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| Number | Title | Issue Date |
| 7799261 | Needle-to-needle electrospinning The disclosure relates to a method and apparatus for coating a medical device. The method includes providing an electrospinning apparatus and simultaneously electrospinning at least one solution onto a first surface and an opposing second surface. The apparatus comp... | 09/21/2010 |
| 7282117 | Cellulosic fiber composites using protein hydrolysates and methods of making same Cellulosic fiber composites and finished cellulosic fiber composite articles are provided. The cellulosic fiber composites comprise cellulosic material and a resin binder. The resin binder comprises vegetable protein hydrolysates and a synthetic resin. The synthetic... | 10/16/2007 |
| 7276271 | Polymer fiber tubular structure having kinking resistance An apparatus for forming a tubular structure from a liquefied polymer, the apparatus comprising: (a) a dispenser for dispensing the liquefied polymer; (b) a precipitation electrode being at a first potential relative to the dispenser, the precipitation electrode bei... | 10/02/2007 |
| 7226880 | Breathable, extensible films made with two-component single resins A film formed from a two-component single resin including two components, not blended or co-polymerized, but inter-polymerized. The two components may have different densities and/or different melt indexes, with the resulting resin having properties of a blend of th... | 06/05/2007 |
| 7086846 | Electro spinning of submicron diameter polymer filaments An electro spinning process yields uniform, nanometer diameter polymer filaments. A thread-forming polymer is extruded through an anodically biased die orifice and drawn through an anodically biased electrostatic field. A continuous polymer filament is collected on ... | 08/08/2006 |
| 7070836 | Filter materials comprising a bipolar coating The inventions directed to a process for producing non-woven fabric materials in which nano- and/or microfibers are produced by an electrostatic spinning process from a polymer melt or a polymer solution and deposited to form a non-woven fabric. A carrier material i... | 07/04/2006 |
| 6966762 | Device for opening and distributing a bundle of filaments when producing a nonwoven textile web The invention concerns a device for opening and distributing a bundle of filaments when producing a nonwoven textile web by a technique which consists in: extruding melted organic polymer through a die perforated with holes, so as to form a bundle or curtain of fila... | 11/22/2005 |
| 5935303 | Electrostatic filter An electrostatic filter includes a fibrous component including a mixture of wool and synthetic fibers and a resinous component including a perfluoroalkyl acrylate copolymer resin and a p-tert-butylphenol formaldehyde resin, which resinous component is adh... | 08/10/1999 |
| 5840240 | Method of making a silicone composite vascular graft A silicone/DACRON polyester composite vascular graft especially well suited as an arteriovenous (A-V) graft fistula for dialysis application. The graft has the ability to seal around needle puncture holes without externally applied pressure, excellent ant... | 11/24/1998 |
| 5707580 | Flash-spinning process An improved apparatus and process for flash-spinning plexifilamentary film-fibrils are provided in which a static mixing device is provided in the conduit through which the polymer and spin agent are provided to the spin orifice of the flash spinning appa... | 01/13/1998 |
| 5643524 | Corona charging of flash spun plexifilamentary film-fibril webs in poor charging environments This invention relates to flash spinning a plexifilamentary film-fibril strand and laying it down into sheet material including the step of subjecting the strand to an electrostatic charge. The invention is particularly focused on cleaning, and maintainin... | 07/01/1997 |
| 5568652 | Rapid setting compositions and method of making and using same A method of making a homogeneous formable mixture involves simultaneously mixing organic binder which can be cellulose ethers, cellulose ether derivatives, and combinations of these, powder material capable of being formed into a body when combined with t... | 10/22/1996 |
| 5558830 | Wand purging for electrostatic charging system in flash spinning process This invention relates to a method and apparatus for sweeping dust and debris from the needles of a wand which is for applying an electrostatic charge to a plexifilamentary film-fibril web. The needles of the wand tend to acquire dust and debris from the ... | 09/24/1996 |
