Patent Document

BACKGROUND 
       [0001]    The present invention generally relates to containers that may be used to hold fluids and other materials, and more specifically to a container system that comprises a container and a removable cover that may be placed over the exterior side surface of the container to conceal the contents of the container from view. 
         [0002]    In the biomedical field, it is common for health care providers to utilize containers (sometimes also referred to as canisters or reservoirs) as a part of patient treatment to collect and temporarily store exudate and other bodily fluids. Such treatments may include negative pressure wound therapy, blood transfusions, kidney dialysis, surgery, ivy and other medical treatments and procedures. The containers are typically constructed of glass or a plastic material and are often generally frusto-conical or cylindrical in shape. This type of construction is used because it makes the containers durable and easy to sterilize. The containers are also typically hermetically sealed with a lid, so that the contents are isolated from the surrounding environment. This prevents potentially harmful biological waste from being dispersed to the environment, where it may present a significant risk of harm to persons in the environs. 
         [0003]    The exterior side surface of the containers is also typically constructed of a transparent material so that the health care provider may observe the contents of the container for purposes of monitoring patient treatment. For example, the health care provider may need to monitor the types of fluids (e.g., blood or fecal material) present in the container, as well as make periodic measurements of the volume of fluid or other material in the container. The transparent nature of the container allows the health care provider to perform these functions without the need to directly contact the fluids and materials in the container. When the contents of the container reach a predetermined level, or if the container is no longer needed as a part of the patient treatment, or for other reasons, the container may be removed. After termination of its use, the contents of the container are typically either emptied from the container, which may be reused after sterilization, or the container is disposed of along with its contents. 
         [0004]    The transparent side surface of the containers, however, also presents certain disadvantages. For example, the exudate and fluid in the container may comprise pustular material, blood, urine, fecal matter, and other bodily fluids and biological waste materials. These fluids and materials usually have a very distasteful and unpleasant appearance. Thus, health care providers, patients and their visitors are often exposed to this unpleasantness, which can create feelings of awkwardness and embarrassment in those present. In addition, it is sometimes necessary for the health care provider to attend to the container during hours of darkness. The containers do not stand out in a dark room, so it may be difficult for the health care provider to locate them without turning on a light in the room. If the patient is sleeping, this can be a source of alarm and discomfort for the patient. Further, the containers are sometimes accidentally dropped or knocked from the platform where they are positioned. In these cases, the container may break, and sometimes shatter, releasing the contents of the container into the surrounding environment. 
         [0005]    There is therefore a need for a container system that holds liquids and other materials produced during patient treatment, wherein the container system provides a means to cover the side surfaces of the container in a manner that allows the health care provider easy access to the container to observe fluid characteristics, while at the same time concealing the contents of the container from the view of others within visual distance of the container. This covering means must provide for a quick, easy and convenient way to cover and uncover the side surface of the container. In addition, the covering means should be flexible in the amount of the side surface that may be covered, so that it may cover much of the container, but leave a designation portion uncovered for visual access to the contents of the container by the health care provider. Further, it may be desirable for the covering means may have coloring or other characteristics that cause it to fluoresce in the darkness, so that the container can be easily located in a dark room. Further still, it is desirable that the covering means incorporate scales for measuring distance between two points, as well as the quantity of the contents of the container. Preferably, the covering means also allows the health care provider to record desired information on its surface, so that the information is retained in close proximity to the container when it is being used, but may then be removed from the container when the container is removed or discarded. In addition, it is desirable that the covering means provide an additional support for the side surfaces of the container, so that the container is more resistant to breakage, and if it does break, is more resistant to shattering, should the container be accidentally dropped. 
       SUMMARY 
       [0006]    The present invention is directed to an appliance and methods that satisfy the needs described above. As described in greater detail below, they have many advantages over existing containers and methods when used for their intended purpose, as well as novel features that result in a new appliance and methods that are not anticipated, rendered obvious, suggested, or even implied by any of the prior art apparatus or methods, either alone or in any combination thereof. 
