The present invention relates in general to the culinary arts, and more particularly, to a slow cooker liner that forms a barrier between food placed within the liner and the interior surfaces a food cooking apparatus, such as a slow cooker.
Slow cookers provide a simple cooking method for cooking particular dishes, including stews, pot roasts, chili, soups, and the like. One popular type of slow cooker is known as a crock pot. Although slow cookers cook these types of dishes in a desirable fashion, the ceramic cooking pot of the slow cooker can often become encrusted with burned on food residue which is difficult to clean. Accordingly, disposable liners may be placed inside the container of the slow cooker to cover the interior surfaces of the slow cooker thereby keeping the food separate from the surfaces of the slow cooker. These liners may include bag-shaped liners having a tubular body sealed at a bottom end and at the sides, and having an opening at a top end. When a user is finished with the slow cooker, the disposable liners can be removed and discarded, leaving little or no clean up.
The known liners for slow cookers, however, have certain shortcomings. For example, when the liners are placed in the slow cooker, excess material near the top or open end of the liner loosely folds over the rim of the slow cooker. This excess and loose liner material may interfere with cooking and may be aesthetically displeasing to the user. Also, the liner may fall into the slow cooker. Furthermore, loose liners tend to settle down into the contents of the crock pot, creating a mess.
The shape of conventional bag-shaped liners has also been a problem. For example, use of known bag-shaped liners may result in food getting trapped in the corners of the liner thereby making it difficult for the user to remove the contents from corner areas of the liner.
There is a need therefore, for an improved slow cooker liner and method for making the improved slow cooker liner. In particular, there is a need for a simple, flexible, replaceable, and durable slow cooker liner having a securing means around the opening perimeter of the liner to keep the excess liner fit snuggly around the outside of the slow cooker, which would be aesthetically pleasing, and that also prevents the liner from falling and/or settling down into the slow cooker. Additionally, there is a need for a slow cooker liner that prevents food from being trapped in the corners of the liner and allows better utility for the liner as far as getting food out of the container.
The present invention is directed to an improved slow cooker liner that may be placed within a cooking apparatus to form and maintain a barrier between the interior surfaces of a cooking apparatus (e.g., a slow cooker) and the food disposed therein. The slow cooker liner may include a bag-shaped liner having a generally tubular, or liner-like, shaped liner body. The liner body includes a closed bottom end, one or more side walls extending upwardly from the closed bottom end, and an open top end. A securing band may be incorporated around a perimeter of the open top end of the liner. When the liner is placed inside the container of a slow cooker, the liner covers the interior surfaces of the container and the open top end of the liner may be folded over the upper rim of the slow cooker. The securing band securely and snugly holds the liner to the exterior surface of the slow cooker thereby improving the aesthetic appearance of the liner while also preventing the liner from settling and/or falling back into the slow cooker.
The slow cooker liner may be placed inside the container or bowl of the slow cooker and disposed over the interior surfaces of the slow cooker (e.g., the closed bottom of the liner covers a bottom panel of the slow cooker and the liner side walls generally cover one or more side walls of the slow cooker). The top end and top opening extend upwardly beyond a top opening or rim of the slow cooker. The liner top end may be folded outwardly over the rim of the slow cooker. The high temperature securing band may keep the excess liner fit snuggly around an outside of the pot, thereby preventing the liner from settling down and/or falling back into the slow cooker.
The securing band may be attached to the perimeter of the liner proximate the liner open top end. For example, the securing band may be adhered to the perimeter of the liner using a high temperature adhesive. The securing band may also be attached to the perimeter of the liner by ultrasonically welding the securing band to the liner. Further, the securing band may be stitched onto the liner with high temperature thread. In addition, the securing band may be attached to the liner by heat sealing the securing band onto the liner.
