Side sealing apparatus

A side sealing apparatus (10,100) for a shrink packaging machine comprising closed loop temperature control of a heater (28) for maintaining an optimum temperature for cutting and sealing two layers of thermoplastic film (42). The heater comprises a cable or cartridge heater with an internal thermoc...

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Bibliographische Detailangaben
Hauptverfasser:	LINDBERG, JEFFREY, JAMES, FRANK ALBERT, MANFREDI, CHARLES, GILBERT, JOHN J
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING CONVEYING HANDLING THIN OR FILAMENTARY MATERIAL HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS,CABLES MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGINGARTICLES OR MATERIALS PACKING PERFORMING OPERATIONS PNEUMATIC TUBE CONVEYORS SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR SHAPING OR JOINING OF PLASTICS SHOP CONVEYOR SYSTEMS STORING TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING ORTIPPING TRANSPORTING UNPACKING WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
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Beschreibung
Zusammenfassung:	A side sealing apparatus (10,100) for a shrink packaging machine comprising closed loop temperature control of a heater (28) for maintaining an optimum temperature for cutting and sealing two layers of thermoplastic film (42). The heater comprises a cable or cartridge heater with an internal thermocouple, and it is connected to an automatic temperature controller(38). The heater is mounted on the side sealer apparatus between two sets of top and bottom V-belts (15,16,21,22) mounted around drive rolls and idler rolls(12,14,18,20). The V-belts provide nip pressure against the film in order to drive the film. In one embodiment, nip pressure is generated by nip rollers (24a-e, 124a-e) on the scrap side of the film, and by low friction belt support guides on the package side of the film. In another embodiment, the belt support guides are replaced with a series of upper and lower nip rollers, and adjustable toggle clamps (104) provide adjustable pressure on the series of upper and lower nip rollers.