摘要:
A dunnage bag is fabricated of thermoplastic sheet material joined together to form an air cushion including being joined to form an inflation panel edge seam. An inflation opening to the air cushion is defined between two layers of thermoplastic sheet material adjacent a terminus of the panel edge seam. Two layers of the thermoplastic sheet material extend from the inflation panel edge seam and inflation opening, and the two layers are joined together by an inflation panel seam pattern to form an inflation panel. The inflation panel seam pattern further defines an inflation area communicating with the inflation opening and with an inflation valve sealed to the inflation panel in the inflation area, for supplying inflation air from the inflation valve through the inflation panel and into the air cushion. The inflation area is preferably an elongated sinuous tube. This configuration protects the inflation valve and contributes to the integrity of the dunnage bag. The thermoplastic sheet material is substantially transparent, so that cargo inspections may be made without removing the dunnage bags.
摘要:
The subject of the invention is a package comprising at least two sheets (2, 3) and two flexible films (10a, 10b) placed between them and welded to the sheets (2, 3) by the welds (11a, 11b) respectively, and welded together and to the sheets (2, 3) by the welds (12a, 12b), at least one of the two films being folded over the other at that end of the films on the opposite side to the welds (11a, 11b).The subject of the invention is also a method for manufacturing such a package.The invention makes it possible to obtain a package of simplified structure and simplified manufacture.
摘要:
A pressure control valve for a packaging container includes a supporting body having a recess a is disposed in an axially captive fashion either by means of gluing or by means of securing projections A device for attaching the pressure control valve to a material web has a stroke die and a sealing die that cooperates with the stroke die and contains a needle holder for producing holes in the material web.
摘要:
A container (10) having a valve flap (20) which is movable between a closed position, whereat it is seated on the seating area (18) to close an evacuation port (16), and an opened position, whereat it is unseated from the seating area (18) to open the evacuation port (16). A label structure (26) includes a film layer (28) forming a seat platform on which a seating area (18) is located and/or a film layer (30) forming a flap platform on which the valve flap (20) is located. A plurality of label structures (26) can be efficiently and economically mass-produced by a label-manufacturer and then supplied to the container-manufacturer for incorporation into the containers (10).
摘要:
In the pouch of the present invention in which a pouring spout (3) is formed by means of a heat-sealed part (2) and a non-heat-sealed part (6) by heat sealing plastic films, the inside surfaces of the films that form the portion of the boundary area (Y) between the heat-sealed part (2) and non-heat-sealed part (6) of the pouring spout passage (4) on the side of the non-heat-sealed part (6) contact each other so that no gaps are left in a closed state. Accordingly, even if the pouch is suspended with the pouring spout (3) down following the opening of the pouring spout (3), the leakage of the contents such as a liquid or the like accommodated in the interior of the pouch from the pouring spout (3) a small amount at a time can be securely prevented. The gap-free contact of the inside surfaces of the films can be accomplished by uniformly pressing the films in the boundary area (Y). Furthermore, in the pouch manufacturing method of the present invention, a valve member (103) which restricts the movement of the contents when the pouch is formed is conveyed in accordance with the conveying of web-form body members (101, 102) that form the pouch, and this valve member (103) is welded to the body members (101, 102) in a state in which a sealing preventing member (106) is interposed on the side on which the contents pass through; accordingly, pouches that have a valve function such as a reverse flow preventing function or the like can be continuously manufactured. In addition, in this pouch manufacturing method, in cases where a branched part (254) if formed by folding back at least one side part of a web-form body member (240) at a fold-back line running along the feeding direction of this body member, the body member (240) is guided by a guide so that the pass line length of a portion occupying an arbitrary position is substantially constant from the initiation of fold-back to the completion of fold-back; accordingly, a natural and favorable fold-back can be achieved without generating any slack or wrinkles in the web, so that pouches such as pouches having a branched part (254) can be manufactured with a favorable appearance and commercial properties.
摘要:
An insertable airway member (700, 1200, 1300) provides an escape path for air during evacuation of a heat-sealable bag (600) to protect a perishable or vacuum-packable item (1000). The member (700) extends from the open edge (602) of the bag inwardly to the contents being sealed in the bag. The member is made of flexible, woven plastic mesh with open cells (800) comprising fiber strands (705) and knots (805) with holes (900). In an alternative embodiment, the airway member (1200, 1300) is rigid or semi-rigid and provided with channels (1205) or grooves (1305) to permit the escape of air from the bag during evacuation. The bag is evacuated and then heat-sealed. During heat-sealing of the bag, the sandwich comprising the airway member and the opposed sides of the bag near its open edge are forced together by heated clamps (22) of a known heat-sealing apparatus (400). The softened or melted plastic material comprising the inner layer of the bag fills voids in the airway member, optionally melting it as well, thus sealing the bag against the incursion of air.
摘要:
Longitudinally continuous sheets 11, 12, 31, 32 as a plurality of components are continuously supplied in a longitudinal direction to lie one upon another, and adhered at predetermined spots to form an article containing portion 2 having a space for an article and an air passageway 3 having a space continuing to the space of the article containing portion 2. Said sheets are a frontal sheet 11, a rear sheet 12 which is equal to the frontal sheet 11 in breadth, i.e. the transverse side dimension of the sheets, at least one valve body sheet 31 disposed between said both sheets 11 and 12 and made smaller than the sheets 11, 12 in breadth and base members 32 disposed between at least one of the frontal and rear sheets 11, 12 and the valve body sheet 31 and made smaller than the valve body sheet 31 in breadth.
摘要:
The pocket valve for a bag consists of a tube of plastics material sheeting, which tube is open in a portion of its length at its inner end along the two side edges. The lower of the two resulting flaps is backfolded and adhered to the corner tuck of the valve corner of the bag.