Patents Assigned to Ludlow Corporation
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Patent number: 5824033Abstract: A disposable transcutaneous electrode comprising, in a first embodiment, a sheet electrode member of electrically conductive carbon filled polymer, an electrically conductive metal/metal coating on at least a major portion of the lower side of the electrode member. A pad of electrically conductive gel having an upper surface underlies the metal/metal chloride coating on the lower side of the electrode member. A current distributing mat conductively adhered to the upper side of the sheet electrode member has a perimeter spaced inwardly of the perimeter of the electrode member and includes an open mesh metallized carbon fiber web having a carbon impregnated pressure sensitive adhesive composition on upper and lower sides of the web. The mat is configured to be electrically conductive along the surfaces of the mat and transverse to the surfaces of the mat. Defibrillating energy is conducted to or from the upper side of the mat by, e.g.Type: GrantFiled: March 18, 1997Date of Patent: October 20, 1998Assignee: Ludlow CorporationInventor: R. Keith Ferrari
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Patent number: 5683029Abstract: A combination sealing and opening strip for various types of packages comprises a three-layer laminate strip having a centrally-located, high strength membrane with pressure-sensitive adhesive on both sides of the membrane. The membrane comprises a material, such as MYLAR.RTM. flexible synthetic film, polyester, other polymeric films, fiberglass, or fibrous or non-fibrous materials of various compositions with a strength greater than that of the package material. This provides for a controlled tearing of the package material. During strip manufacture, the adhesive-coated strip is laminated in precise registration onto a differentially-coated release liner. The combination strip and release liner are applied to the package material in a location such as the flap of a common overnight envelope. When sealing the package, the user peels the release liner from the strip.Type: GrantFiled: April 24, 1996Date of Patent: November 4, 1997Assignee: Ludlow CorporationInventor: Joseph N. Lyons
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Patent number: 5465715Abstract: A biomedical monitoring or stimulating electrode that adheres to a person's skin is disclosed. The electrode is made of a thin, flat flexible material and includes a die-cut patch having one or more adhesive coatings applied on one side of the patch, a foundation component formed into four integral functional areas, a conductive component made up of an electrically conductive material with three contiguous portions, and a conductive media. A connector interfaces with a tab portion of the electrode. The connector includes an electrically conductive element having an inclined surface upon which the tab of the electrode rests. A slider is movable between two positions such that when in its closed position, the electrode neck and head is trapped in the connector and the slider exerts a force on the inclined surface of a cavity of the connector, providing electrical connection to electrode. Thus, the cavity and firm compression act to prevent the electrode from becoming disengaged from the connector.Type: GrantFiled: November 14, 1994Date of Patent: November 14, 1995Assignee: Ludlow CorporationInventor: Joseph N. Lyons
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Patent number: 5431166Abstract: An electrode having an extremely low profile and suitable for disposable use includes a base sheet constructed of a flexible conductive polymer. A tab is laminated to the top of the base sheet to form a pocket between the tab and the base sheet extending along the base sheet for receiving a hook connector. The hook connector has a bill and shank joined by a bend, the bill fitting between the pocket and the shank lying on top of the tab when the bill is so engaged to allow a low profile connection to the electrode. The elimination of rigid parts from the electrode improves its comfort and functionality.Type: GrantFiled: January 22, 1993Date of Patent: July 11, 1995Assignee: Ludlow CorporationInventor: Robert A. Macur
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Patent number: 5372125Abstract: A biomedical monitoring or stimulating electrode that adheres to a person's skin is disclosed. The electrode is made of a thin, flat flexible material and includes a die-cut patch having a non-conductive adhesive coating applied on one side of the patch, a foundation component formed into four integral functional areas, a conductive component made up of an electrically conductive material with three contiguous portions, and a conductive media. Also disclosed is a connector that interfaces with a tab portion of the electrode. The connector includes an electrically conductive element having an inclined surface upon which the tab of the electrode rests. A slider is movable between two positions such that when in its closed position, the electrode neck and head is trapped in the connector and the slider exerts a force on the inclined surface of a cavity of the connector, providing electrical connection to electrode.Type: GrantFiled: August 13, 1993Date of Patent: December 13, 1994Assignee: Ludlow CorporationInventor: Joseph N. Lyons