In one embodiment, the securing band may include a high temperature elastic band incorporated around the perimeter of the open top end of the liner. The elastic band may be stretched to installed the liner over the rim of the slow cooker and is preferably sized to fit securely and snugly around the upper portion of the slow cooker with at least some elastic compression or tension remaining in the elastic band (i.e., the elastic band is still being stretched). In another embodiment, the securing band may include a heat shrink material. The heat shrink material shrinks or contracts as the slow cooker is heated and causes the liner materials to conform to and snugly fit against the outside of the slow cooker.
Preferably, the slow cooker liner is made from a high temperature plastic material, such as a high temperature nylon resin material. The liner material should be suitable for food cooking and food preparation. In one embodiment, the liner and securing band are suitable for use in cooking applications between about 100° F. and 400° F. Preferably, the high temperature liner having a securing band can withstand a temperature of about 400° F.
Preferably, the high temperature securing band may be made from a high temperature elastic polymer, such as a polyester elastomer or polyester film, for example. The securing band may also be made from an elastomeric polyamide based film or resin. The securing band may also be made from a polyurethane material.
In addition to the high temperature securing band, the closed bottom end may include a contoured, or shaped, bottom edge. Preferably, the contoured bottom edge includes a flat bottom end and one or more contoured edges. Each contoured edge may extend outward and upward from an opposite end of the flat bottom edge and may merge and join with the flat bottom edge. Each contoured edge may merge and join at its opposite end with an edge of the side walls.
Preferably, each of the contoured edges can include a substantially straight tapered edge. Each of the tapered edges can be formed having a predetermined angle from a plane defined by the flat bottom edge. Alternatively, each of the contoured edges can include a curved edge.
Additional features and advantages of the invention will be made apparent from the following detailed description of illustrative embodiments that proceeds with reference to the accompanying drawings.
The foregoing and other aspects of the present invention will become apparent from the following detailed description of the invention when considered in conjunction with the accompanying drawings. For the purpose of illustrating the invention, there is shown in the drawings embodiments that are presently preferred, it being understood, however, that the invention is not limited to the specific instrumentalities disclosed. In the drawings:
The present invention is directed slow cooker liner systems having a securing band, for forming and maintaining an improved barrier between a cooking apparatus—such as a slow cooker—and food disposed therein. The slow cooker liner may be designed and constructed to be disposed within the slow cooker and the open top end may be folded outward over the rim of the slow cooker such that the securing band engages an outer surface of the slow cooker. The slow cooker liner may include a size and shape to substantially conform to the container (i.e., the interior surfaces) of a slow cooker.
In accordance with embodiments of the present invention, the slow cooker liner may have a securing band incorporated around a perimeter of an open top end of the liner. The securing band may help keep excess liner material proximate an upper portion of the liner secured and snuggly fit over the rim and around the outside of the slow cooker. The securing band may keep any excess liner out of the way of the cooking process and improve the aesthetic appearance of the slow cooker liner. Also, the securing band may reduce and/or prevent the liner from falling into and/or settling down into the container of the slower cooker and the food contained therein.
The slow cooker liner and securing band are preferably suitable for high temperature applications. As used herein, high temperature means the slow cooker liner and securing band are preferably made from materials suitable for use in high temperature applications of between about 100° F. and about 400° F. Preferably, the improved high temperature liner having a securing band can withstand temperatures up to about 400° F.
In addition, the slow cooker liner may be formed having a contoured bottom edge, thereby preventing food from becoming trapped in the bottom corners of the liner. Accordingly, the improved slow cooker liner having a contoured bottom edge also helps improve food safety, helps maintain food quality, reduces shrinkage, and may reduce labor costs and resource consumption.
As shown, the slow cooker liner system 100 may include a liner having a securing band 110 about the open top end 140 that helps form and maintain an improved barrier between the slow cooker and food which may be disposed within the slow cooker. The exemplary securing band shown in
As shown in
A high temperature securing band 110 may be incorporated around a perimeter of the open top end of the liner 140. The securing band may be located at the distal end of the liner around the peripheral of the open top end 140, or may be located proximate the open top end 140 in an upper portion of the liner and around the periphery of the open top end 140. The securing band 110 may be attached to an inside surface of the liner and/or an outside surface of the liner.
