AU653624B2 - Filter belt - Google Patents
Filter belt Download PDFInfo
- Publication number
- AU653624B2 AU653624B2 AU22005/92A AU2200592A AU653624B2 AU 653624 B2 AU653624 B2 AU 653624B2 AU 22005/92 A AU22005/92 A AU 22005/92A AU 2200592 A AU2200592 A AU 2200592A AU 653624 B2 AU653624 B2 AU 653624B2
- Authority
- AU
- Australia
- Prior art keywords
- filter
- length
- track
- belt
- filter belt
- 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.)
- Ceased
Links
Landscapes
- Filtering Materials (AREA)
Description
53Regulation 3.2 Regulation 3.2 1
AUSTRALIA
PATENTS ACT 1990 COMPLETE SPECIFICATION FOR A STANDARD PATENT
ORIGINAL
r r 4
S
S.
Name of Applicant: SCAPA GROUP PLC Actual Inventors: IAi4Mj-TQ. znd SHYAM KUMARAN Address for Service: Invention title: R K MADDERN ASSOCIATES, 345 King William Street, Adelaide, South Australia, Australia FILTER BELT Details of Associated Provisional Application No: PK 7993 dated 28th August, 1991 The following statement is a full description of this invention, including the best method of performing it known to us.
la FILTER BELT This invention relates primarily to filter belts and to a method of making filter belts.
Known drum filter belts comprise a rubber edge track which runs in guides to keep the filter cloth running perfectly straight. The rubber edge track is attached to a fabric reinforcement by means of several rows of stitching.
The fabric reinforcement is also secured to the filter cloth.
The stitching connecting the rubber edge track to the fabric reinforcement tends to wear in the regions where it is 0 prominent and the perforations made by the sewing needle are a frequent cause of failure to the rubber component. Also time is taken in producing these filter belts.
The present invention has been made from a consideration of these problems.
According to a first aspect of the present invention there is provided a filter belt comprising a length of filter !i cloth, an elongated track made of a thermoplastic elastomeric material including an alkene which softens under heat in order to provide adhesion, said track being disposed adjacent at least one edge of said length of filter cloth and at least one piece of reinforcement fabric heat welded at one edge thereof to said track and secured to said length of filter cloth so as to connect said track to said length of filter cloth and form said filter belt.
According to a second aspect of the present invention there is provided a method of making a filter belt, said filter belt comprising a length of filter cloth, an elongated track made of a thermoplastic elastomeric material including an alkene which softens under heat in order to provide adhesion, said track being disposed adjacent at least one edge of said length of filter cloth, said filter belt further comprising at least one piece of reinforcement fabric secured to the said track and secured to said length of filter cloth so as to connect said track to said length of filter cloth and form said belt, said method comprising the step of heating the elastomeric thermoplastic material so as to heat weld the said material to the reinforcement fabric.
In a preferred embodiment of the invention the ~elastomeric thermoplastic material comprises rubber. The r elastomeric thermoplastic material is preferably vulcanised "to confer temperature stability upon the product. The material preferably has an olefin content which softens under .i heat so as to impart the degree of adhesion sufficient to enable the fabric to be permanently bonded to the material.
*Santroprene (Trade Mark of Monsanto) material is preferred.
The fabric may comprise a filter cloth secured to a 0 second fabric. The filter cloth may be secured to the second fabric by for example stitching or welding.
The belt of the present invention should have a longer working life than known filter belts because of the absence of stitching. What is more the time taken to assemble a belt 16 to 17m long is reduced by about 25%. The presentation of the product is also much better than known filter belts.
Contrary to the general teaching of the art it has been found that the welding process does not degenerate the fabric 3 and that the welded joint is sufficiently strong to support a load on the belt.
In order that the present invention may be more readily understood a specific embodiment thereof will now be described by way of example only with reference to the single accompanying drawing.
Referring to the drawing a filter belt 10, only part of which is shown, comprises a length of filter cloth 11 secured to a second reinforcement fabric by, for example stitching or welding. An edge of the reinforcement fabric 12 is welded to a Santroprene (Trade Mark) rubber edge track 13.
The pre-vulcanised edge tcack 13 is welded to the fabric 12 using a jet of hot air from a Pfaff machine. The speed of travel of the components through the machine is about 6M/min with an air temperature of between 500 to 550°C. The olefin content of the rubber edge track 13 softens under heat and adheres the edge track 13 to the fabric 12.
