JPS60502142A - Filter leaf and its manufacturing method - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] Filter leaf, its manufacturing method and manufacturing device field of invention The present invention relates to a filter leaf, and a method and apparatus for manufacturing this kind of filter leaf.

Disclosure of prior art Traditionally, filtration devices have been used to handle a wide range of materials such as water, oil, juice, syrup, and beer beverages. It has been used for filtering raw materials. The most effective filters have a closed chamber; , the liquid to be filtered is discharged under pressure into a plurality of planes feeding a common outlet. forced to pass through the filter leaves. The interior of each filter leaf communicates through a common outlet. Discharge the filtrate into this.

A typical filter leaf has a pair of screens fixed to one or both sides of the closure ring. include. The material to be filtered passes through the screen and filters within the ring and screen. Forced to enter the space. There are two types of filter leaves: rotating type and stationary type. US Patent No. No. 3,542,205 discloses a rotating filter leaf.

For many years the industry has used stainless steel closure rings with welded peripheries on both sides. We have been researching the production of stationary filter leaves with steel screens. This kind of trial However, the welding process is slow and the temperature of the closing ring increases too much during the welding process, resulting in unsuitable It was not successful because it stretched too far. When the ring shrinks after cooling, it becomes this. The welded screen becomes loose. A loose screen will be recorded, but , causing the precoat to crack.

Even a slight sag causes the screen to "eye up" when subjected to different fluid conditions. example For example, filter screens are pre-coated with a thin coating of filtration enhancer. The coating then loses the liquid pressure on it and the screen snaps back to its original position. Cracks occur upon return 1, which contaminates the filtrate during the subsequent filtration step. scree The looser the tube, the more it wrinkles and the repeated cycles between high and low pressure during filtration. As a result, the wrinkled screen bends back and forth, becomes work hardened, and breaks after R.

The present invention achieves this by manufacturing the filter leaf from a closure member to which a screen is welded. This eliminates the shortcomings of previous technologies, in which the screen tensions on the closure member and causes eye lift. In addition, there is no possibility of premature damage due to wrinkles. Furthermore, welding is conventional welding. 10 times faster than

Summary of the invention The present invention provides a filter leaf that includes a continuous, elongated closure member having a major plane. 1st time and the second screen is selected from the group consisting of electron beam welding and laser beam welding. The selected welding process secures the closure on both sides around its entire circumference, with two The filtrate extraction space is defined between the tube and the ring. Also remove the filtrate from the extraction space. A member is also provided.

The heating for welding is always limited to a small area consisting of time to ensure that the closure member does not undergo undesirable expansion and contraction. limited. Therefore, the screen fits under tension on the closure part during welding, ￥ Fi Hanamachi does not have to keep up with tension and wrinkle. Furthermore, the method of the present invention Preventing the release of internal stresses within the closure member, which is sometimes formed by bending.

If the closure member is unstressed due to excessive heating, it will warp and distort from its predetermined shape. It's gone.

In a preferred embodiment, the closure member and screen are made of stainless steel; The screen is simultaneously cut to size and welded to the closure using laser welding. be done.

In an embodiment, a separate perforated steel plate underlies each screen and an open screen A lean is placed between the perforated plate and the filter screen. A desirable aspect is also 2 It includes a rigid and permeable sabot 1- between two perforated steel plates. Preferably, this is an atomic In each group of children, steel plates, coarse screens and outer filtration screens are A permeable steel support between two permeable plates, fixed together by diffusion bonding, The periphery is tack-welded to the inside of the ring at a distance. Desired form of filter leaf In the weld, an annular inwardly extending weld bead is formed so that the screen is welded to the closure member. is formed within the closure member below the periphery of the screen.

having first and second screens welded on opposite sides of a continuous, elongated closure member; In the method of manufacturing a filter leaf, the present invention provides a method for manufacturing a filter leaf between two plates and a screen. the screen covers one side of the closure member, and the screen covers one side of the closure member and the screen. including the step of causing the outer portion of the clean to protrude outwardly from the end of the plate. school The outwardly projecting portions of the lean and closure members are exposed to laser beam or electron beam radiation. They are irradiated at either end and welded together. Closing member and outwardly projecting parts of the screen is moved relative to the laser beam or electron beam, while the chain members and and the screen are clamped together and a continuous weld of the screen is made around the entire perimeter of the closure member. A bead is formed.

When manufacturing circular filter leaves, the plate is preferably rotated about the center of the filter leaf and rotated once. The side beams will remain in place. When using a laser beam, the beam is Machining at an angle of about 30° to 50°, preferably 40° outside the main plane of the filter leaf Head to the part. After the screen has been welded to the circular closure member or ring, the plate The center of rotation will move slightly from the position where the beam contacts the processing part, and will temporarily rotate 360 degrees. The beam is rotated through the screen to remove any remaining protruding wire or weld pool roughness. ``Flame polish'' the dirty parts.

Alternatively, as described above, after the first beam performs the welding operation, the second welding beam performs the processing. It may be arranged so as to act on a portion.

