The present disclosure relates to seamless clothing articles having an inner liner and methods of manufacturing the same. Particular embodiments are directed to knit gloves having a seamless inner liner.
Many gloves are made by cutting sheets of fabric into multiple pieces per a predetermined pattern and then sewing these pieces together, thereby completing a glove assembly. This production/assembly method is sometimes referred to as a cut-and-sewn glove. Although cut-and-sewn gloves are quite common, they also have several drawbacks. For example, the stitched seams often split, and cut-and-sewn gloves can also be uncomfortable because the seams may rub against the wearer's hand. Cut-and-sewn gloves may also not have the desired degree of flexibility because the seams tend to bind or otherwise restrict movement at the finger joints.
Another existing method of making gloves is knitting a seamless, one-piece glove. Knit gloves are made using specialty automated knitting machines that knit seamless, one piece gloves in accordance with the computer program controlling the machine. Unlike cut-and-sewn gloves, knit gloves are made by directly converting yarns into a complete glove such that no sheets of fabric are required. Knit gloves by themselves, however, can be relatively thin and may not provide the insulative properties desired by a user. Linings can be cut and sewn to the knit gloves, but then the gloves will likely have the same drawbacks mentioned above relating to splitting, restriction, and discomfort. Manufacturing knit gloves with a comfortable, flexible, and durable inner liner is accordingly particularly challenging.
Several embodiments of the technology are directed to clothing articles, such as seamless gloves, with an inner liner. For example, in the case of gloves, the liner can be a single piece of an insulating material, such as fleece, spot-attached to the interior surface of an outer layer with adhesive. The inner liner can be attached to the outer layer when the outer layer is inside-out and in a partially stretched state. When the outer layer is in an unstretched state and is in “right-side-out” position with the inner liner adhered therein, the edges of the inner liner are firmly pressed together to provide a substantially seamless interior.
In another embodiment, a clothing article can include an outer layer, such as a knit outer layer, having an interior surface and an exterior surface opposite the interior surface. The clothing article can further include a liner having a first side, a second side opposite the first side, and a perimeter portion. An adhesive can be positioned between the first side of the liner and the interior surface of the knit outer layer. The perimeter portion of the liner can be compressed or merged into itself to form a generally seamless second side of the liner. In particular embodiments, the clothing article comprises a glove, sock, or hat.
In some embodiments, the adhesive is distributed in an adhesive pattern having adhesive spotting. The adhesive spotting can have different concentrations or densities on different portions of the liner. For example, in the case of gloves, the adhesive spotting may have a first spotting density on a finger or fingertip portion of the liner and a different spotting density on a center or palm portion of the liner. In further embodiments, the adhesive pattern includes adhesive spotting generally adjacent to the perimeter portion of the liner. In other embodiments, the adhesive pattern comprises a grid pattern. In some embodiments, the adhesive comprises a one-part epoxy or a two-part epoxy. In some embodiments, at least one of the outer layer or the liner comprises fleece, wool, cotton, canvas, or leather. In particular embodiments, at least a portion of the outer layer comprises electrically conductive fibers.
In another embodiment, a process for manufacturing a glove includes stretching an outer layer inside-out over a glove form, such that an interior surface of the outer layer faces outward. The process further includes cutting a liner having a first side and a second side opposite the first side. An adhesive is deposited in an adhesive pattern onto the first side of the liner. The adhesive is fused to the interior surface of the outer layer, thereby affixing the first side of the liner to the interior surface of the outer layer to form the glove. In some embodiments, the fusing comprises at least one of a heat or pressure treatment, and, in some cases, can include clamping the liner to the outer layer. The process includes removing the glove from the glove form and inverting the glove to a right-side-out configuration, thereby compressing at least a portion of the outer layer and the liner.