| 5311884 | Process for making a piezoelectric biomedical device A piezoelectric medical device and a process for preparing the same by electrostatically spinning a copolymer of vinylidene fluoride and a second fluorinated hydrocarbon, and collecting the spun fibers on a suitable receiver is disclosed.... | 05/17/1994 |
| 5296172 | Electrostatic field enhancing process and apparatus for improved web pinning Process and apparatus for improving web pinning and uniformity in a fibrous web forming operation. The improvements are achieved by imposing an auxiliary electrostatic field above the fibrous web as it is pinned along a moving collection surface. An auxil... | 03/22/1994 |
| 5230800 | Scrim inserted electrostatic fibrous filter web Provided is a nonwoven web of electrically charged fibers needle-punched to a scrim support. This web provides a filter medium having increased uniformity in pressure-drop, basis weight and filtration performance.... | 07/27/1993 |
| 5227172 | Charged collector apparatus for the production of meltblown electrets The apparatus of the present invention employs a collector drum with an electrically charged surface for use in preparing electrically charged meltblown fibrous webs. The apparatus may be used as a primary charging system or, alternatively, with other cha... | 07/13/1993 |
| 5143767 | Processes for preparing electret filters Provided herein is a process for preparing an electret filter which comprises feeding a non-woven fabric composed of an electrically charged web of synthetic fibers through a nip of co-operating embossing and flat rolls under pressure and at a temperature... | 09/01/1992 |
| 5122048 | Charging apparatus for meltblown webs Electrically charged meltblown webs are formed by convergingly discharging electrically charged hot air onto a row of extruded polymer fibers to contact the fibers thereby (i) attenuating and stretching the fibers and (ii) imparting an electric charge to ... | 06/16/1992 |
| 5064577 | Method of spinning optical fibers A method of forming an optical fiber defining an axis, the fiber having a dipolar dopant wherein a substantial number of the dipoles of the dopant are oriented in essentially the same direction along the axis of the fiber; the method comprising the steps ... | 11/12/1991 |
| 5059107 | Apparatus for producing annular fiber aggregate An apparatus for producing annular fiber aggregate includes: a container including an inner cylinder and an outer cylinder disposed concentrically, whereby forming an upright cylindrical space between the inner cylinder and the outer cylinder; at least a ... | 10/22/1991 |
| 5051159 | Non-woven fiber sheet and process and apparatus for its production A process apparatus for producing a non-woven, especially a non-woven electret, fiber sheet provides for directing the non-woven fibers at a collecting surface and into an electric field between at least one electrode and the collecting surface. This proc... | 09/24/1991 |
| 5045248 | Process for making a non-woven sheet A process to detect the loss of a continuous spun web of plexifilament fibers exiting a forwarding apparatus depends on the manner in which the filament oscillate in a cross machine direction prior to depositing onto a collecting surface. The loss of thes... | 09/03/1991 |
| 5024789 | Method and apparatus for manufacturing electrostatically spun structure Electrostatic spinning method for producing tubular fibrous structures from fiberizable material wherein the fiberizable material is collected on an electrostatically charged mandrel wherein the fiberizable material takes different paths from the source t... | 06/18/1991 |
| 4968238 | Apparatus for making a non-woven sheet A device to detect the loss of a continuous spun web of plexifilament fibers exiting a forwarding apparatus depends on the manner in which the filaments oscillate in a cross machine direction prior to depositing onto a collecting surface. The loss of thes... | 11/06/1990 |
| 4904174 | Apparatus for electrically charging meltblown webs (B-001) Meltblowing apparatus includes electrodes spaced from the meltblowing die discharge and protruding grounded emitters positioned proximate the die discharge. The preferred emitters are in the form of pointed pins spaced along and flanking the die discharge... | 02/27/1990 |
