MANDREL ASSEMBLY FOR AIR FILTER APPARATUS
First Claim
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1. In an air cleaning device of a type employing an elongated air cleaning web adapted to be progressively advanced longitudinally across an air stream passage from a supply zone to a rewind zone an improved spindle assembly for supporting and rewinding contaminant loaded media into a roll, said spindle assembly comprising:
- a substantially rigid hollow core of generally circular cross-section to provide a support upon which said web may be rewound, said core being arranged to extend transversely across the air cleaning device;
end plates at each end of said core to manipulate said web into a roll, irregularly shaped mandrels inserted in each end of said core to securely fasten said end plates to said core and provide coupling means by which a torque may be transmitted to said spindle each of said mandrels being further defined as having a body portion of increasing taper thereby allowIng it to be easily inserted into one end of said core, and being of irregular cross section, said body portion having at its smallest end a bevel of greater taper than the taper of said body portion which functions to spread open the end of said hollow core as said mandrel is inserted into said core, and diametrically opposed wing portions which are also tapered, thereby stretching said core to enhance the frictional forces between said mandrel and said core to give greater stretching of said core in one radial direction than in a radial direction 90 degrees thereto when said mandrel is inserted in said core.
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Accused Products
Abstract
An automatic air filter and more particularly an automatic air filter of the type employing an elongated air cleaning web adapted to be progressively advanced longitudinally across an air stream passage to clean dirty air as it passes through such passage.
24 Citations
4 Claims
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1. In an air cleaning device of a type employing an elongated air cleaning web adapted to be progressively advanced longitudinally across an air stream passage from a supply zone to a rewind zone an improved spindle assembly for supporting and rewinding contaminant loaded media into a roll, said spindle assembly comprising:
- a substantially rigid hollow core of generally circular cross-section to provide a support upon which said web may be rewound, said core being arranged to extend transversely across the air cleaning device;
end plates at each end of said core to manipulate said web into a roll, irregularly shaped mandrels inserted in each end of said core to securely fasten said end plates to said core and provide coupling means by which a torque may be transmitted to said spindle each of said mandrels being further defined as having a body portion of increasing taper thereby allowIng it to be easily inserted into one end of said core, and being of irregular cross section, said body portion having at its smallest end a bevel of greater taper than the taper of said body portion which functions to spread open the end of said hollow core as said mandrel is inserted into said core, and diametrically opposed wing portions which are also tapered, thereby stretching said core to enhance the frictional forces between said mandrel and said core to give greater stretching of said core in one radial direction than in a radial direction 90 degrees thereto when said mandrel is inserted in said core.
- a substantially rigid hollow core of generally circular cross-section to provide a support upon which said web may be rewound, said core being arranged to extend transversely across the air cleaning device;
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2. The apparatus of claim 1 wherein said mandrel additionally comprises a support and coupling shelf interior of said body portion lying in substantially the same plane as the plane defined by said diametrically opposed wing portions to give additional radial strength to said mandrel and provide coupling means for the transmission of a torque to said spindle assembly.
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3. The apparatus of claim 1 wherein said body portion of each of said mandrels additionally comprises diametrically opposed flat portions to enhance the frictional forces between said mandrels and said core.
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4. The apparatus of claim 1 wherein said rigid hollow core is comprised of a light weight fabricating metal.
Specification
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Current AssigneeAmerican Air Filter Co., Inc. (Daikin Industries Ltd)
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Original AssigneeAlan E. Revell, Wilson A. Welch
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InventorsWelch, Wilson A., Revell, Alan E.
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Primary Examiner(s)Talbert, Jr., Dennis E.
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Assistant Examiner(s)Greenblum, Neil F.
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Application NumberUS05/221,550Time in Patent Office669 DaysField of Search55/351,352,353,354,290 242/46.3,55.1,55.17,55.55,68.1,74.1,68.3,68.4,68.5,68.6,71.8,72,72.1,75.2,75.3 113/116DUS Class Current55/354CPC Class CodesB01D 46/18 Particle separators, e.g. d...
