Patents Represented by Attorney William D. Lee

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  • Method of making a micro-bubble laminate
    Patent number: 4950354
    Abstract: A micro-bubble laminate is made by drawing a heated thermoplastic film through the perforations of a perforated substrate laminated to the film. The bubbles may then be trapped by laminating an additional thermoplastic layer to the laminate construction. This laminate may be used in producing air cushioning or bubble laminates, and the inventive process avoids the intricate and expensive machinery typically used in the production of air cushioning materials.
    Type: Grant
    Filed: August 25, 1989
    Date of Patent: August 21, 1990
    Assignee: W. R. Grace & Co.-Conn.
    Inventor: Henry G. Schirmer
  • Flexible medical solution tubing
    Patent number: 4948643
    Abstract: A medical solution tubing useful in combination with medical solution packages and pouches includes an intermediate layer comprising a polymeric material which imparts flexibility to the film; an inner layer comprising a heat resistant polymer; and an outer layer of polypropylene, ethylene propylene copolymer, or modified ethylene propylene copolymer.
    Type: Grant
    Filed: April 21, 1989
    Date of Patent: August 14, 1990
    Assignee: W. R. Grace & Co.-Conn.
    Inventor: Walter B. Mueller
  • Shrink package of improved product to container fit
    Patent number: 4948604
    Abstract: A package of shrunken heat-shrinkable flexible film conformed to a contained food product has no gap or virtually no gap between the food product and the shrunken film. Prior to heat shrinking, the package is subjected to non-ionizing radiation.
    Type: Grant
    Filed: February 22, 1989
    Date of Patent: August 14, 1990
    Assignee: W. R. Grace & Co.-Conn.
    Inventors: Richard O. Kuehne, Karl R. Deily, Timothy L. Lawlis
  • High barrier low profile forming web
    Patent number: 4940634
    Abstract: A forming web comprises a first extruded polymeric film oriented to substantially the same extent in both the longitudinal and machine directions. Alternately, a high molecular weight crystalline polyolefin is blown at least to a blow-up ratio sufficient to orient the film to substantially the same extent in both the longitudinal and machine directions. A second extruded polymeric film including a layer of an oxygen barrier polymeric material may be laminated to the first film.
    Type: Grant
    Filed: March 21, 1986
    Date of Patent: July 10, 1990
    Assignee: W. R. Grace & Co.-Conn.
    Inventors: Walter B. Mueller, Henry G. Schirmer
  • Barrier stretch film
    Patent number: 4939076
    Abstract: A barrier stretch film comprises an outer layer of a heat sealable polymeric material; a first interior layer of an oxygen barrier polymeric material; a second interior layer of a high molecular weight polymer; an inner copolyamide layer; and an adhesive between the second interior and inner layers.
    Type: Grant
    Filed: July 26, 1988
    Date of Patent: July 3, 1990
    Assignee: W. R. Grace & Co.-Conn.
    Inventor: Walter B. Mueller
  • Monoaxially oriented shrink film
    Patent number: 4938683
    Abstract: A coextruded multiple layer film is oriented in primarily the longitudinal direction, and comprises a core layer comprising butadiene styrene copolymer or copolyester, outer layers comprising ethylene propylene copolymer, polypropylene, or blends thereof, and intermediate layers which bond the outer layers to the core layer and comprise an ethylene copolymer.
    Type: Grant
    Filed: July 7, 1989
    Date of Patent: July 3, 1990
    Assignee: W. R. Grace & Co.-Conn.
    Inventor: Peter R. Boice
  • High barrier low profile forming web
    Patent number: 4938828
    Abstract: A forming web comprises a first extruded polymeric film oriented to substantially the same extent in both the longitudinal and machine directions. Alternately, a high molecular weight crystalline polyolefin is blown at least to a blow-up ratio sufficient to orient the film to substantially the same extent in both the longitudinal and machine directions. A second extruded polymeric film including a layer of an oxygen barrier polymeric material may be laminated to the first film.