In a preferred method, when clamped between said plates, the screen is initially It's the size. Then the perimeter of the screen protruding from the perimeter of one of the boards is The perimeter of the screen is cut so that it remains. The outer edge around the above area was then closed. Welded to the member.

In the device, the invention includes a bottom plate on which the closure member rests. Presser plate is on the bottom Located at a distance from the top of the board.

A desk, a presser plate equipped with a member that moves the presser plate toward and away from the bottom plate. the lower side of the screen contacts one of the screens on the closure member, causing the screen and closure member to Clamp in a fixed position against the two plates. Part of the ring and screen is pressed down. Project outward from the board. High energy sources such as electronic beams or laser beams - The welding beam hits the open chain member and the outwardly projecting part of the screen and holds them together. 1° arranged to melt and weld to the inner edge of the closure member. When the filter leaves are used for filtration, material may fall between the closure member and the screen. Minimize the tendency to overflow.

A preferred embodiment of the apparatus also provides an inert material in the space between the plate and the closure member during the welding operation. Includes a member for flushing away waste.

In addition, a member is provided to move the circumference of the plate relative to the beam, and the entire circumference of the ring is 0 to weld the screen. When manufacturing circular filter leaves, plates are preferably is rotated about the center of the filter leaf relative to the welding beam.

In some embodiments of the invention, the clamp ring presses against the outer edge of the screen. Alternatively, the screen is cut by a beam and welded to the closure member.

In another aspect of the invention, adjacent to where the beam hits the screen and closure member, The presser member presses the screen and brings it into close contact with the ring during welding.

Preferably, after completing the welding operation, the center of rotation of the plate should be moved away from the contact point of the beam. A moving member is included and the periphery of the welding screen is flame polished. form of formation , a plate is supported on a frame pivoted to a support, and the plate is attached to a welded beam. It can move towards and away from the place where it hits the machined part.

In a preferred embodiment of the invention, the bottom plate has an annular step on which the closure member rests. to properly position the closure member relative to the bottom plate and to position the ring resting on the bottom plate. 1. Providing space for a screen pre-welded on the bottom 1jl, another aspect of the invention In some cases, the pressing method includes a member for cutting the outer part of the protruding screen before welding. A narrow annular periphery projecting outwardly from the plate is retained. Next, the above surrounding area becomes a closing member. be welded.

The plate is made of a material having a substantially higher thermal conductivity than the screen and closure member. It will be. For example, if the screen and closure members are made from stainless steel, The plate may be aluminum, copper, silver or other suitable material with relatively high thermal conductivity. made from.

Brief description of the drawing FIG. 1 is a front view showing a stationary filter leaf manufactured according to the present invention.

FIG. 2 is a view taken along the line 2-2 in FIG. 1, and FIG. 3 is a view taken along line 2-2 in FIG. A perspective view of a device for 4 is a partially cutaway front view of the device shown in FIG. 3, FIG. 5 is a plan view of the device shown in FIG. 4, FIG. 6 is a view taken along line 6-6 in FIG. 5, and FIG. 7 shows the illustration device shown in FIGS. an enlarged cutaway perspective view showing one end of the frame to be placed; Figure 8 is an enlarged sectional view of the area within arrow 8 in Figure 4, and Figure 9 is along line 9-9 in Figure 6. Figure 10 shows cutting the screen before welding it to the closure. FIG. 11 is an enlarged, partially cutaway front view showing an apparatus for producing bread made in accordance with the present invention. Longitudinal front view of mold filter leaf, FIG. 12 is a longitudinal sectional front view of a temporary filter leaf manufactured according to the present invention.

Description of preferred embodiments In Figures 1 and 2, the stationary circular filter leaf is It includes a circular closure ring with a mouth 22. The outlet of the filter leaf transfers the filtrate from inside the filter leaf. It is connected to a normal header pipe 24 for movement. The main plane of the closure ring is on the filter leaf. Limit the main plane. The diameter of the filter leaf can be any suitable size, for example 48 inches (1,2 m), and the closure ring has a rectangular or other desired shape in cross section. typical In a 48 inch (1.2 m) circular stationary filter leaf, the cross section of the closing ring is 1/2 in x 1/2 in (1.27 cm x 1.27 cm).

As shown in FIG. (in Figure 2) is welded around the entire circumference. The second three-layer diffusion adhesive thin layer 28 is the closing ring Welded around the entire circumference of the lower side (in Figure 2) of the annular slit between the two thin layers. ・Screen or coarse mesh screen (e.g. 1 mesh screen) The single circular piece 30 of the tubular slit screen has a circumference of approximately It is fixed to the inner surface of the closure ring by tack welds 31 at intervals of .degree.

