JPS60244318A - Filter element and preparation thereof - Google Patents
Filter element and preparation thereofInfo
- Publication number
- JPS60244318A JPS60244318A JP10080084A JP10080084A JPS60244318A JP S60244318 A JPS60244318 A JP S60244318A JP 10080084 A JP10080084 A JP 10080084A JP 10080084 A JP10080084 A JP 10080084A JP S60244318 A JPS60244318 A JP S60244318A
- Authority
- JP
- Japan
- Prior art keywords
- filter medium
- filter element
- corrugated
- corrugations
- filter material
- 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.)
- Pending
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/52—Particle separators, e.g. dust precipitators, using filters embodying folded corrugated or wound sheet material
- B01D46/521—Particle separators, e.g. dust precipitators, using filters embodying folded corrugated or wound sheet material using folded, pleated material
- B01D46/525—Particle separators, e.g. dust precipitators, using filters embodying folded corrugated or wound sheet material using folded, pleated material which comprises flutes
- B01D46/527—Particle separators, e.g. dust precipitators, using filters embodying folded corrugated or wound sheet material using folded, pleated material which comprises flutes in wound arrangement
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Filtering Materials (AREA)
- Filtering Of Dispersed Particles In Gases (AREA)
Abstract
Description
【発明の詳細な説明】
第６図に示す如く長尺の平面状ろ材１とほぼ幅方向に稜
線２を有する長尺の波形ろ材３とを積層接着し、波形ろ
材３の一端の山部と他端の谷部とに充填材９，１０を充
填しまたは第７図に示す如く平面状ろ材１と波形ろ材３
とを積層接着し、波形ろ材３の波の一端を９ａに示す如
く押しつぶし波の他端の谷部に充填材１０を充填するこ
とにより波形ろ材３の一端の山部と他端の谷部とをシー
ルし、第β図に示す如く芯材１１の周りに捲付けまたほ
ろ材のみを撞いて円筒形に成形してなるフィルター素子
は既に１９５２年６月、１０日４発行のアメリカ合衆国
特許第２，５９９，６０４号に使い捨て用フィルターと
して開示されてい・る。DETAILED DESCRIPTION OF THE INVENTION As shown in FIG. 6, a long planar filter medium 1 and a long corrugated filter medium 3 having ridge lines 2 substantially in the width direction are laminated and bonded together, and the peaks at one end of the corrugated filter medium 3 are bonded together. Fillers 9 and 10 are filled in the troughs at the other end, or as shown in FIG.
The corrugated filter medium 3 is laminated and bonded, and one end of the wave of the corrugated filter medium 3 is crushed as shown in 9a, and the filler 10 is filled in the trough of the other end of the wave, thereby forming a peak at one end and a trough at the other end of the corrugated filter medium 3. A filter element formed by sealing and forming a cylindrical shape by wrapping it around a core material 11 and rolling only silica material as shown in Fig. β has already been disclosed in United States Patent No. , 599,604 as a disposable filter.
このフィルター素子は円筒の一端面より他端面に至る多
数の小径孔を有ししかもその小径孔の半数は一端面にお
いて他の半数は他端面においてシールされており、第９
図に示す如くその一端面より流入した流体１２は極めて
広いろ材１．３の全表面積を透過して外部に排出される
ためその占有容積に比し極めて大きいろ過能力を有する
ものであるが、フィルター素子の外周面輪郭６には第８
図に示す如く片波成形体の捲始め部４の段差がそのラジ
アル方向に相当する外周面４ａ部に残り且つ捲終り部５
に段差を生じ真円状に製作することができない。たとえ
ば自動車のエンジンに導入する外気中に含まれる微細な
座環をこのフィルター素子によりろ過除去する場合には
撞始め部の段差４および該段差４のラジアル方向に相当
する外周面にあ゛られれる段差４ａ並に撞終り部の段差
５より役人外気がフィルター素子を透過せず漏洩しエン
ジンに塵埃を吸入しエンジンに損傷を与える結果となる
。従って外周面輪郭６は真円状に成形することが必要で
ある。This filter element has a large number of small diameter holes extending from one end surface of the cylinder to the other end surface, and half of the small diameter holes are sealed at one end surface and the other half are sealed at the other end surface.
