US 3567110 A
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United States Patent  Inventors Rinnosuke Susuki Tokyo; Hiroshi Hoshi, Chiba-ken; Shinichi Araki; Takashi Ohshita, Tokyo; Shinzo Miyamoto,
 SEALED BAG HAVING A PAIR OF HANDLES ATTACHED TO TWO FOLDED END PORTIONS AND RETAINED THEREAFTER THE CONTENTS ARE DISPENSED 4 Claims, 7 Drawing Figs.  US. Cl. 229/54, 1 50/12  Int. Cl 865d 33/06  Field of Search 229/54; 150/ l 2 Primary Examiner-David M. Bockenek Attorney-Cushman, Darby and Cushman ABSTRACT: By first folding inwardly one closed end of a tube made of a synthetic resin to form opposing folded end portions, thereafter thermally bonding or adhesively attaching a thick piece of plate made of a synthetic resin to each of said end portions either on the inside or outside of the fold or between the two sheets of the tube constituting the fold, then forming a grip hole in each of the attached two pieces of plate (said grip hole may be formed in advance), thereafter packing desired contents in said tube from the open end on the other side of the tube, and then sealing this open end, there is provided a bag having a pair of grip handles which are retained on the bag after the portion of the tube material located between the folded two end portions is cut apart to dispense the contents.
SHEET 1 [IF 2 FIG.2
PATENTEUVHAR 2197i SHEET 2 [IF 2 FIG.7
SEALED BAG HAVING A PAIR OF HANDLES ATTACHED TO TWO FOLDED END PORTIONS AND RETAINED THEREAFTER TI'IE CONTENTS ARE DISPENSED BACKGROUND OF THE INVENTION l. Field of the Invention The present invention is concerned with a bag, and more particularly, it relates to a bag having a pair of grip handles securely attached to two folded end portions extending outwardly from one closed end of the bag which is intended for containing detergent, foods, drugs or the like in the form of powder.
1. Description of the Prior Art I There are a variety of bags made of synthetic resin and having a pair of grip handles attached to one end of the bags. However, these bags of the prior art invariably are provided with a sealed portion extending transversely of the bag close to one end of the bag, said sealed portion being formed after the bag has been packed with contents. The grip handles are attached to the portions of the tube material on the side closer to the end of the bag from the aforesaid seal line. For this reason, when the bag is cut open along the seal line, the grip handles are alsoseveredfrom the body of the bag, and as a result, the grip handles no longer serve as handles.
SUMMARY OF THE'INVENTION It is, therefore, the primary object of the present invention to improve or eliminate the aforesaid disadvantage and shortcoming of the grip handles of bags of the prior art and to provide a novel bag having a pair of grip handles which are retained in place even after the bag material located between the grip handles is cut open to dispense the contents and which permit the user to continuously utilize the bag for shopping or like purposes.
Another object of the present invention is to provide a bag of the type described made of a-synthetic resin, which is used as a package that is capable of perfectly insulating the contents from external moisture.
Still another object of the present invention is to provide a bag of the type described which can be easily manufactured on a mass production basis in continuous manufacturing process. These and other objects together with the attendant advantages will become apparent by reading the following detailed description in conjunction with the accompanying drawings.
It should be understood that like parts in each of the embodiments are indicated by like reference numerals for the simplicity of explanation.
FIG. 1 is a somewhat simplified perspective view, showing an embodiment of the present invention;
FIG. 2 is a vertical sectional view of the grip handle portion ofthe embodiment in FIG. 1;
FIG. 3 is a somewhat simplified perspective view, showing another embodiment of the present invention;
FIG. 4 is a fragmentary vertical sectional view, in an enlarged scale, taken along the line 4-4 in FIG. 3;
FIG. 5 is a view similar to that in FIG. 4, showing still another embodiment of the invention; and
FIGS. 6 and 7 are a perspective view and a simplified plan view, respectively, for the explanation of the manufacturing process to clarify the structure of a still another embodiment of the bag of the present invention.
As will be noted in FIGS. 1 and 2, reference numeral 1 represents a bag which is formed with a tube of a synthetic resin such as polyethylene and polypropylene by thermally bonding each of the open ends as at 11 and then folding each of the opposing end portions of the tube material for an appropriate distance to thereby form opposing two folded end portions 12. Apart from this bag, two pieces of plates made of a synthetic resin each having an appropriate thickness greater than that of the bag body 1 and an appropriate shape and an appropriate grip hole 21 are prepared to provide grip handle members 2. Each of these handlemembers is attached as at 22, by relying on the then'nal bonding technique, to the outer surface of each of the aforesaid folded end portions of the bag body 1. In addition to this, these grip handles 2 are subjected to auxiliary welding at appropriate sites (in the embodiment illustrated, this auxiliary welding is provided at two sites as at 23 below the grip hole 21 for the convenience of explanation) by relying on the spot welding technique or like means, whereby completing the bag of the present invention. It is only necessary to fill this bag with desired contents by introducing them therein from the bottom open end of the bag and then to seal this open end by relying on the thermal bonding technique.
