BACKGROUND OF THE DISCLOSURE
1. Field of the Disclosure
The present disclosure relates to end stops for a reclosable slider zipper. The end stops are formed by a strap configuration.
2. Description of the Prior Art
In the prior art, it is well-established that a slider zipper for a reclosable package or bag requires end stops at the ends of the zipper to prevent the slider from being withdrawn or pulled from the ends of the zipper. This is typically done by providing an enlargement on the ends of the zipper in order to prevent movement of the slider past these enlargements. While this structure is well-adapted and suitable for its intended purposes, further improvements are sought, particularly with respect to simplifying of manufacturing steps, reducing costs of manufacture, and increasing of manufacturing speed.
OBJECTS AND SUMMARY OF THE DISCLOSURE
It is therefore an object of the present disclosure to simplify the manufacturing of slider zippers, as well as reduce the costs of manufacture and increasing the manufacturing speed thereof, while maintaining the required resistance to removal of the slider from the zipper.
These and other objects are attained by providing end stops in the form of straps which are inserted or secured into openings and looped near the ends of the slider zipper.
BRIEF DESCRIPTION OF THE DRAWINGS
Further objects and advantages of the disclosure will become apparent from the following description and from the accompanying drawings, wherein:
FIG. 1 is a perspective view of a first embodiment of the disclosure.
FIG. 2 is a perspective view of a second embodiment of the disclosure.
FIG. 3 is a perspective view of a third embodiment of the disclosure.
FIG. 4 is a perspective view of a fourth embodiment of the disclosure.
FIG. 5 is a perspective view of a fifth embodiment of the disclosure.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
Referring now to the drawings in detail wherein like numerals indicate like elements throughout the several views, one sees that FIG. 1 is a perspective view of the zipper 10 which is typically made from polymeric material and includes first and second profiles 12, 14 which are co-extensive with each other. Zipper 10 is intended for use in reclosable packages, pouches, bags or similar applications. Those skilled in the art, after review of the present disclosure, would realize that there is a broad range of prior art profile designs which could be incorporated into embodiments of the present disclosure. In the embodiment illustrated in FIG. 1, first profile 12 includes first interlocking element 16 and first flange 18. Second profile 14 includes second interlocking element 20 and second flange 22. As is known, first and second flanges 18, 22 are used for sealing, joining or otherwise connecting to bag walls of a reclosable package (not shown). Slider 23 is mounted on the first and second interlocking elements 16, 20 and operates to separate the interlocking elements if moved in an opening direction and operates to join or close the interlocking elements if moved in a closing direction, opposite to the opening direction. End seals may be formed at the ends 26, 26′ of zipper 10 by sealing together the respective ends of first and second profiles 12, 14 to each other. Alternately, the end seals could be omitted and the zipper 10 held together by straps 30, 30′ with the respective ends of the first and second profiles 12, 14 aligned and positioned side-by-side as shown in the various figures. Apertures or slits 24, 24′ are formed through first and second flanges 18, 22 near, or inwardly adjacent from, the ends 26, 26′ of the zipper 10. A substantially identical end stop and aperture or slit with substantially identical associated structure is found at each end 26, 26′ of zipper 10. Continuous lengths of polymeric, polyolefin or similar heat-sealable material are passed through apertures 24, 24′, looped above the first and second interlocking elements 16, 20 of zipper 10 and cut thereby forming straps 30, 30′. The ends are sealed in fin seals 32, 32′. The fin seals 32, 32′ may be made using heat, ultrasonics, adhesive, or any similar method. The apertures or slits 24, 24′ may be made with a blade or possibly by a pointed end of the material forming straps 30, 30′. The resulting structure provides end stops to prevent the slider 23 from being pulled from ends 26, 26′.
FIG. 2 illustrates a similar embodiment except that lap seals 33, 33′ are substituted for fin seals 32, 32′ on the straps 30, 30′.
FIG. 3 illustrates a similar embodiment except that melted rivets 34, 34′ are substituted for the fin seals 32, 32′ or lap seals 33, 33′, with a fin-type end configuration resulting in the straps 30, 30′. Alternately, a lap-type end configuration could be used.
FIG. 4 illustrates a similar embodiment except that snap fit rivets 35, 35′ are substituted for the fin seals 32, 32′, lap seals 33, 33′ or melted rivets 34, 34′, with a fin-type end configuration resulting in the straps 30, 30′. In both FIGS. 3 and 4, the rivets 34, 34′ or 35, 35′ can be a separate piece or integral with the straps 30, 30′. Alternately, a lap-type end configuration could be used.
Additionally, the apertures 24 can be eliminated by fusing portions of the straps 30, 30′ to the respective first and second flanges 18, 22. That is, for any of FIGS. 1-4, the straps 30, 30′ would each be replaced by first strap segment extending from a respective end of the first flange 18 and a second strap segment extending from a respective end the second flange 22. The respective first and second strap segments would then be joined to each other in manners shown in FIGS. 1-4. These alternative configurations would typically require end seals between the first and second profiles 12, 14 at ends 26, 26′ of the zipper.
Further, as shown in FIG. 5, straps 30, 30′ could be integral with both the first and second flanges 18, 22, looping over the interlocking element 16, 20, thereby eliminating the need for further attachment of the straps. This alternative configuration would typically require end seals between the first and second profiles 12, 14 at ends 26, 26′ of the zipper.
Thus the several aforementioned objects and advantages are most effectively attained. Although preferred embodiments of the invention have been disclosed and described in detail herein, it should be understood that this invention is in no sense limited thereby and its scope is to be determined by that of the appended claims.
Patent Grant
9009930