As shown in the figure, the fluid 12 flowing in from one end surface passes through the entire surface area of the filter medium 1.3, which is extremely wide, and is discharged to the outside, so it has an extremely large filtration capacity compared to the volume it occupies. The outer peripheral surface contour 6 of the element has an eighth
As shown in the figure, the step at the winding start part 4 of the single-wave molded body remains on the outer circumferential surface 4a corresponding to the radial direction, and the winding end part 5
It is not possible to manufacture a perfect circle because of the difference in level. For example, when using this filter element to filter out minute seat rings contained in outside air introduced into an automobile engine, the filter element is applied to the step 4 at the beginning of the stroke and the outer circumferential surface corresponding to the radial direction of the step 4. Outside air from the official does not pass through the filter element and leaks from the step 4a and the step 5 at the end of the stroke, causing dust to be sucked into the engine and causing damage to the engine. Therefore, it is necessary that the outer peripheral surface contour 6 be formed into a perfect circle.
本発明は上記の要請にこたえるものであって、実施例を
図面について説明すれば、本発明のフィルター素子は第
６図または第７図に示す如く平面状ろ材１とほぼ幅方向
に稜線２を有する波形ろ材３とを接着して片波成形体と
なし、波形ろ材３の一端の山部と他端の谷部とをシール
しこれを円筒状に積層成形するに当り第２図に示す如く
撞始め部４および捧終り部５における波形ろ材３の波高
を漸次低くし、これを第１図に示す如く円筒状に捲くこ
とにより捲始め部および円筒外周面に段差を生ぜず外周
面輪郭６が真円状になるよう形成したフィルター素子で
ある。The present invention satisfies the above-mentioned demands, and an embodiment thereof will be described with reference to the drawings. As shown in FIG. 6 or 7, the filter element of the present invention has a flat filter medium 1 and a ridge line 2 substantially in the width direction. The corrugated filter medium 3 and the corrugated filter medium 3 are adhered to form a single-wave molded body, the peaks at one end of the waveform filter medium 3 and the troughs at the other end are sealed, and this is laminated into a cylindrical shape as shown in Fig. 2. By gradually lowering the wave height of the corrugated filter medium 3 at the winding start part 4 and the winding end part 5 and rolling it into a cylindrical shape as shown in FIG. This is a filter element formed so that it has a perfect circular shape.
次に本発明のフィルター素子の製造法の実施例を図面に
ついて説明する。第３図はｍｌ工程を示すもので、図に
おいて７．８は所望の歯型を有する一対の型付ローラで
互に噛合い、一方の型付ローラ８は圧着ローラ１３と相
接し、両ローラの回速はほぼ同一とする。１４は接着剤
塗布装置で接着剤容器１４ａと接着剤塗布ローラ１４ｂ
とよりなり、接着剤容器１４ａには接着剤１５を入れる
。Next, an embodiment of the method for manufacturing a filter element of the present invention will be described with reference to the drawings. FIG. 3 shows the ml process. In the figure, 7.8 is a pair of molding rollers having a desired tooth profile, which are in mesh with each other. One of the molding rollers 8 is in contact with the pressure roller 13, and both The rotational speed of the rollers is approximately the same. 14 is an adhesive applicator, which includes an adhesive container 14a and an adhesive applicator roller 14b.
Therefore, the adhesive 15 is put into the adhesive container 14a.
接着剤塗布ローラ１４ｂはその上端を型付ローラ８に接
し、下方部を接着剤１５に浸漬して駆動または型付ロー
ラ８に従動せしめる。接着剤塗布ローラ１４ｂの一端た
とえば第３図の手前側においてろ紙の端縁数ｍｍ幅は接
着剤１５が塗布されないよう短くする。尚図中１６は充
填材９の容器、１７は充填材９を押出すための押出しノ
ズルである。The adhesive application roller 14b has its upper end in contact with the molding roller 8, and its lower part is dipped in the adhesive 15 to be driven or driven by the molding roller 8. At one end of the adhesive application roller 14b, for example on the near side in FIG. 3, the width of the edge of the filter paper is shortened by a few mm to prevent the adhesive 15 from being applied. In the figure, 16 is a container for the filler 9, and 17 is an extrusion nozzle for extruding the filler 9.