Specific details of several embodiments of the technology are described below with reference to
In several embodiments, the outer layer 110 is a seamless knit glove having an ultrafine gauge (e.g. from about 10 gauge to about 18 gauge). In other embodiments, the outer layer 110 can have a cut-and-sew construction. The outer layer 110 can comprise various types of materials, including cotton, polyester, synthetics, Kevlar, nylon, etc. In particular embodiments, for example, the yarn includes the flame-resistant Nomex®, an aramid fiber, (Nomex N303) produced by The DuPont Company. The outer layer 110 can be knit of any of a variety of yarns, such as yarns that incorporate an elastane fiber (e.g., Lycra® spandex made by Invista, Inc). Outer layers 110 that include an elastane fiber exhibit good stretch and return characteristics (e.g., elasticity) which provides good form fitting (e.g., close fitting to the human hand). Also, a single sized glove can fit a variety of hand sizes because the elasticity allows small gloves to expand and comfortably fit larger hands. The outer layer 110 can be manufactured using knitting machines that are computer controlled to automatically produce a one-piece, seamless glove to which the liner 120 can be attached. Suitable computer-controlled glove knitting machines for producing basic knit fabric gloves are well known in the trade, such as the computer controlled knitting machines made by Shima Seiki Mfg. Ltd. of Wakayama, Japan.
In further embodiments, various materials can be used to enhance the glove's construction and provide for special uses for the glove 100. For example, the glove 100 can include leather fingerpads or palm pads that can be bonded or otherwise affixed to the outer layer 110, polyvinyl emulsion printed and cured onto the glove palm to enhance the gripping surface, rubber-like foam material (e.g., neoprene) to shock-isolate the palm of the hand from vibrations (e.g., from a jack-hammer), or heavier weight material on the back of the glove than on the palm (or vice-versa) to increase thermal insulation. In some embodiments, the outer layer 110 materials can be selected for having particular properties such as flame- or water-resistance, high durability, or grip features (i.e., high-friction). For example, the glove 100 can include wear-resistant portions on the places of the glove 100 most likely to be abused or abraded, or areas that are used to grip items or protect a person's hand. Similarly, in the case of socks, in some embodiments a manufactured sock can include multiple layers on a portion of the sock (e.g., the bottom of the sock) to provide, as an example, increased insulative, absorptive, or durability characteristics. For example, a multi-layer sock can include one or multiple layers of liner, outer layer, waterproof material, wear-resistant material, and/or other layer.
In still further embodiments, a portion of the glove 100, such as the fingertip region of the outer layer 110, can include metallic or other electrically conductive material fibers that engage the fingertips of the wearer's hand to allow the wearer to operate capacitive touch screen devices such as mobile phones or tablets without removing the glove from the user's hands. In particular embodiments, silver-coated nylon fibers are knit into the outer layer in the fingertip area of one or more fingers (including the thumb). These electrically conductive fibers are sufficiently flexible so as to avoid sacrificing tactile perception or finger dexterity. In further embodiments, such conductive fibers or wires are positioned between the outer layer 110 and the liner 120.
The difference in dimensions between the outer layer 110 and the glove form 240 (i.e., how much wider/longer the glove form 240 is than the outer layer 110) can vary in alternate embodiments to produce gloves having different resulting properties. For example, the wider the glove form 240, the greater the resulting compression when the outer layer 110 is removed from the glove form 240 after the liner 120 has been attached. The narrower the glove form 240, the less the resulting compression when the outer layer 110 is removed from the glove form 240. The preferred degree of compression (and the corresponding preferred glove form 240 size) can be selected depending on various factors, such as the material selections for the outer layer 110 and the liner 120, and the acceptable level of compression/expansion stress that can be applied to these materials.
The glove form 240 can be made of metal or other materials having sufficient stiffness to provide a form for stretching the outer layer 110 without buckling. In several embodiments, the glove form 240 is made of aluminum (e.g., sheet aluminum). The glove form 240 can have a constant thickness or can have different thicknesses at different portions.
