Patent Application
20100071170
The invention relates generally to the field of fastening assemblies. More specifically, the invention relates to fastening assemblies that are fabricated from, or include, a sustainable material.
Currently, fastening assemblies, e.g., fasteners, staples, and cable ties, which are used to attach tags to articles of commerce, also known as merchandise, and/or to bind items together, are made from conventional polymers that are derived from fossil fuels, e.g., petroleum. Examples of these conventional polymers include the following: polyurethanes (“PUs”), polyethylenes (“PEs”), polypropylenes (“PPs”), and polyamides (“PAs”). These conventional polymers are not sustainable, meaning that the raw material from which conventional polymers are derived, i.e., fossil fuels, are not renewable, and thus, will not be available indefinitely. Also, the use of fossil fuels derived polymers has become disadvantageous because the price of fossil fuels has increased steadily due to the increase in the worldwide demand for fossil fuels and political instabilities in several countries that export fossil fuels. Furthermore, conventional polymers do not biodegrade/compost as defined by existing American Society for Testing and Materials (“ASTM”) standards and/or European (“EN”) standards, and thus, constitute an environmental threat.
It should, therefore, be appreciated that there is a need for fastening assemblies that are made of materials that are not derived exclusively from fossil fuels. The present invention satisfies this need.
The present invention includes exemplary embodiments of a fastening assembly including an item that is made of, or includes, a sustainable material, and a related method of manufacturing such a fastening assembly. In other, more detailed features of the invention, the sustainable material is a material derived from a renewable resource, or a material made of a blend of a first material that is derived from a renewable resource and a second material that is derived from a fossil fuel. Also, the sustainable material can include a degradable material, a biodegradable material, a compostable material, a PE, a PP, a PU, a PA, a polyester, a bioplastic, a bioplastic blend, a polylactic acid (“PLA”), a polyvinyl alcohol (“PVOH”), a polyhydroxyalkanoate (“PHA”), a polyhydroxybutyrarte (“PHB”), a polycaprolactone (“PCL”), a polybutylene succinate (“PBS”), a polybutylene succinate adipate (“PBS-A”), an aliphatic-aromatic copolyester (“AAC”), and a modified polyethylene tetraphthalate (“PET”). In addition, the sustainable material can be derived from a plant. Furthermore, the sustainable material can be derived from corn starch, sugarcane, tapioca, wheat, soybean oil, hemp oil, potato, wood fiber, hemp, flax, sisal, or jute.
In other, more detailed features of the invention, the fastening assembly is a fastener, a staple, or a cable tie. Also, when the fastening assembly is a fastener, the item can be a paddle, a crossbar, or a filament. In addition, when the fastening assembly is a staple, the item can be a crossbar or a filament. Furthermore, if the fastening assembly is a cable tie, the item can be a strap, a head, a neck, a tang, a rail, or a tooth.
Another exemplary embodiment is a fastening assembly that includes an item having at least one portion. The at least one portion includes a sustainable material.
An exemplary method according to the invention is a method for manufacturing a fastening assembly having at least one portion. The method includes providing a sustainable material, and forming the at least one portion of the fastening assembly from the sustainable material.
Other features of the invention should become apparent to those skilled in the art from the following description of the preferred embodiments taken in conjunction with the accompanying drawings, which illustrate, by way of example, the principles of the invention, the invention not being limited to any particular preferred embodiment(s) disclosed.
These and other features, aspects, and advantages of the present invention will become better understood with reference to the following description, appended claims, and accompanying drawings, where:
Unless otherwise indicated, the illustrations in the above figures are not necessarily drawn to scale.
The present invention is embodied in fastening assemblies, and related methods for forming fastening assemblies, that are made of, or include, sustainable material, e.g., polymers derived from sustainable materials, also known as “sustainable polymers”. These sustainable polymers also can be biodegradable/compostable. Fastening assemblies come in a multitude of different mechanical configurations. A few non-limiting examples of fastening assemblies are discussed below.
A first example of a fastening assembly is a plastic fastener of the type used to attach a merchandise tag to a piece of fabric, such as an article of clothing, product label, and the like. This type of fastener typically includes items, for example, an elongated plastic member having a first end shaped to define a crossbar, also known as a “T-bar,” a second end shaped to define an enlarged paddle, and a thin filament portion that interconnects the crossbar and the paddle. As will be described further below, the crossbar is adapted to be inserted first through the tag and then into the piece of fabric, with the paddle being appropriately sized and shaped to keep the tag from being pulled off the second end of the filament portion.
