|Publication number||US3072986 A|
|Publication date||Jan 15, 1963|
|Filing date||Feb 6, 1959|
|Priority date||Feb 27, 1958|
|Publication number||US 3072986 A, US 3072986A, US-A-3072986, US3072986 A, US3072986A|
|Original Assignee||Otto Lefnaer|
|Export Citation||BiBTeX, EndNote, RefMan|
|Patent Citations (13), Referenced by (69), Classifications (14)|
|External Links: USPTO, USPTO Assignment, Espacenet|
Jan. 15, 1963 o. LEFNAER 3,072,986
BAG LOCK AND PACKING MEANS Filed Feb. 6, 1959 za g mun-m-mu-muu FIG. 2a
' OTTO LEFNAER A TTORN E Y5.
Unite States Patent Ofifice Patented Jan. 15, 1963 3,072,936 BAG LOCK AND PACKING MEANS Otto Lefnaer, 4 RoberbBose =Strasse, Stuttgart, Germany Filed Feb. 6, 1959, Ser. No. 792,62 Claims priority, application Germany Feb. 27, 1958 5 Claims. (Cl. 24-46) The present invention relates to closure devices, fasten ers, and the like, particularly for containers, such as bags, sacks, cartons, or the like.
The known means for closing small sacks or bags at their neck consisting of plastic clips or soft metal clasps have the disadvantages that their dimensions cannot be properly matched to the thic'ness of the neck of the respective bag, and that, in addition, their closing or locking force is limited. These disadvantages make them particularly unsuitable for large bags, such as mail bags, jute bags, bags made of reinforced paper, and the like. Also, these devices do not permit the bags and the like to be carried by the bag locking means.
It is an object of the present invention to provide a new type of closing and locking device for any kind of sack or bag, from the smallest cellophane candy bag up to the largest jute bag, as well as for securely tying any type and size of package, carton, and the like without knotting.
A further object of the present invention is to provide locking means that may be closed by a very simple manual operation, and that may be opened again without destroying the locking means and may thus be used many times.
The bag locks and packing means according to the present invention have the additional advantage that they may be hot sealed and permanently closed to prevent any opening of the respective package other than by destroying the lock.
The packing and locking means according to the present invention consist of a cord, preferably made of plastic material, along the length of which a plurality of projecting knobs are placed at equal distances from each other. According to the invention, these knobs have a rounded or conical profile in one direction, to enable them to slide through a hole or eye, while in the opposite direction the knobs have a substantially fiat surface which is essentially perpendicular to the longitudinal direction of the cord.
The end of the packing means or cord facing toward the flattened, vertical surfaces of the knobs has afiat head or strap with one, two, or more perforations or apertures, the simplest form being a hole or eye of a substantially circular shape having a diameter preferably slightly larger than the diameter of the knobs on the cord, so that, with the conical or rounded ends of the knobs pointing forward, the said knobs may be easily pulled through the eye. Contiguous to this first aperture in the strap are other smaller apertures which may be either circular or of oblong shape. These smaller apertures are connected to the larger aperture by a restricted gap in the strap. These holes on one or both sides of the large hole or eye are of such a diameter that the stem portion of the knobby cor-d between adjacent knobs may rest therein. The gap between a small hole and the larger hole may offer a certain resistance to the stems of the cord during the locking process, which serves to keep the stems of the cord from sliding back into the main hole or eye.
When using these packing means as a bag lock, the cord is placed around the gathered neck of the bag, then the pointed end of the knobby cord is pushed through the large eye of the strap and the cord is pulled tightly around the neck of the bag. Having obtained the proper degree of tightness, the respective cord stem between two knobs is pushed laterally against the constriction and into the smaller hole. The projecting knob adjacent the strap will now assist in preventing the cord from slipping back into the large center hole or eye, since the fiat surface of the knob is pressing against the fiat outer surface of the eye portion of the strap.