型付ローラ７．８においては型付ローラ８を駆動し、型
付ローラ７は型付ローラ８に従動せしめ両ローラ７．８
の噛合い部の間隙は周期的に増減せしめる。その方法と
しては周知の種々の機構を採用し得るが、たとえば第４
図に示す如くローラ７．８の両端において駆動ローラ８
の回転を歯車１８．１９，２０．２１の列により減速し
てカム２２に伝え、従動ローラ７と同軸の押圧輪２３を
バネ２４によりカム２２に押圧する方法を用いる。The forming roller 7.8 drives the forming roller 8, and the forming roller 7 is driven by the forming roller 8, and both rollers 7.8
The gap between the meshing parts increases and decreases periodically. Various well-known mechanisms can be adopted as the method, but for example, the fourth
Drive roller 8 at both ends of roller 7.8 as shown in the figure.
A method is used in which the rotation is decelerated by a row of gears 18, 19 and 20, 21 and transmitted to the cam 22, and a pressing ring 23 coaxial with the driven roller 7 is pressed against the cam 22 by a spring 24.
片波成形体の製造に当ってはｇＪ３図に示す如くロール
状に撞いた長尺のろ紙１．３ａを用意し、ろ紙３ａは型
付ローラ７．８の噛合い部に導き波形３に型付けした後
接着剤塗布装置１４により波形ろ紙３の波頂部にその一
端縁数ｍｍ幅を残して接着剤１５を塗布し、型付ローラ
８と圧着ローラ１３との間隙において平面状ろ紙ｌと接
着し、接着剤１５を塗布していない一端縁において両ろ
紙１．３間に充填材容器１６の押出しノズル１７により
充填材９を注入し平面状ろ紙ｌと波形ろ紙３との透孔の
端縁から数ｍｍ程度を完全に密封して一旦捲取る。ある
いは両ろ紙１．３の接着剤１５を塗布していない端縁部
に少量の接着剤を塗布し一対のローラで波形ろ紙３を平
面状ろ紙１に向けて押圧し、第７図に示すシール９ａを
形成してもよい。かくして第２図に示す如く波のピッチ
が一定で波の高さに高低があり透孔の一端を密閉した片
波成形体が得られる。To manufacture a single-wave molded product, prepare a long filter paper 1.3a rolled into a roll as shown in Fig. gJ3, and guide the filter paper 3a to the meshing part of the molding roller 7.8 and mold it into a waveform 3. After that, an adhesive 15 is applied to the wave crest of the corrugated filter paper 3 with a width of several mm left at one edge by the adhesive application device 14, and the adhesive 15 is bonded to the flat filter paper l in the gap between the molding roller 8 and the pressure roller 13. , filler 9 is injected between both filter papers 1.3 using the extrusion nozzle 17 of the filler container 16 at one edge where the adhesive 15 is not applied, and the filler 9 is injected from the edge of the through hole between the flat filter paper 1 and the corrugated filter paper 3. Completely seal around a few millimeters and then roll it up. Alternatively, apply a small amount of adhesive to the edges of both filter papers 1.3 that are not coated with adhesive 15, and use a pair of rollers to press the corrugated filter paper 3 toward the flat filter paper 1 to form a seal as shown in FIG. 9a may also be formed. In this way, as shown in FIG. 2, a single-wave molded body is obtained in which the pitch of the waves is constant, the height of the waves varies, and one end of the through hole is sealed.
第５図は第２工程を示すもので、図中２５は接着剤塗布
装置で接着剤容器２５ａと接着剤塗布ローラ２５ｂとよ
りなり必要に応じ押えローラ２５Ｃを設は接着剤容器２
５ａには接着剤１５を入れ接着剤塗布ローラ２５ｂの一
部を浸漬する。２６は充填材１０の容器、２７は充填材
１０を押出すための押出しノズルである。FIG. 5 shows the second step, in which reference numeral 25 denotes an adhesive applicator, which consists of an adhesive container 25a and an adhesive applicator roller 25b, and a presser roller 25C is installed as needed.
