GB2307426A - Filter sleeve - Google Patents

Filter sleeve Download PDF

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Publication number
GB2307426A
GB2307426A GB9524045A GB9524045A GB2307426A GB 2307426 A GB2307426 A GB 2307426A GB 9524045 A GB9524045 A GB 9524045A GB 9524045 A GB9524045 A GB 9524045A GB 2307426 A GB2307426 A GB 2307426A
Authority
GB
United Kingdom
Prior art keywords
sleeve
filter
base member
base
filter sleeve
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
GB9524045A
Other versions
GB9524045D0 (en
Inventor
Shyam Kumaran
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Scapa Group Ltd
Original Assignee
Scapa Group Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Scapa Group Ltd filed Critical Scapa Group Ltd
Priority to GB9524045A priority Critical patent/GB2307426A/en
Publication of GB9524045D0 publication Critical patent/GB9524045D0/en
Priority to PCT/GB1996/002890 priority patent/WO1997018883A1/en
Priority to AU76341/96A priority patent/AU7634196A/en
Publication of GB2307426A publication Critical patent/GB2307426A/en
Withdrawn legal-status Critical Current

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
    • B01D46/02—Particle separators, e.g. dust precipitators, having hollow filters made of flexible material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
    • B01D29/11—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with bag, cage, hose, tube, sleeve or like filtering elements
    • B01D29/111—Making filtering elements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
    • B01D29/11—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with bag, cage, hose, tube, sleeve or like filtering elements
    • B01D29/13—Supported filter elements
    • B01D29/15—Supported filter elements arranged for inward flow filtration
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
    • B01D29/11—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with bag, cage, hose, tube, sleeve or like filtering elements
    • B01D29/13—Supported filter elements
    • B01D29/23—Supported filter elements arranged for outward flow filtration
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
    • B01D29/50—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with multiple filtering elements, characterised by their mutual disposition
    • B01D29/52—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with multiple filtering elements, characterised by their mutual disposition in parallel connection
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/08—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using ultrasonic vibrations
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/11—Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
    • B29C66/112—Single lapped joints
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/13—Single flanged joints; Fin-type joints; Single hem joints; Edge joints; Interpenetrating fingered joints; Other specific particular designs of joint cross-sections not provided for in groups B29C66/11 - B29C66/12
    • B29C66/131—Single flanged joints, i.e. one of the parts to be joined being rigid and flanged in the joint area
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/302—Particular design of joint configurations the area to be joined comprising melt initiators
    • B29C66/3022—Particular design of joint configurations the area to be joined comprising melt initiators said melt initiators being integral with at least one of the parts to be joined
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/345—Progressively making the joint, e.g. starting from the middle
    • B29C66/3452—Making complete joints by combining partial joints
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/40—General aspects of joining substantially flat articles, e.g. plates, sheets or web-like materials; Making flat seams in tubular or hollow articles; Joining single elements to substantially flat surfaces
    • B29C66/49—Internally supporting the, e.g. tubular, article during joining
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
    • B29C66/51—Joining tubular articles, profiled elements or bars; Joining single elements to tubular articles, hollow articles or bars; Joining several hollow-preforms to form hollow or tubular articles
    • B29C66/53—Joining single elements to tubular articles, hollow articles or bars
    • B29C66/534—Joining single elements to open ends of tubular or hollow articles or to the ends of bars
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
    • B29C66/51—Joining tubular articles, profiled elements or bars; Joining single elements to tubular articles, hollow articles or bars; Joining several hollow-preforms to form hollow or tubular articles
    • B29C66/54—Joining several hollow-preforms, e.g. half-shells, to form hollow articles, e.g. for making balls, containers; Joining several hollow-preforms, e.g. half-cylinders, to form tubular articles
    • B29C66/542—Joining several hollow-preforms, e.g. half-shells, to form hollow articles, e.g. for making balls, containers; Joining several hollow-preforms, e.g. half-cylinders, to form tubular articles joining hollow covers or hollow bottoms to open ends of container bodies
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
    • B29C66/51—Joining tubular articles, profiled elements or bars; Joining single elements to tubular articles, hollow articles or bars; Joining several hollow-preforms to form hollow or tubular articles
    • B29C66/54—Joining several hollow-preforms, e.g. half-shells, to form hollow articles, e.g. for making balls, containers; Joining several hollow-preforms, e.g. half-cylinders, to form tubular articles
    • B29C66/545—Joining several hollow-preforms, e.g. half-shells, to form hollow articles, e.g. for making balls, containers; Joining several hollow-preforms, e.g. half-cylinders, to form tubular articles one hollow-preform being placed inside the other
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
    • B29C66/61—Joining from or joining on the inside
    • B29C66/612—Making circumferential joints
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
    • B29C66/65—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles with a relative motion between the article and the welding tool
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/71—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the composition of the plastics material of the parts to be joined
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/73—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/739—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/7392—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of at least one of the parts being a thermoplastic
    • B29C66/73921—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of at least one of the parts being a thermoplastic characterised by the materials of both parts being thermoplastics
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/81—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
    • B29C66/814—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps
    • B29C66/8145—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the constructional aspects of the pressing elements, e.g. of the welding jaws or clamps
    • B29C66/81463—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the constructional aspects of the pressing elements, e.g. of the welding jaws or clamps comprising a plurality of single pressing elements, e.g. a plurality of sonotrodes, or comprising a plurality of single counter-pressing elements, e.g. a plurality of anvils, said plurality of said single elements being suitable for making a single joint
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/83—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools
    • B29C66/832—Reciprocating joining or pressing tools
    • B29C66/8322—Joining or pressing tools reciprocating along one axis
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/83—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools
    • B29C66/836—Moving relative to and tangentially to the parts to be joined, e.g. transversely to the displacement of the parts to be joined, e.g. using a X-Y table
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/14—Filters