    Type: Grant
    Filed: October 12, 1989
    Date of Patent: July 3, 1990
    Assignee: W. R. Grace & Co.-Conn.
    Inventors: Walter B. Mueller, Henry G. Schirmer
  • Multilayer film for packaging items under controlled atmosphere
    Patent number: 4939040
    Abstract: A packaging film is disclosed having both gas barrier and stretchability properties comprising at least one barrier layer made of polymers or copolymers with low gas permeability modified by the inclusion therein of 1 to 20% by weight of a stiffness modifying agent selected from plasticizers and elastomers, and at least one stretchable layer of olefin polymers or copolymers.
    Type: Grant
    Filed: December 8, 1989
    Date of Patent: July 3, 1990
    Assignee: W. R. Grace & Co.-Conn.
    Inventors: Aurelio Oreglia, Mario Gillio-Tos
  • Method of making a thermoformable barrier sheet
    Patent number: 4935089
    Abstract: Thermoformable barrier sheet includes a barrier film having low oxygen transmission, and a thermoformable plastic, especially a foamed or unfoamed polystyrene sheet bonded thereto. Bonding can be accomplished by corona bonding or by thermal bonding.
    Type: Grant
    Filed: April 7, 1989
    Date of Patent: June 19, 1990
    Assignee: W. R. Grace & Co.-Conn.
    Inventor: Henry G. Schirmer
  • Lettuce packaging film
    Patent number: 4935271
    Abstract: A multilayer laminate comprises a first perforated film of propylene homopolymer or copolymer, and a second film bonded to the first film and including a bonding layer of ethylene vinyl acetate copolymer and an outer heat sealable layer.
    Type: Grant
    Filed: September 6, 1988
    Date of Patent: June 19, 1990
    Assignee: W. R. Grace & Co.-Conn.
    Inventor: Henry G. Schirmer
  • Oxygen-barrier retort pouch
    Patent number: 4928474
    Abstract: A method of providing oxygen barrier properties to a retorted container is described. A retort container is filled with a product sensitive to spoilage from oxygen contact, such as certain food. The filled container is heat sealed closed, retorted, and then enclosed with a oxygen barrier material.
    Type: Grant
    Filed: September 21, 1988
    Date of Patent: May 29, 1990
    Assignee: W. R. Grace & Co.-Conn.
    Inventor: Henry G. Schirmer
  • Implosion resistant films
    Patent number: 4927691
    Abstract: A multilayer film useful in vacuum skin packaging and other vacuum packaging applications, having improved implosion resistance and resistance to bridging, includes core and intermediate layers of EVA, layers of polymer between the EVA layers, and abuse and sealant layers. A barrier version includes a core layer of oxygen barrier polymeric material.
    Type: Grant
    Filed: October 16, 1987
    Date of Patent: May 22, 1990
    Assignee: W. R. Grace & Co.-Conn.
    Inventor: Solomon Bekele
  • Flexible stretch/shrink film
    Patent number: 4927708
    Abstract: A multi-layered thermoplastic polyolefin film having an improved combination of physical characteristics is disclosed. In particular, the multi-layered film evidences an improved combination of abuse resistance, elongation, and flexibility. Preferred five layer embodiments of the film comprise (1) a core layer of very low density polyethylene; (2) two adjacent intermediate layers of a linear low density polyethylene and (3) two outer layers of an ethylene vinyl acetate copolymer or very low density polyethylene.
    Type: Grant
    Filed: July 26, 1988
    Date of Patent: May 22, 1990
    Assignee: W. R. Grace & Co.-Conn.
    Inventors: Vincent W. Herran, George D. Wofford
  • Turkey package
    Patent number: 4925687
    Abstract: A method of packaging turkey emulsion and turkey skin in a flexible plastic package wherein the turkey skin has been frozen prior to insertion into the package.
    Type: Grant
    Filed: August 8, 1988
    Date of Patent: May 15, 1990
    Assignee: W. R. Grace & Co.-Conn.
