Manufacturing container or tube from paper; or other manufacturi – Container making – Pliable container
Patent
1982-09-07
1985-01-15
Simmons, David
Manufacturing container or tube from paper; or other manufacturi
Container making
Pliable container
156 70, 383 75, B65D 3328
Patent
active
044936834
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
The present invention relates to a method of manufacturing from flexible material bag-like packaging blanks provided with closure ribbons, said method consisting of feeding a belt of packaging blanks arranged one after the other and capable of being separated from each other and cooperating with guide devices for opening the packaging blanks, each of the opposing side walls of the blank belt being provided in the vicinity of the openings of the packaging blanks with at least one channel extending in the longitudinal direction of the packaging belt, and at least one closure ribbon, which has been shortened, for instance, by folding, being arranged in the channel.
PRIOR ART
From the prior art it is known the use of bag-like packages of flexible material, e.g. plastic film, in which each package is provided with a number of endless closure ribbons which run in channels adjacent to the opening of the package. In addition to providing a means of closing the package, the ribbons are often also used as a hanging device. This type of package is used particularly for health products, such as cotton wool, paper handkerchieves and bath salts, etc.
The use of the aforesaid packages has been limited to a certain extent by their price. The high unit cost of the packages is due to the absence of a simple and expedient method of providing the packages with the endless closure ribbons. Thus, the use of packages with closure ribbons results in high packaging costs, which are often almost twice as high as the cost of using packages without closure ribbons.
Previously disclosed in Swedish Pat. No. 189 062 is a method for providing bags with loops or tunnels for drawstrings, whereby the walls of the bag are welded together at its opening. The patent provides no solution for inserting the strings in the tunnels and for attaching the sections of string to each other. A device for manufacturing bags with drawstrings is described in Swedish Pat. No. 189 583, in which the blank belt is provided with cut-outs for the subsequent exposure of the strings, although the blank belt has no upper edge areas with suspension devices intended to cooperate with special guiding devices designed to exposure sections of string so that they may be attached to each other and cut off. Instead of cut-outs, Danish Pat. No. 100 014 proposes that holes be produced through the blank belt enabling the strings to be exposed. According to Finnish Pat. No. 51 068 cut-outs are also produced in the belt from which ribbons are drawn out to form loops, said ribbons being joined together in pairs at the same time as transverse joints are produced in the belt so as to form bags. British Pat. No. 1,509,639 also describes a device for the filling of bags made of textile material and arranged in a continous line, although it makes no mention of closure ribbons or of the fact that the packaging blanks are to be provided with channels for such closure ribbons. Also, the line of blanks in accordance with the latter mentioned patent is not provided with strip-like edge areas incorporating suspension devices which cooperate with guide devices for the purpose of exposing the closure ribbons so that they may be attached to each other.
SUMMARY OF THE INVENTION
An object of the present invention is to produce packages provided with closure ribbons by a new method, which provides considerably reduced packaging costs compared with previously used techniques, and which is simple and reliable in operation with the closure ribbons between the packages being easily accessible to welding jaws or other fixing devices. The operation of the method produces no loops in the ribbons and calls for no devices for deflecting the ribbon away from the belt, as is required in the arrangements which have already been known.
The invention is characterized principally in that adjacent to its free edges the blank belt is provided with opposing strip-like areas in the vicinity of the edges, which areas link the packaging blanks together and which provide suspension means
REFERENCES:
patent: 2897729 (1959-08-01), Ashton et al.
patent: 3592379 (1971-07-01), Nakamura
patent: 3687357 (1972-08-01), Hansen
patent: 3772968 (1973-11-01), Ruder
patent: 4260003 (1981-04-01), Hendrickson
Joker System Aktiebolaget
Simmons David
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