Adhesive 15 is put in 5a, and a part of adhesive application roller 25b is immersed therein. 26 is a container for the filler 10, and 27 is an extrusion nozzle for extruding the filler 10.
第１工程で一旦捲取った片波成形体は充填材９がほぼ乾
燥または硬化した後、第２図に示すフィルター素子１個
分の片波成形体を切取り、接着剤塗布装置２５により接
着剤１５を波形ろ紙３の波頂部に塗布し、つづいて充填
材容器２６の押出しノズル２７により第１工程でシール
９．９ａした端縁と反対側の端縁に充填材１０を注入し
、平面状ろ紙１と波形ろ紙３との接合部に形成される小
透孔の端縁から数ｍｍ程度を完全に密封して捲取る。充
填材９．１０および接着材１５を乾燥または硬化して第
１図に示すフィルター素子を得る。After the filler 9 of the single-wave molded body once rolled up in the first step is almost dry or hardened, the single-wave molded body for one filter element shown in FIG. 15 is applied to the wave crest of the corrugated filter paper 3, and then the filler 10 is injected using the extrusion nozzle 27 of the filler container 26 to the edge opposite to the edge sealed 9.9a in the first step. A few millimeters from the edge of the small through hole formed at the joint between the filter paper 1 and the corrugated filter paper 3 is completely sealed and rolled up. The filler material 9.10 and the adhesive material 15 are dried or cured to obtain the filter element shown in FIG.
本発明は以上の如（片波成形体の撞始め部および撞終り
部における波形ろ材３の波高を漸次低くすることにより
、該片波成形体を撞いて円筒形のフィルター素子を成形
した場合その撞始め部および撞終り部に生ずる段差をな
くし、円筒形の外周面輪郭を真円状に形成したので、た
とえば自動車のエンジンに導入する外気中に含まれる微
細な塵埃の除去に使用する場合塵埃を含む外気が段差部
゛の空隙より漏洩するおそれなく、その成形に当っても
成形ローラの噛合い部間隙を周期的に増減することによ
って確実に成形することができ、たとえば第４図に示し
た機構の場合には歯車１８゜１９．２０．２１の減速比
を変えることにより１個分の素子に使用する片波成形体
の全長を決めることができ、またカム２１の形状を変え
ることにより攪始め部４、撞終り部５の長さおよび波高
を簡易に変更することができ、しかも波高を低くした部
分においてはろ材の使用量を節減し得る効果を有するも
のである。尚捲始め部と攪終り部の波高の傾斜は撞始め
部においてはやや急にしても差支えないが捲終り部にお
いてはなるべく緩にする方が効果的である。As described above, the present invention provides a method for forming a cylindrical filter element by rolling the single-wave molded body by gradually lowering the wave height of the corrugated filter medium 3 at the beginning and end of the winding of the single-wave molded body. Since the step at the start and end of the twist is eliminated and the contour of the cylindrical outer circumferential surface is perfectly circular, it can be used to remove fine dust contained in the outside air introduced into an automobile engine, for example. By periodically increasing and decreasing the gap between the meshing parts of the forming rollers, the molding process can be performed reliably without the risk of outside air containing air leaking from the gap in the step part, for example, as shown in FIG. In the case of the mechanism, the total length of the single-wave molded body used for one element can be determined by changing the reduction ratio of the gear 18, 19, 20, 21, and by changing the shape of the cam 21. The length and wave height of the stirring start part 4 and the stirring end part 5 can be easily changed, and the amount of filter media used can be reduced in the part where the wave height is lowered. The slope of the wave height at the end of stirring can be made somewhat steep at the beginning of rolling, but it is more effective to make it as gentle as possible at the end of winding.