Each tri-layer lamina includes an outer filtration screen 32, which is circular in shape and illustrated in FIG. 24x 110r D cutchJ or HF75 stainless steel screen It has a relatively fine mesh similar to that of is welded to one side of the closure member. For example, 16 mesh stainless steel A circular coarse screen 34 of ears lies below each fine screen, and a perforated plate 36 are placed on each side of the tubular slit screen. Preferably the perforated plate is centered 1/4 in (6,4 mm) staggered 3/16 in (4,8 mm) Made of 20 gauge stainless steel with perforated holes. As mentioned above, each three-layer type thin layer The outer filtration screen, coarse screen and perforated plate are diffusion bonded together and compared form a solid structure. The fine screen and perforated plate each fit inside the closure ring. It has a diameter slightly smaller than the diameter. The diameter of the coarse screen is the inner diameter of the closing ring. It is slightly larger than the ring and overlaps the inner edge of the ring, where the fine screen is about 1/2 8 in (3.2 mm) attached to provide material for welding. Actually above The mold shape should be made as small as possible to avoid voids in the non-welded parts of the fine screen and closure ring. Minimize the distance between This part of a traditional filter leaf is used to transfer solids from liquids. This reduces the number of undesirable pitfalls.

As will be described in more detail below, the three The layer diffusion adhesive thin layer forms a tight "coat" on both sides of the closure ring. Each “film” is a three-layer diffusion bond and a tubular slit that itself provides a solid sabot. The three layers on top of the screen make it relatively solid.

There are no wrinkles or slack in the thin layer, and the filter leaves are reused throughout the various stages of the filtration process. However, the metal screen will not be work hardened. Therefore, the filter leaves are subjected to harsh usage conditions. However, it has a long and reliable lifespan. Manufacturing the filter leaves shown in Figures 1 and 2 The apparatus for this purpose is shown in FIGS. 3 to 10.

The device includes an upright frame 40 supported on supports 42. the frame is on the bottom Includes a pair of elongate, parallel, and horizontal channel beams 44, each beam having opposing ends. Welded to legs 46 and 47 of. The pedestal is a horizontal groove type placed on supports 1 to 42". Consists of a beam. Each of the integral vertical legs 49 is secured at its lower end to a foot 46.47. Ru. An upper pair of longitudinal, parallel, horizontal channel beams 52 connect each end to each leg 49. Fixed at the top end.

A rotatable circular horizontal bottom plate 60 is attached from the lower channel beam 44 by a bracket 66. One end of a vertical drive shaft 62 pivoted within a supported thrust hair ring 64 Supported by The lower end of the drive shaft supports a pulley 68 driven by a belt 70 The belt 70 is driven by a drive pulley connected to a variable speed motor 76 via a shaft 74. Driven. As shown in FIG. 8, the bottom plate 60 includes an annular upright wall 80 around its entire circumference. nothing. The annular inwardly extending horizontal step 82 at the bottom of the wall 8o is a circular-V-oriented open narrow space 84. terminate. During the welding operation, the closure ring 2o rests on the step 82. outside the ring The surface 86 is in contact with the inner surface of the upright wall 80 and is in contact with the center of the bottom plate and the rotation axis of the drive shaft 62. It is positioned centrally against the As shown in FIG. 8, the first three-layer diffusion adhesive thin layer 26 is Already welded to the bottom side of the closure ring, the outer filtration screen 32 also has a horizontal step 82. It fits tightly within the circular cavity 84 adjacent to the inner edge of. The second three-layer diffusion adhesive thin layer 28 is 92, such as a gas or crystal laser, or an electron beam. The process of welding to the upper side of the closure ring using a welding beam 90 with high energy It is in. Of course, if an electron beam is used, the entire equipment should preferably be in a vacuum chamber. □An outer filter screen, as shown in FIG. 8, is enclosed within a chamber (not shown). A ring 32 extends substantially completely across the upper side of the closure ring 20 and includes a suitable material welded to the ring. Secure suitable materials. However, in reality, welding should be done as close to the inner surface of the ring as possible. be called. For example, preferably the weld is only 0.1 to 0.2 mm from the inner surface of the ring. in (2,54 to 5.08n++n). As a result, the outer filter The clean 32 is supported concentrically above the bottom plate 60 and is on the lower side of the elliptical presser plate 98. Clamped against the upper side of the closure ring (in FIG. 8) by a downwardly extending annular wall 96. It will be done.

The outer diameter of the holding plate is 1y’8+n (3.2 mm) larger than the inner diameter of the closing ring. The overlap is therefore approximately 1/16 inch (1.6 mm).

The holding plate is supported by a spider 100 fixed to the soil surface of the plate, and the spider The figure shows screws 1 to 1 in the air cylinder 104 fixed between the upper beams 52. 1) (supported via a connected vertical screw 1hen 11yl-). Compressed air is supplied to both ends of the cylinder by known members (not shown) and the piston , the piston, [Tsurado spike] and the holding plate can move up and down with respect to the bottom plate, and the 8. Clamp the closed steel ring and outer filter screen as shown.

