METHOD FOR PRODUCING A FLEXIBLE CONTAINER HAVING A CLOSURE DEVICE

• Main Author: KROPF, Martin
• Format: Patent
• Language: English; French; German
• Published: 14.12.2016
• 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; PACKAGES; PACKAGING ELEMENTS; PACKING; PERFORMING OPERATIONS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR; SHAPING OR JOINING OF PLASTICS; STORING; TRANSPORTING; WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL

A weld-in part (1) is positioned between two film layers (12, 13) in the edge area of the latter and brought between a two-part tool (14, 15) whose tool parts (14, 15) are capable of being moved from an open position to a closed position substantially perpendicularly to the film layers (12, 13). The weld-in part (1) has a sealing region that is conical in longitudinal section, and the cross-sectional shape and the cone angle of the interior space of the closed tool (14, 15) correspond to the cross-sectional shape and the cone angle of the sealing region. After closing the tool (14, 15), the weld-in part (1) is moved parallel to the parting plane of the tool (14, 15) and brought into contact with the tool via the intermediate film layers (12, 13). In this manner, an accurate fit and a gapless enclosure of the parts that are to be connected (14, 15) is achieved in the tool independently of the dimensional tolerances of the weld-in part and of the film layers (12, 13).