第１図乃至第５図は本発明の実施例を示すもので、第１
図はフィルター素子の端面説明図、第２図は片波成形体
の長さ方向に切断した断面図、第３図はフィルター素子
を製造する第１工程を示す説明図、第４図は第３図の要
部を示す説明図、第５図はフィルター素子を製造する第
２工程を示す断面説明図である。第６図乃至第９図は従
来のフィルター素子を説明するもので、第６図および第
７図は片波成形体の斜視説明図、第８図はフィルター素
子の斜視説明図、第９図は第８図のフィルター素子の平
面状ろ材１に平行な面における断面図である。
図中１は平面状ろ材、３は波形ろ材、４は捲始め部、５
は撞終り部、６は外周面輪郭、７，８は型付ローラ、１
３は圧着ローラ、９．１０は充填材、１４．２５は接着
剤塗布装置、１７．２７は充填材９，１０の押出しノズ
ル、１Ｂ、１９゜２０．２１は歯車、２２はカム、２４
はバネを示５
算？図
手続補正書（自発）
昭和５９年 ９月 ７７日
１、事件の表示
昭和５９年特許願第１００８００号
３、補正をする者
４、代理人 〒８１１−２４
福岡県粕屋郡篠栗町大字和田１０４３番地の５５、補正
の対象
図面の欄
６、補正の内容
図面中梁４図を別紙の通り訂正します。
７、添付書類の目録
訂正図面（第４図） １通
第４−ＩＦ
手 続 補 正 書 （自発）
昭和５９年１２月２６ 日
１、事件の表示
昭和５９年特許願第１００８００号
３、補正をする者
４、代理人 〒８１１−２４
福岡県粕屋郡篠栗町大字和田１０４３番地の５５、補正
の対象
明細書の欄
６、補正の内容
明細書第８頁第３行の「カム２１」を
「カム２２」と訂正します。1 to 5 show embodiments of the present invention.
The figure is an explanatory view of the end face of the filter element, Fig. 2 is a sectional view taken in the length direction of the single-wave molded body, Fig. 3 is an explanatory view showing the first step of manufacturing the filter element, and Fig. 4 is the third cross-sectional view of the filter element. FIG. 5 is an explanatory cross-sectional view showing the second step of manufacturing the filter element. 6 to 9 explain conventional filter elements, FIGS. 6 and 7 are perspective explanatory views of a single-wave molded body, FIG. 8 is a perspective explanatory view of a filter element, and FIG. 9 is a sectional view of the filter element of FIG. 8 in a plane parallel to the planar filter medium 1. FIG. In the figure, 1 is a flat filter medium, 3 is a corrugated filter medium, 4 is a winding start part, and 5
1 is the end of the twist, 6 is the outer peripheral surface contour, 7 and 8 are the molded rollers, 1
3 is a pressure roller, 9.10 is a filler, 14.25 is an adhesive coating device, 17.27 is an extrusion nozzle for fillers 9 and 10, 1B, 19°, 20.21 is a gear, 22 is a cam, 24
5 indicates a spring? Amendment to figure procedure (voluntary) September 77, 1980 1, Indication of the case 1982 Patent Application No. 100800 3, Person making the amendment 4, Agent 1043 Oaza Wada, Sasaguri-cho, Kasuya-gun, Fukuoka Prefecture 811-24 Address 55, Column 6 of the drawing to be corrected, Contents of correction, Beam 4 in the drawing will be corrected as shown in the attached sheet. 7. Attached document inventory correction drawings (Figure 4) 1 copy No. 4-IF Procedural Amendment (voluntary) December 26, 1980 1. Indication of the case 1980 Patent Application No. 100800 3. Amendment Person 4, Agent 55-1043 Wada, Sasaguri-cho, Kasuya-gun, Fukuoka Prefecture 811-24 Column 6 of the specification subject to amendment, "Cam 21" in line 3 of page 8 of the specification of the contents of the amendment. I'll correct it to "Cam 22."