As mentioned above, the diameter of the retainer plate is only slightly larger than the inner diameter J of the closure ring. example For example, if the closure ring has an inner diameter of 47 inches (1194 mm), the The outer diameter is 47.1/8 in (1197 mm). As shown in Figure 8, press The thickness of the downwardly extending annular wall 96 on the lower surface of the retainer plate is such that the retainer tab rests against the inner edge of the closure ring. is equal to the amount. If desired, the annular wall 96 can be removed to make the bottom surface of the presser plate flat. becomes. This is the case when the holding plate is lowered to the clamp position as shown in Figure 8. Provides firm contact of the bottom surface of the presser plate to substantially the entire area of the clean. This is scree This creates a smooth action on the surface of the tube and eliminates any wrinkles that may appear before welding.

As shown in FIGS. 5, 6, and 9, the curved leaf spring blade 110 is attached to the bottom plate. It extends downward from a fixed bracket 112 that is supported adjacent to the surrounding soil surface. Bu The rad extends generally tangentially downwardly toward the bottom plate and curves upwardly in a concave manner.

The lower end of the curved plate blade contacts and welds against the downward facing outer filtration screen. At a position immediately in front of the screen passing below the beam 90, adjacent to the periphery of the presser plate 98. and hold the screen in firm contact with the top of the closure ring. . As shown in FIG. and the presser plate 98 are indicated by arrows'? Move from right to left and welding beam 90 or step A weld bead 33 is formed at the location against the clean and closing ring. this position The beam then cuts the screen by melting it. At the same time, the beam It quickly penetrates and dissolves into the part of the ring that lies below the cutting screen. two The molten metal from the parts melts, cools, solidifies, and fills the inner part of the screen. Form a weld bead that adheres to the ring and also removes the outer portion of the screen. Let it remain.

As best shown in Figures 4, 8 and 9, the welding beam is aligned with the main plane of the filter leaf. At angle A, the angle between the beam and the main plane of the filter leaf is approximately 40°. The angle actually cuts through the screen and at the same time dissolves the ring so that the outer part of the screen 1 It has been found to be advantageous to produce a weld bead that retains 3. if If this angle increases above about 50°, the weld will be inadequate and the screen will The cut will be incomplete. If this angle is reduced to 30°, the bead will be in the machined part. It will not bounce and melt metal.

In addition, if the outer filter screen is arranged as shown in Fig. 8, This can be achieved by using a substantial portion of the closure ring that extends beyond the upper surface of the closure ring. It is advantageous to hold down the outer edge of the protruding screen, so that the screen and closing ring to ensure contact of these where the tubes are applied by the welding beam. .

Finally, an annular clamp ring 12o (shown only in Figure 8) is attached to the top surface around the bottom plate. It is fixed by a bolt 122.

The retainer ring includes an annular inwardly and downwardly extending flange 124, the outer end of which extends downwardly. It has a horizontal surface 126 on the side, slightly outside the path followed by the welding beam when the device is rotated. Contact against the outer filtration screen.

Preferably, the bottom plate, retainer plate and clamp ring are all typically made of stainless steel. It is made of a material that has a higher thermal conductivity than the material to be welded. For example, stainless steel Steel is 133BTU/ft2-hr-'F (649kcal 1m2. It has a thermal conductivity coefficient of hr・'C). The thermal conductivity coefficient of aluminum is 13908T U/[[2・hr・cho (6787kcal/m　2−　hr・’C), copper is 27 00B T (J/ft2 - hr-6F (13183kcal/m2 - hr・℃), silver is 2900B T (J/ft2-hr-'f2< +4+59kcal/m2・hr・℃). aluminum, copper, silver, or or alloys of these or similar metals for the bottom plate, retainer plate, clamp ring, and When used for the hold-down blade, the heat quickly dissipates from the welding area and closes the closure ring. Overheating, overstretching, and stress release can be prevented.

To protect the metal during welding, an inert gas such as argon or helium is passed through the holding plate. It is injected through a flexible sheath tube 130 that is connected to a vertical lumen 132 that extends through the tube. inactive The gas is forced into the space between the holding plate, the annular ring and the bottom plate.

Gas escapes through the non-welded portion of the outer filtration screen.

Therefore, the screen and closure ring are injected with inert gas from the inside to the outside. scree, which isolates oxygen from the molten metal during welding operations. This is sputtering of molten metal. Reduces noise and produces better welds, as well as when a laser source is used. Prevent contamination of the lens (not shown) used to focus the welding beam . Inert gas is also supplied to the external welding area of the holding plate.

As previously mentioned, high energy welding beam 90 may be supplied from a variety of suitable sources. I can do it. Ordinary carbon dioxide or YAG (yttrium - aluminira 1 1 - Garnet) leather heats a very small area and closes the ring during welding operations. Since it is not overheated, good welding is achieved.

This works in conjunction with the heat transfer provided by the aluminum enclosure to create a continuous closure. Amazing results were obtained when welding the screen around the entire circumference of the material. The closed part will not shrink and the screen will not wrinkle.

This provides a filter leaf with long life even under harsh conditions of use.

