Polyester bag filter
AssigneePall Corporation
InventorsFrank A. Fiumano, Colin F. Harwood, Carl H. Meyers
Life of this patent
Estimating the term…
Abstract
A bag filter comprising at least one sheet of a polyester filter medium, preferably a polyester high dirt capacity filter medium, having a graded pore structure which has been formed into a bag configuration with an opening, an inside surface, an outside surface, and at least one seam formed at adjoining filter medium portions which have been sewn together and optionally sealed with a thermoplastic tape that has been heat-sealed to the adjoining filter medium portions.
Claims19
A bag filter comprising at least one sheet of a filter medium comprising a melt-blown fibrous web of polyester fibers intertwined and layered on a porous polyester substrate and having a graded pore structure formed into a bag configuration with an opening, an inside surface, an outside surface, and at least two adjoining portions sewn together with thread to form a seam.
A method of processing a fluid, which method comprises a fluid with a bag filter comprising at least one sheet of a filter medium comprising a melt-blown fibrous web of polyester fibers intertwined and layered on a porous polyester substrate and having a graded pore structure formed into a bag configuration with an opening, an inside surface, an outside surface, and at least two adjoining portions sewn together with thread to form a seam.
A bag filter comprising (a) one sheet of a filter medium comprising a melt-blown fibrous web of polyester fibers intertwined and layered on a porous polyester substrate and having a graded pore structure formed into a bag configuration with an opening, an inside surface, an outside surface, and at least two adjoining portions with a polyester binder strip therebetween and sewn together with polyester thread to from a seam and (b) a collar comprising a polyester copolymer sewn with polyester thread onto said opening of said bag-configured filter medium with one seam at the junction of said collar and said filter medium.
Dependencies are inferred from the claim text.