switching.
Motion controlled. Reciprocating movement of the above-mentioned carriage HC (skip
Ink can be ejected from the recording head 1 in synchronism with
With, it is possible to record one line on the recording medium.
You. That is, the recording head 1 has a fine liquid ejection port.
(Orifice), liquid passage and part of this liquid passage
And the liquid (in
Energy to generate energy
Equipped with generating means. The energy generated by this means
The ink droplet is ejected from the orifice by utilizing the above. This
As an energy generation means to generate energy like
Is one that uses an electromechanical transducer such as a piezo element.
Irradiate electromagnetic waves from a user to generate heat,
That discharges droplets by the action of
It does not overheat the liquid with the electrothermal conversion element
There is a throat. Among them, heat is used to eject liquid
The recording head of this type has a high density of the liquid ejection ports.
High resolution recording to be able to array
Is possible. Among them, the electrothermal conversion element emits energy
The recording head used as a raw means can be easily made compact
And the recent technological advances and trust in the semiconductor field.
Advantages of IC technology and microfabrication technology with remarkable improvement in reliability
Can be fully utilized, high-density mounting is easy, and
It is also advantageous because it is cheap. According to the present invention, the outer peripheral portion of the filter is the same.
One side is fixed with multiple ribs provided on the filter fixing part.
Since it is fixed, it is fixed compared to the conventional single rib type
It can be firmly fixed to the part, and the filter outer peripheral fixed part
It is possible to prevent clogging of the recording head due to peeling of the print head.
it can. Outermost circumference of the filter among these fixed ribs
The surface fixed by other fixing ribs by the ribs that fix the
Wrap the outer peripheral tip of the filter over the surface opposite to
By adopting a configuration in which
The filter can be fixed. Further, the fill by the outermost fixed rib is provided.
Fixed part on the side of the contact surface with the valve that encloses the outer peripheral tip of the target
Is to be flat so that it does not rise as much as possible
Therefore, the step between the fixed part and the filter surface is reduced,
Push the bubbles adhering to the ink tank side to the recording head side.
Ink from the nozzle side of the recording head
When the valve is brought into close contact with the filter surface by pulling,
It is possible to improve its adhesion and increase the efficiency of removing bubbles.
it can. Further, the valve is a flat plate portion having an elastic restoring force.
Suction of ink from the nozzle side by using a material
When the valve and filter come into close contact with each other,
Elastic deformation of the gap caused by the step with the filter surface
To improve the adhesiveness with the supplement filter.
In addition, when the ink is ejected during normal printing, its elastic restoring force
Better restore it to a flat plate, and put it between the filter
It is possible to secure a sufficient gap for ink supply. Soshi
The outer circumference of the valve is outside the filter.
And wrap around the tip of the filter.
Fix the fixing rib to be inserted from the outer edge of the effective area of the filter
The adhesion is further enhanced by arranging them at a distance of
Can be improved. Furthermore, the above-mentioned fixing rib is used as a filter.
-By adopting the configuration provided in the fixed part of the unit
Using a welding method such as heat welding or ultrasonic welding.