In several embodiments, the liner 120 comprises a single piece of material that will cover both the palm and back sides of a user's hand. In the illustrated embodiment, for example, the liner 120 comprises a back side 124 integrally connected to a palm side 122, and the palm-side 122 has a shorter finger portion than the back side 124. In this embodiment, the palm side 122 extends only up to approximately the second knuckle of the user, so that portion of the liner will not cover the wearer's fingertips. This construction allows the user's fingertips to directly contact the electrically conductive fibers in the fingertip areas of the glove 100 without interference from the liner 120. This construction also provides the user's fingertips with improved dexterity and tactile function when wearing the gloves because there is less material (i.e., no liner 120) between the fingertips and an object being handled. In further embodiments, the liner 120 can extend the entire length of the finger portion (i.e., does not stop at the second knuckle). In yet other embodiments, the liner 120 can be shaped and sized so more of the finger portion (or only some of the finger portions) are liner-free. In some embodiments, the liner 120 can be cut with the use of a die, such as a steel rule die.
As shown in
The printing screen 566 can comprise a generally flat plate having an aperture pattern 570 corresponding to a desired adhesive pattern for the liner 120. The apertures in the pattern extend fully through the printing screen and are in direct communication with the liner 120. The printing screen 566 can be a metal material, such as aluminum or steel, or other material having sufficient strength and stiffness to support processing. As will be discussed in further detail below, the aperture pattern 570 can vary in different embodiments of the technology.
An adhesive can be spread over the printing screen 566, causing the adhesive to fill only the individual apertures in the aperture pattern 570 and be applied to the liner 120 in an arrangement matching the aperture pattern 570. The printing screen 566 accordingly functions like a silk screen. The adhesive can be dispersed over the printing screen 566 with a spreader, such as a squeegee. This can ensure that the adhesive will uniformly fill all the apertures in the aperture pattern 570 such that the adhesive will be deposited on, and remain on, the liner 120 when the printing screen is lifted off of the liner, thereby making a complete, uniform adhesive distribution in the adhesive pattern on the liner 120.
The individual apertures in the aperture pattern 570 can have varying diameters in various embodiments of the technology. In particular embodiments, the individual apertures are about 0.068 inch in diameter. In another embodiment, the individual apertures can have larger diameters, such as about 0.094 inch in diameter. The individual apertures may or may not have a consistent diameter across the aperture pattern 570. The individual apertures can be spaced apart by a range of dimensions (e.g., 0.250 inch in one embodiment). The apertures can be larger or smaller or in shapes other than circles in further embodiments, and can be spaced apart by different distances. The adhesive can be applied in different thicknesses with the printing screen 566. In a particular embodiment, the adhesive is applied while using a screen made of 0.026 inch thick sheet metal. The amount of adhesive applied using the screen printing technique may be varied by using screens made of differing thickness.
In one embodiment, a one-component epoxy adhesive is used. In a particular embodiment, the adhesive is manufactured by Epoxies Etc. of Cranston, R.I., and is product number 10-3782. As will be discussed in further detail below, the adhesive can be heat-activated to cure. In another embodiment, the adhesive comprises Grilltex® 8E P2-2 made by Ems-Chemie Inc., of Sumter, S.C. The particle size of Grilltex® is approximately from about 200 to about 300 microns, and the activation temperature is approximately 275° F.
In further embodiments, a 2-part epoxy type adhesive can be used. The adhesive can begin as two fluids mixed together in particular proportions and applied as a liquid. In a short time, by means of a chemical reaction, the two liquids become a solid bond. The epoxy can exhibit shore hardness of D-80. In a particular embodiment, 3M® Epoxy Adhesive #DP-460 Off-White 2-part Epoxy can be used. In other embodiments, other 2-part epoxies can be used.
In still further embodiments, an ultra-violet (UV) light activated adhesive can be used. The adhesive can exhibit a hardening delay after activation to allow an extended processing time. In a particular embodiment, the UV light-activated product Loctite® 3355 can be used. The Loctite® can cure at room temperature or rapidly cure when exposed to low temperature heat. In other embodiments, other UV-activated adhesives can be used.
