Paper-based container lids and methods for making the same

Abstract

A paper-based container lid comprises a top wall, a side wall connecting to the top wall, and a sealing channel formed on the side wall for sealingly engaging a rim of the container and securing the lid to the container, wherein the top wall and the side wall are preferably formed from separate blanks.

What is claimed is: 
     
         1 ) A lid for a container, comprising:
 a) a paperboard side wall formed from a first blank, wherein the side wall extends about a longitudinal axis and includes longitudinally opposed first and second ends; and   b) a paperboard top wall formed from a second blank, wherein the first blank is different from the second blank,
 i) wherein the top wall is connected to the side wall proximate the first end, and 
 ii) wherein the top wall includes an opening therein. 
   
     
     
         2 ) The lid for a container as recited in  claim 1 , further comprising a sealing channel formed in the side wall between the first end and the second end. 
     
     
         3 ) The lid for a container as recited in  claim 2 , wherein the sealing channel is projects radially. 
     
     
         4 ) The lid for a container as recited in  claim 1 , further comprising a substantially vertical seam between the first end and the second end of the side wall. 
     
     
         5 ) The lid for a container as recited in  claim 4 , wherein the seam is compressed. 
     
     
         6 ) The lid for a container as recited in  claim 4 , wherein the opening is positioned opposite of the seam. 
     
     
         7 ) The lid for a container as recited in  claim 1 ,
 a) wherein the side wall includes an inner surface, wherein the inner surface includes a polymer coating,   b) wherein the top wall includes a lower surface and an upper surface, wherein the lower surface and the upper surface each include a polymer coating,   c) wherein the upper surface of the top wall is connected to the inner surface of the side wall by a polymer-to-polymer bond, and   d) wherein the lower surface of the top wall is connected to the inner surface of the side wall by a polymer-to-polymer bond.   
     
     
         8 ) The lid for a container as recited in  claim 1 ,
 a) wherein a joint section is defined by where the first end of the side wall is connected to the top wall,   b) wherein the joint section includes a top end,   c) wherein the top end forms a lid rim, and   d) wherein the lid rim includes a substantially rounded section.   
     
     
         9 ) The lid for a container as recited in  claim 8 , wherein the substantially rounded section of the lid rim is oriented toward the longitudinal axis. 
     
     
         10 ) The lid for a container as recited in  claim 8 , wherein the joint section further includes a middle section below the top end, wherein the rim has a width associated therewith, wherein the middle section has a width associated therewith, and wherein the width of the rim is greater than the width of the middle section. 
     
     
         11 ) The lid for a container as recited in  claim 8 , wherein the joint section further includes a bottom end below the middle section, and wherein the bottom end flares toward the longitudinal axis. 
     
     
         12 ) The lid for a container as recited in  claim 8 , wherein the opening is located below the rim. 
     
     
         13 ) The lid for a container as recited in  claim 1 , wherein the top wall includes a debossed section, and wherein the opening is located within the debossed section. 
     
     
         14 ) The lid for a container as recited in  claim 13 , wherein the top wall includes an embossed section located adjacent to the debossed section. 
     
     
         15 ) The lid for a container as recited in  claim 2 , wherein a section of the side wall above the sealing channel is oriented toward the longitudinal axis and wherein a section of the side wall below the sealing channel is oriented away from the longitudinal axis. 
     
     
         16 ) A lid for a container, comprising:
 a) a paperboard side wall formed from a first blank, wherein the side wall extends about a longitudinal axis and includes longitudinally opposed first and second ends,
 i) wherein a sealing channel is formed in the side wall between the first end and the second end, 
 ii) wherein a substantially vertical seam is formed between the first end and the second end of the side wall, 
 iii) wherein the side wall includes an inner surface, wherein the inner surface includes a polymer coating; and 
   b) a paperboard top wall formed from a second blank, wherein the first blank is different from the second blank,
 i) wherein the top wall includes an opening therein. 
 ii) wherein the top wall includes a lower surface and an upper surface, wherein the lower surface and the upper surface each include a polymer coating, and 
 iii) wherein the top wall is connected to the side wall proximate the first end to define a joint section,
 (1) wherein the upper surface of the top wall is connected to the inner surface of the side wall by a polymer-to-polymer bond, and 
 (2) wherein the lower surface of the top wall is connected to the inner surface of the side wall by a polymer-to-polymer bond. 
 
   
     
     
         17 ) The lid for a container as recited in  claim 16 , wherein the sealing channel projects radially. 
     
     
         18 ) The lid for a container as recited in  claim 16 , wherein the seam is compressed. 
     
     
         19 ) The lid for a container as recited in  claim 16 , wherein the joint section includes a top end forming a lid rim having a substantially rounded section. 
     
     
         20 ) The lid for a container as recited in  claim 16 , wherein the top wall includes a debossed section, and wherein the opening is located within the debossed section.