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Filtering Of Dispersed Particles In Gases (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)

Abstract

A filter sleeve for use in a filtering apparatus having a filter plate (2) with one or more openings (4) from which one or more such filter sleeves (6) may extend. The filter sleeve (6) comprises an open ended sleeve member (12) to which a base member (14) is secured by ultra-sonic welding.

Description

Filter Sleeve The present invention relates to a filter sleeve and, in particular, to an improved base arrangement for a filter sleeve.
Conventional filter arrangements, such as that described in GB2287660, comprise at least one filter sleeve suspended from a corresponding opening in a filter plate, the sleeve being supported in the opening by a support band. Dust laden air strikes the outer surface of the sleeve and then escapes through the opening at the top of the sleeve, depositing a particulate cake on the outer surface of the fabric. The sleeve is supported by an internal frame, commonly a metal cage. The bottom opening of the sleeve is sealed by means of the wire mesh gauze provided at the base of the cage.
A common problem with such conventional filtering apparatus is that a significant amount of dust penetrates the filter sleeve and settles at the base of the sleeve and/or wire cage. Particulate matter slowly builds up within the cage. Hence it is necessary when replacing a sleeve that the dust pile in the cage is removed. For standard designs this means taking the cage out of the sleeve and tipping it upside down - this is a timely and laborious task.
The present invention has been made in order to overcome the above mentioned disadvantages by providing a filter arrangement which simplifies maintenance and replacement of filter sleeves.
According to the invention there is provided a filter sleeve, for use in a filtering apparatus having a filter plate with one or more openings from which one or more such filter sleeves may extend, said filter sleeve comprising a sleeve member and a base member, said base member being secured to an open end of said sleeve member.
Preferably, the base member is secured or bonded to the sleeve member by means of ultra-sonic welding. Ultra-sonic welding takes several seconds as opposed to several hours for stitching bonding methods, reduces material costs due to the absence of sewing thread, does not require skilled labour and may be combined with the ultra-sonic welding of an entire sleeve.
A key advantage of ultra-sonically welding an entire sleeve is the fact that the possibility of emmissions through stitch holes is eliminated. Furthermore welded seams show good resistance to flexing. Such bonding or welding may be carried out in situ or at the sleeve production plant. The base member may comprise a rigid or semi-rigid material such as rubber or plastics or a flexible material such as fabric. In the case where the base member is secured to the sleeve member at the production plant, it is preferable that the base member comprise a flexible material to enable it to be pushed through the opening in the filter sleeve support band when the filtering apparatus is to be assembled. The base member may extend partially or wholly beyond the end of the sleeve member or may extend within the end of the sleeve member.
With the filter sleeve of the invention, the internal support frame need only support the sleeve member so that the support frame does not require a base section. In particular, a metal cage similar to the conventional type described above, but without the wire gauze base, may be used. The filter support frame or cage simply rests on the base member of the sleeve so that dust can be removed from the bottom of the cage simply by removing the base member.
According to a further aspect of the invention there is provided a filtering apparatus comprising a filter plate and one or more filter sleeves of the invention extending from corresponding openings in the filter plate.
Preferably each such filter sleeve is supported by a corresponding internal frame support having an open end which rests on the base member.
The filter sleeve of the present invention is particularly advantageous where the contaminated air or gas strikes the bottom region of the sleeve at right angles, since the solid base provides protection against wear or abrasion. Where the impacting particles are of an aqueous nature there is increased protection against rust. This is also the case where the filter sleeve base stands in or close proximity to an aqueous medium. The filter sleeve may comprise a polyester needlefelt fabric.
