Endless elastic loops commonly called rubber bands are well known for bundling items together. Such rubber bands are typically provided in a package (such as a bag or box, for example) in which many rubber bands are jumbled together. Because of their elongated loop configurations, the bands often tangle with each other into a mass from which it can be difficult to separate a single band for use. When using rubber bands in an industrial setting, such as a packaging operation in which the bands are used for bundling or closing items in an industrial process, manual handling of rubber bands can take more time than desired because of the inherent difficulty described above.
In one aspect, a dispenser is configured for use with a chain of rupturably connected elastic bands, each of the bands having an aperture therethrough. The dispenser includes a fixed convex surface and a stop element. The chain of bands is configured to be drawn over the fixed convex surface in a direction from a first side of the surface to a second side of the surface. The stop element is positioned proximate the second side of the surface, and the stop element is configured for insertion into the aperture of one of the elastic bands.
In another aspect, an assembly is configured for use with a chain of rupturably connected elastic bands. The chain is provided on a spool, and each of the bands has an aperture therethrough. The assembly includes a dispenser and a shaft. The dispenser includes a fixed convex surface and a stop element. The chain of bands is configured to be drawn over the fixed convex surface in a direction from a first side of the surface to a second side of the surface. The stop element is positioned proximate the second side of the surface, and the stop element is configured for insertion into the aperture of one of the elastic bands. The shaft is configured to support the spool.
In yet another aspect, a method is described for dispensing elastic bands from a chain of rupturably connected elastic bands using a dispenser assembly. Each of the bands has an aperture therethrough, and the chain is provided on a spool. The method includes mounting the spool on a shaft of the assembly; positioning a portion of the chain over a fixed convex surface of the assembly; pulling the chain in a direction from a first side of the surface to a second side of the surface so that first and second elastic bands of the chain are pulled past the second side of the surface; and inserting a stop element into the aperture of the second elastic band, so that the first elastic band is outside the dispenser assembly.
This disclosure, in its various combinations, either in apparatus or method form, may also be characterized by the following listing of items:
1. A dispenser configured for use with a chain of rupturably connected elastic bands, each of the bands having an aperture therethrough, wherein the dispenser includes:
This summary is provided to introduce concepts in simplified form that are further described below in the Detailed Description. This summary is not intended to identify key features or essential features of the disclosed or claimed subject matter and is not intended to describe each disclosed embodiment or every implementation of the disclosed or claimed subject matter. Specifically, features disclosed herein with respect to one embodiment may be equally applicable to another. Further, this summary is not intended to be used as an aid in determining the scope of the claimed subject matter. Many other novel advantages, features, and relationships will become apparent as this description proceeds. The figures and the description that follow more particularly exemplify illustrative embodiments.
The disclosed subject matter will be further explained with reference to the attached figures, wherein like structure or system elements are referred to by like reference numerals throughout the several views. It is contemplated that all descriptions are applicable to like and analogous structures throughout the several embodiments.
While the above-identified figures set forth one or more embodiments of the disclosed subject matter, other embodiments are also contemplated, as noted in the disclosure. In all cases, this disclosure presents the disclosed subject matter by way of representation and not limitation. It should be understood that numerous other modifications and embodiments can be devised by those skilled in the art that fall within the scope of the principles of this disclosure.
The figures may not be drawn to scale. In particular, some features may be enlarged relative to other features for clarity. Moreover, where terms such as above, below, over, under, top, bottom, side, right, left, etc., are used, it is to be understood that they are used only for ease of understanding the description. It is contemplated that structures may be oriented otherwise.
A hinged dispenser is described for a strip of elastic bands, which can be provided on a spool. The dispenser includes a convex protrusion or “hump” over which the bands travel, with a stop element such as a pin or peg at an end of the protrusion. In use, the stop element holds the penultimate band so that a user can pull on the last band to detach it from the strip of bands (such as at perforations between individual bands). To reset for the next use, the user pulls up on the last connected band and slips it over the stop element to allow the next band (now the penultimate band) to fall down and loop around the stop element.
