KR101746627B1 - Metal filter and method of manufacturing the metal filter and squeezer used by the same - Google Patents

Metal filter and method of manufacturing the metal filter and squeezer used by the same Download PDF

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Publication number
KR101746627B1
KR101746627B1 KR1020150123361A KR20150123361A KR101746627B1 KR 101746627 B1 KR101746627 B1 KR 101746627B1 KR 1020150123361 A KR1020150123361 A KR 1020150123361A KR 20150123361 A KR20150123361 A KR 20150123361A KR 101746627 B1 KR101746627 B1 KR 101746627B1
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KR
South Korea
Prior art keywords
metal filter
wire
spindle
fine wire
frame
Prior art date
Application number
KR1020150123361A
Other languages
Korean (ko)
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KR20170027001A (en
Inventor
전광수
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전광수
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Application filed by 전광수 filed Critical 전광수
Priority to KR1020150123361A priority Critical patent/KR101746627B1/en
Publication of KR20170027001A publication Critical patent/KR20170027001A/en
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Publication of KR101746627B1 publication Critical patent/KR101746627B1/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D39/00—Filtering material for liquid or gaseous fluids
    • B01D39/14—Other self-supporting filtering material ; Other filtering material
    • B01D39/20—Other self-supporting filtering material ; Other filtering material of inorganic material, e.g. asbestos paper, metallic filtering material of non-woven wires
    • B01D39/2027—Metallic material
    • B01D39/2031—Metallic material the material being particulate
    • B01D39/2034—Metallic material the material being particulate sintered or bonded by inorganic agents
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D35/00—Filtering devices having features not specifically covered by groups B01D24/00 - B01D33/00, or for applications not specifically covered by groups B01D24/00 - B01D33/00; Auxiliary devices for filtration; Filter housing constructions
    • B01D35/02—Filters adapted for location in special places, e.g. pipe-lines, pumps, stop-cocks
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F11/00—Treatment of sludge; Devices therefor
    • C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
    • C02F11/121—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering
    • C02F11/125—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering using screw filters
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2239/00—Aspects relating to filtering material for liquid or gaseous fluids
    • B01D2239/10—Filtering material manufacturing
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2303/00—Specific treatment goals
    • C02F2303/06—Sludge reduction, e.g. by lysis

Abstract

The present invention relates to a metal filter formed by brazing and bonding fine wire to an outer peripheral surface of a sintered molded frame, a method for manufacturing the same, and a press filter using the same.
The metal filter according to the present invention is characterized in that a plurality of microfine wires (14) closely arranged on the outer circumferential surface of a frame (12) sintered in the form of a metal powder are brazed and each microfine wire (14) And is spirally arranged from the upper end to the lower end.

Description

FIELD OF THE INVENTION [0001] The present invention relates to a metal filter, a method of manufacturing the same, and a press filter using the metal filter.

The present invention relates to a metal filter obtained by spirally brazing a very fine wire to the outer circumferential surface of a cylindrical frame formed by sintering, a method for manufacturing the metal filter, and a press filter using the metal filter.

Korean Patent No. 10-0614420 (registered on Aug. 14, 2006) discloses a "metal filter ".

Wherein the metal filter comprises a sintered porous support having a microfiltration layer and a sintered porous support having a microfiltration layer formed by laminating and integrating the microfiltration layer to maintain the shape, wherein an average pore diameter of the microfiltration layer is defined as an average pore diameter And the filtration surface of the microfiltration layer is defined as a relief surface having an area ratio S1 / S0 of not less than 1.3 between the actual filtration area S1 and the reference filtration area S0 when the microfiltration layer is not formed as unevenness, And the average thickness of the fine filtration layer in the valley portion of the concavities and convexities is made thicker than the average thickness of the convexo-concavo-convex portion, and the relief surface is formed in a smooth curved surface

However, when the metal filter is bent in a cylindrical shape, the elongation is different, and folding or unevenness may occur, the joint portion may be broken, sludge may adhere to the filtration surface, and the pores may be clogged by the sludge.

