Paper Lid And Method For Producing Paper Lid

Abstract

A paper lid with good usability includes a lid body portion that includes a paper material to be mounted on a container including an opening portion, a taper, and a curl portion. A first engaging portion is provided in the lid body portion and includes a taper in the same direction as a direction of the taper. The first engaging portion engages with the curl portion from outside the curl portion. A body portion side curl portion is provided in the lid body portion and is positioned above the first engaging portion.

1 . A paper lid including a lid body portion that includes a paper material to be mounted on a container including an opening portion, a taper, and a curl portion, and a top lid portion having an outer periphery surrounded by the lid body portion, the paper lid comprising:
 an engaging portion that is provided in the lid body portion, includes a tapered portion in the same direction as a direction of the taper of the container, and engages with the curl portion of the container from an outside of the curl portion of the container; and   a lid body portion side curl portion that is provided in the lid body portion and is positioned above the engaging portion,   wherein the outer periphery of the top lid portion is bent in a direction away from the lid body portion side curl portion, and a bent portion of the outer periphery of the top lid portion is bonded to the lid body portion,   wherein a part other than the outer periphery of the top lid portion is located between the engaging portion and the lid body portion side curl portion,   wherein a dimension of an inner diameter of a tip of the tapered portion is smaller than a dimension of an outer diameter of the curl portion of the container,   wherein in a state where the paper lid closes the opening portion of the container, the curl portion of the container is in contact with a tapered part that is an inner part of the tapered portion of the engaging portion.   
     
     
         2 . The paper lid according to  claim 1 ,
 wherein the top lid portion includes a drinking spout.   
     
     
         3 . The paper lid according to  claim 2 ,
 wherein a seam of the paper material and the paper material is formed in the lid body portion, and   the drinking spout is provided at a position where the drinking spout does not interfere with the seam.   
     
     
         4 . The paper lid according to  claim 2 ,
 wherein the lid body portion has a peripheral wall portion connected to the lid body portion side curl portion is provided on an outer periphery of the top lid portion, and   a display portion to which a plurality of displays related to a content of the container are applied is formed in the peripheral wall portion.   
     
     
         5 . The paper lid according to  claim 4 ,
 wherein the lid body portion side curl portion is deformable, and   the content is identified from the plurality of displays based on a deformation of the lid body portion side curl portion.   
     
     
         6 . The paper lid according to  claim 1 ,
 wherein the engaging portion deforms the curl portion of the container to engage with the curl portion.   
     
     
         7 . The paper lid according to  claim 1 ,
 wherein a size of the lid body portion side curl portion is different from a size of the curl portion.   
     
     
         8 . The paper lid according to  claim 1 ,
 wherein the top lid portion is provided with a view portion through which an inside of the container is visible.   
     
     
         9 . The paper lid according to  claim 2 , further comprising:
 a seal portion including a first joining portion to be joined to the drinking spout, and a pull-up portion with which the drinking spout is openable.   
     
     
         10 . The paper lid according to  claim 9 ,
 wherein the seal portion includes a second joining portion to be joined to the top lid portion, and   a joining force of the first joining portion is larger than a joining force of the second joining portion.   
     
     
         11 . The paper lid according to  claim 1 ,
 wherein a height from the lid body portion side curl portion to the top lid portion is from 36% to 53% of a height of the lid body portion.   
     
     
         12 . The paper lid according to  claim 1 ,
 wherein the engaging portion includes a protruding portion having a circumferential shape.   
     
     
         13 . The paper lid according to  claim 1 ,
 wherein the paper material of the lid body portion is coated with a biodegradable film.   
     
     
         14 .- 24 . (canceled)