While other dispensers for spooled items are known, the current concept offers advantages in use over devices in which the spool itself constitutes a hump over which the items are carried. In contrast to a rotating roll or spool that continually changes position and size, the use of a stationary protrusion of stable dimension allows for optimization of band motion thereover.
Dispenser 10 is configured for use with a chain 30 of rupturably connected elastic or elastomeric bands 28, each of the bands 28 having an aperture 36 therethrough. Dispenser 10 includes a fixed convex protrusion 18 having a surface 80 over which the chain of bands 30 is configured to be pulled in a direction 39 (labeled in
In an exemplary embodiment of dispenser 10, a stop element 26 is positioned proximate the second side 84 of the surface 80 and is configured for insertion into the aperture 36 of one of the elastomeric bands 28. In an exemplary embodiment, adjacent bands 28 are rupturably connected to each other at their ends 32. Protrusion 18 and stop element 26 are positioned in base 12. Dispenser 10 further includes cover 14 movably attached to base 12. Cover 14 includes interior concave surface 78.
As shown in
In the illustrated embodiment, cover 14 is configured with curved end 42 that is shaped to press downwardly on elastic strip 30 to prevent unintentional disengagement of the constrained band 28b from stop element 26. However, the shape of curved end 42 is preferably smooth to prevent unintentional breaking of adjacent bands at the joints at ends 32 when strip 30 is pulled past curved end 42 in direction 39, as shown in
As shown in
As shown in
In an exemplary embodiment, elastic strip 30 is cut so that each elastic band 28 is attached to an adjacent elastic band 28 at joints 74 at adjacent ends 32. In an exemplary embodiment, an elastic band 28 is substantially configured as a loop surrounding aperture 36 and having length dimension L and width dimension W. In an exemplary embodiment, a length L of an elastic band extends between opposite ends 32. In the illustrated embodiment, joints 74 are located at end 32 of each elastic band 28 and are configured as small, at least partially uncut pieces of elastic material.
In an exemplary embodiment, each elastic band 28 is formed to have a width W that is less than its length L (wherein W and L are measured in substantially perpendicular directions). While a particular configuration is illustrated for elastic bands 28, it is contemplated that other flat band shapes are also suitable, including for example, oval, oblong, elliptical, circular, and other closed polygonal and curved shapes, whether symmetrical or asymmetrical. Aperture 36 can be shaped other than oblong. In the illustrated embodiment, elastic band 28 has a substantially consistent dimension D between outer perimeter cut 34 and aperture 36. However, it is contemplated that in other embodiments, such a dimension need not be substantially consistent.
In an exemplary embodiment, band strip 30 is sheet-like in the sense that it is formed of a web of elastomeric material that is flat in character, although it may be drapeable and floppy and thus not always displayed in flat form. In an exemplary embodiment, elastic band strip 30 has a thickness less than about 100 mils (2.54 mm) and more commonly about 10 mils (0.25 mm) to about 35 mils (0.89 mm).
While the illustrated embodiment shows two joints 74 connecting each elastic band 28 to an adjacent elastic band 28, it is contemplated that other configurations of joining mechanisms can also be used, including for example, perforations, score lines, cut lines of full or partial depth, and other mechanisms for forming a ruptureable line or contour of weakness connecting the adjacent elastic bands 28. Moreover, while a particular shape and configuration of the joint 74 between the elastic bands 28 is illustrated, it is contemplated that other forms and shapes can be used. As shown in
Upon breaking an individual elastic band 28 from elastic strip 30, elastic band 28 in an exemplary embodiment has sufficient elastic strength to permit stretching of its loop having an inner circumference defined by aperture 36 to at least three times the size of the relaxed, unstretched inner circumference without fracture of the elastic material. The relaxed, unstretched inner circumference will vary depending on the size of the opening desired for the loop. The relaxed unstretched inner circumference typically ranges from about 1.5 inches (3.8 cm) up to about 10 inches (25.4 cm) but is not limited to this typical range. In this disclosure, the term “circumference” is loosely used to refer to a perimeter of a closed shape and thus is applicable for describing an edge of an oval, elliptical or other closed polygon or shape (whether symmetrical or asymmetrical) that may or may not be circular.