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide a method of manufacturing a sintered cylindrical frame, in which a microfine wire is spirally brazed to the outer circumferential surface of a sintered compacted cylindrical frame to cause filtration gaps formed between fine wires and fine wires in the metal filter to substantially filter the sludge, A filter gap formed between the wires is not clogged so that it is not necessary to clean the metal filter, and a semi-permanently usable metal filter and a method for manufacturing the same are provided.

Another object of the present invention is to provide a compressor in which a metal filter is not clogged and does not need to be cleaned when filtering food wastes, wastewater, livestock manure or the like.

According to an aspect of the present invention, there is provided a metal filter comprising: a plurality of microfine wires arranged closely to an outer circumferential surface of a frame formed by sintering metal powder into a cylindrical shape; And are arranged in a spiral manner.

Wherein the metal powder is a stainless steel powder and the frame is formed by sintering a metal powder and has a pore size of about 1 mm and the fine wire has a diameter of 0.1 mm to 0.5 mm, Is 0.005 mm to 0.05 mm, and is arranged on the outer peripheral surface of the frame in a 45 ° helical form.

The method for manufacturing a metal filter according to the present invention

(1) sintering and molding a metal powder to form a cylindrical frame,

(2) winding the superfine wire on the outer circumferential surface of the jig roller and winding the superfine wire on the adhesive film,

(3) a step of cutting the superfine wire wound around the outer circumferential surface of the jig roller and the adhesive film to a lower end of the jig roller at an angle of 45 [deg.] From one of the upper ends of the jig roller,

(4) separating and developing the adhesive film having the superfine wire from the jig roller,

(4) winding the adhesive film on the outer peripheral surface of the frame so that the cut surface of the adhesive film to which the superfine wire is adhered is aligned with the circumference of the frame top,

(5) brazing the extra fine wire to the outer peripheral surface of the frame,

(6) a step of melting the plating on the surface of the fine wire so that a filtration gap is formed between the fine wire and the fine wire.

The fine-grained wire is wound so as to adhere to the fine-grained wire wound around the fine-grained wire wound around the jig roller in a state of being plated on the surface thereof, and the gap of filtration between the superfine wire and the superfine wire is determined according to the thickness of the plated surface of the fine- .

In the step of winding the adhesive film adhered with the superfine wire to the outer peripheral surface of the frame so that the cut surface of the adhesive film with the superfine wire adhered to the circumference of the frame top is kept in contact with the outer peripheral surface of the frame , A tungsten wire is wound on the adhesive film (18), and the tungsten wire is removed when the brazing joint is completed.

A squeeze filter using a metal filter according to the present invention is characterized in that a metal filter having a micro-fine wire brazed in a 45 ° helical shape is disposed on the outer circumferential surface of a sintered molded frame, and a spindle cylinder is interposed between the support housing and the metal filter A motor is mounted on the upper plate of the support housing in an inverted state, the drive shaft of the motor is connected to the upper plate center of the spindle cylinder, the spindle cylinder is rotated by the motor, and the inner peripheral surface of the spindle cylinder is made of a synthetic resin material The spiral screw member is joined, the screw member is brought into close contact with the outer peripheral surface of the metal filter, the raw water supply pipe is mounted on the metal filter so as to penetrate the metal filter, and the vacuum pump is connected to the lower disk of the metal filter through the discharge pipe, A vacuum is applied to the inside of the metal filter by the motor, and while the spindle is rotated by the motor The raw water of the storage tank is supplied to the gap formed between the upper plate of the metal filter and the upper plate of the spindle through the raw water supply pipe and the screw member of the spindle cylinder pushes the raw water supplied through the gap downward, The filter is used to filter the filtered water from the raw water, and the sludge accumulated on the micro-fine wire of the metal filter arranged in the 45 ° helical form is swept downward by the screw member.

The bearing housing has a cylindrical portion, a top plate attached to the top of the cylindrical portion by a bolt, a hole formed at the center of the top plate, a driving shaft of a motor mounted on the top plate is connected to the center of the top plate of the spindle through a hole, And a bearing is mounted on the upper surface of the flange disk, and the bearing is disposed between the cylindrical portion and the cylindrical portion of the spindle cylinder.

