| Patent Number |
Title Of Patent |
Date Issued |
| 6398839 |
Pleated fluid filter medium frame |
June 4, 2002 |
| A self supporting pleated fluid filter medium having different fibers to provide pleats sufficiently self supporting to maintain pleated form during fluid filter treatment, the invention further including low melt fiber and an optional support frame and a method of making such pleated |
| 6267832 |
Method and apparatus for automated manufacture of unit filters |
July 31, 2001 |
| A method and apparatus for continuously manufacturing filter units; each unit including a flow-through filter medium support frame with at least one sheet of filter medium extending across the flow-through opening of each unit with the edges thereof welded to the peripheral side edges of |
| 6254653 |
Pleated fluid filter medium blend |
July 3, 2001 |
| A self supporting pleated fluid filter medium having different fibers to provide pleats sufficiently self supporting to maintain pleated form during fluid filter treatment, the invention further including low melt fiber and an optional support frame and a method of making such pleated |
| 6033454 |
Air filter assembly |
March 7, 2000 |
| An air filter has a generally rectangular frame having surfaces defining generally a plane, and a pair of parallel side rails and a pair of parallel end rails along outer edges of the plane-defining surfaces, the rails flaring outboardly at an obtuse angle from the plane when the frame |
| 6022305 |
Pleating apparatus |
February 8, 2000 |
| A system for pleating a continuous strip of foldable material including feeding the strip of foldable material between adjacent flights of cooperatively positioned endless conveyors having pleat folding arms pivotally associated therewith which are alternatively and interfittingly po |
| 5976427 |
Melt blowing method for forming layered webs of filter media |
November 2, 1999 |
| A method, die apparatus and product wherein a layered web of melt blown fibrous filter media is produced by a unitary die including several die sources with facing layers of the fibrous filter media being attenuated by opposed fluid streams at preselected included angles and with the fib |
| 5976209 |
Melt blown product formed as a fibrous layered web of filter media |
November 2, 1999 |
| A product wherein a layered web of melt blown fibrous filter media is produced by a unitary die including several die sources with facing layers of the fibrous filter media being attenuated by opposed fluid streams at preselected included angles and with the fiber layers being free from |
| 5968373 |
Filter arrangement having at least two successive layers having predetermined spacing and its me |
October 19, 1999 |
| A filter apparatus and method wherein successive layers of filter medium are spaced apart from each other a preselected distance to create a substantially direct, in-line through-flow void space therebetween evaluated upon the porosity and thickness of the successive filter mediums, |
| 5928396 |
Pocket filter and method and apparatus for making the same |
July 27, 1999 |
| A filter bag assembly and method and machinery to form the same wherein spaced opposed filter bag panels are connected together by transversely extending preselectively sized binder strips fastened selectively at opposed ends to the spaced filter panels to restrain outward inflation of |
| 5891482 |
Melt blowing apparatus for producing a layered filter media web product |
April 6, 1999 |
| A die apparatus wherein a layered web of melt blown fibrous filter media is produced by a unitary die including several die sources with facing layers of the fibrous filter media being attenuated by opposed fluid streams at preselected included angles and with the fiber layers being free |
| 5817990 |
Wall structure for sound attenuating apparatus |
October 6, 1998 |
| A sound attenuating apparatus for noise bearing fluid streams wherein elongated perforated wall forming panel sheets include integrally formed indentations extending along a direction transverse the direction of the fluid stream to provide strength and stiffeners for the perforated panel |
| 5803954 |
Particulate filter collector arrangement and method |
September 8, 1998 |
| A unique pulse-jet cartridge type particulate collector structure and method wherein horizontally disposed particulate filter cartridges are suspendedly disposed in a particulate separation chamber defined by an outer wall so that opposite ends of the suspended particulate filter car |
| 5744036 |
Pleated filter arrangement |
April 28, 1998 |
| A pleated filter medium arrangement including a sheet of pleated porous filtering media nestingly engaged between adjacent pleats by a pleated sheet of thermobondable plastic screening with preselected facing opposite portions of the screening being heat bonded together. |
| 5725812 |
Melt blowing apparatus and method for forming a fibrous layered web of filter media including a |
March 10, 1998 |
| An apparatus and method for distributing pressurized fiber attenuating fluid through a melt blowing multi-headed die body uniformly and contaminant filtered with a minimum of energy loss before reaching the fluid attenuating outlets of the die body. |
| 5679931 |
Sound attenuating apparatus and method of forming the same |
October 21, 1997 |
| A sound attenuating apparatus and method for forming the same including stacking selectively sized sheets of sound attenuating materials and fastening the same to form elongated, perforated sound attenuating flow-through passages which are structurally connected by means of mechanica |
| 5672188 |
High capacity filter media |
September 30, 1997 |
| A fluid filter arrangement including layered filter media capable of successively filtering varying sized particulate matter from a treated fluid stream with each layer of the layered filter media having a substantially equal terminal pressure drop thereacross. |
| 5667544 |
Extended life filter apparatus |
September 16, 1997 |
| A particulate filter for a fluid stream being of preselected thickness with progressively increasing fibrous density from the upstream face toward the downstream face, the filter having a transversely and uniformly extending planar sheet-like adhesive barrier at a preselected location an |
