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| Number | Title | Issue Date |
| 7404789 | Machine and method for making filter bags for infusion products A machine (1) for making filter bags (4) of tetrahedral shape for infusion products comprises a revolving conveyor drum (15) driven by a first drive shaft (16) to feed a web (5) of filter paper along a path (P) on which there are p... | 07/29/2008 |
| 7318800 | Pleating apparatuses A pleating apparatus comprises a support surface, first and second pleating surfaces, and a driver for compressing a portion of a filter material between the first and second pleating surfaces to form a pleat, where at least one of the pleating surfaces is curved or... | 01/15/2008 |
| 7261818 | Method for the fabrication of a pleated filter A filter is made by the folding of a filter media to pleats after the application of strings of glue thereon and the glue serves as distance elements and fixing for the filter media. The glue contains an expandable filler, that when heated expands to a larger size t... | 08/28/2007 |
| 7204794 | Machine and method for making filter bags for infusion products A machine (1) for making filter bags (4) of tetrahedral shape for infusion products comprises a revolving conveyor drum (15) driven by a first drive shaft (16) to feed a web (5) of filter paper along a path (P) on which there are p... | 04/17/2007 |
| 7115085 | Method and apparatus for incorporating objects into cigarette filters Cigarette filter rods having individual objects positioned at predetermined intervals therein are prepared by transferring the individual objects from a rotating horizontal pan to a rotating vertical wheel and then depositing the object into a web of filter tow. Eac... | 10/03/2006 |
| 7083564 | Pleating methods A pleating method comprises disposing a filter material on a support surface and compressing a portion of the filter material between first and second pleating surfaces to form a pleat, where at least one of the pleating surfaces is curved or extends at an acute ang... | 08/01/2006 |
| 7074170 | Method and apparatus for making cigarette filters with a centrally located flavored element A filter making apparatus includes a positioning device having a passageway therethrough, with the passageway guiding a continuous flavor element such as a continuous strand of textile material from an inlet of the passageway to an outlet of the passageway. A liquid... | 07/11/2006 |
| 6761589 | Patch plug design and methods for use thereof A patch plug is provided that facilitates field installations thereof, e.g., using conventional equipment such as a conventional punch tool. Preferred patch plugs according to the present disclosure include a cover and a housing, each of which includes a hinge membe... | 07/13/2004 |
| 6752889 | Contoured layer channel flow filtration media A filtration media array is provided having at least one contoured polymeric film layer having surface structures. The film layers may be configured as a stack that has the contoured film layer defining a plurality of ordered inlet openings through a face of the sta... | 06/22/2004 |
| 6740025 | Method of folding a gas bag for a vehicle occupant restraint system and folded gas bag A method of folding a gas bag for a vehicle occupant restraint system comprises the following steps: first, the gas bag is unfolded between a base and an opposing surface. A spacing is provided between the base and the opposing surface, which corresponds to a height... | 05/25/2004 |
| 6524479 | Pleated filter element with melt-bonded support rod and method of making same A filter element 10 for purifying fluids having a filter medium 11, an enclosure member 12, and a rod 13. The filter medium 11 has folds 14, which may be zigzag-shaped, and which define a fold height 15 and a pleat surface 16. At right angles to folds 14 ... | 02/25/2003 |
| 6113784 | Filter A filter includes a cylindrical pleated filter element having a longitudinal axis, an inner and outer periphery, first and second end surfaces, and a plurality of longitudinal pleats. First and second end elements are sealingly arranged with the first and... | 09/05/2000 |
| 6090032 | Apparatus for folding paper An apparatus for sequentially forming folds in a sheet of paper which is continuously moving substantially in a single plane. A first fold is formed in the center of the continuously-moving sheet of paper and subsequent pairs of folds are sequentially for... | 07/18/2000 |
| 6048298 | Apparatus for forming spiral pleated filter cartridges A method is disclosed for forming a filter cartridge which includes the steps of providing a cylindrical filter element having a plurality of radially extending longitudinal pleats, engaging an outer periphery of the cylindrical filter element along a sub... | 04/11/2000 |
| 6022305 | Pleating apparatus 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 altern... | 02/08/2000 |
| 5919122 | Method of manufacturing filters A method for the manufacture of filters in which a filter material in the rm of a continuous web is pre-embossed, perforated with a laser beam, and then pleated. The pleated filter element is fixed in a subsequent operation in an apparatus and the perfora... | 07/06/1999 |
| 5882288 | Apparatus and method for forming spiral pleated filter cartridges A method is disclosed for forming a filter cartridge which includes the steps of providing a cylindrical filter element having a plurality of radially extending longitudinal pleats, engaging an outer periphery of the cylindrical filter element along a sub... | 03/16/1999 |
| 5876601 | Pleated filter having a helically wrapped septum to tension the filter A filter includes a cylindrical filter element having a longitudinal axis, first and second end surfaces, and a plurality of longitudinal pleats. Each of the pleats has a pair of legs with first and second surfaces. The pleats are in a laid-over state in ... | 03/02/1999 |
| 5836861 | Filter assembly apparatus An apparatus for assembling a filter having a peripheral frame and at least one filter media component includes a continuous conveyor for feeding a plurality of filter frames, in succession, to a plurality of workstations, each filter frame having a close... | 11/17/1998 |
| 5804073 | Method of making a pleated structure having a pleated memory shape and the filter media made therefrom A method for making a pleated structure having a pleated shape memory includes providing an elongated material having a longitudinal axis; pleating the material to form a pleated structure having a plurality of substantially parallel pleats substantially ... | 09/08/1998 |