    Inventors: Stephen L. Gray, John E. Horner
  • Vacuum packaging method
    Patent number: 4922686
    Abstract: A vacuum packaging process and apparatus employ the novel step of deliberately at least partially re-pressurizing the exterior of a packaging receptacle after commencement of the evacuation of the exterior and interior of the receptacle in a chamber. Preferably two separate gas pressure restoration phases are employed, separated by a resumption of the gas extraction, and the receptacle is closed during the second of these gas pressure restoration phases.
    Type: Grant
    Filed: June 21, 1985
    Date of Patent: May 8, 1990
    Assignee: W. R. Grace & Co.
    Inventor: Pietro Segota
  • Vacuum skin packages with reduced product discoloration
    Patent number: 4910033
    Abstract: Discoloration of meat products due to oxygen starvation in stacked packages is significantly reduced by applying a textured surface to the bottom of the packages. A discrete textured film may be adhered to a tray or supporting member, or the tray or supporting member may itself be textured at its bottom surface.
    Type: Grant
    Filed: May 13, 1988
    Date of Patent: March 20, 1990
    Assignee: W. R. Grace & Co.
    Inventors: Solomon Bekele, Allen C. Williams, Jr.
  • Bonding method effecting inter-ply adhesion between saran and linear ethylene copolymers
    Patent number: 4909881
    Abstract: This invention relates to a method of improving the adhesion between a layer of vinylidene chloride copolymer and a layer of a linear ethylene/alpha-olefin copolymer and to the film produced thereby. More particularly, the invention relates to heat shrinkable films having a barrier layer of vinylidene chloride copolymer and a layer of linear low density polyethylene or very low density polyethylene and to a method for increasing the adhesion between the layers and thereby decreasing the incidence of delamination by blending the linear ethylene/alpha-olefin copolymer with an ethylene/butyl-acrylate copolymer.
    Type: Grant
    Filed: February 22, 1988
    Date of Patent: March 20, 1990
    Assignee: W. R. Grace and Co.-Conn.
    Inventor: Steven B. Garland
  • Laminated articles
    Patent number: 4906495
    Abstract: Laminated sheet material 9 comprises a laminate of a polyvinyl alcohol or other water-disintegratable film 12 with a thin coextruded film comprising a melt-bondable layer 15 and an impermeable layer 14. The laminate is odor impermeable but water disposable and so can be used to form a toilet-disposable ostomy bag by melt-sealing around the edges 10 between the facing melt-sealable surfaces 15.
    Type: Grant
    Filed: April 21, 1989
    Date of Patent: March 6, 1990
    Assignee: W. R. Grace & Co.
    Inventors: Francesco Martini, Luigi Perazzo
  • Easy-open flexible pouch and apparatus and method for making same
    Patent number: 4905452
    Abstract: A pouch and a method and apparatus for forming an easy open pouch in a vertical form-fill-seal process wherein a pouch is formed from a sheet of thermoplastic film and a heat seal between pouches as they are filled serves as the top closure for the lower pouch and a bottom closure for the upper pouch, the easy open feature being provided by a U-shaped portion having a plurality of seal ribs, and a tear initiation notch.
    Type: Grant
    Filed: June 26, 1989
    Date of Patent: March 6, 1990
    Assignee: W. R. Grace & Co.
    Inventor: Dennis J. Vogan
  • Post-pasteurization
    Patent number: H762
    Abstract: Precooked food products, especially meat products, which have been unpackaged and further processed, are repackaged in a heat tolerant structure and exposed to temperatures of between about 160.degree. F. and 205.degree. F. for 30 seconds to 10 minutes, time and temperature depending on the particular product. This post pasteurization treatment extends the shelf life of the product.
    Type: Grant
    Filed: April 7, 1989
    Date of Patent: April 3, 1990
    Assignee: W. R. Grace & Co.-Conn.
    Inventors: Thomas W. DeMasi, Karl R. Deily