During the welding operation shown in FIG. 8, the high energy welding beam 90 is capable of melting the screen. Cut it with Invading.

The result is an annular weld bead 33 shown in FIG. Surprisingly, the weld bead Glue the closure ring around only the inside part of the screen and attach it to the outside of the screen. part remains freely. The bead has an inwardly and downwardly extending annular flange 134. and the inner part of the screen is against the closure ring around the entire circumference of the screen. In addition to being closed, there is an inward-facing mouth recessed within the closure ring and a downwardly extending flange. mechanically secured to the closure ring by screws 134.

An important advantage of the invention is that the cutting and welding of the screen can be carried out using known laser equipment. At the same time, perform at a relatively high speed of fU or 2o to goin (0.5 to 2m). It is something that can be done. This is approximately 2 to 3 inches (5 to 7.6 cm) per minute. 　Acetylene oxide scum or inert gas/arc melting speed is limited to substantially faster compared to Furthermore, acetylene oxide gas or inert gas Welding overheats the ring and the screen wrinkles as the ring cools.

Once the welding is complete, the clamp ring is removed and the cutting tube of the outer passing screen is removed. The TU is retired. If the wires are cut incompletely, these Destroy by bending. The unmelted parts are then "flame polished", e.g. To the right in Figure 8, approximately 0.020 inches from the position where the welding beam hits the processed part. (0.51 mm) by moving the rotation center of the lower side and the presser plate. It fuses with the weld bead. The process is then repeated and the welding beam is At the same time, these are melted and fused together with the welding beam.

In order to move the center of rotation as described above, the vertical pivot pin 140 supports the foot 41. 2, the frame 40 can pivot in a horizontal plane around the vertical axis of the non-contact pin. 7. The other leg 46 can slide on supports 1 to 420, and is welded to the leg 46 vertically. By means of an adjustment nut l-144 screwed into horizontal degree screw 146 on the opposite side of plate 148. It is moved left and right (in Fig. 4). One end of the screw 146 is welded to the support 42. The other end of the plate 148 is fixed to the bracket 150 with the opening (not shown) and extends. Therefore, when the nut 144 is rotated, the frame is rotated by the pivot pin 140. Position accurately by circling around.

Instead, legs 46 and 47 are supported to slide in spaced paths on their respective supports. Yes, then the center of rotation will move along a straight line instead of a curved line.

FIG. 10 shows a modified embodiment of the invention, in which the -C A cutting wheel 160 is supported and secured to the sabot 1 by suitable members (not shown). Horizontal shelves 1-162 on the lower end of the upwardly extending bracket 164 rotate around. The usual adjustment members (not shown) are the bracket 164 and the shirt. i~ 162 is provided for operating below -F with respect to the bottom plate 60, and the cutting wheel The bottom plate engages an outer filtration screen that rests on the closure ring 20-''. The cutter wheel is rotated at a suitable speed to cut through the outer filter screen. vinegar The cut portion of the clean is removed and the remaining screen is then closed off as described above. welded to the ring. The advantage of the device shown in Figure 10 is that the high-energy welding beam cuts It does not need to be used for cutting operations, therefore requires less time and force, and is suitable for welding operations. melting and avoiding melting only the parts of the screen and closure ring that form the All you have to do is focus the beam on that.

Although the present invention has been described in detail with respect to stationary filter leaves, it is understood that rotating filters may also be used in accordance with the present invention. It can be manufactured easily. In fact, filter leaves can be square, rectangular, triangular, oval, etc. It can be of various shapes, and it can also be made to have only one screen on the right. I can do it. For example, Figure 1 shows a bread-shaped leaf, which is a flat, square stone () or a long stone. A narrow pan having a square bottom 172 and an upwardly extending wall 174 around the perimeter of the pan bottom. 170 (closing member). The outer filtration screen 176 is constructed according to the invention described above. use an X-Y table to operate the processing part or laser source. The screen is welded to the upper edge of wall 174 around its entire circumference. A continuous weld bead 178 is formed around the entire perimeter of the screen to be adhered to the two edges of the screen. Ru. A filtrate space is thus formed between the screen and the closure pan 170.

Transfer the filtrate to the drain pipe 182 in the center of the pan. Coarse screen if desired 184 is disposed within the pan to support the outer filtration screen 176.

FIG. 12 is a longitudinal sectional front view of the plate wall filter leaf 190, which shows the number of radial directions on the top surface. It includes a circular plate 192 (closure member) with elongated ribs 194. The ribs meet in the center of the board. The filter screen on the ribs has transverse drainage holes 196 that meet and extend through them. The filtrate (not shown) passing through the tube 198 flows to a common outlet 200. The contracting screen 198 is connected to the plate 1 by weld beads 202 around its entire periphery. 92, with a filtrate collection space between the filter screen and the plate or closure member. 1. Temporarily, depending on the conditions in which the filtration device will be used, the screen will be supported. Contains as many ribs as necessary to

From the foregoing description, it can be seen that the present invention involves welding components together by a high-energy welding beam. To this end, we have developed an improved AI misscreen that is quickly and easily manufactured. It is clear that the closure member surrounding the filter leaf does not shrink even after the welding operation. Therefore, it is possible to prevent the formation of wrinkles that cause premature damage under harsh conditions.

