US 3353741 A
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Nov. 21,1967 5. KAMINS ETA'L v 1 HANDLE FOR SYNTHETIC RESINOUS BAG S Filed Aug. 9, 1965 United States Patent O 3,353,741 HANDLE FORSYNTHETIC RESINOUS BAGS Seymour Kamius, Oceanside, and Norman Rosenberg, Bayside, N.Y., assignors to C-Thru Products Inc., Brooklyn, N.Y., a corporation of New York Filed Aug. 9, 1965, Ser. No. 478,213 1 Claim. (Cl. 22954) Ansr R a c'r ()1 THE DISCLOSURE A handle for synthetic resinous bags comprising a pan of interconnectible, handles, each of which is provided with downwardly extending leg portions at the ends thereof which are heat sealed, using a bar seal to the inner surface of the synthetic resinous bags, the legs having a principal axis parallel to. the line of'forceiexerted bythe load carried within the bag. a a
This invention relates generally to the field of synthetic resinous carrying bags of the type disclosed in Patent No. 3,140,038 granted to Leon Laguerre July 7, 1964, and more particularly to an improved handle particularly adapting the same for supporting relatively heavy loads within an associated bag.
In bags of the above-mentioned type, the body of the bag is normally fashioned from synthetic resinous sheet material in such manner as to provide a pair of sides which are heat-sealed along the edges thereof. The upper edges define the mouth of the bag, and a synthetic resinous handle element comprising two parts is heat-sealed within the opening to provide means for opening and closing the bag as well as carrying the same.
While bags of this type have many uses, normally they are not adapted for use in supporting relatively heavy loads owing to the fact that the bar seal along the edge of the synthetic resinous walls comprising the bag will rip under such conditions. It is to be understood that it is not the actual seal which fractures, but the material immediately adjacent to the seal which forms the wall of the bag. Material such as very thin polyethylene, or rubber hydrochloride, has relatively low tensile strength, and will stretch prior to rupture where the absence of the seal does not prevent the stretching incident to rupture.
The tendency to stretch and subsequently rupture in the above-described manner is increased by the fact that the usual handle interconnection, as disclosed in the abovementioned Laguerre patent, is along a line perpendicular to the force of gravity exerted by the load contained within the bag. We have found that where the line of interconnection between the handle and the bag is parallel to the line of action of the force caused by the supported load, the tendency of the bag to tear can in all cases be reduced and in most cases substantially eliminated.
It is therefore among the principal objects of the present invention to provide an improved handle construction for use with a synthetic resinous-type bag in which the handle element is secured to the bag in such manner that relatively heavy loads can be safely carried.
Another object of the invention lies in the provision of an improved handle construction of the class described for use with synthetic resinous bags, possessed of the above advantage, in which the cost of fabrication may be directly comparable with existing prior art handles, whereby the same may enjoy consequent wide sale, distribution and use.
Yet another object of the invention lies in the provision of an improved handle construction for use with synthetic resinous bags which may be employed in the manufacture of such bags, using existing techniques and machinery, with little or no modifications thereof.
Yet another object of the invention lies in the provision of an improved handle construction which may be of unusually attractive appearance.
A feature of the disclosed embodiment lies in the fact that the basic construction may be used in conjunction with handle-gripping portions having a wide variety of shapes and designs.
These objects and features, as well as other incidental ends and advantages, will more fully appear in the progress of the following disclosure, and be pointed out in the appended claim.
In the drawing, to which reference will be made in the specification, similar reference characters have been employed to designate corresponding parts throughout the several views.
' FIGURE 1 is a fragmentary view in' perspective of an embodiment of the invention.
- FIGURE 2 is a similar fragmentary view in perspective, showing certain of the component parts in altered relative condition.
FIGURE 3 is a view in perspective showing the embodiment in fully loaded condition, and with the carrying handle and elements thereof in interconnected condition.
FIGURE 4 is a fragmentary enlarged sectional view as seen from the plane 4-4 in FIGURE 1.
FIGURE 5 is an enlarged fragmentary sectional view as seen from the plane 55 in FIGURE 1.