The open / close sheet is made of a urethane material. When the vacuum pump is operated, the lower end of the metal filter and the lower end of the spindle cylinder are closed to block external air from flowing between the metal filter and the spindle cylinder, and the sludge is fixed The opposite side of the bolt is pushed downward, and the sludge is discharged. When the sludge pressure is removed, the bolt is returned to its original position by the elastic force of the urethane material.

Accordingly, the metal filter according to the present invention, the method of manufacturing the same, and the squeeze filter using the filter filter, the filtration gap formed between the fine wires and the fine wires in the metal filter substantially filters the sludge, Since the filtration gap is not blocked, it is not necessary to clean the metal filter, and it can be used semi-permanently, and the filtration cost can be reduced.

1 is a perspective view showing a metal filter according to the present invention;
Fig. 2 is a schematic view showing a process of manufacturing a metal filter according to the present invention.
3 is a cross-sectional view of a compressor using a metal filter according to the present invention
4 is a cross-sectional view of the spindle cylinder

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings.

Referring to FIG. 1, a metal filter 10 according to the present invention includes a plurality of microfine wires 14 that are closely arranged on the outer circumferential surface of a frame 12 formed by sintering metal powder into a cylindrical shape, The wires 14 are arranged spirally from the top of the frame 12 to the bottom.

The metal powder is stainless powder, and the frame 12 is formed by sintering a metal powder and has pores of about 1 mm in size.

The microfine wire 14 has a diameter of 0.1 mm to 0.5 mm and a filtration gap between the microfine wires 14 is 0.005 mm to 0.05 mm and is arranged in a 45 ° helical shape on the outer peripheral surface of the frame 12.

Thus, the metal filter 10 according to the present invention allows the filtration gap between the extra fine wire 14 and the extra fine wire 14 to substantially filter the sludge and the like, And the extra fine wire 14, the pores are not clogged by the fine sludge particles contained in the filtered water.

A method of manufacturing a metal filter according to the present invention will now be described with reference to FIG.

(1) As shown in (a) of FIG. 2, the cylindrical frame 12 is sintered and formed into a metal powder.

(2) As shown in (b) of FIG. 2, the fine wire 14 is wound around the outer circumferential surface of the jig roller 16, and the adhesive film 18 is wound around the fine wire 14. Here, the superfine wire 14 is plated on its surface, and the superfine wire wound around the jig roller 16 is wound so as to adhere closely to the superfine wire.

(3) As shown in (c) of FIG. 2, the fine wire 14 and the adhesive film 18 wound on the outer circumferential surface of the jig roller 16 are rotated at 45 ° from any one point of the upper end of the jig roller 16 16).

(4) As shown in FIG. 2 (D), the adhesive film 18 with the superfine wire 14 is separated from the jig roller and developed. The developed adhesive film to which the fine wire 14 is adhered has a parallelogram shape.

(4) As shown in FIG. 2 (e), when the cut surface 18a of the adhesive film 18 to which the extra fine wire 14 is adhered is aligned with the circumference of the upper end of the frame 12, The adhesive film 18 is wound around the outer peripheral surface of the frame 12. At this time, a tungsten wire or the like is wound on the adhesive film 18 so that the extra fine wire 14 can be kept in close contact with the outer circumferential surface of the frame 12.

(5) The fine wire 14 is brazed to the outer peripheral surface of the frame 12, as shown in Fig. As a result, the extra fine wire 14 is arranged in a spiral shape on the outer peripheral surface of the frame 12. At this time, when the brazing joint is completed, remove the tungsten wire.

(6) Then, by melting the plating on the surface of the fine wire (14), a filtration gap is formed between the fine wire (14) and the fine wire (14). At this time, the filtration gap between the extra fine wire 14 and the extra fine wire 14 is determined according to the thickness of the plated surface of the extra fine wire 14. Generally, the filtration gap between the extra fine wire 14 and the extra fine wire 14 is 0.005 to 0.05 mm.