A width dimension D of elastic band 28 between aperture 36 and outer perimeter cut 34 is adequate to provide requisite strength for the elastic band 28 as it is placed about a product or bundle of products, such as produce that is sold in clumps or groups, for example (not shown). As shown in
In an exemplary embodiment, materials for forming the elastic strip 30 are rubber-like in character. The material desirably recovers from a stretched condition relatively quickly; however, instantaneous retraction or recovery to an original relaxed condition and dimension after stretching is not always critical for functional elastic performance. Substantially instantaneous retraction to a loop inner circumference dimension (defined by aperture 36) no greater than 5 percent above the original unstretched loop inner circumference dimension suffices for a multitude of uses. A substantially instantaneous loop retraction is accomplished when, after having been momentarily stretched to a predetermined extent, it takes no more than 3 seconds for the loop to retract (i.e., recover) to an inner circumference size no more than 5 percent greater than the inner circumference of the original unstretched loop. A momentarily stretched condition is one in which the stretch is not held for more than 3 seconds, and the predetermined extent of the stretch is three times (or more) the inner circumference of the loop in unstretched relaxed condition. There may be occasions where retraction may take possibly up to about 10 seconds and still may constitute sufficiently quick retraction to be useful as elastic material for the purposes of this disclosure. Those skilled in the art of elastic performance features are capable of selecting materials such as elastomers possessing the elastic stretch and retraction characteristics desired for a particular use.
In selecting materials such as elastomers for elastic strip 30, substantially instantaneous retraction is most preferred for rapid bundling of products; slower retraction may allow some product to fall out of the bundle before retraction takes place. On the other hand, a modestly slower retraction may be quite adequate where elastic band 28 is to be stretched about a single product under conditions where speed of retraction (bounce back) is reliable but not the dominant consideration.
Suitable elastomers include natural and synthetic elastic materials, including rubber, vulcanized rubber, and thermoplastic elastomers. Particularly suitable elastomers are those that are thermoplastic in that they at least soften in response to heat, or even melt, to a flowable or moldable state. A multitude of thermoplastic elastomers are known and more are being created. A suitable family of thermoplastic elastomers includes styrenic block copolymers. This family includes styrene-butadiene styrene and styrene-ethylene-butylene styrene. Another family of useful thermoplastic elastomers include olefinic elastomers, including those that are ethylene based as well as those that are polypropylene based (e.g., where interposed different monomer blocks are not used but blocks of different tacticity—atactic and isotactic—are created by using metallocene catalysis polymerization). Yet another family of thermoplastic elastomers include polyvinyl chloride-based elastomers. Still other families of thermoplastic elastomers can be based on urethanes, nylon, and silicon, for example.
In use, dispenser 10 may be mounted with a spool holder such as in assembly 46 shown in
With reference to
Those skilled in the art will readily recognize that the teachings of this disclosure may be embodied in specific forms other than those illustrated without departing from the essential described characteristics. The illustrated embodiments are therefore to be considered in all respects illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than the foregoing description, and all variations that come within the meaning and range of equivalency of the claims are therefore intended to be embraced thereby.
Although the subject of this disclosure has been described with reference to several embodiments, workers skilled in the art will recognize that changes may be made in form and detail without departing from the scope of the disclosure. In addition, any feature disclosed with respect to one embodiment may be incorporated in another embodiment, and vice-versa.
This application claims the benefit of priority from U.S. Provisional Patent Application No. 62/509,323, filed May 22, 2017; this priority application is hereby incorporated by reference in its entirety.
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Number | Date | Country | |
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