It is to be understood that the above described embodiment is by way of illustration only. Many modifications and variations are possible.
Claims (11)
1. A filter belt comprising a length of filter cloth, an elongated track made of a thermoplastic elastomeric material including an alkene which softens under heat in order to provide adhesion, said track being disposed adjacent at least one edge of said length of filter cloth and at least one piece of reinforcement fabric heat welded at one edge thereof to said track and secured to said length of filter cloth so as to connect said track to said length of filter cloth and form said filter belt. JO
2. A filter belt as defined by claim 1, wherein said at least one piece of reinforcement fabric is secured to said length of filter cloth by stitching.
3. A filter belt as defined by claim 1, wherein said at least one piece of reinforcement fabric is secured to said 15 length of filter cloth by welding.
4. A filter belt as defined by claim 1, wherein at least C* two pieces of reinforcement fabric connect said track to said length of filter cloth.
5. A filter belt as defined by claim 4, wherein said at least two pieces of reinforcement fabric overlie oppositely oriented surfaces of both said track and said length of filter cloth.
6. A filter belt as claimed in claim 1, wherein the elastomeric thermoplastic material comprises rubber.
7. A filter belt as claimed in claim 1, wherein the elastomeric thermoplastic material is vulcanized.
8. A filter belt as claimed in claim 1, wherein the elongated track forms at least one edge of the filter belt.
9. A filter belt substantially as described herein with reference to the accompanying drawing.
10. A method of making a filter belt, said filter belt comprising a length of filter cloth, an elongated track made of a thermoplastic elastomeric material including an alkene which softens under heat in order to provide adhesion, said track being disposed adjacent at least one edge of said length of filter cloth, said filter belt further comprising at least one piece of reinforcement fabric secured to the .said track and secured to said length of filter cloth so as to connect said track to said length of filter cloth and form S said belt, said method comprising the step of heating the elastomeric thermoplastic material so as to heat weld the said material to the reinforcement fabric.
11. A method as claimed in claim 10 for making any of the filter belts of claims 1 to 9. 24 DATED this 26th day of July 1994 SCAPA GROUP PLC By its Patent Attorneys R K MADDERN ASSOCIATES PI ABSTRACT FILTER BELT A filter belt (10) comprises an edge track (13) made from rubber, but having an olefin content which softens under heat to facilitate welding to a fabric. The rubber is welded to one edge of a length of fabric The opposite edge of the fabric (12) is secured to a filter cloth (11). *i f
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AU22005/92A AU653624B2 (en) | 1991-08-28 | 1992-08-28 | Filter belt |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AUPK7993 | 1991-08-28 | ||
| AUPK799391 | 1991-08-28 | ||
| AU22005/92A AU653624B2 (en) | 1991-08-28 | 1992-08-28 | Filter belt |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| AU2200592A AU2200592A (en) | 1993-05-13 |
| AU653624B2 true AU653624B2 (en) | 1994-10-06 |
Family
ID=25618467
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| AU22005/92A Ceased AU653624B2 (en) | 1991-08-28 | 1992-08-28 | Filter belt |
Country Status (1)
| Country | Link |
|---|---|
| AU (1) | AU653624B2 (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3327839A (en) * | 1965-07-08 | 1967-06-27 | Ajem Lab Inc | Conveyor apparatus |
| GB1169360A (en) * | 1965-11-16 | 1969-11-05 | Marshall D A G | Improvements in or relating to Filters |
| GB1392882A (en) * | 1971-07-14 | 1975-05-07 | Sparkler Mfg Co | Apparatus for filtering fluids |
-
1992
- 1992-08-28 AU AU22005/92A patent/AU653624B2/en not_active Ceased
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3327839A (en) * | 1965-07-08 | 1967-06-27 | Ajem Lab Inc | Conveyor apparatus |
| GB1169360A (en) * | 1965-11-16 | 1969-11-05 | Marshall D A G | Improvements in or relating to Filters |
| GB1392882A (en) * | 1971-07-14 | 1975-05-07 | Sparkler Mfg Co | Apparatus for filtering fluids |
Also Published As
| Publication number | Publication date |
|---|---|
| AU2200592A (en) | 1993-05-13 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MK14 | Patent ceased section 143(a) (annual fees not paid) or expired |