Furthermore, the weld bead is close to the inner edge of the closure member and prevents unwanted material from entering during filtration and cleaning. Dropping and holding deck 1 substantially eliminates space.

The invention is described in the manner in which the workpieces to be welded are rotated - 6 the welding beam is stationary. Although it has been described previously, the opposite configuration is also possible, where the beam moves while the workpiece remains stationary. It is. For example, the source of the welding beam can be X-Y mathematically controlled - supported on a table. By doing so, it is possible to trace the welding line of a desired trajectory. Alternatively, for those skilled in the art In a known manner, the bottom plate and the presser plate are supported on an X-Y table for control operation. You can also do it.

′Engraving (Contents: No changes) Handbook Supplementary Book August 23, 1985 Mr. Michibe Uga, Commissioner of the Patent Office 1. Indication of case PCT, 'US 831013182, title of invention Filter leaf arrangement A person who makes amendments to the manufacturing method 3. Relationship to the incident: Patent applicant Address: United States, California 90608, Name: United Sfutz Filter Fluid Systems Corporation Representative Chaudbury, A, B, Roy 4゜ Agent 2-14-1 Shimogo, Shinjuku-ku, Tokyo 5. Roy of the amendment order 4. Amendment to be made at the same time as the request for examination of the application 6. Details of the subject of amendment column for the title of the invention in the document, column for the scope of claims, (contents of amendment) (1) In the column of the title of the invention for the specification, write [filter leaf, manufacturing method and manufacturing device thereof]. The description of the filter leaf and its manufacturing method First, I corrected it.

(2) Amend the statement in the scope of claims column of the specification as shown in the attached sheet.

3) In the specification page 1 attached to the application, line 4 to line 5 of the same page, “Manufacturing method and and manufacturing equipment. ”, Regarding the manufacturing method.

I will correct it.

(4) From page 16, line 9 to line 15 of the same specification, "For example... Ru. For example, the thermal conductivity of stainless steel is 133B T tJ/f. t2・hr・ton/in, whereas aluminum is 1390 and copper is 2 700, and silver has a heat transfer value of 2900 (the six-value units are the same as for stainless steel above). It has conductivity.

I will correct it.

()sni-) 2. Scope of claims (1) A closing member that covers a flat surface including a band-shaped portion extending all around the circumference; a screen covering the closure member with an edge proximate to the strip; A screen that adheres the edge of the screen to the strip around the entire circumference M''B of the edge of the screen. Made of the same material as Lean (2) The screen has a side surface facing the closing member. , the edge surrounds the side surface, and the screen is flat, and the beads are flat on the screen. Gluing the edge of the screen to the strip without connecting the sides of the screen to the closure member. A filter leaf according to claim <1).

(3) The closing member has an inner periphery that forms a space inside, an outer periphery, and these peripheries. The screen consists of a closed frame having flat sides extending between the , covering an open space such that its outer periphery overlaps and adjoins the side surface of the frame. Special: 'r　The filter leaf described in item (1) of the scope of the request.

A filter leaf according to claim (1).

(8) According to claim (1), having a liquid outlet formed in the closure member. The filter leaf described.

(9) A flap in which the beat protrudes from the edge of the screen toward the center of the closing member. The filter leaf according to claim (1), which has a ridge.

(10) The screen has an outer layer of a fine screen and a coarse screen. Three-layer diffusion bonding consisting of an intermediate layer and an inner layer of perforated plates that are more rigid than these screens. The filter leaf according to claim (2), which is a thin layer.

(11) A patent in which the intermediate screen and perforated plate are entirely contained within a frame. A filter leaf according to claim (10).

(12) A continuous frame in which the beat projects into the closure member towards the center of the screen. The filter leaf according to claim (1), which has a lunge.

(t3) The flange is closed at an angle of about 30° to about 50° with respect to the flat surface. A filter leaf according to claim 121 which projects into the member.

(14) The angle is about 40° (a certain patent, i'i51 range No. (13) The filter leaf described in section.

θ5) Screw welded around the entire circumference to a continuous, elongated closure member to the right of the main plane. A method for producing a lean filter leaf, comprising: A screen covers one side of the closure member and a portion of the closure member and a portion of the screen Clamping the closure member and screen together so that they overlap Closed by a welding beam selected from the group consisting of electron beam and laser beam Irradiates the area where the parts and the screen overlap and welds them together. Avoiding fusion together in beads; While clamping the closure member and screen together, Move the area around the overlapped area relative to the beam to cover the entire periphery of the screen. forming a continuous weld of the screen to the closure member across; A manufacturing method characterized by:

10 Through all the above steps, the first screen is welded around its periphery to one side of the closing member. , then repeating the entire process to weld the second screen to the other side of the closure member. A manufacturing method according to claim θ.

