摘要:
An installation for producing bags from two-layer plastic film includes a film gripper for drawing the plastic film into a tool at a first station, and a rotary conveyor belt for conveying the film through a plurality of stations. The film gripper is designed to guide the plastic film through the first station to a second station.
摘要:
A method (100) for making a flat bottom bag (800) with a valve (28) is provided. The method (100) includes overlapping and sealing the two longitudinal edges (11a and 11b) of a web (10) to form a continuous tube (12). The method includes cutting-off the continuous tube into tube pieces (14) in accordance with desired bag length such that each tube piece (14) has at least a first open end (18) and a second open end (22). The method (100) includes forming a first pair of flaps (F1, F2) and a second pair of flaps (F3, F4) on the first open end (18) and the second open end (22) respectively. The method (100) includes providing a valve (28) on the second pair of flaps (F3, F4) on the second open end (22). The method (100) includes folding and flattening both the pairs of flaps (F1, F2 and F3, F4) so that the edges of the flaps meet at the centre. The method (100) includes sealing a pre-cut cover patch (30) onto the folded and flattened pairs of flaps (F1, F2 and F3, F4) to close the open ends (18, 22).
摘要:
This invention relates to a paper bag for bulk material such as cement, gypsum, granular material, animal feed or the like, with a bottom and with an upper part opposite the bottom, wherein bottom and/or upper part are folded and glued by closing up the side parts around side fold lines, in particular in the form of a cross or block bottom, wherein for gluing the side parts at least one gluing or bonding agent activatable after the application is provided, which is applied continuously at least from a side fold line up to at least the opposite side fold line of the side parts.
摘要:
Methods of manufacturing a valve bag are disclosed. First and second webs of valve material, such as heat sealable plastic film, are combined to create a combined web of valve material, and a sealing process is applied thereto to define valve portions. The combined web of valve material includes a plurality of valve strip portions, each including a valve portion. Then first and second bag sections, which may be on a first and second side respectively of a web of folded bag material, or on a first web and second web of bag material respectively, are dispensed with the combined web of valve material positioned in between, and brought together to form a combined web of valve bag material. A sealing process is applied to the combined web of valve bag material, forming a valve bag section. The bag section is then separated from the remainder of the combined web of valve bag material to form an individual valve bag.
摘要:
There is provided a device for attaching a one-way type pouring nozzle, which includes a simple and small-size mechanism capable of efficiently fusion-joining the one-way type pouring nozzle to a film for package bag. In this device, a nozzle template film formed with a plurality of one-way type pouring nozzles templated by tear-inducing flaws is fed to a continuously running film for package bag to fusion-join a base portion of each of the one-way type pouring nozzles through its outer sealant layer to an inner sealant layer on one-sided portion of the film for package bag, while an unwanted portion of the nozzle template film is cut out and removed. The device also includes a pair of fusion rollers pushing and fusion-joining the one-way type pouring nozzle in the nozzle template film to the running film for package bag under the running at equal speed, and the fusion roller pair is constituted with a heating roller always energizing toward the side of the running path of the film for package bag, and a heat roller for attachment provided with protrusions intermittently pushing the film for package bag to positions of one-way type pouring nozzles in the nozzle template film on the heating roller.
摘要:
A fluid container for packing a product includes a check valve for each container member. A bonding structure of check-valves to a fluid container and a production apparatus of fluid container are disclosed in detail where the check valve is capable of reliably keeping the expansion of the fluid container without any fluid leakage after inflating the fluid container. As the check-valve is bonded to only one of thermoplastic container films, both films of the check-valve are fixed to one of the container films at a plurality of seal portions, thereby preventing the reverse flow by tightly closing the check valve. The plurality of seal portions in a flow pass of the fluid disrupt the fluid flow so as to add resistance to the fluid flow.
摘要:
There is provided a device for attaching a one-way type pouring nozzle, which includes a simple and small-size mechanism capable of efficiently fusion-joining the one-way type pouring nozzle to a film for package bag. In this device, a nozzle template film formed with a plurality of one-way type pouring nozzles templated by tear-inducing flaws is fed to a continuously running film for package bag to fusion-join a base portion of each of the one-way type pouring nozzles through its outer sealant layer to an inner sealant layer on one-sided portion of the film for package bag, while an unwanted portion of the nozzle template film is cut out and removed. The device also includes a pair of fusion rollers pushing and fusion-joining the one-way type pouring nozzle in the nozzle template film to the running film for package bag under the running at equal speed, and the fusion roller pair is constituted with a heating roller always energizing toward the side of the running path of the film for package bag, and a heat roller for attachment provided with protrusions intermittently pushing the film for package bag to positions of one-way type pouring nozzles in the nozzle template film on the heating roller.