| 5770075 | Beverage filter A beverage filter formed of porous paper, or other paper-like filter material for placement in the ground beverage container of a beverage brewing apparatus, such as a percolating coffee pot, in which the filter is graduated by being provided with indicia... | 06/23/1998 |
| 5695441 | Filter plug feeding apparatus for a filter cigarette manufacturing machine A filter plug feeding apparatus comprises a pair of hoppers in which charcoal and plain filter rods are stored, a pair of hopper drums for delivering charcoal and plain filter rods from the hoppers, respectively, the hoppers being able to discharge the fi... | 12/09/1997 |
| 5690765 | Methods of assembling a filter A filter includes a cylindrical filter element having a longitudinal axis, first and second end surfaces, and a plurality of longitudinal pleats. Each of the pleats has a pair of legs with first and second surfaces. The pleats are in a laid-over state in ... | 11/25/1997 |
| 5543047 | Filter with over-laid pleats in intimate contact A filter includes a cylindrical filter element having a longitudinal axis, first and second end surfaces, and a plurality of longitudinal pleats. Each of the pleats has a pair of legs with first and second surfaces. The pleats are in a laid-over state in ... | 08/06/1996 |
| 5472606 | Self-supporting, pleated, spirally wound filter A coreless filter comprises a pleated, spirally wound loop of material disposed in a housing. The loop includes a layer of filter material, such as a membrane filter, interposed between two support layers.... | 12/05/1995 |
| 5460721 | Helical wound tube A helically wound tube made of at least two sheets of preperforated flat roll paper material. Each sheet is helically wound in edge abutting relation such that one longitudinal edge of the sheet abuts the other longitudinal edge of the sheet to form a rid... | 10/24/1995 |
| 5429580 | Filter assembly apparatus Apparatus for use in a filter assembly operation wherein filter components are seated within a filter frame such that the frame has a generally upstanding leading flap, side flaps and a trailing flap. The apparatus includes side flap engaging members adap... | 07/04/1995 |
| 5403482 | Self-supporting, pleated, spirally wound filter and the corresponding process of making A coreless filter comprises a pleated, spirally wound loop of material disposed in a housing. The loop includes a layer of filter material, such as a membrane filter, interposed between two support layers.... | 04/04/1995 |
| 5370597 | Method for manufacturing antimicrobial vacuum cleaner bag A vacuum cleaner bag is treated with a dual component, antimicrobial composition which reduces harmful bacteria and fungi safely and effectively. The vacuum cleaner bag is used on an upright vacuum cleaner and includes a porous cloth body which is treated... | 12/06/1994 |
| 5322700 | Tea bag with strengthened centerfold A double-chamber tea bag has a centerfold that is crimped by squeezing it between a toothed wheel and a plain wheel and a headfold in which the front chamber has a flap that folds over the part of the end of the front chamber between triangular folds at e... | 06/21/1994 |
| 5273560 | Filter element and method for producing the same A filter element and a method for manufacturing the filter element is disclosed wherein filter paper is folded in a zigzag manner to form a filter material, and a circumferential portion of the filter material is fastened by an adhesive so as to fasten th... | 12/28/1993 |
| 5230455 | Self-supporting filter units A filter unit is made of two portions (14) of rigid corrugated material secured together along lands (50,52) extending parallel with the corrugations and, if desired, intermediate them, and also along lands (54) formed along one end of the corrugations, t... | 07/27/1993 |
| 5230726 | Spiral wrapped gas generator filter An improved method for the continuous fabrication of filter units for use in automotive air bag inflators by spirally winding a hollow cylindrical core, at least one filter layer, and an outer layer to form a continuous spirally wound filter unit. The con... | 07/27/1993 |
| 5178760 | Fluid filter construction with a corrugated and tapered filter strip A filter device including a separable housing and cannister-like means, with the improved filter element retained in the latter. The filter element being an elongated tapered strip having a predetermined transverse dimension at its midsection generally eq... | 01/12/1993 |
| 5174896 | Filtering system utilizing rotational flow and angled pleated filter media and method for making slanted pleated filter media A filter cartridge for use in a fluid filtering system, constructed to induce rotational flow in the unfiltered fluid, includes a pleated filter sleeve in which the individual sleeves are slanted relative to the sleeve circumference in a direction opposit... | 12/29/1992 |
| 5167740 | Method of making a filter insert of nonwoven material in the form of a pleated pack A filter insert of nonwoven material in the form of a pleated pack is self-supporting and consists of thermally weldable nonwoven (1). Each of the two outside ends (3) of the pleated pack (2) is hemmed by the nonwoven material (1) forming the pleats, whic... | 12/01/1992 |
| 5120296 | Method and apparatus for forming filter element A tape like material including synthetic resin for a filter element is bent into a corrugated pattern while the material is passed between pairs of forming and cutting rollers. Since pairs of cutters are provided within the rollers and since guide plates ... | 06/09/1992 |
| 5078872 | Combined strainer and pour spout apparatus A disposable, combined strainer and pour spout integrates into one apparatus the combination of means for pouring and straining utilizing a simple device that may be readily attached to or integrated with a disposable bucket or tub for holding paints or o... | 01/07/1992 |
| 5071555 | Filter folded in a zig-zag configuration An air filter comprising a sheet of filter material folded in a zig-zag configuration. A hardenable material is dispensed in a flowable state onto the sheet. The hardenable material has a varying thickness such that upon hardening, it holds the folds of t... | 12/10/1991 |
| 5009633 | Method of manufacturing an outer vacuum cleaner bag for an upright cleaner A method of manufacturing the outer cloth bag for an upright vacuum cleaner in which the bag material of a predetermined width is unwound from a reel an fed through guides, material folders and a double headed sewing machine. At the same time zipper chain... | 04/23/1991 |