         [0007]    In accordance with the present invention, an appliance is provided for containing fluids and other materials. Generally, the appliance comprises a container and an opaque flexible cover sheet. The container further comprises an exterior side surface, wherein a substantial portion of the exterior side surface of the container is rigid or semi-rigid and has a smooth texture. The opaque flexible cover sheet has a size and shape adapted to be wrapped around and removably adhered to the substantial portion of the exterior side surface of the container. The opaque flexible cover sheet is removably held in place adjacent to the substantial portion of the exterior side surface of the container by electrostatic attraction between the surface of the cover sheet and the exterior side surface of the container when the cover sheet is wrapped around the substantial portion of the exterior side surface of the container. Preferably, the substantial portion of the exterior side surface of the container is comprised of at least 50% of the surface area of the exterior side surface of the container. In some embodiments, the opaque flexible cover sheet is comprised of a polymer material, such as vinyl. In other embodiments, the opaque flexible cover sheet further comprises indicia, which are positioned on the exterior surface of the opaque flexible cover sheet. The opaque flexible cover sheet may also have an edge bounding a surface thereof, so that the indicia are positioned approximately adjacent to the edge and are capable of measuring the quantity of fluids or other material held within the container. Alternatively, the indicia may be positioned approximately adjacent to the edge and be capable of measuring the distance between at least two points along the edge. The opaque flexible cover sheet may also be further comprised of a material that is fluorescent. 
         [0008]    In still other embodiments, the appliance may further comprise a laminate liner sheet and liner attachment means to removably attach the opaque flexible cover sheet to the laminate liner sheet when the flexible cover sheet is not removably attached to the container. Preferably, the laminate liner sheet is comprised of a polymer material and the liner attachment means is a non-permanent adhesive. In yet other embodiments, the opaque flexible cover sheet may be shaped approximately as a rectangle when laid flat and the exterior side surface of the container may be approximately cylindrical in shape. In these embodiments, the flexible cover sheet is wrapped around and removably attached to the cylindrical exterior side surface of the container. In other embodiments, the exterior side surface of the container may be approximately frusto-conical in shape, and the opaque flexible cover sheet is of a size and shape adapted to be wrapped around and removably attached to the frusto-conical exterior side surface of the container. 
         [0009]    In some embodiments, the opaque flexible cover sheet may be further comprised of a primary portion, at least one detachable portion, and detachable connecting means to detachably connect the primary portion to each at least one detachable portion, so that each at least one detachable portion may be detached from the primary portion. The connecting means may be comprised of a series of perforations separating the primary portion and the at least one detachable portion. In some of these embodiments, the primary portion and the at least one detachable portion may each be shaped approximately as a rectangle when laid flat, and the exterior side surface of the container may be approximately cylindrical in shape, so that the opaque flexible cover sheet is wrapped around and removably attached to the cylindrical exterior side surface of the container. In other of these embodiments, the container may be approximately frusto-conical in shape, and the opaque flexible cover sheet is of a size and shape adapted to be wrapped around and removably attached to the frusto-conical exterior side surface of the container. The opaque flexible cover sheet in these embodiments may also further comprise indicia, which are positioned on the exterior surface of the opaque flexible cover sheet. 
         [0010]    The present invention also includes a method for placing a removable opaque flexible cover sheet on a container. The method comprises the action of wrapping the opaque flexible cover sheet around the container, wherein the opaque flexible cover sheet is removably held in place adjacent to the container by electrostatic attraction between the surface of the opaque flexible cover sheet and the exterior side surface of the container. The container and opaque flexible cover sheet may have substantially the same structure, features, characteristics and operation as containers and opaque flexible cover sheets described elsewhere herein. The method may also further comprise the action of removing the opaque flexible cover sheet from the container by lifting the opaque flexible cover sheet from the container. In embodiments where the opaque flexible cover sheet is further comprised of a primary portion, at least one detachable portion, and detachable connecting means to detachably connect the primary portion to each at least one detachable portion, the method may further comprise the action of removing the at least one detachable portion from the primary portion by disengaging the detachable connecting means. 