In another embodiment, a B-stageable epoxy adhesive can be used. The adhesive can be exposed to low temperature curing into a B-stage that can later be re-liquefied and cured after glove assembly and clamping at an even more elevated temperature. In a particular embodiment, Epoxy Technology EPO-TEK® B9021-13 can be used, but other materials can be used in other embodiments.
In other embodiments, still further spot patterns of adhesive can be used. For example, as shown in
In several embodiments, the liner 120 is folded around a straight edge of the glove form 240. The straight edge of the glove form 240 allows the inner liner 120 to fold easily, accurately and smoothly over the straight edge of the outer layer when on the form without buckling or bundling. This glove form 240 also allows the use of a more simple shape for the inner liner material with less waste. As shown in
In one embodiment, the liner 120 is formed so that the finger portions are partially separated by cuts formed by the cutting die, except that the cuts terminate just before the ends of the finger portions. As a result, each of the finger portions is temporarily connected to the adjacent finger portions by a small, uncut piece of the liner material (i.e., connection portions) between the finger portions. These connection portions help keep the finger portions properly aligned relative to each other and relative to the outer glove layer 110 when the liner material is being wrapped onto the glove on the glove form. This allows for more accurate and faster positioning of the finger portions over the glove and glove form during the manufacturing process. After the liner 120 is securely adhered to the outer layer 110, the connection portions can be severed.
In further embodiments, additional liners or portions of liners may be applied in layers to create a multi-ply glove 100. For example, an additional layer can be applied in the knuckle area of the glove for additional protection. The stretchability of the glove can be controlled or reduced by selecting the number of layers and the means by which the layers are bonded together. In still further embodiments, functional components such as a heating element, wiring, and/or controls are sandwiched between the liner 120 and the outer layer 110.
In several embodiments, the adhesive is activated by heat. For example, the clamping device 880 can be placed between two heated platens that activate the adhesive to cause the liner 120 to affix to the outer layer 110. In some embodiments, the adhesive is activated in a convection oven fitted with a thermal controller with capacity to heat to at least 255° F. In a particular embodiment, the glove 100 is heated at 100° C. (212° F.) for approximately 1 hour, or at 120° C. (248° F.) for approximately 15 minutes. In further embodiments, the outer layer 110 and the liner 120 positioned on the glove form 240 is placed in a heater oven, outside of the clamping device 880. In some embodiments, the glove 100 is cooled (e.g., to room temperature) after heat curing and prior to removing the glove 100 from the glove form 240.
The gloves 100 disclosed herein offer several advantages over traditional gloves. The substantially seamless construction provides improved comfort to the user and can have enhanced durability compared to gloves with stitched seams that are potentially vulnerable to splitting. The method also produces less liner material waste than embodiments having multi-piece liners, as multi-piece liners require more unused material between the individual liner pieces.
From the foregoing, it will be appreciated that specific embodiments of the invention have been described herein for purposes of illustration, but that various modifications may be made without deviating from the spirit and scope of the invention. Further, certain aspects of the new technology described in the context of particular embodiments may be combined or eliminated in other embodiments. Moreover, while advantages associated with certain embodiments of the technology have been described in the context of those embodiments, other embodiments may also exhibit such advantages, and not all embodiments need necessarily exhibit such advantages to fall within the scope of the invention. Accordingly, the disclosure and associated technology can encompass other embodiments not expressly shown or described herein. Thus, the disclosure is not limited except as by the appended claims.
The present application is a continuation of U.S. patent application Ser. No. 13/789,599, filed Mar. 7, 2013 and titled LINED CLOTHING ARTICLES AND METHODS OF MANUFACTURING, which claims priority to and the benefit of U.S. Provisional Patent Application No. 61/609,208, filed Mar. 9, 2012 and titled LINED KNIT GLOVES AND METHODS OF MANUFACTURING, both of which are incorporated herein by reference in their entireties.
Number | Date | Country | |
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61609208 | Mar 2012 | US |
Number | Date | Country | |
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Parent | 13789599 | Mar 2013 | US |
Child | 15141740 | US |