| 4842505 | Apparatus for producing fibrous structures electrostatically Apparatus for producing a fibrous structure including electrostatically charged mandrels arranged around a delivery assembly for fiberizable material. The delivery assembly includes capillary needles to which fiberizable material is supplied from a reserv... | 06/27/1989 |
| 4810180 | Apparatus for the electrostatic treatment of monofilaments Apparatus for effecting the electrostatically induced thermal modification and disruptive surface deformation of liquid monofilamentous materials in a gaseous environment.... | 03/07/1989 |
| 4810319 | Method of making a monofilament having on the surface embedded filamentons material A method for effecting the electrostatically enhanced and selectively directed deposition of short lengths of solid filamentous materials onto the surface of a downwardly flowing liquid monofilament in a gaseous environment concurrently with an electrosta... | 03/07/1989 |
| 4798607 | Process of crosslinking a polyurethane prosthesis with a haloalkylisocyante A process is disclosed for producing a medical prosthesis by forming the prosthesis from an uncrosslinked polyurethane and then at least partially crosslinking the polyurethane with a vaporizable halo alkylisocyanate. The haloalkylisocyanate (e.g. chlorom... | 01/17/1989 |
| 4752202 | Apparatus for producing oriented fiber aggregate The present invention relates to an apparatus for continuously producing one-dimensionally oriented fiber aggregate in which an orientation vessel includes a case, a supply portion, an orientation portion, a discharge portion, at least one pair of electro... | 06/21/1988 |
| 4689186 | Production of electrostatically spun products Preparation of products having a tubular portion comprising electrostatically spinning a fiberizable liquid, the electrostatic field being distorted by the presence of an auxiliary electrode, preferably so as to encourage the deposition of circumferential... | 08/25/1987 |
| 4608212 | Method for the electrostatic treatment of monofilaments Method for effecting the electrostatically induced thermal modification and disruptive surface deformation of liquid monofilamentous materials in a gaseous environment.... | 08/26/1986 |
| 4552707 | Synthetic vascular grafts, and methods of manufacturing such grafts A synthetic vascular graft is made by electrostatically spinning an organic polymeric material or a precursor thereof and collecting the spun fibres on a rotating mandrel (13), the method comprising the step of controlling the speed of rotation of the man... | 11/12/1985 |
| 4537733 | Nonwoven fiber-sheet process A process is provided for reducing the size and number of undesirable gauge bands in wound-up rolls of wide nonwoven sheet that is produced by a plurality of oscillating fiber streams depositing fiber on a moving receiver. The desired effect is accomplish... | 08/27/1985 |
| 4524036 | Process for the manufacture of polyurethane resin for electrostatic spinning A process for the preparation of polyurethane resins particularly suitable for electrostatic spinning which comprises forming a prepolymer of polyether glycol and a diisocyanate reacted in a molar ratio of about 1:2, and thereafter reacting the prepolymer... | 06/18/1985 |
| 4352650 | Nozzle for flash-extrusion apparatus An improved nozzle is provided for the spinneret pack of an apparatus for flash-extruding a polymer solution to form a plexifilamentary strand. The improved nozzle contains a flared tunnel that is coaxial with and immediately downstream of the extrusion o... | 10/05/1982 |
| 4345414 | Shaping process A process for setting in a desired shape a product at least a portion of which comprises electrostatically spun fibres is disclosed. The process comprises maintaining the product in the desired shape at a temperature below the melding temperature of the e... | 08/24/1982 |
| 4325795 | Process for forming ambient temperature superconducting filaments This invention is a process for forming electrical conductors in the form of filaments which exhibit properties of electrical superconductivity at ambient or normal room temperature. The process includes the preparation of a molten mixture of conducting a... | 04/20/1982 |
| 4323525 | Electrostatic spinning of tubular products A process for electrostatically spinning fiber forming material. The spun fiber is collected on a removable sheath on a rotating mandrel. The sheath is electroconductive. The tubular spun fiber product is separated from the sheath.... | 04/06/1982 |