         [0011]    As a result, the appliance of the present invention meets the needs described above in the Background section. The container system holds liquids and other materials produced during patient treatment. The appliance also provides a means to cover the side surfaces of the container in a manner that allows the health care provider easy access to the container to observe fluid characteristics, while at the same time concealing the contents of the container from the view of others within visual distance of the container. Thus, health care providers, patients and others are spared the embarrassment and awkwardness that may result from having the contents of the container available for ready viewing. The patient is allowed to retain his or her dignity. The burden on the health care provider in emptying the container is reduced. The health care provider and the patient both have the option of placing the cover sheet on the container when it is appropriate, and to not have the cover in place when it may be dangerous or otherwise disadvantageous to do so. The opaque flexible cover sheet also provides a quick, easy and convenient way to cover and uncover the side surface of the container. For example, the cover sheet is merely wrapped around the exterior side surface of the container and the electrostatic attraction between the cover sheet and the container holds the cover sheet in place without the need for adhesives or connectors. In addition, the opaque flexible cover sheet is flexible in the amount of the side surface of the container that may be covered. The cover sheet may cover much of the container, but leave a designated portion uncovered for visual access to the contents of the container by the health care provider. By detaching one or more of the detachable portions, the portion of the surface that is covered by the opaque flexible cover sheet may be reduced. Further, the opaque flexible cover sheet may have coloring or other characteristics or both that cause it to fluoresce in the darkness, so that the container can be easily located in a dark room. Further still, the opaque flexible cover sheet may incorporate scales for measuring the distance between two points or the quantity of the contents of the container or both. The distance measuring scale may be removed from the opaque flexible cover sheet by the health care provider, so that it can be used for treatment purposes, such as measuring the size of a wound. The opaque flexible cover sheet also allows the health care provider to record desired information on its surface, so that the information is retained in close proximity to the container when it is being used, but may then be removed from the container when the container is removed or discarded. Further, because the opaque flexible cover sheet is comprised of a flexible material whose entire surface is adhered to the exterior side surfaces of the container by electrostatic attraction, the cover sheet provides an additional support for the side surfaces of the container, so that the container is more resistant to breakage, and if it does break, is more resistant to shattering, should the container be accidentally dropped. 
         [0012]    There has thus been outlined, rather broadly, the more primary features of the present invention. There are additional features that are also included in the various embodiments of the invention that are described hereinafter and that form the subject matter of the claims appended hereto. In this respect, it is to be understood that the invention is not limited in its application to the details of construction and to the arrangements of the components set forth in the following description or illustrated in the following drawings. This invention may be embodied in the form illustrated in the accompanying drawings, but the drawings are illustrative only and changes may be made in the specific construction illustrated and described within the scope of the appended claims. The invention is capable of other embodiments and of being practiced and carried out in various ways. Also, it is to be understood that the phraseology and terminology employed herein are for the purpose of the description and should not be regarded as limiting. 
     
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         [0013]    The foregoing summary, as well as the following detailed description of the preferred embodiments of the present invention, will be better understood when read in conjunction with the appended drawings, in which: 
           [0014]      FIG. 1  is a perspective view of an embodiment of an appliance comprising the present invention; 
           [0015]      FIG. 2  is a plan view of the opaque flexible cover sheet of the appliance of  FIG. 1 , as it would appear when lying on a flat surface; 
           [0016]      FIG. 3  is a perspective view of another embodiment of an appliance comprising the present invention; 
           [0017]      FIG. 4  is a plan view of the opaque flexible cover sheet of the appliance of  FIG. 3 , as it would appear when lying on a flat surface; and 
           [0018]      FIG. 5  is an elevation view of the opaque flexible cover sheet of the appliance of  FIG. 3  and  FIG. 4 , as it would appear when lying on a flat surface and positioned on a laminate liner sheet. 
       
    
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS 
       [0019]    In accordance with the present invention, an embodiment of an appliance  10  is illustrated in  FIG. 1 , in which the appliance  10  is comprised of an opaque flexible cover sheet  11  and a container  20 . In  FIG. 1 , the opaque flexible cover sheet  11  is illustrated in position on the container  20  while the cover sheet  11  is removably adhered to a rigid or semi-rigid smooth surface (in this case, a portion of the frusto-conical surface  21 ) of the container  20  by means of electrostatic attraction between the interior surface  12  of the cover sheet  11  facing the container  20  and the portion of the frusto-conical surface  21  of the container  20 . The opaque flexible cover sheet  11  of  FIG. 1  is illustrated in  FIG. 2  as it would appear while lying on a flat surface and prior to being placed in position on the container  20 . When the opaque flexible cover sheet  11  is covering the container  20 , the appliance allows for the contents of the container to be hidden from view. 