(17) Said melting and fusion creates an inwardly directed, elongated weld bead in the closure member. A manufacturing method according to claim (15).

(1) The clamping process involves rotating around the center of a circular closing member, etc. Claims that include moving the closure member and screen beyond the welding beam The ° base method described in the θth term of the range.

19) Place the closure member and screen at least 20 inches/ The patent claim includes a step of moving at a speed of min (0,5n+/min) The manufacturing method according to item 1 or item 10 of the range.

G! ■ The speed is at least 40in / 1nin < 1.0m (21) Claims wherein the beam is inclined at an angle of 40° from the main plane of the closure member. Item (1) or the manufacturing method described in item (1).

(2) Claim (21) in which the angle is about 30° to about 50° Manufacturing method described.

(2 marks: After the screen is welded to the closing member, the beam contacts the screen. Move the center of rotation of the plate away from the position where you want it to be, and then move the plate against the beam. Claim (18) includes the step of rotating and polishing the outer periphery of the weld. Manufacturing method described.

(24) Cut a part of the overlapping part of the screen and use the remaining part of the closing member. Avoid remaining on one side, and the irradiation step is followed by irradiating the remaining part. Claims characterized in that the screen is welded to the closure member. The manufacturing method according to item (15) or item θ.

(Two) The irradiation process is performed by irradiating the screen along a line spaced from the outer periphery of the screen. The scope of claim '1 of the special crystal, which includes irradiating and cutting the material and simultaneously welding it to the closing member. The manufacturing method described in item 1 or item θe.

(20) The screen has an inner part that covers the closure member and an outer part that surrounds the inner part. the inner part of said screen is welded to the closure member and the outer part is self-welding. Remaining claims 29 (29).

(27) If the welding beam is approximately ) October 1985≠Sun Mr. Michibe Uga, Commissioner of the Patent Office 1. Indication of incident PCT/LJS 831013182, title of invention Filter leaf arrangement 3. The person who makes the amendments to the manufacturing method and the agricultural equipment. Relationship to the incident: Patent applicant Address: United States, 90608, California, Whittier, Ys. Bhutto Nam Story 1-12442 Name: United Stake Filter: Fluid 6, Correction Target: Patent The inventor's column, patent applicant's column, and committee of the document pursuant to the provisions of Article 184-5, Paragraph 1 of the Act. Letter of Appointment 1 Dogbushi International Investigation Report

Claims (1)