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Patent number: 5356372Abstract: An occlusive, pressure-reducing wound dressing with a multi-layer laminate construction providing one easy-to-apply dressing. The occlusive pressure-reducing dressing includes an occlusive, wound-contacting layer made of a biologically compatible polymer. A pressure-reducing layer is joined at a bottom surface to the occlusive layer. The pressure-reducing layer is comprised of a soft, air-containing material such as a foam or an air-entrapping film which has a top surface shaped to provide a progressive rate of resistance to compressive force applied to the pressure-reducing layer and which allows the pressure-reducing layer to conform to curved body surfaces. The occlusive portion of the dressing therefore provides a moist environment and a barrier against infection while the pressure-reducing portion or component minimizes interaction between the wound and any supporing surface in contact therewith.Type: GrantFiled: December 1, 1993Date of Patent: October 18, 1994Assignee: Ludlow CorporationInventors: Maura G. Donovan, Matthew A. Bergan
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Patent number: 5352315Abstract: A novel biomedical electrode comprising 1) a non-conductive backing layer with instructions printed on one surface, 2) an ink layer having either a) an ink comprising silver and silver salt, or b) a blend of inks including a first ink comprising silver and silver salt and a second ink comprising an inert carbon based material printed in a pattern onto the second surface of the non-conductive backing layer, 3) a conductive-adhesive electrolyte layer coated directly onto the inked surface of the non-conductive backing layer, and 4) a protective release liner which covers the conductive adhesive layer. Certain preferred embodiments correspond to situation wherein the body parts being monitored display diverse impedances. In those embodiments, parameters such as ink blend, ink amount (i.e., ink thickness and ink pattern) are varied in order to vary the impedance of a given electrode.Type: GrantFiled: November 5, 1993Date of Patent: October 4, 1994Assignee: Ludlow CorporationInventors: Levi A. Carrier, Jay M. Ruehlen, Nilay Sankalia
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Patent number: 4509197Abstract: A novel heat-sealed and heat-sterilizable construction with an opaque member readily peelable to provide a view of the contents of the bag.Type: GrantFiled: September 29, 1982Date of Patent: April 2, 1985Assignee: Ludlow CorporationInventor: Florren E. Long
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Patent number: 4488646Abstract: A novel lottery ticket comprising a blush-type coating which coating is characterized by susceptibility to a change in appearance when exposed to either (a) any of a wide spectrum of organic solvents or (b) an elevated temperature. Such susceptibility reveals that solvent or thermal techniques have been used in tampering with the ticket or a pouch package in which the ticket is held. Such tampering is often the result of an illicit attempt to obtain information about the indicia printed on the ticket.Type: GrantFiled: October 3, 1983Date of Patent: December 18, 1984Assignee: Ludlow CorporationInventor: James L. McCorkle
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Patent number: 4444827Abstract: An improved, tough, opaque laminate structure, particularly useful for incorporation into packaging for light-sensitive photographic products. The laminate comprises a polyisobutylene-modified, high-density polyethylene layer which is sandwiched between two layers of linear low density or linear medium density polyethylene.Type: GrantFiled: June 24, 1982Date of Patent: April 24, 1984Assignee: Ludlow CorporationInventor: Nareshwar Swaroop
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Patent number: 4407443Abstract: A novel lottery ticket comprising a blush-type coating which coating is characterized by susceptibility to a change in appearance when exposed to either (a) any of a wide spectrum of organic solvents or (b) an elevated temperature. Such susceptibility reveals that solvent or thermal techniques have been used in tampering with the ticket or a pouch package in which the ticket is held. Such tampering is often the result of an illicit attempt to obtain information about the indicia printed on the ticket.Type: GrantFiled: January 29, 1979Date of Patent: October 4, 1983Assignee: Ludlow CorporationInventor: James McCorkle
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Patent number: 4393117Abstract: An improved process for coating a pressure sensitive adhesive upon a differential-release-type substrate and the products produced thereby. The coating procedure involves using a solvent-free hot-melt adhesive coating system and a short period of exposure to the environment of the web being processed between the time the web is coated with adhesive and spooled for packaging.Type: GrantFiled: July 13, 1981Date of Patent: July 12, 1983Assignee: Ludlow CorporationInventors: George O. Stricker, Karl H. Teumer, Ronald C. Groenendal