FIGURE 6 is an enlarged fragmentary vertical sectional view as seen from the plane 6-6 in FIGURE 1.
FIGURE 7 is a fragmentary enlarged sectional view as seen from the plane 77 in FIGURE 1.
In accordance with the invention, the device, generally indicated by reference character 10, comprises broadly: a bag element 11 and a handle element 12.
The bag element 11 may be of a conventional expandable type 14, including first and second sidewalls 14 and 15, first and second foldable end walls or gussets 16 and 17, respectively, and a bottom wall 18. A continuous upper edge 19 defines the open mouth of the bag in which the handle element 12 is secured, and forms the meeting of the inner surface 20 and outer surface 21 of the bag element 11.
The handle element 12 is preferably injection-molded of synthetic resinous material which is compatible for heat-sealing purposes with the material used to form the bag element 11. It includes first and second handle members 23 and 24, respectively, each having corresponding selective mutual interconnecting means 25 (see FIGURES 4 and 5), as is well-known in the art, The base member 26 of each of the members 23-24 is bounded by a lower edge 27 and an upper edge 28, as well as side edges 29 and 30 which bound a planar surface 31 against which an upper portion of the bag element 11 is sealed.
Extending downwardly from each end of the base member 26 are first and second leg portions 32 and 33. A surface 37 is continuous with the surface 31, whereby the leg portions 32-33 and the base member 26 may form a continuous bar sealing area 38 against which the inner surface 20 of each sidewall 14-15 may be pressed during scaling to form the interconnection between the bag element 11 and the handle element 12.
In fully opened and loaded conditions, as seen in FIG- URE 3 in the drawing, the weight exerted against the inner surface of the bottom wall 18 is transmitted up the first and second sidewalls 14-15 to the interconnected handle element 12. As has already been experienced in the art, the tearing of the bag has normally occurred immediately below the lower edge of the base member 26 along a vertical line. In the present construction, a very large amount of the strain is transferred to those portions of the bag which are interconnected to the leg portions 32-33. Here, however, the strain which is in a vertical direction is resisted by the relatively long vertical portions of the sealed area 38, and while the same stresses are present, varying with the weight of the load, the strain which results from the same is reduced to a point where it is practically negligible. Since the base member 26 is disposed between the leg portions 32 and 33, the stresses which would normally stretch the interconnection between the bag and the base member are also alleviated to the point Where little if any stretching occurs.
We wish it to be understood that we do not consider the invention limited to the precise details of structure shown andset forth in this specification, for obvious modifications will occur to those skilled in the art to which the invention pertains.
In a bag of thin flexible synthetic resinous sheet material having a mouth defined by two opposed walls, and a pair of synthetic resinous handle members each interconnected to one of said walls, said handle members having means for mutual interconnection, the improvement comprising: said handle elements each having a base member, said base member being interconnected substantially at an upper edge portion of a respective wall and confined to a relatively central portion thereof, said base portion having. first and second ends; a leg portion extending downwardly from each of said first and second ends a distance sufiicient to resist vertical strain on said bag and disposed in coplanar integral relation with respect to said base portion; said leg portions and base portion being interconnected to a planar surface of a corresponding wall as a result of heat-sealing, the interconnection of each of said leg portions being in the form of an elongated bar seal the axis of which is parallel to the axis of said leg portion; said base member being interconnected to a respective wall by a bar seal the axis of which'is perpendicular to the axis of the bar seals between said leg portions and said respective walls.
References Cited UNITED STATES PATENTS 1,733,219 10/1929 Duvall 229-52 2,458,173 1/1949 Kardon 229-54 2,722,367 11/1955 Verlin 229-54 2,846,134 8/1958 Moubayed 229-54 3,128,035 4/1964 Teweles 229-54 3,140,038 7/1964 Laguerre 229-54 3,227,358 1/ 1966 Laguerre 229-54 FOREIGN PATENTS 592,713 2/ 1960 Canada.
JOSEPH R. LECLAIR, Primary Examiner.
DAVIS T. MOORHEAD, Assistant Examiner.