To provide an additional lock for the cord, its free end may be bent and inserted into the other small lateral hole in the strap past the respective restriction. For this reason, at least one of the lateral small holes adjacent to the large hole in the strap of thecord is preferably given an oblong shape, so that the large center hole will be left completely open to permit the passage of the knobby cord during the second insertion of its end. The closed loop thus formed may be used as a handle.
The free end of the cord may, however, also be inserted into a second larger hole in the strap of the cord, located longitudinally further outwardly on the strap. This second hole has also a smaller hole in the longitudinal direction of the strap and communicating with the large hole via a constricted gap. The cord will be similarly inserted as described above to rest with a stem portion inside the small hole.
The cord is used in a similar manner to tie packages. For this purpose, the cord is first placed around the package just like any other cord to form a first loop, and the cord end is pulled through a large hole in the strap. The cord is then tightened and pulled into one of the smaller holes through the constriction separating it from the large hole to rest with one of its stems inside and against the edges of the small hole. Then, again using the same procedure as with a normal cord, the knobby cord is wound transversely to the first loop around the package and its end is again inserted, preferably through the same large hole in the strap and one of its stems is again inserted, but this time into the free small hole at the other side of the large hole, with the result that the tension in the plastic cord will force the flat surfaces of the respective knobs against the flat surface of the strap, preventing the cord from sliding back and becoming loosened. The remaining free end of the knobby cord is then bent around and inserted into the second of the large holes in the strap. After pressing one stern portion laterally into one of the small holes past the constriction, a large loop will be formed which may be used to hold or carry the package. in this manner the packing cord according to the invention functions like a normal cord with several conventional knots, but only requires a fraction of the manual operations normally needed.
To open the cord for unpacking, the last-applied stem portion of the cord is first pushed out of the small hole past the constriction into the large hole, through which it will then slide easily since the rounded edges of the knobs offer little or no resistance. The same applies to the remaining locked stem portions. in this manner the cord may be loosened within a few seconds without becoming damaged and may therefore be reused for an unlimited number of times.
In the event that the plastic cord is to be looped sev eral times around a package, the cord may be provided with a strap with a larger number of large and small holes with intermediate constrictions. The individual loops of the cord may thus also be spaced from each other and secured by the same strap.
It is a further object of the present invention to provide the free end of the cord which is to be passed through the holes in the strap with a hook-like portion which has a width and thickness not exceeding the diameter of the knobs and terminates into a pointed end for easy insertion into the large hole of the strap. By means of this hooked end on one cord and one of the holes in the strap of another cord such cords may be coupled to hooked into the strap gether. This permits the use of several standard lengths of packing cords to form one long cord for use on both packages and bags.
These and other objects of this invention will become apparent from the specification and the accompanying drawings wherein:
FIGURES l and la show a plan view and a side view, respectively, of alocking cord according to the present invention, with the central part thereof broken away;
FIGURES 2 and 2:; show a plan view and a side view of the locking cord with a modified head;
:FlGU-RE 3 shows a perspective view of the locking cord according'to FlGUR-E 2 applied to a bag;
FIGURE 4- shows a perspective view of the locking cord according to FIGURE 2 applied to a carton or package; while FIGURES and 5a show plan and side views of a modiiication of a cord endwhich may be used'elther in the manner as shown in FIGURES 2 and 4 or for being of another cord to obtain a cord of a greater length as indicated by dot-dash lines in FIGURE 5a.
Referring now to the drawings, wherein like reference numerals are used in the various views to designate like parts, and to FIGURE 1 in particular, reference numeral 1 designates the projecting knobs of the cord and reference numeral 4 the stems between the adjacent knobs. In this embodiment, one side 2 of the knobs is of a hemispherical shape, while the other side 3 is fiat, merging with the adjacent stem 4 of the cord via a small beveled edgepor-tion. One knob follows the other, each separated from the other by a stern, and each cord is made of a length sufficient for tying or locking a particular bag or package. One end of the cord has a flat head or strap 5 secured thereto. Strap 5 has a larger hole 6 therein which communicates with an oblong hole 7 at one side and an opposite circular hole 8. Opposed projections 9 define a connecting gap between the large hole 6 and the contiguous smaller hole 7. Projections Iii define a similar gap between holes 6 and 8. Hole 6 is preferably made of a size so that knobs 1 on the cord can pass through freely. The smaller holes 7 and 8 at the right and left sides of the larger hole 6 are of such a size that the width of the oblong hole 7 and the diameter of thecircular hole 8 correspond to the diameter of the stems 4 of the cord. gaps formed by the constrictions 9 and Id, respectively, are of such size that a certain tension or pressure is required to compress the resilient material suificiently to pass the respective stems into the small lateral holes.
