Insulator sleeve for a thermos bottle

Abstract

An insulator sleeve includes: a seamed cylindrical body having top and bottom open ends, the seamed cylindrical body including an annular folded insulator wall of an insulator material, and an annular folded surface layer attached to the folded insulator wall, the folded insulator wall extending from the top open end to the bottom open end of the seamed cylindrical body, and having an outer surface, a folded end, and two free ends that are substantially flush with each other, the folded surface layer covering the outer surface of the folded insulator wall, and having a folded end that cooperates with the folded end of the folded insulator wall to define the top open end of the seamed cylindrical body; and a base secured to the bottom open end of the seamed cylindrical body.

1 . An insulator sleeve for a thermos bottle, comprising:
 a seamed cylindrical body having top and bottom open ends respectively defining top and bottom openings, said seamed cylindrical body including an annular folded insulator wall of an insulator material and an annular folded surface layer attached to said folded insulator wall, said folded insulator wall extending from said top open end to said bottom open end of said seamed cylindrical body, and having an outer surface, a folded end, and two free ends that are substantially flush with each other, said folded surface layer covering said outer surface of said folded insulator wall, and having a folded end that cooperates with said folded end of said folded insulator wall to define said top open end of said seamed cylindrical body; and   a base secured to said bottom open end of said seamed cylindrical body for covering said bottom opening of said seamed cylindrical body.   
   
   
       2 . The insulator sleeve of  claim 1 , wherein said folded insulator wall includes annular inner and outer wall portions that respectively define said free ends of said folded insulator wall and that are stacked and are adhesively bonded together. 
   
   
       3 . The insulator sleeve of  claim 2 , wherein said base and said seamed cylindrical body are stitched together. 
   
   
       4 . The insulator sleeve of  claim 2 , wherein said base includes a circular two-layered insulator wall of said insulator material, and inner and outer surface layers, said two-layered insulator wall of said base having inner and outer wall surfaces, said inner and outer surface layers being respectively attached to said inner and outer wall surfaces of said two-layered insulator wall of said base. 
   
   
       5 . The insulator sleeve of  claim 2 , wherein said base is formed with a vent hole. 
   
   
       6 . A method for making an insulator sleeve, comprising:
 attaching a surface layer to an insulator sheet of an insulator material;   folding the assembly of the surface layer and the insulator sheet into symmetrical halves such that the folded halves of the insulator sheet are sandwiched between the folded halves of the surface layer;   scrolling and stitching the folded symmetrical halves of the assembly of the surface layer and the insulator sheet into a cylindrical body; and   securing a base to a bottom open end of the cylindrical body.   
   
   
       7 . The method of  claim 6 , further comprising bonding adhesively the folded halves of the insulator sheet together prior to the scrolling operation. 
   
   
       8 . The method of  claim 6 , wherein the base is secured to the bottom open end of the cylindrical body by stitching. 
   
   
       9 . The method of  claim 6 , wherein the base includes inner and outer surface layers, and a circular two-layered insulator wall of said insulator material sandwiched between the inner and outer surface layers.