Patents Represented by Attorney W. A. Marcontell
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Patent number: 5401899Abstract: A low contaminant level is maintained in a high flow rate paper machine coating fluid circulation system by shunting a significant minority portion of the total flow through a full flow, atmospherically open, self-cleaning screen having a fine mesh screen cloth. Accept flow from the open screen is directed to the flow inlet of an entrained air purging apparatus for dispersing consolidated particulates of excessive size. Flow from the particulate disbursing apparatus is thereafter pumped through an enclosed pressure screen of moderate screen mesh.Type: GrantFiled: April 15, 1993Date of Patent: March 28, 1995Assignee: Westvaco CorporationInventors: Wayne S. Bryant, James J. Masella, III
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Patent number: 5356070Abstract: A composite food packaging article having internal partitioning walls and corresponding method of manufacture is constructed from flat, machine formed paperboard. A pair of die cut and folded paperboard blanks are inserted within the opposing cavities of a blow mold. A hot-flow parison between the cavities expands to structurally unitize the folded paper blank into a fluid impermeable tray vessel.Type: GrantFiled: January 27, 1993Date of Patent: October 18, 1994Assignee: Westvaco CorporationInventor: William R. Rigby
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Patent number: 5326021Abstract: A composite material package in the configuration of a fluid confining tray or bowl is fabricated with a corrugated paperboard structural substrate and internally sealed with a blow mold applied film of polymer.Type: GrantFiled: January 28, 1993Date of Patent: July 5, 1994Assignee: Westvaco CorporationInventors: Robert A. Farrell, Todd H. Huffman
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Patent number: 5323956Abstract: A composite material package in the configuration of a fluid confining bowl with curved or arched side walls is fabricated with a paperboard structural substrate and internally sealed with a blow mold applied film of polymer.Type: GrantFiled: March 1, 1993Date of Patent: June 28, 1994Assignee: Westvaco CorporationInventor: William A. Marcontell
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Patent number: 5302250Abstract: Paper machine deckle defining structure is protected from fiber accumulations by a uniformly distributed water film that continuously flows from a flat, horizontal upper surface over all smoothly faired lower surfaces of the deckle elements.Type: GrantFiled: October 9, 1992Date of Patent: April 12, 1994Assignee: Westvaco CorporationInventors: Ralph S. Peterson, William J. Thurston
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Patent number: 5300193Abstract: Papermachine stock consistency is regulated while carried along a forming wire table. A variable draft vacuum box disposed beneath the forming wire to draw water from the wire carried stock is automatically adjusted in response to the summation of signals from several sources. A radioactive mass measuring gauge having a sensor head positioned beneath the forming wire downstream of the vacuum box provides a signal value indicative of the total mass carried above the sensor head. From this mass measuring gauge signal is deducted a value representative of the wire mass; the remainder representing the stock mass comprising a mixture of fiber and water. The quantity of fiber in the stock mixture, independent of the water, is determined by a dry basis weight measure of paper made from the stock. A signal value representative of the fiber basis weight is divided by the stock mass signal value to yield a consistency signal value.Type: GrantFiled: January 28, 1993Date of Patent: April 5, 1994Assignee: Westvaco CorporationInventors: James A. Rule, Jr., Jeffery S. Sanford, Allen C. Wall
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Patent number: 5298127Abstract: A paper machine deckle board is supported and protected from fiber accumulations by a multi-functional structure which adjustably positions the deckle board with an integrated flushing water conduit and film distribution fountain.Type: GrantFiled: October 23, 1992Date of Patent: March 29, 1994Assignee: Westvaco CorporationInventor: Robert L. Beran
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Patent number: 5296101Abstract: Paper machine deckle defining structure is protected from fiber accumulations by a uniformly distributed water film that continuously flows from a flat, horizontal upper surface over all smoothly faired lower surfaces of the deckle elements.Type: GrantFiled: October 8, 1992Date of Patent: March 22, 1994Assignee: Westvaco CorporationInventor: Ralph S. Peterson
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Patent number: 5291029Abstract: An in situ traveling paper machine web is stabilized from flutter and vibration for the purpose of formation and optical property measurement by an air flow system by which a boundary layer air stream between a sole plate and the adjacent web surface secures the web in a stable position.Type: GrantFiled: May 13, 1993Date of Patent: March 1, 1994Assignee: Westvaco CorporationInventor: Willem A. Nikkel
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Patent number: 5284551Abstract: To protect the paper machine fourdrinier screen, deckle blades are fabricated with a soft polymer (polytetrafluoroethylene) lower edge having little adhesive affinity for either papermaking fiber or traditional plastic bonding compounds. Necessary structural rigidity is contributed to the assembly by a mechanical cladding of suitably stiff polymer plates that are adhesively bonded to a compatible plastic mounting body.Type: GrantFiled: October 23, 1992Date of Patent: February 8, 1994Assignee: Westvaco CorporationInventors: Robert L. Beran, Stephen Nicholson, Mark A. Taylor
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Patent number: 5269884Abstract: Paper machine cupping rails for curling the lateral edges of a web formation screen are protected from fiber accumulations by a uniformly distributed water film that continuously flows from a flat, horizontal upper surface respective to a plurality of conduit length increments.Type: GrantFiled: October 8, 1992Date of Patent: December 14, 1993Assignee: Westvaco CorporationInventor: Ralph S. Peterson