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Patent number: 4375486Abstract: An improved dielectric printing paper and process for making the same, characterized by excellent resolution, contrast, and feel. The paper incorporates an inorganic salt such as magnesium chloride as a conductivity-providing ingredient. The dielectric coating is formed with a high loading of inorganic fillers and is applied by a dry process to form a discontinuous dielectric coating on the conductive paper substrate.Type: GrantFiled: July 14, 1981Date of Patent: March 1, 1983Assignee: Ludlow CorporationInventor: Philip J. Clough
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Patent number: 4323586Abstract: The invention relates to a novel duplex pouch structure which provides an improved means to package and process retortable foods and also provides a mechanically superior package which can be transported with only moderate protection, and yet will sustain minimal damage.Type: GrantFiled: October 20, 1980Date of Patent: April 6, 1982Assignee: Ludlow CorporationInventor: Florren E. Long
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Patent number: 4322003Abstract: An improved flexible package for use in packaging acids, oxidants and the like is constructed with a laminate comprising, at least, an amorphous polyester ply and a metal foil ply. The package is characterized by a superior combination of excellent stability in heatsealing operations over a wide range of conditions and extraordinary chemical resistance to oxidants and acids.Type: GrantFiled: March 26, 1980Date of Patent: March 30, 1982Assignee: Ludlow CorporationInventor: Florren E. Long
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Patent number: 4310035Abstract: Apparatus and process for use in high-speed packaging of liquid-bearing substances, particularly foods. The apparatus comprises means to shield a sealable, particularly a heatsealable, portion of each of a series of packages with a protective and disposable shield means.Type: GrantFiled: March 21, 1980Date of Patent: January 12, 1982Assignee: Ludlow CorporationInventor: Howard M. Turner
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Patent number: 4303720Abstract: An improved dielectric printing paper and process for making the same, characterized by excellent resolution, contrast, and feel. The paper incorporates an inorganic salt such as magnesium chloride as a conductivity-providing ingredient. The dielectric coating is formed with a high loading of inorganic fillers and is applied by a dry process to form a discontinuous dielectric coating on the conductive paper substrate.Type: GrantFiled: July 10, 1980Date of Patent: December 1, 1981Assignee: Ludlow CorporationInventor: Philip J. Clough
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Patent number: 4273362Abstract: An information-bearing article for conveying indicia from one person to a second person in such a way that the information cannot be surreptitiously detected by an intervening person. Thus, the information-bearing means is so constructed that detection thereof necessarily requires some irreparable and detectable disfigurement or mutilation of the information-bearing article. Use of the article in lottery ticket distribution and use in connection with the transfer of highly confidential governmental or business information, are typical applications. The most advantageous construction of the invention combines means to avoid surreptitious detection of the hidden indicia by optical, chemical, thermal and mechanical processes.Type: GrantFiled: April 21, 1978Date of Patent: June 16, 1981Assignee: Ludlow CorporationInventors: Lee A. Carrier, Leon G. Carpenter
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Patent number: 4269881Abstract: A novel carpet material or mat which is characterized by an extraordinary ability to quickly and comfortably discharge any build-up of a static electricity charge on a person who has built up such a charge, say, by walking across conventional carpeting. The novel material is constructed with a backing which has a low dissipation factor and relatively low volume and surface conductivity, with a conductive thread in the pile and with an electroconductive tufting substrate sheet.Type: GrantFiled: October 18, 1976Date of Patent: May 26, 1981Assignee: Ludlow CorporationInventors: Donald C. Johnson, Walter L. Burdorf
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Patent number: 4268531Abstract: A packaging material, and especially condiment-carrying packages prepared therefrom, which is characterized by its thinness and consequent ease of handling. Moreover, condiments packaged therein have greatly extended storage life. In general, the package comprises using a relatively thin coating formed of an ionomer and a polyethylene of relatively low softening point, this coating conveniently being coextruded and incorporated into a laminated structure which will normally also comprise layers of cellophane and aluminum foil.Type: GrantFiled: November 10, 1976Date of Patent: May 19, 1981Assignee: Ludlow CorporationInventor: Philip C. Whiting, Jr.