         [0020]    The opaque flexible cover sheet  11  is of a size and shape adapted to be wrapped around and removably adhered to a substantial portion of the exterior surface (frusto-conical surface  21  in this embodiment) of the container  20 . For purposes related to this invention, the term “substantial portion” generally means a portion of the container  20  great enough so that the contents (not illustrated) of the container  20  may be hidden from view from the perspective of an observer viewing the container  20 . For example, as illustrated in  FIG. 1 , the container  20  may have an opaque lid  22  that is placed over the top opening  23  of the container  20 . In addition, the container  20  has a bottom surface  24  that is placed against a flat horizontal, and typically opaque, surface (not illustrated). Thus, when the opaque flexible cover sheet  11  is in position on the surface  21  of the frusto-conical portion (or side surface) of the container, the flexible cover sheet  11  covers approximately 80% of the surface  21  of the frusto-conical portion of the container  20 . This combination of features allows the contents of the container  20  to be hidden from view from all directions except a relatively narrow viewing angle positioned above the portion of the container  20  that is not covered by the flexible cover sheet  11 . The portion of the container  20  frusto-conical surface  21  that is not covered by the flexible cover sheet  11  may be left uncovered in order to allow an observer to access a scale imprinted or otherwise incorporated on or in the frusto-conical surface  21  that indicates the level of fluid or other material present in the container  20 . In other embodiments, the flexible cover sheet  11  may cover more of, or all of, the frusto-conical surface  21  of the container  20 . In still other embodiments, the flexible cover sheet  11  may cover less of the frusto-conical surface  21  of the container. For example, the flexible cover sheet  11  may extend only half way around or two thirds of the way around the frusto-conical surface  21  of the container  20 . In addition, rather than being positioned relatively close to the top opening  23  of the container  20  and the bottom surface  24  of the container  20 , as illustrated in  FIG. 1 , the top edge  13  of the flexible cover sheet  11  adjacent to the top opening  23  and the bottom edge  14  of the flexible cover sheet  11  adjacent to the bottom surface  24 , respectively, may each be a greater distance from the top opening  23  or the bottom surface  24 , respectively, than as illustrated in  FIG. 1 . This may be the case, for example, where an observer desires to be able to verify by visual observation that the fluid level in the container  20  is at least as high as the bottom edge  14  of the flexible cover sheet  11  or has exceeded the top edge  13  of the flexible cover sheet  11 . Preferably, the substantial portion of the exterior side surface (frusto-conical surface  21 ) of the container  20  is comprised of at least 50% of the surface area of the exterior side surface  21  of the container  20 . In addition, the substantial portion of the exterior side surface (frusto-conical surface  21 ) of the container  20  is preferably comprised of no more than 100% of the surface area of the exterior side surface  21  of the container  20 . 
         [0021]    The same general principles with respect to covering a substantial portion of the container  20 , as illustrated in  FIG. 1 , applies to other shapes of containers as well. For example, as illustrated in  FIG. 3  and  FIG. 4 , the appliance  110  is comprised of an opaque flexible cover sheet  111  that is approximately rectangular in shape and is used to cover an approximately cylindrically shaped container  120 . It is to be noted that there are many potential shapes of containers and flexible cover sheets that may be used in conjunction with one another to cover a substantial portion of the container in a manner that would effectively hide the contents of the container to the extent desired by the observer. For example, in the embodiment illustrated in  FIG. 1 , the container  20  may be covered by a flexible cover sheet  11  generally shaped as an ellipsoid, polygon, or a combination of such shapes. The preferred shape and size of the flexible cover sheet  11  and the substantial portion of the container  20  to be covered by the flexible cover sheet  11  is dependent upon a number of factors, such as the anticipated use of the container  20 , the particular characteristics of the container  20  (e.g., size, shape, incorporated scales), the area of the substantial portion of the exterior side surface  21  to be covered, the contents of the container  20 , and the preferences of the user of the appliance  10 . 
