Patents by Inventor Pai-Chuan Wu

Pai-Chuan Wu has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 5143774
    Abstract: An embossed thermoplastic liquid barrier film is disclosed having a visible nonwoven fibrous three-dimensionally embossed pattern in the film on both sides. The films have thicknesses of about 0.5 to about 2 mils and an embossed depth to provide the visible nonwoven fibrous three-dimensionally embossed pattern with the film having a soft hand feel.
    Type: Grant
    Filed: September 1, 1989
    Date of Patent: September 1, 1992
    Assignee: Clopay Corporation
    Inventors: Leopoldo Cancio, Thomas C. Ryle, Pai-Chuan Wu
  • Patent number: 5084039
    Abstract: Novel thermoplastic sheet materials for permitting positionable and repeated repositionable use of tape fasteners therewith without experiencing substnatial loss of tape adhesion therebetween are disclosed. A novel thermoplastic sheet material generally comprises an ethylene polymer and an anti-popoff polymer in an effective amount for increasing and substantially maintaining the tape adhesion. The increase in and substantial maintenance of the tape adhesion is accomplished without adversely affecting the properties or cost of the thermoplastic sheet material. A preferred formulation for producing the novel thermoplastic sheet material comprises polyethylene as the ethylene polymer and a polypropylene or alpha-methyl styrene as the anti-popoff polymer. The novel thermoplastic sheet materials are especially suitable for use as films which can be used as backsheets in absorbent articles, such as, disposable diapers, bandages, surgical dressings or drapes and catamenial pads.
    Type: Grant
    Filed: June 7, 1989
    Date of Patent: January 28, 1992
    Assignee: Clopay Corporation
    Inventors: Leopoldo V. Cancio, Thomas R. Ryle, Robert J. Tomany, Pai-Chuan Wu
  • Patent number: 4668463
    Abstract: A method for producing a linear low density polyethylene (LLDPE) film by slot-die extrusion from an extrudate having an inherent draw resonance tendency whereby draw resonance is eliminated in the production of film at high speeds. Film of commercially uniform gauge thickness is obtained having significantly improved strength over films formed by conventional slot-die extrusion of LLDPE.
    Type: Grant
    Filed: July 21, 1982
    Date of Patent: May 26, 1987
    Assignee: Clopay Corporation
    Inventors: Leopoldo V. Cancio, James N. Fitzsimmons, Robert M. Mortellite, Pai-Chuan Wu
  • Patent number: 4626574
    Abstract: A method for producing a linear low density polyethylene (LLDPE) film by slot-die extrusion from an extrudate having an inherent draw resonance tendency whereby draw resonance is eliminated in the production of film at high speeds. Film of commercially uniform gauge thickness is obtained having significantly improved strength over films formed by conventional slot-die extrusion of LLDPE.
    Type: Grant
    Filed: February 8, 1985
    Date of Patent: December 2, 1986
    Assignee: Clopay Corporation
    Inventors: Leopoldo V. Cancio, James N. Fitzsimmons, Robert M. Mortellite, Pai-Chuan Wu
  • Patent number: 4546029
    Abstract: A plastic film having a random embossed matte finish is provided. The random embossed matte film may be wound very easily into rolls and the roll contour achieved has superior uniformity. In addition, the film provides relatively equal tape adhesion and gloss properties on both sides which make it especially suitable for use in articles such as disposable diapers or underpads. Another advantageous property which renders it especially suitable for diaper conversion operations is its very low degree of edge curl. The thin film provides a totally different appearance as compared to conventional diaper films in that the overall appearance is a dull matte finish, but nonetheless having slight sparkles of brilliance throughout the surface, and it further provides a softer feel.
    Type: Grant
    Filed: June 18, 1984
    Date of Patent: October 8, 1985
    Assignee: Clopay Corporation
    Inventors: Leopoldo V. Cancio, Pai-Chuan Wu
  • Patent number: 4465729
    Abstract: A plastic film is disclosed having a fine grid of embossed intersecting hand-tear lines formed in the surface of the film whereby the film may be torn by hand in more than one direction. The film is composed of a polymeric material incorporating a dispersed phase. The film is particularly suited for the manufacture of articles requiring sizing of the material in both lengthwise and widthwise direction to conform the film to a desired size.
    Type: Grant
    Filed: April 5, 1983
    Date of Patent: August 14, 1984
    Assignee: Clopay Corporation
    Inventors: Leopoldo V. Cancio, Pai-Chuan Wu
  • Patent number: 4380564
    Abstract: A decorative plastic sheet material having intersecting tear lines formed in the surface of the sheet material whereby the material may be torn by hand in more than one direction. The decorative sheet material is composed of a polymeric material incorporating a dispersed phase. The sheet material is particularly suited for the manufacture of decorative surface coverings such as shelf liners and the like which require sizing of the material in both a lengthwise and widthwise direction to conform it to the dimensions of the surface being covered.
    Type: Grant
    Filed: August 5, 1981
    Date of Patent: April 19, 1983
    Assignee: Clopay Corporation
    Inventors: Leopoldo V. Cancio, Pai-Chuan Wu
  • Patent number: 4376147
    Abstract: A plastic film having a matte finish embossed on its surface is provided. The matte plastic film has excellent winding characteristics without edge curl, extremely low gloss even on both sides and good tape adhesion properties, among other advantages, which make it especially suitable for use in articles such as disposable diapers.
    Type: Grant
    Filed: August 31, 1981
    Date of Patent: March 8, 1983
    Assignee: Clopay Corporation
    Inventors: Robert E. Byrne, Leopoldo V. Cancio, Arthur J. Raffel, Pai-Chuan Wu
  • Patent number: 4298647
    Abstract: A decorative plastic sheet material having intersecting tear lines formed in the surface of the sheet material whereby the material may be torn by hand in more than one direction. The decorative sheet material is composed of a polymeric material incorporating a dispersed phase. The sheet material is particularly suited for the manufacture of decorative surface coverings such as shelf liners and the like which require sizing of the material in both a lengthwise and widthwise direction to conform it to the dimensions of the surface being covered.
    Type: Grant
    Filed: July 16, 1979
    Date of Patent: November 3, 1981
    Assignee: Clopay Corporation
    Inventors: Leopoldo V. Cancio, Pai-Chuan Wu
  • Patent number: 4284671
    Abstract: Polymer blends of a polyester and polyvinyl alcohol, or their copolymers, may be fabricated into barrier packaging materials having very low permeabilities to oxygen, other fixed gases and moisture.
    Type: Grant
    Filed: May 11, 1979
    Date of Patent: August 18, 1981
    Assignee: Clopay Corporation
    Inventors: Leopoldo V. Cancio, Gerald W. Miller, Pai-Chuan Wu