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US6129653: Heat insulating paper cups

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Filing Information

Inventor(s) Richard E. Fredricks · Michael A. Breining · William R. Pucci · Donald C. McCarthy · David C. Brown · Richard A. Segan · Walter Malakhow ·
Assignee(s) Fort James Corporation ·
Attorney/Agent(s) Burns, Doane, Swecker & Mathis, L.L.P. ·
Primary Examiner Eugene Kim ·
Application Number US9087956
Filing date 06/01/1998
Issue date 10/10/2000
Predicted expiration date 06/06/2017
U.S. Classifications 493/110  · 493/903  ·
International Classifications B31B 100  ·
Kind CodeA
International Classifications 49352;110;903 ·
Related U.S. Application DataThis application is a continuation-in-part application of U.S. Ser. No. 08/870,486, filed Jun. 6, 1997, the contents of which are hereby incorporated by reference.
20 Claims, No Drawings


Abstract

A heat insulating paper cup having an improved seal. The cup can include a body member having an inside surface and an outside surface, and a bottom panel member having a upper surface and a bottom surface. The body member is coated (or in some instances partially coated) on its outside surface with a foamed low density polyethylene, and on its inside surface with an unfoamed modified low density polyethylene. The bottom panel member is coated on its upper surface with a foamed or an unfoamed low density polyethylene or foamed or unfoamed modified low density polyethylene. The body member and bottom panel member are oriented and joined to form a heat seal at an interface between a portion of the unfoamed modified low density polyethylene coated on the inside surface of the body member and a portion of unfoamed low density polyethylene or unfoamed modified low density polyethylene coated on the upper surface of the bottom panel member.

Independent Claims | See all claims (20)

  1. 1. A method for fabricating a heat insulating paper container from a paper-based body member with an inside surface and an outside surface, and a paper-based bottom panel member with an upper surface and a bottom surface, said method comprising:applying to the inside surface of said body member an inside surface laminate of a polyethylene component effective to prevent penetration of liquid into the paper during use, and applying to said outside surface an outside surface laminate of foamable low density polyethylene, wherein the inside surface laminate is selected from a material effective to form an improved seal between the bottom panel member and the body member of a twelve ounce cup fabricated at a speed of about 165 cups/minute by a HORAUF MODEL BMP-200 machine with temperature controls set at between about 350.degree. to about 460.degree. C. and a bottom expansion pressure set at about 3000 kilopascals for two revolutions per cup; andfabricating said container so that said body member is bonded to said bottom panel member, and said outside surface laminate of low density polyethylene is foamed.
  2. 3. A method for fabricating a heat insulating paper container from a paper-based body member with an inside surface and an outside surface, and a paper-based bottom panel member with an upper surface and a bottom surface, said method comprising:applying to the inside surface of said body member an inside surface laminate of a modified low density polyethylene which is not foamable under fabrication conditions, applying to said outside surface of said body member an outside surface laminate of low density polyethylene which is foamable under fabrication conditions, and applying to the upper surface of said bottom panel member a low density polyethylene or modified low density polyethylene; andorienting and joining said bottom member and said body panel member to form a heat seal at an interface between a portion of the unfoamed modified low density polyethylene coated on the inside surface of the body member and a portion of the low density polyethylene or the modified low density polyethylene coated on the upper surface of the bottom panel member,wherein the modified low density polyethylene is selected from materials effective to provide an improved seal between the bottom panel member and the body member of a twelve ounce cup fabricated at a speed of 165 cups/minute by a HORAUF MODEL BMP-200 machine with temperature controls set at between about 350.degree. to about 460.degree. C. and a bottom expansion pressure set at about 3000 kilopascals for two revolutions per cup.

