Patents Assigned to Genpak Corporation
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Patent number: 5817261Abstract: There is disclosed a process for producing alkenyl aromatic foams utilizing a combination of atmospheric and organic gases as blowing agent, preferably using greater than 30% by weight of atmospheric gas, and preferably also using a predetermined about of a masterbatch mix comprising a styrenic polymer, a rubbery block copolymer, and a solid blowing agent. Also disclosed are alkenyl aromatic foams produced by the process which exhibit increased densities, increased thermoforming capabilities, increased post-expansion properties, and increased retainment of the atmospheric and organic gases.Type: GrantFiled: August 26, 1996Date of Patent: October 6, 1998Assignees: Reedy International Corp., Genpak CorporationInventors: Michael E. Reedy, Edward W. Rider, Jr.
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Patent number: 5762231Abstract: A tabless container closure for a compartmentalized container with a cover and a base. The cover includes a sidewall and a rim coupled thereto. The rim has a depression that fits within an opening in a sidewall of the base. The rim depression and opening provide a snap-fit closure to releasably connect the cover and base. In a second aspect, the compartments of the container are closed off from one another such that the contents of a given compartment substantially remain therein, even after a perturbation of the container. In a third aspect, a divider separating the compartments is bowed to enhance the structural integrity of the base.Type: GrantFiled: September 30, 1997Date of Patent: June 9, 1998Assignee: Genpak CorporationInventors: Edward W. Rider, Jr., Alex Augustin
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Patent number: 5758794Abstract: A container closure for a container with a cover and a base. The cover includes a sidewall and a rim coupled to the sidewall. The rim includes a depression that takes the place of a male closure component. The base includes a sidewall and an opening in the sidewall for receiving the rim depression. The rim depression and receiving opening provide a snap-fit closure to releasably connect the cover and base.Type: GrantFiled: May 17, 1996Date of Patent: June 2, 1998Assignee: Genpak CorporationInventors: Edward W. Rider, Jr., Alex Augustin
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Patent number: 5681865Abstract: Low density PET foam is extruded by heating PET resin above the crystalline melt point to melt the resin, combining Heptane as the blowing agent with the PET resin to create a mixture, cooling the mixture to a temperature of less than 538.degree. K., and extruding the foam through a die. The Heptane is about 0.5-5% by weight of the mixture, and preferably about 1-3%.Type: GrantFiled: November 5, 1996Date of Patent: October 28, 1997Assignee: Genpak CorporationInventor: Walter R. Harfmann
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Patent number: 5679295Abstract: Low density PET foam is extruded by heating PET resin above the crystalline melt point to melt the resin, selecting a blowing agent combination, combining the blowing agent combination with the PET resin to create a mixture, cooling the mixture to a temperature of less than 538.degree. K., and extruding the foam through a die. The blowing agent combination is characterized by about 50 to less than 100 mole percent of a first blowing agent having a boiling temperature at STP of greater than 310.degree. K. The blowing agent combination is further characterized by more than 0 to about 50 mole percent of a second blowing agent having a boiling temperature at STP of less than 310.degree. K. The blowing agent combination has an equilibrium solubility vapor pressure in PET of less than 45 atm at the foaming temperature and greater than or equal to 1 atm at the glass transition temperature.Type: GrantFiled: July 11, 1996Date of Patent: October 21, 1997Assignee: Genpak CorporationInventor: Walter R. Harfmann
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Patent number: 5652277Abstract: There is disclosed a process for producing alkenyl aromatic foams utilizing a combination of atmospheric and organic gases as blowing agent, preferably using greater than 30% by weight of atmospheric gas, and preferably also using a predetermined about of a masterbatch mix comprising a styrenic polymer, a rubbery block copolymer, and a solid blowing agent. Also disclosed are alkenyl aromatic foams produced by the process which exhibit increased densities, increased thermoforming capabilities, increased post-expansion properties, and increased retainment of the atmospheric and organic gases.Type: GrantFiled: August 26, 1996Date of Patent: July 29, 1997Assignees: Reedy International Corporation, GenPak CorporationInventors: Michael E. Reedy, Edward W. Rider, Jr.
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Patent number: 5413239Abstract: A hinge made of a unitary structure which has two main projecting members and a space therebetween. The hinge is able to flex and has little biasing toward the open or closed positions.Type: GrantFiled: January 27, 1994Date of Patent: May 9, 1995Assignee: Genpak CorporationInventor: Edward W. Rider, Jr.
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Patent number: 5403865Abstract: The present invention relates to a process to produce polystyrene foam comprising mixing a predetermined amount of masterbatch mix and a styrenic polymer, heating this mixture, injecting CO.sub.2 and/or nitrogen, in gas or liquid form, as a blowing agent and subsequently extruding, cooling and drying the resulting polystyrene foam.Type: GrantFiled: August 26, 1994Date of Patent: April 4, 1995Assignees: Reedy International Corporation, Genpak CorporationInventors: Michael E. Reedy, Edward W. Rider, Jr.