Claims (1)
材３とを接着して片波成形体となし、波形ろ材３の一端
の山部と他端の谷部とをシールして円筒状に積層成形す
るに当り捧始め部４および捲終り部５における波形ろ材
３の波高を漸次低くし、円筒外周面輪郭６を真円状に形
成したことを特徴とするフィルター素子。 ２、長尺の平面状ろ材３ａを一対の型付ローラ７゜８間
に通し波形３に型付けするに当り、両型付ローラ７．８
の噛合い部間隙を周期的に増減して撞始め部４および捲
終り部５における波高を漸次低くした波形ろ材３を得、
該波形ろ材３と平面状ろ材１とを積層接着して片波成形
体となし、該片波成形体の波形ろ材３の一端の山部と他
端の谷部とをシールして円筒状に積層成形し、円筒外周
面輪郭６を真円状に形成したフィルター素子を得ること
を特徴とするフィルター素子の製造法。[Claims] 1. A planar filter medium l and a corrugated filter medium 3 having ridge lines 2 substantially in the width direction are bonded together to form a single-wave molded body, and the corrugated filter medium 3 has a peak at one end and a trough at the other end. When sealing and laminating into a cylindrical shape, the wave height of the corrugated filter medium 3 at the beginning part 4 and the end part 5 of the winding is gradually lowered, and the contour 6 of the outer peripheral surface of the cylinder is formed into a perfect circle. filter element. 2. When passing the long planar filter medium 3a between a pair of shaping rollers 7.8 and shaping it into the waveform 3, both shaping rollers 7.8
A corrugated filter medium 3 is obtained in which the wave height at the winding start part 4 and the winding end part 5 is gradually lowered by periodically increasing and decreasing the interlocking part gap,
The corrugated filter medium 3 and the planar filter medium 1 are laminated and bonded to form a single wave molded body, and the peaks at one end and the valleys at the other end of the waveform filter medium 3 of the single wave molded body are sealed to form a cylindrical shape. A method for producing a filter element, which comprises laminating and molding to obtain a filter element having a cylindrical outer peripheral surface contour 6 formed into a perfect circle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10080084A JPS60244318A (en) | 1984-05-18 | 1984-05-18 | Filter element and preparation thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10080084A JPS60244318A (en) | 1984-05-18 | 1984-05-18 | Filter element and preparation thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS60244318A true JPS60244318A (en) | 1985-12-04 |
Family
ID=14283470
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10080084A Pending JPS60244318A (en) | 1984-05-18 | 1984-05-18 | Filter element and preparation thereof |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60244318A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5094997A (en) * | 1989-07-26 | 1992-03-10 | Nippon Soken, Inc. | Porous support |
| JP2008501524A (en) * | 2004-06-08 | 2008-01-24 | ドナルドソン カンパニー，インコーポレイティド | Z-type filtration medium packing structure and manufacturing method thereof |
| JP2008518756A (en) * | 2004-11-03 | 2008-06-05 | ボールドウィン・フィルターズ・インコーポレーテッド | Method and apparatus for winding filter media pack |
| US7488365B2 (en) | 2001-12-03 | 2009-02-10 | Donaldson Company, Inc. | Filter element using corrugated media sheet |
-
1984
- 1984-05-18 JP JP10080084A patent/JPS60244318A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5094997A (en) * | 1989-07-26 | 1992-03-10 | Nippon Soken, Inc. | Porous support |
| US7488365B2 (en) | 2001-12-03 | 2009-02-10 | Donaldson Company, Inc. | Filter element using corrugated media sheet |
| JP2008501524A (en) * | 2004-06-08 | 2008-01-24 | ドナルドソン カンパニー，インコーポレイティド | Z-type filtration medium packing structure and manufacturing method thereof |
| JP4638495B2 (en) * | 2004-06-08 | 2011-02-23 | ドナルドソン カンパニー，インコーポレイティド | Z-type filtration medium packing structure and manufacturing method thereof |
| USRE46700E1 (en) | 2004-06-08 | 2018-02-06 | Donaldson Company, Inc. | Z-filter media pack arrangement; and, methods |
| USRE48050E1 (en) | 2004-06-08 | 2020-06-16 | Donaldson Company, Inc. | Z-filter media pack arrangement; and, methods |
| JP2008518756A (en) * | 2004-11-03 | 2008-06-05 | ボールドウィン・フィルターズ・インコーポレーテッド | Method and apparatus for winding filter media pack |
| JP4819820B2 (en) * | 2004-11-03 | 2011-11-24 | ボールドウィン・フィルターズ・インコーポレーテッド | Method and apparatus for winding filter media pack |
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