Referring now to
Referring additionally to the enlarged perspective view shown in
Typically, plastic fasteners 10 of the type described above are mass-produced in either one of two different forms known as fastener stock 32 (see
A second type of fastener stock, which is shown in U.S. Pat. No. 4,955,475 to McCarthy et al. (“the McCarthy patent”), which is incorporated by reference herein in its entirety, includes a plurality of fasteners 10 arranged in an end-to-end alignment, where the paddles 22 and T-bars 18 of successive fasteners are joined together using severable connectors so as to form a supply of continuously connected fastener stock. This second type of fastener stock is commonly manufactured through a process that is referred to as “continuous molding”. An example of continuously connected fastener stock that is manufactured using a process of continuous molding is disclosed in U.S. Pat. No. 4,462,784 to Russell (“the Russell patent”), which is incorporated by reference herein in its entirety. In the Russell patent, the continuously connected fastener stock is made using a rotary extrusion process that involves a rotating molding wheel whose periphery is provided with molding cavities that are complementary in shape to the molded fastener stock. To form the fastener stock, molten plastic is extruded into the cavities of the molding wheel with a layer of controlled film overlying the peripheral impression. The molten plastic is then allowed to solidify. A knife that is in substantially elliptical contact with the peripheral impression is then used to skive excess plastic from the rotating molding wheel, i.e., the layer of controlled film, leaving plastic only in the molding cavities. After the skiving process, the continuously connected fastener stock is removed, in-line, from the cavities in the molding wheel. Transfer rolls advance the fastener stock typically to a stretching station where selected portions of the fastener stock are selectively distended, e.g., using diverging sprocket wheels. After the stretching process, the fastener stock is collected onto a windup roll for packaging.
Typically, the practice of at least partially separating an individual plastic fastener 10 from a supply of fastener stock 32 and, in turn, inserting the individual plastic fastener through a tag 12 and into an article of commerce 14 is achieved using a hand-held apparatus commonly referred to as a tagger gun. Examples of tagger guns are disclosed in the McCarthy patent and the Russell patent.
The practice of using a tagger gun to secure a tag 12 to an article of commerce 14 is typically accomplished in the following procedure. The supply of fastener stock 32 is loaded into the tagger gun. The tagger gun includes a needle having a sharpened tip, which is inserted through the tag and into the article of commerce. An ejector rod in the tagger gun is then activated, for example, through the compression of a trigger, which, in turn, ejects the crossbar 18 first through the tag and then the article of commerce, thereby disposing the crossbar and the paddle 22 on opposite sides of the article of commerce with the tag slidably disposed onto the filament 24 of the fastener 10. As noted above, the paddle is appropriately sized and shaped to keep the tag from being pulled off the filament portion of the fastener.
A plastic staple is a second example of a fastening assembly, which is dispensed from continuously connected stock that is formed from the following items: two elongated and continuous side members coupled together by a plurality of equidistantly-spaced cross-links. The common name for this type of continuously connected stock is “ladder stock,” and examples of which are described in U.S. Pat. No. 4,039,078 to Bone, which is incorporated by reference herein in its entirety. The individual staples have an H-shape and are dispensed from the fastener stock by cutting the side members at appropriate points between cross-links. The continuously connected stock that includes the staples can be made using the previously discussed continuous molding process, and can be dispensed using a tagger gun.
Referring now to
Referring additionally to
A cable tie, also known as a bundling tie and a harnessing device, is a third type of fastening assembly that typically is used to couple together a plurality of elongated objects, such as wires or cables. One type of exemplary cable tie includes the following items: an elongated strap having an apertured head at one end. Typically, the opposite end of the elongated strap is shaped to define another item, a tail of narrowed width that is adapted for insertion through the apertured head to form a closed loop. A plurality of serrations or teeth is formed along the length of the elongated strap, and an internal pawl (or locking tang) is located within the apertured head. The internal pawl is adapted to prevent a serration on the strap, once inserted past the internal pawl, from being withdrawn. In this manner, the engagement of the internal pawl with the serrated strap is used to lock the cable tie in a closed-loop configuration. Examples of cable ties of the above construction are disclosed in the following U.S. patents, all of which are incorporated by reference herein in their entireties: U.S. Pat. Nos. 4,658,478 and 4,754,529 to Paradis, U.S. Pat. No. 5,593,630 to Sorensen et al., and U.S. Pat. No. 5,669,111 to Rohaly.
Another type of exemplary cable tie differs from the above-described cable tie in that it includes an apertured or ladder-type strap, instead of a serrated strap. The head of the cable tie typically has a buckle-like shape and includes a tongue that is adapted to enter the apertures of the strap and to lock the strap in a fixed loop configuration. Examples of this type of cable tie are disclosed in the following U.S. patents, all of which are incorporated by reference herein in their entireties: U.S. Pat. No. 3,766,608 to Fay, U.S. Pat. No. 4,347,648 to Dekkers, and U.S. Pat. No. 4,866,816 to Caveney.
Cable ties, whether of the serrated-strap variety or of the ladder-strap variety, both described above, typically are formed by injection molding. More specifically, this typically involves the use of a two-piece mold into which the impression of one or more whole cable ties has been formed. Molten plastic is injected into the mold through a single opening or gate in the mold until the one or more impressions within the mold are filled. The molten plastic is then allowed to harden in the one or more impressions, and then, the cable ties are removed from the mold.