In the metal filter according to the present invention constructed and manufactured as described above, the size of pores formed in the frame is determined according to the particle size of the metal powder, and the microfine wire Food or food wastes, wastewater, livestock manure, etc. in accordance with the filtration gap of the filter 14.

An example in which the metal filter constructed and manufactured as described above is applied to the squeeze filter will be described with reference to Fig.

3, the squeeze filter according to the present invention includes a metal filter 10 having a micro-fine wire 14 (see FIG. 1) brazed in a 45 ° helical form on the outer peripheral surface of a sintered molded frame 12 (see FIG. 1) A spindle cylinder 30 is rotatably disposed between the support housing 20 and the metal filter 10 and a motor (not shown) is mounted on the upper plate 23 of the support housing 20, The driving shaft 42 of the motor 40 is connected to the center of the upper plate 32 of the spindle cylinder 30 so that the spindle cylinder 30 is rotated by the motor 40, A spiral screw member 33 made of a synthetic resin material is bonded to the inner peripheral surface of the spindle cylinder 30 and the screw member 33 is brought into close contact with the outer circumferential surface of the metal filter 10 and the metal filter 10 And a vacuum pump 80 is connected to the lower disk 120 of the metal filter 10 through a discharge pipe 85 Vacuum pressure is applied to the inside of the metal filter 10 by the vacuum pump 80 and the raw water of the storage tank 90 is supplied to the raw water supply pipe (not shown) while the spindle 30 is rotated by the motor 40 50 to the gap formed between the upper disk 110 of the metal filter 10 and the upper plate 32 of the spindle 30 and the screw member 33 of the spindle cylinder 30 is inserted into the clearance the filtered water is filtered in the raw water by the metal filter 10 and accumulated in the microfine wire 14 of the metal filter 10 arranged in the 45 ° helical form in the process of pushing down the raw water supplied through the gaps And the sludge is swept downward by the screw member 33.

1, a filter bone 12 is formed by sintering and molding a stainless steel powder into a cylindrical shape, and a plurality of microfine wires (hereinafter, also referred to as " 14 are brazed, and each fine wire 14 is arranged spirally from the top of the frame 12 to the bottom.

The upper and lower plates 110 and 120 are attached to the upper and lower ends of the metal filter 10. The center of the lower plate 120 and the center of the upper plate 110 are connected to a raw water supply pipe 50 The raw water supply pipe 50 is passed through the metal filter 10 and one end of the discharge pipe 85 is connected to the lower circular plate 120 and the vacuum pump 80 ).

The support housing 20 has an upper plate 23 coupled to the upper end of the cylindrical portion 21 by a bolt 25 and a hole 23a formed at the center of the upper plate 23, The drive shaft 42 of the motor 40 is connected to the center of the upper plate 32 of the spindle cylinder 30 through the hole 23a and a flange disk 27 in the form of a ring is mounted on the lower end of the cylindrical portion 21 The bearing 60 is mounted on the upper surface of the flange disc 27 and the bearing 60 is disposed between the cylindrical portion 21 and the cylindrical portion 31 of the spindle 30.

3 and 4, an upper plate 32 is coupled to the upper end of the cylindrical portion 31 of the spindle cylinder 30 and a spiral screw member 33 made of synthetic resin is attached to the inner peripheral surface of the cylindrical portion 31 The cylindrical portion 31 is tapered so that the diameter d1 of the cylindrical portion 31 decreases from the upper end to the lower end and the thread height h1 of the screw member 33 decreases from the upper portion to the lower portion And a bearing mounting groove 35 is formed at a side end of the covering portion 34 and a ring shape is formed on the lower surface of the covering portion 34 Closing sheet 70 is attached by the bolts 71 so that the opening and closing sheet 70 closes the space between the cylindrical portion 31 and the lower original plate 120 of the metal filter 10, And is opened by the discharge pressure of the sludge.

The cylindrical portion 31 has a taper angle a1 of 2.5 degrees.

