Thermal forming method for container

• Main Authors: TAKESHITA YASUO, NAKAZATO SHINSAKU, YOKOYAMA TOSHIYUKI
• Format: Patent
• Language: Chinese; English
• Published: 14.05.2008
• Subjects: ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING; CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS,e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES,DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; CONVEYING; HANDLING THIN OR FILAMENTARY MATERIAL; INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULARARTICLES; PACKAGES; PACKAGING ELEMENTS; PACKING; PERFORMING OPERATIONS; SADDLERY; SADDLES; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR; SHAPING OR JOINING OF PLASTICS; STIRRUPS; STORING; TRANSPORTING; UPHOLSTERY; WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL

The present invention provides a bottomed cylindrical container, comprising a body wall (2), a bottom wall (3), and a ring-shaped foot (4) downwardly extending from the bottom wall, said container being produced by thermo-molding a resin sheet, characterized in that said foot (4) is formed by folding an inner wall (7b) by compressed fluid to be fusion-bonded with an outer wall (7a), so as to form the foot (4) comprising the inner wall (7b) and the outer wall (7a). The present invention also provides a bottomed cylindrical container, comprising a body wall (31) having a grounding edge (33) at a lower end thereof, and a bottom wall (32), said container being produced by thermo-molding a resin sheet, characterized in that said bottom wall (32) connects with an upper edge (35) of an inner wall (34) produced by folding back the body wall (31) along the grounding edge (33) and by fusion-bonding it to an inner periphery of the body wall (31). In addition, the present invention provides the methods for thermo-molding