The luther can be easily fixed to the fixed part.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic cross-sectional view for explaining a schematic configuration of an inkjet recording head according to the present invention. FIGS. 2 (a), (b), (c), and (d) of the present invention. Sectional drawing for explaining the outline of the assembly of the filter unit in the first embodiment. [FIG. 3] (a) (b) [c] Cross sectional view for explaining the effect of the valve in the first embodiment [FIG. 4] (a) ) (B) (c) (d) Sectional views for explaining the outline of the assembly of the filter unit in the second embodiment of the present invention. [FIG. 5] (a) (b) (c) Effect of the valve in the second embodiment [FIG. 6] (b1) (b2) A sectional view for explaining the effect of the valve in the second embodiment [FIG. 7] (a) (b) (c) (d) (e) (F) A step for explaining the outline of the assembly of the filter unit in the third embodiment of the present invention. FIG. 8 is a perspective view for explaining a schematic configuration of an inkjet recording apparatus according to the present invention. FIG. 9 is a view for explaining an outline of assembly of a (a), (b), (c), and (d) filter unit. [Fig. 10] Fig. 10 is a cross-sectional view in which the filter is partially peeled off at the end. [Fig. 11] (a) (b) (c) (d) Cross-sectional view for explaining the outline of the assembly of the filter unit. FIG. 12 (a) (b) (c) A sectional view in which the valve does not function properly due to poor adhesion to the filter [Explanation of reference numerals] 7 supply path member 14 filter 15 filter unit 15A filter welding first rib 15B filter Welding second rib 15C Filter welding third rib 40, 41, 42 Rib welding head 101 Valve

Claims (1)

Claim: What is claimed is: 1. A filter and a valve provided so as to be in close contact with the filter are arranged in an ink supply path for supplying ink from an ink tank to a recording head, and the valve is provided as described above. An ink jet recording apparatus in which the valve is brought into close contact with the filter surface by means of making close contact with the filter so as to extrude and remove bubbles adhering to the filter, wherein the ink supply path for fixing the outer peripheral portion of the filter An ink jet recording apparatus, wherein a plurality of fixing ribs are provided on the filter fixing portion, and at least the same surface side of the filter outer peripheral portion is fixed to the filter fixing portion by the plurality of fixing ribs. 2. The outer peripheral tip of the filter is wrapped and fixed by a rib that fixes the outermost periphery of the filter among the plurality of fixing ribs to the surface opposite to the surface fixed by the other fixing rib. The inkjet recording device according to claim 1. 3. The fixing portion on the side of the contact surface with the valve by the fixing rib on the outermost periphery is made flat.
The inkjet recording device according to item 1. 4. The ink jet recording apparatus according to claim 1, wherein the valve is formed of a flat plate member having an elastic restoring force. 5. The ink jet recording apparatus according to claim 1, wherein the outer peripheral portion of the valve is arranged outside the filter. 6. A fixing rib for wrapping the outer peripheral tip of the filter is arranged at a predetermined distance from the outer edge of the effective area of the filter so that the amount of elastic deformation of the valve caused by the step with the fixing rib is reduced. The inkjet recording apparatus according to claim 4, wherein the inkjet recording apparatus is an inkjet recording apparatus. 7. An ink supply path for supplying ink from an ink tank to a recording head, a filter arranged for removing dust and the like in the ink in the ink supply path, and an ink tank side ink supply of the filter. A valve provided so as to be in close contact with the filter is provided in the path, and ink is sucked from the nozzle side of the recording head to bring the valve into close contact with the filter surface and record bubbles adhering to the ink tank side surface of the filter. A filter unit of an ink jet recording apparatus, which is configured to remove air bubbles by pushing it toward the head side, wherein a plurality of fixing ribs are provided in a filter fixing portion of the filter unit for fixing an outer peripheral portion of the filter, and the plurality of fixing ribs are provided. At least the same surface side of the outer peripheral portion of the filter is fixed to the fixing portion with a fixing rib. Filter unit of the ink jet recording apparatus characterized and. 8. A filter for an ink jet recording apparatus according to claim 7, wherein a plurality of fixing ribs are provided in a communicating portion between the liquid chamber on the ink tank side and the common liquid chamber on the recording head side. unit. 9. The ink tank side of the filter unit,
The filter unit for an inkjet recording apparatus according to claim 7, wherein a supply path member 7 having a supply path for guiding the ink from the ink tank is connected. 10. A filter fixing portion of a filter unit is provided with a plurality of fixing ribs, and the plurality of fixing ribs fix at least the same surface side of the filter outer peripheral portion by heat welding or ultrasonic welding to fix the filter to the fixing portion. A method for fixing a filter to a filter unit, which is characterized in that the filter is fixed to.