The opening and closing sheet 70 is made of a urethane material and blocks the gap between the lower end of the metal filter 10 and the lower end of the spindle 30 when the vacuum pump 80 operates, The sludge is discharged while the opposite side of the bolt 71 is lowered, the sludge is discharged, and when the sludge pressure is removed And is returned to the original position by the elastic force of the urethane material.

Here, a triangular pit 75 is formed on the opening / closing sheet 70 so that the sludge can be stably discharged by the triangular pit 75 and the airtightness of the opening / closing sheet 70 is stably maintained .

The raw water is transferred from the upper end of the outer circumferential surface of the metal filter 10 to the lower end by the screw member 33 and the filtered water is sucked by the suction pressure of the vacuum pump 80 through the metal filter 10 And the sludge is left on the outer circumferential surface of the metal filter 10. The sludge is prevented from accumulating on the outer circumferential surface of the metal filter 10 by the screw member 33 sweeping the sludge along the fine wire 14 of the metal filter 10 and the sludge is prevented from being accumulated between the fine wire 14 and the fine wire 14 The sludge does not clog the filtration gap of the sludge.

In the compression filter according to the present invention constructed as described above, a vacuum is applied to the interior of the metal filter 10 by the vacuum pump 80, and while the spindle 30 is rotated by the motor 40, Is supplied through the pipe 50 to the gap formed between the upper disk 110 of the metal filter 10 and the upper plate 32 of the spindle 30 and the screw member 33 of the spindle cylinder 30, The filtered water is filtered from the raw water by the metal filter 10 having the vacuum pressure applied thereto and the minute wire of the metal filter 10 arranged in a spiral manner The sludge accumulated on the filter 14 is swept downward by the screw member 33 so that the sludge is not accumulated on the outer circumferential surface of the metal filter 10.

Thus, the compression filter according to the present invention is mainly used for treatment of food wastes and animal wastes, and the metal filter is not clogged, so that it is not necessary to clean the metal filter, and the filter filter can be used semi-permanently, There is an advantage.

10: metal filter 12: frame
14: extra fine wire

Claims (9)