         [0022]    The flexible cover sheet  11  of  FIG. 1  is generally opaque and may be comprised of any color, combination of colors, shades of colors, or any combination of the same. In addition, the flexible cover sheet  11  may be manufactured from a luminescent material so that the flexible cover sheet  11  may act as a location identifier to help the user locate the container  20 , and to prevent the user of the container  20  from accidentally tipping, touching or moving the container  20 , in a dark room. In addition, the flexible cover sheet  11  may have indicia positioned on the exterior surface  15  thereof that faces away from the container  20 . As illustrated in  FIG. 2 , the indicia  18  may include advertising, marketing, promotional or other similar messages or a combination of such messages. (It is to be noted that the indicia  18 ,  19   a,    19   b  of  FIG. 2  are not illustrated on the exterior surface  15  of the flexible cover sheet  11  illustrated in  FIG. 1 .) The indicia on the flexible cover sheet  11  may also include graphics depicting animate and inanimate objects and other objects or combinations of such objects (not illustrated) in order to provide an aesthetically pleasing appearance. In addition, the indicia may include instructions or directions (not illustrated) regarding the use of the container  20  or its contents. Further, the indicia may include blank spaces (not illustrated) that may be completed with specified information regarding the contents of the container  20  or other matters. For example, the indicia may read “Time: ______ Quantity: ______” so that the user of the container  20  can record the indicated information directly on the appliance  10 . Further still, the indicia may include scales, metrics or other means to measure quantities, distances and other parameters. For example, the vertical edge  16  of the flexible cover sheet  11  illustrated in  FIG. 1  may have a scale  19   a  that may be used to measure the quantity of fluid or other material present in the container  20 . As another example, the edge  17  of the flexible cover sheet  11  may have a scale  19   b  that may be used to measure distance. The indicia  18 ,  19   a,    19   b  may be created using any appropriate means. For example, the indicia  18 ,  19   a,    19   b  may be printed on the exterior surface  15  of the flexible cover sheet  11  using a suitable ink. This represents the preferred means of providing the indicia  18 ,  19   a,    19   b.  Alternatively, the indicia  18 ,  19   a,    19   b  may be positioned on the flexible cover sheet  11  using laser transfer, thermal transfer, color thermal transfer, impact transfer, inkjet transfer, digital offset, or electron beam transfer means or a combination of such means. As yet another alternative, the indicia  18 ,  19   a,    19   b  may be comprised of another material that is attached to the exterior surface  15  of the flexible cover sheet  11 . For example, indicia  18  that represent the logo for a company may be comprised of a thin layer of polymer material (not illustrated), such as vinyl, that is attached to the exterior surface  15  of the flexible cover sheet  11  by any suitable means, such as adhesive, adhesive tape, heat fusion, or any other suitable means or combination of such means. These types of indicia  18  may include what are commonly referred to as “decals” or “stickers”—an adhering layer having an adhesive present on one surface that permits the layer to be attached to the exterior surface  15  of the flexible cover sheet  11 . Further still, the indicia  18 ,  19   a,    19   b  may be fabricated as a part of the flexible cover sheet  11 , where the indicia  18 ,  19   a,    19   b  is comprised of material having a different color from the material comprising the remaining portion of the flexible cover sheet  11 . The preferred indicia  18 ,  19   a,    19   b,  as well as the means of providing it, are dependent upon a number of factors, such as the type of indicia  18 ,  19   a,    19   b  desired, the anticipated use of the container  20 , the particular characteristics of the container  20  (e.g., size, shape, incorporated scales), the area of the substantial portion of the exterior side surface  21  to be covered, the contents of the container  20 , and the preferences of the user of the appliance  10 . 