The one or more flexible side walls 130 may extend upwardly from the bottom edge 120, and a top opening 140 may be formed at the opposite top end by a top edge 150 of each of the side walls 130. The closed bottom end 120 may be folded or sealed closed. The one or more side walls 130 may be connected together, preferably along one or more folded or scaled edges 135.
The closed bottom edge 120 and the upwardly extending side walls 130 may define a food holding vessel 145 capable of fitting within a slow cooker container and holding a volume of food that may be disposed therein for heating or cooking. Preferably, the liner 100 is generously sized to afford complete coverage of the slow cooker 200 and allow an excess portion of the liner 100 proximate the top end to be folded outwardly over the top edge and rim 230 of the slow cooker. The securing band 110 may then contract thereby holding the excess portion of the liner to an exterior surface 260 of the slow cooker, as best shown in
Although some forming may occur once the liner has been disposed within the container of the slow cooker, such as moisture adhesion and thermal-forming as the slow cooker is heated, the liner may be preformed having a closed bottom end 120 and upwardly extending sidewalls 130 which may define the food holding vessel 145 which may be sized and shaped to fit within and cover the interior surface 270 of the container of the slow cooker 200. In addition, the weight of the food may also exert some pressure on the liner which also helps to further form the liner to the slow cooker 200.
Table of exemplary elongations and melting points:
The elastic securing band 110 may be attached to the perimeter of the liner. For example, the elastic securing band 110 may be attached to the perimeter of the liner using a high temperature adhesive. Alternatively, the elastic securing band 110 may be attached to the perimeter of the liner by ultrasonically welding the securing band to the liner. In another embodiment, the elastic securing band 110 may be stitched to the liner material using a high temperature thread. In yet another embodiment, the elastic securing band may be heat sealed to the liner.
As shown in
As shown in
In some embodiments, the securing band 110 may be enclosed within the one or more sidewalls as seen in
When the folded portion 185 or liner strip 195 is attached to the securing band 110 and the sidewall 130, the attachment may be along the entire length of the securing band 110 (
There may be several benefits to enclosing the securing band within the side wall. For example, an enclosed securing band may be less likely to come into contact with a food product. This is of significance if the securing band is not approved by the United States Food and Drug Administration for contact with food. Further, if the securing band is comprised of an elastomeric material, such material may become tacky at increased temperatures and stick to the outside of a slow cooker. Enclosing the securing band within the side walls prevents this from occurring. Also, enclosing the securing band within the side walls may provide for a more secure mechanism for adhering the securing band to the liner.
The liner may include a variety of shapes and sizes. Preferably, the shape and size of the liner will correspond to the shape and the size of the slow cooker container that the liner will be used with. In another embodiment, the slow cooker liner may include a shaped bottom edge that corresponds to the shape of the bottom of the slow cooker container. For example, if the slow cooker container has a rectangular-shaped bottom, the slow cooker liner would have a corresponding rectangular-shaped bottom, if the slow cooker container has a square-shaped bottom, the slow cooker liner would have a corresponding square-shaped bottom, if the slow cooker container has an oval-shaped bottom, the slow cooker liner would have a corresponding oval-shaped bottom, etc.
The liner material may be suitable for continuous service under various conditions and may have the following characteristics: suitable for temperature conditions ranging from about 100° F. to about 400° F.; has a good thermal heat transfer rate; has a tensile strength capable of withstanding approximately 13,000 psi without orientation; has a tear strength capable of holding up to about 50 grams/liter; has a tabor strength capable of sustaining about 1000 cycles tested with a load of about 500 grams; has a chemical resistance to most chemicals, such as mineral acids, phenols and concentrated formic acid; has a bacterial and mold resistance making it rot proof and resistant to molds and impermeable to micro-organisms; acts as an odor barrier to most odors; has a grease and oil resistance having an oil-barrier properties effective against animal, vegetable, and mineral oils and fats; allows some moisture-vapor transmission at raised temperatures; is gas impermeable which makes the liner well suited for packaging under nitrogen, carbon dioxide, or vacuum, and is resistant to oxygen permeation which reduces fogging in frozen foods and may help extend shelf-life; is non-scalping (e.g., no flavor loss); and will not block (e.g., will not stick together).