To obtain a better grip on the strap cord, an oblong handle tinuation of the strap.
FIGURE 2 shows end of the packing portion 11 is attached as a conone end portion of a locking cord with a modified strap. In this embodiment, the strap has two large holes 6' and 12. The large hole 6 of a diameter slightly greater than the knobs communicates at one side with a small circular hole 8' and on the opposite side with an oblong hole 7' and it is separated from these smaller holes by constricted gaps; The outer end of the strap has a second large hole 12 which, in turn, communicates with a circular, smaller hole 13. All of the smaller holes at the sides of the large holes are again dimensioned so as to preferably fit tightly around the respective stems of the cord, preventing the knobs from sliding through, while the constriction prevents the cord from slipping back into the large hole.
FIGURE 3 shows a locking cord with a strap as illustrated in FIGURE 2 applied to a bag. The cord is first passed through hole 6 in the strap and locked in one of the contiguous smaller holes. Its free end is then passed through a second large hole 12 and locked in hole 13. The projections intermediate the large and small holes prevent the knobs from slipping back into and through 14 serves as a hanright angles to the first loop and then passed again in the strap, whereupon it through the same large hole 6' is locked in the other small hole 8'. The free end of the cord is then bent into a loop and inserted into the hole 12 at the free end of the strap and finally locked in the small hole 13 at the outer end of the strap.
FIGURES 5 and 5a illustr-atea modification of the end of the locking cord opposite to the end carrying the strap. This end is shaped to permit two individual cords to be coupled together to form one longer cord. The stem portion 4' ahead of the first knob is laterally ofiset relative to the axis of the cord, and its front end is bent upwardly and provided with an elongated, button-shaped portion 15 so as to form a hook to permit a second cord to be connected thereto by passing this portion 15 through hole 12 of the strap of the second cord and hooking it into the small hole 13 thereof so that the lower surface of button 15 rests on the upper surface of the strap of the adjacent cord.
Packages requiring several loops because of their size require a larger number of holes in the cord strap, each large hole with its adjoining small holes then permitting one more loop to be passed around the respective package.
The great advantage of the present invention is the fact that the packing or locking cords may be used for bags or packages alike and then practically differ only by the length and the thickness of the knob-by cord itself. The knobs will take the function of many conventional knots and completely eliminate the need for any knotting of the cord. On the other hand, the bag or package may be unlocked or untied within a few seconds without causing any damage whatsoever to the locking cord.
By making the locking cords of a variety of different colors, the cords may also beautify the respective packages and have a considerable advertising value. Also, advertising matter or instructions on how to operate the cord and open the lock may be printed, sprayed or punched on the flat surface of the strap.
By manufacturing the locking cords of plastic material, such as polyethylene or polyvinyl chloride, they can be manufactured cheaply and in large quantities, and thus result in the provision of universal-packing means for a great number of purposes.
By using plastic material for the cords, the locking of thecord stems in the lateral small holes of the cord strap may be replaced, if so desired, by a hot sealing process, thus providingv a permanent seal which cannot be opened without destroying the cord.
While the invention has been described with reference to specific embodiments, it is understood that various modifications may be made within the spirit of the invention. Therefore, the invention should not be limited ex cept as required by the appended claims.
