Co-molded and cured filter cartridge end using different durometer plastisols
a filter cartridge and durometer technology, applied in the field of co-molded filters, can solve the problems of adding cost and time to the manufacture of filter cartridges, and achieve the effect of better support of filter media
Inactive Publication Date: 2007-08-09
PUROLATOR ADVANCED FILTRATION
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Benefits of technology
[0008] In one embodiment, the edge of the filter media is embedded into the second plastisol material. The second plastisol material is arranged between the planes, and the first plastisol material extends axially away from the second surface. This arrangement of the first and second plastisol materials better ensures that the materials do not mix with one another during dispensing and curing. The arrangement of the first and second plastisol materials provides a generally uniform rigidity across the width of the end disc ensuring better support of the filter media.
Problems solved by technology
Separately bonding a gasket to the metal end discs adds cost and time to the manufacture filter cartridge.
Method used
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Embodiment Construction
[0018]FIG. 1 illustrates one prior art filter cartridge for fluid filters. The filter cartridge 12 is arranged within a filter housing 10, which is depicted schematically. The filter housing 10 includes filter structure 14 against which the filter cartridge 12 must seal to prevent fluid from bypassing the filter cartridge 12. The filter cartridge 12 typically includes metal end discs 16 that retain a filter media or element 18. Adhesive 20 is arranged on one side of the end discs for securing edges 21 of the filter media 18 to the end discs 16. The filter media 18 is a pleated paper filter element in the example shown.
[0019] To better ensure that the filter cartridge seals against the filter structure 14, gaskets 22 are bonded to sides of the end disc 16 opposite the edges 21. The arrangement shown in FIG. 1 is costly since it requires separately adhering a gasket to each end disc. Further, the metal end discs cannot be incinerated when disposing of the filter.
[0020] An example in...
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Abstract
A filter cartridge includes a filter media having opposed edges. Annular end discs include first and second surfaces defined by spaced apart planes. The end discs has an integrated gasket, and is formal from includes first and second plastisol materials that have different durometers. The durometer of the second plastisol material makes it more rigid than the first plastisol material. The first plastisol material provides a flexible gasket. During manufacture, each edge of the filter media is embedded into the second material on an end disc. The second plastisol material is arranged between the planes, and the first plastisol material extends axially away from the second surface.
Description
[0001] This application is a divisional of pending U.S. patent application Ser. No. 10 / 991,747, filed Nov. 18, 2004, the disclosure of which is expressly incorporated by reference herein.BACKGROUND OF THE INVENTION [0002] This invention relates to a filter cartridge for use in a fluid filter and to a method of manufacturing the same. [0003] Filter cartridges are used in filter housings for filtering fluids such as oil and fuel. A filter cartridge typically includes spaced apart metal end discs with a filter media or element arranged between the end discs. Edges of the filter element, which may be a pleated paper element, are bonded to the end discs with an adhesive such as plastisol. [0004] The surfaces of the end disc opposite of the filter element seal against the filter housing to prevent fluid from bypassing the filter element. The filter housing is typically constructed of metal so that there is a metal-to-metal seal between the filter cartridge end discs and the filter housing...
Claims
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IPC IPC(8): E04B1/00
CPCB01D29/111B01D2201/34B01D2201/293
Inventor WRIGHT, ALLEN B.
Owner PUROLATOR ADVANCED FILTRATION