In certain embodiments, the liner material may provide oil and grease resistance and may be manufactured from resins that meet all requirements of the United Sates Food and Drug Administration regulations 21 CFR 177.1500 (a)(1)(6), (b)(1)(6.1) and 21 CFR 178.2010 to produce articles intended for use in the processing, handling and packaging of food products. In addition, embodiments of the liner material may have the following properties as listed in Table 1.
The liner may be made from a durable and high temperature plastic material or nylon film, such as a nylon resin. For example, the liner may be made from a high temperature nylon or polyester, such as a material from the polyamide family including nylon 3, 4, 6, 9, 11, 12, and triple nylons. An exemplary nylon resin material that is suitable for use with the present invention may include MONOLYN™ material manufactured by M&Q Plastic Products. The thickness of the liner may range between, for example, 0.8 mils and 1.0 mils.
In yet another embodiment, the entire liner and/or part of the liner may be made out of high temperature elastic films like polyester elastomer or PEBAX (i.e., a polyamide elastomer), so that it fits snuggly about the vessel, with no excess bag for food to get trapped in. In this embodiment, the bag-shaped liner would stretch around the rim or lip of the slow cooker to improve the cooking process and provide a nice, neat appearance.
In another embodiment, the entire liner and/or part of the liner may be made out of a thin, high temperature clingy film, similar to Saran wrap, so that it clings snugly around the surface area of the container. This design and construction would improve the aesthetic appearance and performance of the liner and would again eliminate excess bag for food to get trapped in.
In another embodiment of the invention, a thin walled vessel may be thermoformed out of nylon or some other high temperature thermo formable plastic, instead of creating a bag to line the slow cooker. This thermoformed vessel would slide down inside the slow cooker container to act a barrier between the interior surfaces of the slow cooker and the food contained therein.
The thermoformed vessel may also fit snuggly so that food cannot get trapped. The thermoformed vessel may be sized so that it will not extend beyond the top of the slow cooker liner container, so that there is no excess liner material to worry about. Also, the thermoformed vessel liner could be fluted, to help control heat transfer between the slow cooker wall and the liner, and hence prevent burning of the food. These thermoformed vessel liners may “nest together”—like paper coffee filters or paper cup cake liners—when being stored prior to use.
The improved liner may be a removable, replaceable, flexible, disposable, durable, high temperature, plastic liner that may be disposed within a container of a slow cooker to cover the interior surfaces of the container. The liner may be provided to keep food separate from the interior surface of the container thereby preventing food contained within the slow cooker container from “baking-on” and/or “burning-on” the surfaces of the slow cooker. Embodiments of the slow cooker liner may also help improve food safety and quality, enhance flavor and juiciness of foods, minimize clean up time, and reduce shrinkage by allowing left over food to be removed from the slow cooker and saved in the liner for further use.
Although illustrated and described herein with reference to certain specific embodiments, it will be understood by those skilled in the art that the invention is not limited to the embodiments specifically disclosed herein. Those skilled in the art also will appreciate that many other variations for the specific embodiments described herein are intended to be within the scope of the invention as defined by the following claims.
This application claims the benefit of U.S. Application No. 60/910,275, filed Apr. 5, 2007, the entirety of which is incorporated by reference herein.
Filing Document | Filing Date | Country | Kind | 371c Date |
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PCT/US08/59404 | 4/4/2008 | WO | 00 | 7/11/2008 |
Number | Date | Country | |
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60910275 | Apr 2007 | US |