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Patent number: 5342857Abstract: The present invention relates to a process to produce polystyrene foam comprising mixing a predetermined amount of masterbatch mix and a styrenic polymer, heating this mixture, injecting CO.sub.2 and/or nitrogen, in gas or liquid form, as a blowing agent and subsequently extruding, cooling and drying the resulting polystyrene foam.Type: GrantFiled: January 18, 1994Date of Patent: August 30, 1994Assignees: Reedy International Corporation, Genpak CorporationInventors: Michael E. Reedy, Edward W. Rider, Jr.
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Patent number: 4446986Abstract: A plastic fluid tight container and closure assembly comprising a plastic container having a base, a sidewall extending upwardly from the base terminating in a rim defining an opening for the container, said sidewall defining on its inside a sloping abutment surface extending inwardly and downwardly from said rim and an annular notch terminating said abutment surface, and a plastic closure having a circular cover portion, a U-shaped annular rim joined to the periphery of said cover portion, said U-shaped rim having an inner wall and a radially spaced outer wall connected by a base to said inner wall, the outside of said outer wall defining an annular shoulder positioned above the level of the base, an abutment surface extending upwardly and outwardly from the shoulder and an angular annular flange joined to the upper end of the outer wall to form an annular groove, said closure when assembled on said container having its shoulder locked to the notch of said container, its abutment surface in liquid sealing coType: GrantFiled: August 2, 1982Date of Patent: May 8, 1984Assignee: Genpak CorporationInventors: Gary D. Bowen, James L. Bowen
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Patent number: 4385711Abstract: An improved plastic container and closure comprising an open end container having a bottom and side wall extending upwardly therefrom; a cylindrical collar connected to the side wall through an annular transverse wall, the collar and annular transverse wall having at least one vertical slot therein, the side wall below the upper edge of the container having an external annular shoulder; and a closure defining a circular disk and a cylindrical skirt extending from the periphery thereof, the skirt on the inside thereof having an annular shoulder spaced from the disk a distance greater than the distance of the shoulder on the container from its upper edge so that when the closure is fitted over the container the skirt fits between the container wall and collar and the shoulder on the skirt snaps over the shoulder on the container to maintain the closure in a fitted position.Type: GrantFiled: July 24, 1981Date of Patent: May 31, 1983Assignee: Genpak CorporationInventors: James L. Bowen, Amelio J. Cocci
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Patent number: 4383954Abstract: Method and apparatus for continuously forming articles and stacking them ready for formation of batches from the stack. Some of the articles are treated by being given a disfigurement which makes them identifiable in the stack so that batch lengths containing predetermined numbers of articles are clearly seen. These disfigurements are caused by moving a moveable element forming part of the forming surface of the machine whereby the surface shape is changed to cause change in shape of the articles. The invention is particularly useful during forming and stacking of shallow thermoformed thermoplastic articles.Type: GrantFiled: April 6, 1981Date of Patent: May 17, 1983Assignee: Genpak CorporationInventor: Edward W. Rider, Jr.
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Patent number: RE38993Abstract: There is disclosed a process for producing alkenyl aromatic foams utilizing a combination of atmospheric and organic gases as blowing agent, preferably using greater than 30% by weight of atmospheric gas, and preferably also using a predetermined about of a masterbatch mix comprising a styrenic polymer, a rubbery block copolymer, and a solid blowing agent. Also disclosed are alkenyl aromatic foams produced by the process which exhibit increased densities, increased thermoforming capabilities, increased post-expansion properties, and increased retainment of the atmospheric and organic gases.Type: GrantFiled: October 3, 2000Date of Patent: February 28, 2006Assignees: Reedy International Corporation, Genpak CorporationInventors: Michael E. Reedy, Edward W. Rider, Jr.
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Patent number: D254776Type: GrantFiled: June 20, 1977Date of Patent: April 22, 1980Assignee: Genpak CorporationInventor: Richard T. Edwards
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Patent number: D263798Type: GrantFiled: June 11, 1979Date of Patent: April 13, 1982Assignee: Genpak CorporationInventor: Richard T. Edwards
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Patent number: D278800Type: GrantFiled: March 22, 1982Date of Patent: May 14, 1985Assignee: Genpak CorporationInventors: Gary D. Bowen, James L. Bowen
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Patent number: D335798Type: GrantFiled: March 18, 1991Date of Patent: May 25, 1993Assignee: Genpak CorporationInventors: William Crawford, Dick Edwards, Edward Rider, Jr., Stephen Susta, Jr.
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Patent number: D346528Type: GrantFiled: March 20, 1992Date of Patent: May 3, 1994Assignee: Genpak CorporationInventors: William R. Crawford, Stephen J. Susta, Jr.
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Patent number: D380648Type: GrantFiled: May 17, 1996Date of Patent: July 8, 1997Assignee: Genpak CorporationInventors: Edward W. Rider, Jr., Glenn Josef White