The invention will now be described further by way of example only and with reference to the accompanying drawings in which: Fig. 1 is a sectional view of a filtering apparatus using a filter sleeve of the invention; Fig. 2 is a schematic sectional view showing filter sleeves of the invention in use; Fig. 3 is a side view showing components of a filtering apparatus with a filter sleeve of the invention; Fig. 4 is a side view showing a production process for welding a base member onto a sleeve member; Fig. 5 is a front view showing the apparatus of Fig 4; Fig. 6 is an enlarged side view of the apparatus of Fig. 4; Fig. 7 is an end view of a filter sleeve of the invention; Fig. 8 is a sectional side view of a filter sleeve of the invention; and Figs. 9 and 10 are partial views of the welded sleeve of the invention showing the extent of fusion.
Referring to Fig. 1, a filtering apparatus 1 comprises a filter plate 2 having an aperture 4 from which a filter sleeve 6 is suspended. The filter sleeve is supported in the aperture buy a sleeve support band 8. A wire cage 10 internally supports the sleeve member 12 of the sleeve 6 and rests upon the base member 14 of the sleeve 6. The base member 14 is ultrasonically welded to the sleeve member 12. The free ends 16 of the wire cage resting on the base member are upturned.
In use, unfiltered gas goes in through the filter as indicated by arrows A and the clean, filtered gas is expelled as shown by arrow B. Dust particles 18 accumulate on the base member 14 and are removed by removing the filter sleeve with its base member. The base member 14 may be solid or flexible and is preferably flexible when secured to the sleeve member before insertion through the support band 8.
Referring to Fig. 2, when the contaminated air or gas A strikes the lower region of the sleeve, adjacent the base member 14, the base member provides good resistance to the impacting particles 18 thus giving protection against wear and abrasion.
Referring to Fig. 3, the filter sleeve 6 may be formed by ultrasonically welding the base member 14 to the sleeve member 12 in the same production step as ultrasonically welding the sleeve along joint 20 to form the sleeve member 12.
Figs. 4 to 6 depict one form of production process for welding the base member onto the sleeve member. The sonic generator 22 is the energy supply for the horn 24, typically 1000w, and is supported by a support frame 26 which also supports an anvil 28.
The filter sleeve comprises a sleeve member 12 and a base member 14. The sleeve member 12 is located in a tube (not shown) and the anvil 28 for the ultra-sonic welding device is used to fix the base member 1 4 into an open end of the sleeve member 1 2 at the mouth of the tube. The anvil may for example comprise a 116 mm diameter, 10 mm thick metal disc. The horn 24 may comprise for example a quarter arc of a 116 mm diameter circle.
During the process the horn is lowered to fuse a section, say a quarter section of the circumference of the base and then the tube is rotated to enable the next of the base circumference to be welded, and so on. A second horn (not shown) may be provided on the opposite side of the tube to the first horn to speed up the welding process. Typically the time taken during each individual welding step is 5 - 10 seconds.
In one example, the base member and the sleeve member may comprise polyester, the latter for example may be 540 g/m2 polyester.
Figs. 7 and 8 show the preferred embodiment of welded filter sleeve in more detail where the base member 14 comprises a base section 32 with a peripheral edge section 34 extending therefrom, the base member being located inside the sleeve member 1 2 so that the free end of the peripheral edge section 34 lies in substantially the same plane as the open end of the sleeve member 12. Welding occurs between the peripheral edge section 34 and the open end of the sleeve member 12.
Referring to Figures 9 and 10, in the case of a rigid base such as a 3 mm thick polyester cap, the fused area 30 will typically extend across the end of the sleeve member 12 to the adjacent surface of the peripheral edge section 34. In the case of a fabric base, such as 540 g/m2 polyester needlefelt, the fused area 30 will typically extend across the ends of the sleeve member 12 and the peripheral edge section 34.
It will be appreciated that the present invention is not intended to be restricted to the details of the above embodiments which are described by way of example only.