[Claims] 1. a continuous, elongate closure member defining a major plane and its entire circumference on one side of the closure member; the screen welded over the space between the screen and the closing member; Lean is a welding process selected from the group consisting of electron beam welding and laser beam welding. A member that is welded to the closure member by a contact process and that moves the filtrate from the collection space. A filter leaf characterized by consisting of. 2. A continuous, elongated closure member that defines a major plane, and one side of the closure member that has its entire periphery. A first screen welded around the entire circumference of the first screen and a welded screen welded around its entire circumference on the opposite side of the closure member. a second screen that is abutted and defines a filtrate collection space between the two screens and the closure member; From lean and each of both screens, electron beam welding and laser beam welding be welded to the closure member by a welding process selected from the group consisting of: A filter leaf comprising: a member for moving filtrate; 3. The screen is made of stainless steel, and the closing member is made of stainless steel. 2. The filter leaf according to claim 1, which comprises a filter leaf comprising: 4. Another third screen with a coarser mesh than the first and second screens has a rougher texture than the first and second screens. disposed against each inner surface of the second screen, and more than any of said screens. Another rigid perforated plate is disposed against each inner surface of each third screen to provide rigid permeability. Claim 2, wherein the separator is disposed between and in contact with the perforated plates. The filter leaf on the top. 5. The screen, the perforated plate and the closing member are circular, and the third screen and the closing member are circular. 5. The filter leaf according to claim 4, wherein the perforated plate and the perforated plate are in close contact with the inside of the closing member. 6. A claim in which the screens and plates on each side of the separator are diffusion bonded together. The filter leaf according to item 4 or 5. 7. The separator is glued to the inside of the ring at a location away from its surrounding border. The filter leaf according to claim 5. 8. Each of said first and second screens is closed by another continuous annular weld bead. An inwardly converging ring fixed to the part and each weld bead formed integrally with the weld bead. The filter leaf according to claim 2 or 3, which has a shaped portion. 9. A continuous, elongated closure member with a filter leaf having a screen welded around its periphery. An apparatus for manufacturing, comprising: a bottom plate on which a closure member is placed; a presser plate spaced above the bottom plate; The presser plate is brought closer to the bottom plate, and the lower surface of the presser plate is the screen of the closing member. clamping the screen and closure member in a fixed position relative to the two plates. so that the ring and screen overlap and protrude outward from the holding plate. A member to A high energy source selected from the group consisting of a laser source and an electron beam source. - a welding beam applied to the closure member and the outwardly projecting part of the screen; a welding beam energy source arranged to melt and weld them together; A manufacturing device characterized by comprising a base and a base. 10. Claim 9, wherein the retainer plate terminates adjacent to the inner edge of the closure member. manufacturing equipment. 11. Claims including a member for flowing inert scum into the space between the plate and the closing member 9. The manufacturing apparatus according to item 9. 12. Activate the circumference of the plate against the welding beam and place the screen around its entire circumference. 10. The manufacturing apparatus of claim 9, further comprising a member welded to the closure member. 13. A claim in which the plates have the same shape and include a member for rotating the plates with respect to the welding beam. The manufacturing apparatus according to item 12. 14. The periphery of the screen that is spaced apart from the presser plate and projects in the vertical direction from the presser plate; an annular clamp lip arranged to engage and hold the screen against the bottom plate; 10. The manufacturing apparatus according to claim 9, which comprises: 15. Claim 12, wherein the clamp ring is fixed to the bottom plate. The manufacturing equipment described in . A request that includes a stationary holding member that rests on the screen slightly in front of the point where it contacts the screen. The manufacturing apparatus according to item 13 of the scope of demand. 17. Move the center of rotation of the plate relative to the position where the welding beam contacts the screen 14. The manufacturing apparatus according to claim 13, further comprising a member that causes 18. The plate is supported on a frame, and the frame is pivotable relative to the support. It is supported by a support, and the center of rotation of the reel is at the position where the welding beam touches the screen. 18. The manufacturing apparatus according to claim 17, which is movable relative to the manufacturing apparatus. 19. Claim 9, wherein the bottom plate includes an upward annular step on which a closure member is placed. Or the manufacturing device according to item 13. 20. Cut the outer part of the screen that protrudes from the presser plate, and Claim 9 includes a member that provides an annular periphery of the screen that protrudes from the screen. or the manufacturing apparatus according to item 13. 21. The welding beam is at an angle of about 40° to the screen outside the main plane of the filter leaf. Claim 9 or 9 comprising a laser beam oriented to protrude at an angle of or the manufacturing apparatus according to item 13. 22. The angle of claim 21, wherein said angle is between about 30° and about 50". Manufacturing equipment. 23, wherein said plate has a substantially higher thermal conductivity than the screen and closure member; The manufacturing apparatus according to item 9 of the scope of demand. 24. The plate is made of a metal selected from the group consisting of aluminum, copper and silver. The manufacturing apparatus according to claim 23. 25. Screws welded around the entire circumference to a continuous, elongated closure member with a major plane There were 7 people who manufacture filter leaves with lean characteristics. A screen covers one side of the closure member, and the outer portion of the closure member and screen Clamp the closure member and screen between two plates so that they project outward from one another to do and a welding beam of energy selected from the group consisting of an electron beam and a laser beam; irradiate the screen and the outwardly protruding parts of the closing member with a beam to melt them. of the closure member and screen by fusing them together at the weld bead. while moving the closure member and screen around the outwardly projecting portion relative to the beam. Clamp together and connect the screen to the ring around the entire perimeter of the screen. forming a continuous weld; 26. Weld the first screen around it to one side of the closing member with its central part opened. After that, repeat the cloning described in claim 25, and then apply the second screen. Claim 25, in which the above two U culms are repeated when welding to the other side of the open chain member. Production method. 27. The melting and fusing is performed by welding an H screen inwardly within the closure member. a continuous, longitudinal weld having an annular portion extending upwardly from the side of the closing member 26. A manufacturing method according to claim 25, which produces beads. 28. The plate and the open chain member are circular, and the plate is rotated about their center. The claim includes the step of moving the closure member and screen through the welding beam. The manufacturing method according to scope item 25. 29, said closure member and screen to the beam at least 20! n/　m :n　(0.5m　/　m!n　) The manufacturing method according to item 25 or item 28. 30. The speed is at least 40 in/min (10, m/min) The manufacturing method according to claim 29. 31, wherein said beam is inclined at an angle of 40' from the main plane of the closure member. The manufacturing method according to item 25 or item 28. 32. The manufacture of claim 31, wherein said angle is about 30° to about 50°. Method. 33. After the screen is welded to the closure member, the beam contacts the screen. Move the center of rotation of the root away from the position where it should be, then rotate the plate relative to the beam. The manufacturing method according to claim 28, including the step of rolling the weld and polishing the outer periphery of the weld. Law. 34. Cut the outwardly protruding part of the screen and make a screen that protrudes from one plate. The surrounding area of the screen remains, and the 1m91 protruding area is irradiated to close the screen. The manufacturing method according to claim 25 or 28, wherein the manufacturing method is welded to. 35. Irradiate the screen along a line away from the periphery of the screen, and Claim 25 or 2, in which the ring is cut and simultaneously welded to the closing member. The manufacturing method according to item 8. 36. The inner part of said screen is welded to the closure member, and the outer part remains free. The manufacturing method according to claim 35. 37. said welding beam is inclined at an angle of about 30° to about 50° from a major plane of the closure member; 37. The manufacturing method according to claim 36.