FIGS. 3 and 4 show another embodiment of the present invention. In these drawings, reference numeral 1 represents a bag body '1 made with a tube of a synthetic resin such as polyethylene and polypropylene. One of the open ends of the tube is closed by thermal bonding asat 11 and then this end portion is folded inwardly along the opposing end edges of the sheets of the tube to form opposing two folded portions 12. Then, by cutting the bilateral edge portions of the folded portions in an appropriate fashion, there are produced grip handle sections 13 as will be understood from FIGS. 3 and 4. A piece of plate 3 made of a synthetic resin and having an appropriate thickness greater than that of the bag body 1 is inserted between the two sheets of tube material which constitute one of the folded portions 2 and another piece of plate is inserted in the same way in the other of the two folded portions. Thereafter, the peripheral edges of each of the grip handle sections are subjected to thermal bonding as at 16, and then a grip hole 17 is formed through each of these two handle sections. Subsequently, thermal bonding 18 is provided between the respective sheets and plates 3 around said grip holes 17 to seal the bag. After this, desired contents are introduced into the tube from the open end of the bag, and then this open end is closed by thermal bonding as at 19.
FIG. 5 is still another embodiment of the invention, wherein the piece of plate is thermally bonded to the inside of the respective folded portions 12. This embodiment provides the same functional effect and advantage as those obtained from the preceding embodiments FIGS. 6 and 7 are somewhat simplified representations for explaining the structure of still another embodiment of the invention. In this embodiment, a film 101 which is made of a synthetic resinous material or laminated synthetic resinous sheets (hereinafter to be referred to simply as laminated sheet) is folded longitudinally along one side edge so as to form opposing two folded portions in U-shaped as shown in FIG. 6. A tape 102 having a thickness greater than the film but having the same quality as that of the film material and also having a breadth slightly smaller than the width b of the fold is inserted in each of the fold. Each of this inserted tapes is then thermally bonded as at to the tube material of each folded section for a distance corresponding to the desired breadth indicated at a of the bag. Then the resulting tube is cut at the line a from the remaining portion of the tube. The portion b of the tube material containing the tape will provide the aforesaid U-shaped when the tube is cut in the aforesaid manner. Thus, a bag configuration as shown in FIG. 7 is formed. Thereafter, the edges of the handle section 103 located in the upper portion of the bag body are thermally bonded together in the manner as shown in FIG. 7 to provide the grip handles. The resulting bag body is then subjected to the same subsequent fabricating procedure as that discussed in the preceding embodiment of FIG. 5. Thereafter, desired contents are packed into this bag from the open end thereof, and then this open end is closed by thermal sealing technique as at 19.
It should be understood by those skilled in the art that the thermal bonding which is used in each of the foregoing embodiments may be replaced by bonding effected by the use of an adhesive.
The bag of the present invention which is provided with a pair of handle sections has been described. In each of the embodiments, the bag may be cut open at a site between the opposing two folds 12 or 102. By doing so, it is possible to dispense or withdraw the contents from the bag without damaging the handle sections and severing them from the bag body. By cutting said site of the bag, the incised portion of the bag is not viewed or easily recognized externally of the bag and thus a good appearance of the bag is retained. Therefore, after the contents have been completely withdrawn from the bag, the resulting empty bag may be utilized for putting things in during shopping or for similar purposes. It is to be noted also that this bag is of a simplified structure which is suitable for mass production, and accordingly, the bag of the present invention can be provided at a low cost. Besides, the material of the bag coupled with sealing will permit the contents to be perfectly shielded from external moisture, and as a result, this bag will provide a perfect moistureproof package.
1. A bag made of a tube of synthetic resin, and comprising one closed end, said one end being folded of the opposing sheets of the tube to form opposing two folded end portions which are provided with a thermal bonding of broad width along the whole portion of foremost ends thereof; a pair of grip handle members made of synthetic resin thicker than that of the bag, each having a hole for insertion of fingers and being of a width almost equal to that of the bag, said grip handle members being securely attached by thermal bonding of broad width to almost the whole width of said opposing two folded end portions; and an open end from which desired contents are packed into the bag and which is closed by thermal bonding of broad width.
2. A bag according to claim 1, in which said grip handle members are securely attached along the whole root portion almost equal to the diameter of the bag opening to the opposing two folded end portions, respectively, on the outer sides thereof, and said handle members are subjected to auxiliary welding at appropriate sites by relying on the spot welding technique.
3. A bag according to claim 1, in which said grip handle members are securely attached along the whole one sides thereof except the grip holes to the opposing twofolded end portions, respectively, on the inner sides thereof, and thermal bonding is provided between said folded end portions and said handle members around said grip holes.
4. A bag according to claim 1, in which said grip handle members are securely attached to the opposing two folded end portions, respectively, the whole portion of each of said handle members being sandwiched between the opposing two sheets of the tube constituting one fold; the peripheral edges of each of the grip handle sections being produced by cutting the bilateral edge portions of said folded end portions which are subjected to thermal bonding; and thermal bonding is provided between the respective sheets of said folded end portions and said handle members around grip holes formed through each of said handle sections.