         [0023]    It is to be noted that the substantial portion of the exterior surface (the frusto-conical portion  21 ) of the container  20  in  FIG. 1  to which the flexible cover sheet  11  is removably adhered is generally rigid or semi-rigid and has a smooth texture. This rigidity and texture may typically be present in containers  20  constructed of materials producing a smooth, rigid or semi-rigid surface, such as glass, rigid polymers (such as acrylic or clear polycarbonate), or a combination of such materials, or such materials in combination with other materials, such as metal, wood or ceramic. Generally, any container commonly available for use in the applicable industry may be used as a part of the appliance  10 , as long as it meets the requirements described herein to produce an electrostatic attraction between the container  20  and the opaque flexible cover sheet  11 . The flexible cover sheet  11  may be constructed of any material that has sufficient tackiness to permit an electrostatic attraction between the flexible cover sheet  11  and the material comprising the portion of the container  20  to which the flexible cover sheet  11  is to be attached. For example, the flexible cover sheet  11  may be constructed of a static vinyl, nylon or polyurethane material that has a static capability and tackiness, or a combination of such materials, for use with containers  20  comprised of glass or rigid polymers, such as acrylic or clear polycarbonate. The preferred material in these cases is vinyl, such as that sold by FLEXcon Company, Inc. of Spencer, Mass., as FLEXmark V-400 series vinyl film. The preferred thickness of the flexible cover sheet  11  is in the range from 50 microns to 150 microns. The more preferred thickness of a flexible cover sheet  11  constructed of vinyl for use with containers  20  comprised of glass or rigid polymers involved in medical applications is 87.5 microns. 
         [0024]    In still other embodiments, as illustrated in  FIG. 3  and  FIG. 4 , the appliance  110  is comprised of a flexible cover sheet  111  having a size and shape adapted to be wrapped around and removably adhered to a substantial portion of the cylindrical exterior surface  121  of a container  120 . The cylindrical exterior surface  121  of the container  120  is generally rigid or semi-rigid, has a smooth texture, and may have substantially the same characteristics, features and functions as the container  20  described above and illustrated in connection with  FIG. 1 . In the illustrated embodiment, the flexible cover sheet  111  is further comprised of a primary portion  130 , two detachable portions  131 ,  132 , and detachable connecting means (described in more detail below) to detachably connect the primary portion  130  to each of the detachable portions  131 ,  132 . Although there are two detachable portions  131 ,  132  comprising the flexible cover sheet  111  in this embodiment, in other embodiments there may be only one detachable portion  131  or  132  or more than two detachable portions  131 ,  132 . In other embodiments, the opaque flexible cover sheet  111  may also be comprised of multiply-detachable detachable portions  132 ,  135 , such as would be the case if two detachable portions  132 ,  135  are positioned adjacent to one another. In such embodiments, one or more of the detachable portions  132 ,  135  may be removed from the primary portion  130 , but they need not all be removed. For example, as illustrated in  FIG. 4 , either one detachable portion  132  or both detachable portions  132 ,  135  may be detached from the primary portion  130 . 
         [0025]    The detachable portions  131 ,  132  are preferably constructed of the same material, and have the same thickness as, the material comprising the primary portion  130 . The detachable portions  131 ,  132  may, however, be constructed of a material different from the material comprising the primary portion  130 , or may be of a different thickness from the thickness of the primary portion  130 , or both. The flexible cover sheet  111 , including its primary portion  130  and the detachable portions  131 ,  132 , may each have substantially the same features, characteristics and functions as the flexible cover sheet  11  described above and illustrated in connection with  FIG. 1  and  FIG. 2 . For example, the flexible cover sheet  111  may have different shapes, the flexible cover sheet  111  may be constructed from any of the materials that may be used to construct the flexible cover sheet  11 , and the flexible cover sheet  111  may have indicia  119   a,    199   b  present on the exterior surface  115  thereof. (It is to be noted that the indicia  119   a,    199   b  are not illustrated on the exterior surface  115  of the flexible cover sheet  111  illustrated in  FIG. 3 .) 
         [0026]    In the illustrated embodiment, the detachable connecting means is comprised of a series of perforations  133 ,  134  positioned along the boundary between the primary portion  130  and the detachable portions  131 ,  132 , respectively. Although the detachable connecting means may be comprised of any suitable means in other embodiments, such as a line on the surface along which the material comprising the flexible cover sheet  111  may be cut using external means (such as scissors), the series of perforations  133 ,  134  are the preferred means. Thus, if desired by the user of the appliance  110 , either or both of the detachable portions  131 ,  132  may be removed by tearing the detachable portions  131 ,  132  away from the primary portion  130  along the perforations  133 ,  134 , respectively. By doing so, the user may position detachable portion  132  on a particular portion of the cylindrical surface  121  of the container  120  in order to measure the quantity of contents in the container  120  above a given level. For example, if the top level of the fluid in the container  120  is positioned one inch above the bottom surface  124 , and the user desires to know the amount of fluid added to the container above this level, the user can detach the detachable portion  132  from the primary portion  130  and position the detachable portion  132  vertically oriented on the cylindrical surface  121  so that the zero level of the indicia  119   a  is at the same level as the fluid (one inch above the bottom surface  124 ). Similarly, the user of the appliance  110  can detach the detachable portion  131  from the primary portion  130  and use it as a ruler to measure distances, such as may be necessary to measure the dimensions of a wound. 