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Patent number: 5228272Abstract: Folded paperboard food cartons having a polymer coating only on the interior surface and sales graphics on a substantially unplasticized clay coated exterior surface are heat sealed at contiguous areas of overlapping flaps wherein the polymer coated interior surface is in direct contact with a small portion of the clay coated exterior surface, or where it is desired to secure together two portions of the clay coated exterior surface. In such heat sealing areas, small and accurately located exterior clay coated carton surface areas are primed with a water based polymer emulsion such as ethylene vinyl acetate that is precisely applied to such areas by a printing press.Type: GrantFiled: January 21, 1993Date of Patent: July 20, 1993Assignee: Westvaco CorporationInventors: Barry G. Calvert, Walter H. Donnellan
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Patent number: 5229294Abstract: Instruments for determining the degree of delignification corresponding to a sample of kraft or soda process digested wood pulp are calibrated with a predetermined quantity of refined lignin. For convenient use and application, a standardized solution comprising such refined lignin and an organic solvent such as ethylene glycol may be prepared for distribution to use points. Such standardized refined lignin, whether tested as a powdered solid or as a standardized solution yields a consistent "K" Number, "Permanganate" Number, "Kappa" Number or "Klason" Number value from standardized titration test procedures.Type: GrantFiled: May 2, 1991Date of Patent: July 20, 1993Assignee: Westvaco CorporationInventor: James J. Foster
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Patent number: 5217159Abstract: Folded paperboard food cartons having a polymer coating only on the interior surface and sales graphics on a substantially unplasticized clay coated exterior surface are heat sealed at contiguous areas of overlapping flaps wherein the polymer coated interior surface is in direct contact with a small portion of the clay coated exterior surface or, where it is desired to secure together two portions of the clay coated exterior surface. In such heat sealing areas, small and accurately located exterior clay coated carton surface areas are primed with a water based polymer emulsion such as ethylene vinyl acetate that is precisely applied to such areas by a printing press.Type: GrantFiled: July 1, 1992Date of Patent: June 8, 1993Assignee: Westvaco CorporationInventors: Barry G. Calvert, Walter H. Donnellan
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Patent number: 5204069Abstract: Nozzles for directing a jet of steam against a spout flow stream of sodium recovery boiler smelt are secured to an articulating anchor mount for the purpose of maximizing the shattering impact of the steam jet upon the smelt flow stream under a wide range of boiler operating conditions.Type: GrantFiled: October 7, 1991Date of Patent: April 20, 1993Assignee: Westvaco CorporationInventors: Wendell L. Paxton, Gary W. Waddell
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Patent number: 5194388Abstract: Instruments for determining the degree of delignification corresponding to a sample of kraft or soda process digested wood pulp are calibrated with a predetermined quantity of refined lignin. For convenient use and application, a standardized solution comprising such refined lignin and an organic solvent such as ethylene glycol may be prepared for distribution to use points. Such standardized refined lignin, whether tested as a powdered solid or as a standardized solution yields a consistent "K" Number, "Permanganate" Number, "Kappa" Number or "Klason" Number value from standardized titration test procedures.Type: GrantFiled: July 10, 1989Date of Patent: March 16, 1993Assignee: Westvaco CorporationInventor: James J. Foster
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Patent number: 5184388Abstract: Box machine forming wheels are individually stabilized with a respective, frame mounted, stationary yoke disposed within the circumferential groove of a head wheel that is rigidly secured to the forming wheel. Lateral space between the yoke finger faces and the rotating groove walls is adjustably filled by rub plates mounted on dowel pins confined within yoke finger guide bores. A cone tipped adjustment screw cooperates with conical tips on the dowel pins to selectively expand the rub plate assembly for operational wear accommodation.Type: GrantFiled: March 16, 1992Date of Patent: February 9, 1993Assignee: Westvaco CorporationInventors: Zigmunt Nieradka, Robert W. Young
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Patent number: 5169470Abstract: The vessel portion of a gas-tight container suitable for packaging fresh foods is produced as a composite of paperboard and polymer film. A pair of folded paperboard blanks, pre-cut and pre-formed, are inserted into the opposite halves of split mold elements to a blow molding machine. Vacuum orifices in each mold half unit temporarily secure the position of a respective paperboard blank. The paperboard lined mold halves are closed upon a hot, extruded parison of malleable polymer leaving an end portion of the parison tube projecting from the closed mold unit. A fluid conducting needle penetrates this projected end portion to inflate the parison with an apppropriate blowing gas. Such inflation expands the malleable polymer, seamlessly and creaselessly, into the internal corners and crevices of the folded paperboard blanks. Following chilling, the mold unit is opened and the pair of paperboard blanks are ejected as a singular unit, joined by a molded flange of the continuous polymer film.Type: GrantFiled: July 30, 1991Date of Patent: December 8, 1992Assignee: Westvaco CorporationInventor: Barry A. Goldberg
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Patent number: 5158525Abstract: Box machine forming wheels are individually stabilized with a respective, frame mounted, stationary yoke meshed within the circumferential groove of a head wheel that is rigidly secured to the forming wheel. Lateral space between the stationary yoke finger faces and the rotating groove walls is adjustably filled by cam displaced disc pads confined within yoke finger guide bores. Selective cam rotation expands the disc pad assembly for operational wear accommodation.Type: GrantFiled: January 22, 1992Date of Patent: October 27, 1992Assignee: Westvaco CorporationInventor: Willem A. Nikkel
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Patent number: 5123891Abstract: Box machine forming wheels are individually stabilized with a respective, frame mounted, stationary yoke disposed within the circumferential groove of a head wheel that is rigidly secured to the forming wheel. Lateral space between the yoke finger faces and the rotating groove walls is adjustably filled by rub plates mounted on dowel pins confined within yoke finger guide bores. A cone tipped adjustment screw cooperates with conical tips on the dowel pins to selectively expand the rub plate assembly for operational wear accommodation.Type: GrantFiled: July 18, 1991Date of Patent: June 23, 1992Assignee: Westvaco CorporationInventors: Zigmunt Nieradka, Robert W. Young