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US6663927: Heat insulating paper cups

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Filing Information

Inventor(s) Michael A. Breining · William R. Pucci · David C. Brown · Richard A. Segan · Donald C. McCarthy · Walter Malakhow ·
Assignee(s) Fort James Corporation ·
Attorney/Agent(s) Finnegan, Henderson, Farabow, Garrett & Dunner, LLP ·
Primary Examiner Sandra M. Nolan ·
Application Number US10176678
Filing date 06/24/2002
Issue date 12/16/2003
Prior Publication Data
Predicted expiration date 06/06/2017
U.S. Classifications 428/342  · 428/537.5  · 428/365  · 428/159  · 428/349  · 428/511  · 229/403  · 493/84  · 493/93  · 493/95  · 493/96  · 493/99  · 229/400  ·
International Classifications --
Kind CodeB2
International Classifications 229400 · 229403 · 428 342 · 428 365 · 428159 · 428349 · 428511 · 4285375 · 493 84 · 493 93 · 493 95 · 493 96 · 493 99 ·
Related U.S. Application DataThis is a continuation of application Ser. No. 08/870,486, filed Jun. 6, 1997, now U.S. Pat. No. 6,416,829. which is incorporated herein by reference.
5 Claims, 3 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 (5)

  1. 1. A heat insulated container comprising a cellulose base and modified low density polyethylene on one surface of the base wherein said low density polyethylene is blended with enough non-low density polyethylene to prevent a laminate of the modified low density polyethylene from foaming at temperatures greater than 240° F.