delete delete (1) sintering and molding a metal powder to form a filter bone (12)
(2) winding the fine wire (14) on the outer circumferential surface of the jig roller (16) and winding the adhesive film (18) on the fine wire (14)
(3) a step of cutting the fine wire 14 and the adhesive film 18 wound around the outer peripheral surface of the jig roller 16 to the lower end of the jig roller 16 at an angle of 45 [deg.] From any one point of the upper end of the jig roller 16,
(4) separating and developing the adhesive film (18) with the fine wire (14) from the jig roller,
(4) The adhesive film 18 to which the superfine wire 14 is adhered is attached to the frame 12 so that the cut surface 18a of the adhesive film 18 to which the superfine wire 14 is adhered is aligned with the circumference of the upper end of the frame 12. Winding on an outer circumferential surface,
(5) brazing the fine wire (14) to the outer peripheral surface of the frame (12)
(6) melting the plating on the surface of the fine wire (14) so that a filtration gap is formed between the fine wire (14) and the fine wire (14).
The method of claim 3,
The superfine wire 14 is wound so that the superfine wire wound around the superfine wire 14 wound around the jig roller 16 in a state of being plated on the surface is closely contacted with the superfine wire 14, Characterized in that a filtration gap between the wire (14) and the microfine wire (14) is determined.
The method of claim 3,
(4) The adhesive film 18 to which the superfine wire 14 is adhered is attached to the frame 12 so that the cut surface 18a of the adhesive film 18 to which the superfine wire 14 is adhered is aligned with the circumference of the upper end of the frame 12. Wherein a tungsten wire is wound on the adhesive film (18) so as to maintain a state in which the extra fine wire (14) is in close contact with the outer circumferential surface of the frame (12) Gt;
A metal filter 10 brazed with a microfine wire 14 in a 45 ° helical form is disposed on the outer circumferential surface of the sintered molded frame 12 in the interior of the receiving housing 20 and the receiving housing 20 and the metal filter The motor 40 is mounted on the upper plate 23 of the receiving housing 20 in an inverted state and the driving shaft 42 of the motor 40 is mounted on the spindle case 30, The spindle cylinder 30 is rotated by the motor 40 and the spiral screw member 33 made of synthetic resin is bonded to the inner peripheral surface of the spindle cylinder 30, The screw member 33 is in close contact with the outer circumferential surface of the metal filter 10 and the raw water supply pipe 50 is mounted on the metal filter 10 so as to pass through the metal filter 10 and the vacuum pump 80 is connected to the discharge pipe 85 The vacuum pressure is applied to the inside of the metal filter 10 by the vacuum pump 80, The raw water of the storage tank 90 is supplied to the upper disk 110 of the metal filter 10 and the spindle 30 through the raw water supply pipe 50 while the spindle 30 is rotated by the rotor 40. [ The metal filter 10 is supplied with a gap formed between the upper plate 32 and the screw member 33 of the spindle 30 to push down the raw water supplied through the gap. And the sludge accumulated on the fine wire (14) of the metal filter (10) arranged in 45 ° helical form is swept downward by the screw member (33) filter.
The method according to claim 6,
The support housing 20 has an upper plate 23 coupled to the upper end of the cylindrical portion 21 by a bolt 25 and a hole 23a formed at the center of the upper plate 23, The driving shaft 42 of the motor 40 is connected to the center of the upper plate 32 of the spindle cylinder 30 through the hole 23a and the first flange disk 27 in the form of a ring is fixed to the lower end of the cylindrical portion 21. [ And a bearing 60 is mounted on the upper surface of the flange disk 27. The bearing 60 is disposed between the cylindrical portion 21 and the cylindrical portion 31 of the spindle cylinder 30. [ A pressure filter using a metal filter.
The method according to claim 6,
The spindle cylinder 30 has an upper plate 32 coupled to the upper end of the cylindrical portion 31 and a spiral screw member 33 made of a synthetic resin material joined to the inner peripheral surface of the cylindrical portion 31, The cylindrical portion 31 is tapered so that the diameter d1 decreases from the upper end to the lower end and the thread height h1 of the screw member 33 decreases from the upper portion to the lower portion, A bearing mounting groove 35 is formed at the side end of the covering portion 34 and a ring opening and closing sheet 70 is fixed to the lower surface of the covering portion 34 by bolts Closing sheet 70 is closed between the cylindrical portion 31 and the lower original plate 120 of the metal filter 10 and the opening and closing sheet 70 is opened by the discharge pressure of the sludge,
The opening and closing sheet 70 is made of a urethane material and blocks the gap between the lower end of the metal filter 10 and the lower end of the spindle 30 when the vacuum pump 80 operates, The sludge is discharged while the opposite side of the bolt 71 is lowered, the sludge is discharged, and when the sludge pressure is removed And is returned to the original position by the elastic force of the urethane material.
9. The method of claim 8,
And a triangular pit (75) is formed on the opening / closing sheet (70).
KR1020150123361A 2015-09-01 2015-09-01 Metal filter and method of manufacturing the metal filter and squeezer used by the same KR101746627B1 (en)

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Application Number Priority Date Filing Date Title
KR1020150123361A KR101746627B1 (en) 2015-09-01 2015-09-01 Metal filter and method of manufacturing the metal filter and squeezer used by the same

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KR101746627B1 true KR101746627B1 (en) 2017-06-13

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KR102032992B1 (en) * 2017-12-19 2019-10-16 정수환 Rapidity filtration equipment using wire mesh screen hot pressure welding stainless disc filter module

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100614420B1 (en) * 1998-10-12 2006-08-21 니폰 세이센 가부시키가이샤 Metal filter
US20100146922A1 (en) * 2006-04-15 2010-06-17 Acs Industries, Inc. Wound Wire Filter Elements

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100614420B1 (en) * 1998-10-12 2006-08-21 니폰 세이센 가부시키가이샤 Metal filter
US20100146922A1 (en) * 2006-04-15 2010-06-17 Acs Industries, Inc. Wound Wire Filter Elements

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