1. A flexible locking cord comprising a plurality of stems of essentially equal thickness, a plurality of knobcord, each flat side surface extending substantially perpendicular to the outer surface of the adjacent stem, the other ture, said connecting passage havmg a minimum width smaller than the diameter of each of said stems, said eyelet member consisting of a material permitting it to yiel resiliently when under pressure so that, with one end of said locking cord extending through said large aperture of said eyelet member, one of said stems may be passed from said large aperture between said projections into said smaller aperture by resiliently deforming said projections, thus retaining said one stem with the flat side surface of an adjacent knob-like portion abutting against said substantially fiat surface portion of said eyelet member.
2. A flexible locking cord comprising over at least a portion of its length a plurality of stems of essentially equal thickness, plurality of knob-li e portions of substantially equal diameter connecting adjacent stems, and an eyelet member secured to one end of said locking cord and provided with at least one large aperture therein with a size at least equal to the diameter of each of said knob-like portions and with at least one smaller aperture contiguous to said large aperture of a Width substantially equal to the diameter of each of said stems, each of said knob-like portions having a substantially flat side surface facing said one end of said locking cord, each flat side surface extending substantially perpendicular to the outer surface of the adjacent stem, the other side of each of said knob-like portions being contoured so as to permit an easy passage of said knob-like portions through said large aperture of said eyelet member when said locking cord is tightened, said eyelet member including passage means interconnecting said large aperture and said contiguous smaller aperture, said eyelet member having a substantially flat surface portion at least partially surrounding said smaller aperture at least one of a group consisting of said stems and said eyelet member consisting of a material permitting it to yield resiliently when under pressure, so that said cord may be applied around an object to be secured and with said one end of said locking cord extending through said large aperture of said eyelet member, one of said stems may be passed from said large aperture into said smaller aperture and retained with the fiat side surface of an adjacent knob-like portion abutting against said substantially flat surface portion of said eyelet member.
3. A locking cord as defined in claim 1, further comprising a hooklike member having an angularly bent stem portion connected to the other end of said cord, said hooklike member being adapted to be secured in an eyelet member of a similar locking cord to thereby produce a composite locking cord of greater length.
4. A flexible locking cord comprising over at least a portion of its length a plurality of stems of essentially equal thickness, a plurality of knoblike portions of larger diameter than said stems connecting adjacent stems, and an eyelet member secured to one end of said locking cord and provided with at least one large aperture therein of a size approximately equal to the diameter of each of said knoblike portions and with at least one smaller aperture contiguous to said large aperture of a Width substantially equal to the diameter of at least some of said stems, said eyelet member including a pair of spaced, opposed projections defining a connecting passage between a large aperture and a contiguous smaller aperture, said connecting passage having a minimum width smaller than the diameter of each of said stems, at least one of a group of parts consisting of said stems and said eyelet member consisting of a material resiliently yieldable under pressure so that with one end of said locking cord extending through a large aperture of said eyelet memher, one of said stems may be passed from said large aperture between said projections into said smaller aperture by resiliently deforming a part consisting of resilient material, said eyelet member being provided an additional large aperture and with a contiguous smaller aperture, said eyelet member having additional projections defining a gap between said last-mentioned apertures, and another of said stems being secured in said last-mentioned smaller aperture to thereby form a closed loop adapted for use as a handle.
5. A locking and securing device for bags, cartons and the like comprising a flexible locking cord having a plurality of stems each separated from an adjacent stem by knoblike portions of greater diameter than said stems, an eyelet member secured adjacent one end of said locking cord, said eyelet member being provided with two spaced large apertures and with a small aperture contiguous to each large aperture, opposed constrictions on said eyelet member defining connecting gaps between each large aperture and its contiguous small aperture, one of said stems being secured in one of said small apertures after being passed around an object to be secured, and another stem of said cord adapted to be secured in the other small aperture whereby a free loop of cord adapted for use as a handle is formed.
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|U.S. Classification||24/16.0PB, 402/61, 24/30.50R, 24/30.50P, 402/68, 292/307.00R|
|International Classification||B65D63/00, B65D63/10, B65D63/18|
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|European Classification||B65D63/18, B65D63/10B3|