Referring now to
The strap 56, which is generally rectangular, is an elongated flexible member that is shaped to include a tail 78 of narrowed width that is configured to be inserted through the channel 74 to form a closed loop. In addition, the strap is shaped to include a top surface 80 and a bottom surface 82, with the bottom surface shaped to include a pair of spaced-apart longitudinally extending rails 84 and 86 and a plurality of teeth 88 laterally extending between the rails. The teeth are configured to lockably engage the tang 76 so as to lock the cable tie 52 in a closed loop configuration.
In the present invention, the material from which a fastening assembly, e.g., the fastener 10, staple 46, or cable tie 52, or any item or any portion of an item (where the item can include one or more portions) that is included in the fastening assembly, is made of, or includes, a sustainable material instead of a polymer(s) that is(are) exclusively derived from fossil fuels. A sustainable material is a material that is derived from a renewable resource, or a blend of a first material that is derived from a renewable resource and a second material that is derived from a fossil fuel. Examples of sustainable materials include the following: degradable materials, biodegradable materials, e.g., polylactic acid (“PLA”), polyvinyl alcohol (“PVOH”), polyhydroxyalkanoate (“PHA”), polyhydroxybutyrarte (“PUB”), polycaprolactone (“PCL”), polybutylene succinate (“PBS”), polybutylene succinate adipate (“PBS-A”), aliphatic-aromatic copolyester (“AAC”), and modified polyethylene tetraphthalate (“PET”), and bioplastics and bioplastic blends that can include, for example, PEs, PUs, PAs, polyester, and/or PPs. Additional examples of sustainable materials include compostable materials, for example, materials that comply with the ASTM 6400, EN 13432, and/or International Organization for Standardization (“ISO”) 14855 standards.
Biodegradable and/or compostable material is configured to decompose in nature as a result of the interaction of naturally occurring microorganisms with the material. During this interaction, the microorganisms metabolize and degrade the biodegradable or compostable material's molecular structure under suitable conditions, and produce inert organic materials, which are less of an environmental concern. The rate of degradation is dependent upon many factors including, for example, the temperature, the moisture, and oxygen content of the material; and the amount of sunlight to which the material is subjected.
Most bioplastics and bioplastic blends are biodegradable and formed from biological, and thus, renewable and sustainable, raw materials. These renewable and sustainable, raw materials include, for example, plant sources such as corn starch, sugarcane, tapioca, wheat, soybean oil, potato, or hemp oil; or microbial sources. Bioplastics primarily are composed of a matrix, also referred to as a resin, and a reinforcement of naturally occurring fibers, both of which typically are derived from natural plant fiber, e.g., wood fiber, hemp, flax, sisal, and/or jute.
Sustainable materials, e.g., degradable materials, biodegradable materials, bioplastics, bioplastic blends, and compostable materials, are advantageous in that they either are not derived from fossil fuels, or require a lesser amount of fossil fuels for their production than conventional fossil fuel based polymers. Thus, these materials advantageously result in the following: the conservation of fossil fuels, the reduction of greenhouse emissions and their deleterious effects on the environment, the reduction in the amounts of refuse generated.
Referring additionally to
All features disclosed in the specification, including the claims, abstract, and drawings, and all of the steps in any method or process disclosed, may be combined in any combination, except combinations where at least some of such features and/or steps are mutually exclusive. Each feature disclosed in the specification, including the claims, abstract, and drawings, can be replaced by alternative features serving the same, equivalent, or similar purpose, unless expressly stated otherwise. Thus, unless expressly stated otherwise, each feature disclosed is one example only of a generic series of equivalent or similar features.
The foregoing detailed description of the present invention is provided for purposes of illustration, and it is not intended to be exhaustive or to limit the invention to the particular embodiments disclosed. The embodiments may provide different capabilities and benefits, depending on the configuration used to implement the key features of the invention. Accordingly, the scope of the invention is defined only by the following claims.
Priority is claimed to U.S. Provisional Patent Application No. 61/015,146, filed on Dec. 19, 2007, entitled “Fastening Assembly Fabricated from a Sustainable Material and Related Method,” by Charles J. Burout and Thomas Shilale, and U.S. Provisional Patent Application No. 61/044,838, filed on Apr. 14, 2008, entitled “Fastening Assembly Fabricated from a Sustainable Material and Related Method,” by Charles J. Burout and Thomas Shilale. Both U.S. Provisional Patent Application No. 61/015,146 and U.S. Provisional Patent Application No. 61/044,838 are incorporated by reference herein in their entireties.
| Number | Date | Country | |
|---|---|---|---|
| 61015146 | Dec 2007 | US | |
| 61044838 | Apr 2008 | US |