References Cited

U.S. Patent Documents

Document NumberAssigneesInventorsIssue/Pub Date
US4435344 Nihon Dixie Company, Limited Iioka Mar 1984
US5145107 International Paper Company Silver et al. Sep 1992
US5363982 SADLIER CLAUS E Sadlier Nov 1994
US5490631 Nihon Dixie Company Limited Ioka et al. Feb 1996
US5725916 Nihon Dixie Company Limited Ishii et al. Mar 1998
US5766709 James River Corporation of Virginia Geddes et al. Jun 1998

Foreign Patent Documents

Document NumberAssigneesInventorsIssue/Pub Date
JP234170Aug 1994

Referenced By

Document NumberAssigneeInventorsIssue/Pub Date
US8622208 --
US8622232 --
US8828170 --
US8715449 --
US6663927 Fort James Corporation Michael A. Breining et al. Dec 2003
US7536767 Prairie Packaging, Inc. Robert W. Hollis et al. May 2009
US6662996 Georgia-Pacific Corporation Timothy P. Hartjes Dec 2003
US7121991 Solo Cup Operating Corporation Dean Joseph Mannlein et al. Oct 2006
US7537136 Laurent Hechmati May 2009
US7597246 The Ovenable Paper Pan Company, LLC William Joseph Stepanek, Jr. Oct 2009
US6536657 Fort James Corporation Gerald J. Van Handel Mar 2003
US7464856 Dixie Consumer Products LLC Gerald J. Van Handel Dec 2008
US7464857 Dixie Consumer Products LLC Gerald J. Van Handel Dec 2008
US6703090 Fort James Corporation Michael A. Breining et al. Mar 2004
US6908651 Sanyo Pax Kabushiki Kaisha Hiromi Watanabe et al. Jun 2005
US7290679 HECHMATI LAURENT Laurent Hechmati Nov 2007
US7513386 Dixie Consumer Products LLC Timothy P. Hartjes et al. Apr 2009
US6749913 Sanyo Pax Kabushiki Kaisha Hiromi Watanabe et al. Jun 2004
US7600669 Dixie Consumer Products LLC Gerald J. Van Handel Oct 2009
US7614993 Dixie Consumer Products LLC Gerald Van Handel Nov 2009
US7195805 Dixie Consumer Products LLC Michael A. Breining et al. Mar 2007
US7510098 Dixie Consumer Products LLC Timothy P. Hartjes et al. Mar 2009
US6676586 Fort James Corporation Michael A. Breining et al. Jan 2004
US6729534 Fort James Corporation Gerald J. Van Handel May 2004
US7451911 The Ovenable Paper Pan Company, LLC William Joseph Stepanek, Jr. Nov 2008
US7694843 Prairie Packaging, Inc. Robert W. Hollis et al. Apr 2010
USD613554 Solo Cup Operating Corporation Weston Koennecke Apr 2010
US7704347 Prairie Packaging, Inc. Robert W. Hollis et al. Apr 2010
USD624788 Solo Cup Operating Corporation Weston Koennecke Oct 2010
US7814647 Prairie Packaging, Inc. Robert W. Hollis et al. Oct 2010
US7818866 Prairie Packaging, Inc. Robert W. Hollis et al. Oct 2010
US7841974 Dixie Consumer Products LLC Timothy P. Hartjes et al. Nov 2010
US7117066 Solo Cup Operating Corporation Dean Joseph Mannlein et al. Oct 2006
US7552841 Prairie Packaging, Inc. Robert W. Hollis et al. Jun 2009
US7913873 Dixie Consumer Products LLC Gerald J. Van Handel Mar 2011
US7918016 Prairie Packaging, Inc. Robert W. Hollis et al. Apr 2011
US7918005 Prairie Packaging, Inc. Robert W. Hollis et al. Apr 2011
US7938313 Dixie Consumer Products LLC Gerald J. Van Handel May 2011
USD639606 Solo Cup Operating Corporation Weston Koennecke Jun 2011
US8052039 The Ovenable Paper Pan Company, LLC William Joseph Stepanek, Jr. Nov 2011
US8087147 Prairie Packaging, Inc. Robert W. Hollis et al. Jan 2012