Easily folded and squeezed plastic paste tube

Abstract

This invention relates to a technique to make soft plastic paste tubes, popular consumer products of daily life, foldable and easily squeezed. The feature is to apply adhesive material in segments with protection films in an adhesive zone on the external surface of a plastic paste tube, from the head to the tail. The central line of the adhesive zone intersects the middle point of the tail end of the paste tube. When paste is consumed to a certain point, flatten the tail end, push the remaining paste toward the head, tear off a protection film to reveal an adhesive segment nearest to the tail end, and then fold up the flattened section forward 180 degree so that the flattened tail is glued onto the tube surface where the adhesive segment is located. Thus it prevents the folded section from stretching back out due to the plastic's tendency and squeezing pressure of consumers. As the amount of remaining paste decreases, keep flattening and folding repeatedly. The paste is, therefore, pushed forward and as a result, squeezing paste becomes easy and smooth from the beginning to the end, until the tube is depleted. The purpose of this invention is to make the usage of existing paste products with plastic tubes as easy and convenient to use as malleable metal tubes, which are now rarely manufactured.

1 . An easily folded and squeezed plastic paste tube comprised of a tube and the contained paste, adhesive segments  1  which are applied in the adhesive zone  4  on the external tube surface  3 , and protection film  2  that covers the adhesive segments.  
   
   
       2 . The adhesive segments and protection films of  claim 1 , wherein said segments  1  and films  2  are located between head to tail of the said tube  3  and along the axis of central line of said adhesive zone  4  intersecting the middle point of the tail end of the said tube.  
   
   
       3 . The adhesive zone of  claim 2 , wherein the width of said zone  4  is less than ½ perimeter of tube section, its length is shorter than that of the whole tube.  
   
   
       4 . The protection films of  claim 2  wherein films  2  can be made into multiple segments along the axis of said tube, but said segments should be limited to 50.  
   
   
       5 . The adhesive segments and protection films of  claim 1 , wherein said segments  1  and said films  2  are either manufactured on said tube surface  3 , or attached onto said tube surface  3  by a consumer before using the paste.