         [0027]    In some embodiments, as illustrated in  FIG. 5 , and referring to the flexible cover sheet  111  of  FIG. 3  and  FIG. 4  as an example, the appliance  110  further comprises a laminate liner sheet  140  and liner attachment means (described in more detail below) to removably attach the flexible cover sheet  111  to the laminate liner sheet  140  when the flexible cover sheet  111  is not removably attached to the container  120 . The laminate liner sheet  140  acts as a supportive backing for the flexible cover sheet  111  prior to its initial use in covering the container  120 . In such embodiments, the flexible cover sheet  111 , including its constituent primary portion  130  and detachable portions  131 ,  132 , is removably held in position adjacent to the laminate liner sheet  140  by the liner attachment means, which may be comprised of electrostatic attraction or an adhesive positioned on the surface  141  of the laminate liner sheet  140  facing the flexible cover sheet  111 . The preferred liner attachment means is a non-permanent adhesive positioned on the surface  141  of the laminate liner sheet  140  between the laminate liner sheet  140  and the flexible cover sheet  111 . The laminate liner sheet  140  may be comprised of any suitable material, such as paper, polymer, cloth, fabric or a combination of such materials. The laminate liner sheet  140  is preferably constructed of a polymer or polymer-blend material. A laminate liner sheet  140  constructed of polymer is preferably in the range of 30 microns to 100 microns thick, and more preferably, is 38 microns thick. The more preferred flexible cover sheet  111  and laminate liner sheet  140  combination is similar to that sold by FLEXcon Company, Inc. of Spencer, Mass., as FLEXmark V-400 series vinyl film with a poly-flat release liner. When the user desires to utilize the flexible cover sheet  111  for purposes of covering the substantial portion of the container  120 , he or she removes the flexible cover sheet  111  from the laminate liner sheet  140  by peeling the flexible cover sheet  111  away from the laminate liner sheet  140 . 
         [0028]    The present invention also includes a method of using the appliance  10 ,  110 . Referring to the appliance  110  of  FIG. 3  and  FIG. 4  as an example, the method comprises the action of wrapping the flexible cover sheet  111  around the substantial portion of the exterior cylindrical surface  121  of the container  120 , so that the opaque flexible cover sheet  111  is held in place against the container  120  by electrostatic attraction. The substantial portion of the exterior surface (the cylindrical surface  121 ) of the container  120  is rigid or semi-rigid and has a smooth texture. The flexible cover sheet  111  has a size and shape adapted to be wrapped around and removably adhered to the substantial portion of the exterior cylindrical surface  121  of the container  120 . The flexible cover sheet  111  is removably held in place adjacent to the substantial portion of the exterior cylindrical surface  121  of the container  120  by electrostatic attraction between the surface of the flexible cover sheet  112  and the exterior cylindrical surface  121  of the container  120  when the flexible cover sheet  111  is wrapped around the substantial portion of the exterior cylindrical surface  121  of the container  120 . In some embodiments, the method further comprises the action of removing one or both of the detachable portions  131 ,  132  from the primary portion  130  by disengaging the detachable connecting means, which comprises tearing the detachable portions  131 ,  132  from the primary portion  130  along the perforations  133 ,  134 , respectively, in this embodiment. In other embodiments, the method further comprises the action of removing the flexible cover sheet  111  from the container  120  by lifting the flexible cover sheet  111  from the container  120 . In yet other embodiments, the method further comprises the action of removing the flexible cover sheet  111  from the laminate liner sheet  140  by peeling the flexible cover sheet  111  away from the laminate liner sheet  140 .

Technology Category: 4