摘要:
Es ist bekannt, bei Anlagen beispielsweise zum Herstellen und Befüllen von Beuteln für medizinische Zwecke ein Greifer System gegen die Maschinenrichtung am geschlossenen Schweißwerkzeug vorbeifahren zu lassen, um unter Zeiteinsparung die nachlaufende Folienbahn zu greifen. Die Erfindung schlägt vor, die Greifer mit einem Zusatzhub zu versehen, um abfallfrei medizinische Beutel produzieren zu können.
摘要:
Methods for forming a thermoplastic film with an attached closure strip are disclosed. The thermoplastic film can then be used to produce zippered reclosable plastic bags. The methods include providing a thermoplastic film web (10) having a sealing surface (12, 13) and providing a closure strip (21) having a binding surface (26, 36), both being maintained in a non-melted condition at room temperature. A heated thermoplastic binder layer (28a, 28b) is then extruded and positioned between the sealing surface (12, 13) of the film web (10) and the binding surface (26, 36) of the closure strip (21) very quickly after extrusion. The hot freshly extruded binder layer (28a, 28b) transfers enough heat to the closure strip (21) and to the film web (10) to melt the binding surface (26, 36) of the closure strip (21) and sealing surface (12, 13) of the film web (10). Pressure is then applied to the film web (10) and the closure strip (21) to seal the closure strip (21) to the film web (10). An apparatus (40, 50) for practicing the method at high speed is also disclosed.
摘要:
A structure of an air vent passage of a sealed bag used for the sealed bag (1) and allowing the passing of airstream in a forward direction and cutting off the airstream in a reverse direction by opening and closing an airstream passing space (3a) when a gas is discharged therefrom or charged therein. The structure comprises bag sheets (11) and (12) disposed oppositely to each other, a valve element sheet (31), and an clearance holding member (32). The adhesive part (31b) of the valve element sheet (31) is disposed on the upstream side of the airstream (F1) in the forward direction, a movable part (31c) is disposed on the downstream side thereof, and the clearance holding member (32) is disposed between the inner surfaces (11a) and (12a) of the bag sheets (11) and (12) and the valve element sheet (31). Thus, a clearance for the clearance holding member (32) can be held at least partly between the inner surfaces (11a) and (12a) of the bag sheets (11) and (12) and the valve element sheet (31).
摘要:
An assembly of sliders (10) for zippers (12) for plastic bags (36) and the like and the accumulation of the sliders (10) for use in form, fill and seal machines (26) is disclosed. The sliders (10) are oriented and mechanically or adhesively joined into chains (52). Mechanical assembly of sliders (10) may be accomplished by snapping sliders (10) together or slideably mounting sliders (10) on a strip (96). Sliders (10) may be adhesively assembled together by taping (60), welding, gluing, or melting the sliders (10). Sliders (10) and chains (52) of sliders (10) are accumulated in cartridges (102, 110), carriers, coreless rolls (116), spools (114, 122) or trays which are then connected to form, fill and seal machines (26) for attachment of the sliders (10) to a zipper (12) and attachment of the zipper (12) with a slider (10) to bags (36).
摘要:
The invention concerns a method for making bags using a continuously unwinding film provided with at least a strip (60) with opening/closing function arranged on the film (12). The invention is characterised in that it comprises at least a sensor (100) capable of detecting the presence of the strip (60) with opening/closing function in a predetermined position relative to the means (30) for cyclic treatment of the film for forming the bag, in particular means (30) for transversely fixing the film constituting the bag, provided on the device.
摘要:
The invention relates to a method and a device for interlocking stackwise plastic bags, especially bags for automatic machines, by welding, wherein welding is effected by an interlocking device (21) integrated into the grip hand (17) of a robot (16) with the purpose of simplifying welding.
摘要:
A method and apparatus for making reclosable plastic bags is provided. In the method and apparatus, a fastener (10) is attached to a moving flat web of plastic film (50), preferably in the direction of web movement and near the center of the web. A plurality of sliders (40) are mounted to the fastener either before or after the fastener is attached to the flat web, but prior to conveying the web to a FFS machine. The flat web, with the slider-operated fastener already attached thereto, is then conveyed to a vertical or horizontal FFS machine where the flat web is formed into bags (80), and the bags are successively filled (81) and sealed (84).