Claims (8)

1. A filter sleeve for use in a filtering apparatus having a filter plate with one or more openings from which one or more such filter sleeves may extend, said filter sleeve comprising a sleeve member and a base member, said base member being secured to an open end of said sleeve member.
2. A filter sleeve as claimed in claim 1, wherein the base member is secured to the sleeve member by ultra-sonic welding.
3. A filter sleeve as claimed in claim 1 or claim 2, wherein the base member comprises a rigid or semi-rigid material.
4. A filter sleeve as claimed in claim 1 or claim 2, wherein the base member comprises a flexible material.
5. A filter sleeve as claimed in any preceding claim, wherein the base member extends partially or wholly beyond the end of the sleeve member.
6. A filter sleeve as claimed in any of claims 1 to 4, wherein the base member is provided within the sleeve member at one end thereof.
7. A filter apparatus comprising a filter plate and one or more filter sleeves as claimed in any preceding claim.
8. A filter apparatus as claimed in claim 7, wherein each filter sleeve is supported by a frame, the frame having an open end which rests on the base member.
GB9524045A 1995-11-23 1995-11-23 Filter sleeve Withdrawn GB2307426A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
GB9524045A GB2307426A (en) 1995-11-23 1995-11-23 Filter sleeve
PCT/GB1996/002890 WO1997018883A1 (en) 1995-11-23 1996-11-22 Filter sleeve
AU76341/96A AU7634196A (en) 1995-11-23 1996-11-22 Filter sleeve

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB9524045A GB2307426A (en) 1995-11-23 1995-11-23 Filter sleeve

Publications (2)

Publication Number Publication Date
GB9524045D0 GB9524045D0 (en) 1996-01-24
GB2307426A true GB2307426A (en) 1997-05-28

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Family Applications (1)

Application Number Title Priority Date Filing Date
GB9524045A Withdrawn GB2307426A (en) 1995-11-23 1995-11-23 Filter sleeve

Country Status (3)

Country Link
AU (1) AU7634196A (en)
GB (1) GB2307426A (en)
WO (1) WO1997018883A1 (en)

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EP1362628A1 (en) * 2002-05-10 2003-11-19 Mann + Hummel GmbH Filter element for purifying a fluid stream
WO2021229057A1 (en) * 2020-05-15 2021-11-18 Ecosave Packaging Aps Two part container with ultrasonic welded bottom joint, methods of manufacturing thereof and fixtures for ultrasonically welding elements of a two part container
SE2150784A1 (en) * 2021-06-17 2022-12-18 Sila Ab Filter assembly comprising a bag for filtration of particles in gas flow

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DE102023002993A1 (en) 2022-07-21 2024-03-14 PFAFF lndustriesysteme und Maschinen GmbH Method for producing a filter bag device and filter bag device for this purpose

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WO2021229057A1 (en) * 2020-05-15 2021-11-18 Ecosave Packaging Aps Two part container with ultrasonic welded bottom joint, methods of manufacturing thereof and fixtures for ultrasonically welding elements of a two part container
SE2150784A1 (en) * 2021-06-17 2022-12-18 Sila Ab Filter assembly comprising a bag for filtration of particles in gas flow
SE544959C2 (en) * 2021-06-17 2023-02-07 Sila Ab Filter assembly comprising a bag for filtration of particles in gas flow

Also Published As

Publication number Publication date
GB9524045D0 (en) 1996-01-24
WO1997018883A1 (en) 1997-05-29
AU7634196A (en) 1997-06-11

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