METHOD OF MAKING VACUUM CONTAINERS

• US 3,438,115 A
• Filed: 11/30/1967
• Issued: 04/15/1969
• Est. Priority Date: 11/30/1967
• Status: Expired due to Term

• Current Assignee: Harsco Corporation
• Original Assignee: Joseph G. Humphress, Robert L. Zeunik
• Inventors: Humphress, Joseph G., Zeunik, Robert L.
• Application Number:
  US04/690,046
• Time in Patent Office: 502 Days
• US Class Current: 29/419.2
• CPC Class Codes: A47J 41/022 Constructional details of the elements forming vacuum space
• CPC Class Codes: A47J 41/028 made of metal
• CPC Class Codes: B21D 26/14 applying magnetic forces
• CPC Class Codes: B21D 51/00 Making hollow objects from thick-walled or non uniform tubes B21K21/00
• CPC Class Codes: B65D 7/22 with double walls, e.g. double end walls for thermal insulating purposes B65D81/3806, B65D81/3818, B65D81/383
• CPC Class Codes: F17C 2201/0109 with exteriorly curved end-piece
• CPC Class Codes: F17C 2201/0114 with interiorly curved end-piece
• CPC Class Codes: F17C 2201/032 with substantially vertical main axis
• CPC Class Codes: F17C 2203/018 by attachment at the neck
• CPC Class Codes: F17C 2203/0391 by vacuum
• CPC Class Codes: F17C 2203/0629 Two walls
• CPC Class Codes: F17C 2203/0643 Stainless steels
• CPC Class Codes: F17C 2203/0646 Aluminium
• CPC Class Codes: F17C 2203/066 Plastics
• CPC Class Codes: F17C 2205/0305 Bosses, e.g. boss collars
• CPC Class Codes: F17C 2209/2163 with a mandrel
• CPC Class Codes: F17C 2209/227 by adhesive means
• CPC Class Codes: F17C 2209/23 Manufacturing of particular parts or at special locations
• CPC Class Codes: F17C 2223/0161 cryogenic, e.g. LNG, GNL, PLNG
• CPC Class Codes: F17C 2223/033 Small pressure, e.g. for liquefied gas
• CPC Class Codes: F17C 2260/011 : Improving strength
• CPC Class Codes: F17C 2260/031 : due to heat transfer
• CPC Class Codes: F17C 3/08 : by vacuum spaces, e.g. Dewar flask for household use A47J41/02
• CPC Class Codes: Y10S 220/918 : Spacing element for separating the walls of a spaced-wall container
• CPC Class Codes: Y10T 29/49803 : Magnetically shaping
• CPC Class Codes: Y10T 29/49927 : Hollow body is axially joined cup or tube

Claims