US20120273497A1 - Removable Membrane Having a Truncated Tab - Google Patents
Removable Membrane Having a Truncated Tab Download PDFInfo
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- US20120273497A1 US20120273497A1 US13/095,663 US201113095663A US2012273497A1 US 20120273497 A1 US20120273497 A1 US 20120273497A1 US 201113095663 A US201113095663 A US 201113095663A US 2012273497 A1 US2012273497 A1 US 2012273497A1
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- United States
- Prior art keywords
- edge
- lateral edge
- membrane
- outer perimeter
- lateral
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D77/00—Packages formed by enclosing articles or materials in preformed containers, e.g. boxes, cartons, sacks or bags
- B65D77/10—Container closures formed after filling
- B65D77/20—Container closures formed after filling by applying separate lids or covers, i.e. flexible membrane or foil-like covers
- B65D77/2024—Container closures formed after filling by applying separate lids or covers, i.e. flexible membrane or foil-like covers the cover being welded or adhered to the container
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D2577/00—Packages formed by enclosing articles or materials in preformed containers, e.g. boxes, cartons, sacks, bags
- B65D2577/10—Container closures formed after filling
- B65D2577/20—Container closures formed after filling by applying separate lids or covers
- B65D2577/2025—Multi-layered container, e.g. laminated, coated
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D2577/00—Packages formed by enclosing articles or materials in preformed containers, e.g. boxes, cartons, sacks, bags
- B65D2577/10—Container closures formed after filling
- B65D2577/20—Container closures formed after filling by applying separate lids or covers
- B65D2577/2041—Pull tabs
- B65D2577/205—Pull tabs integral with the closure
Definitions
- This disclosure relates generally to containers and, more particularly, to removable membranes for covering containers.
- Disposable food containers are commonly used to store food products, such as individual-sized portions of yogurt or fruit, for example.
- the typical disposable food container 10 has a removable membrane 12 that acts as a cover for the disposable food container 10 , and the removable membrane 12 may be applied in an automated process that seals the disposable food container 10 .
- a stack of membranes 12 are typically retained in a magazine 14 (shown in FIG. 1B ), which includes a number of vertical rods 16 that collectively maintain the membranes 12 in mutual alignment in a manner that will be described in more detail below.
- a grabber or suction device removes a single membrane 12 from the magazine 14 and place the same on a passing container 10 , which has previously been filled with product (e.g., yogurt, cheese, fruit, etc.).
- product e.g., yogurt, cheese, fruit, etc.
- a lid (not shown), which may be stored in a separate magazine 14 from the magazine containing the stack of membranes 12 , may then be placed on the passing container 10 over the membrane 12 to provide additional protection to the container 10 .
- the removable membrane 12 is typically made of an impermeable foil or film material that is secured by an adhesive, which may be a heat sealable coating or film, to a flange portion 14 formed around the upper circumference of the container 10 .
- the removable membrane 12 is typically sized and shaped to correspond to the perimeter of the flange portion 18 of the container 10 . Generally, this shape is circular, but the perimeter of the flange portion (and the shape of the container 10 itself) may have any shape, such as that of a triangle, an oval, or a square, for example.
- a rounded triangular tab portion 20 may project radially outward of the outer perimeter of the flange portion 18 of the container 10 , as illustrated in FIG. 2 .
- the flange portion 18 in the vicinity of the rounded triangular tab portion 20 may radially extend away from a center portion of the container to correspond in shape to the rounded triangular tab portion 20 .
- the rounded tab portion 20 is defined by a first lateral edge 22 and a second lateral edge 24 , with each of the first and second lateral edges 22 , 24 converging as the rounded tab portion extends away from the outer perimeter of the flange portion 18 .
- the rounded tab portion 20 is further defined by a front edge 26 that extends between the first lateral edge 22 and the second lateral edge 24 .
- the front edge 26 may be semi-circular in shape, and the semi-circle may tangentially intersect each of the first lateral edge 22 and the second lateral edge 24 , as illustrated in FIG. 1B .
- the conventional rounded triangular design of the tab portion 20 has several disadvantages.
- the conventional tab portion 20 is large in relation to the membrane portion 12 , and the relatively large tab portion 20 increases material costs.
- the relatively large tab portion 20 also detracts from the visual appeal of the packaging of the container 10 .
- the large tab portion 20 may interfere with secondary packaging such as shrink-wrap, cardboard sleeves, etc.
- the large tab portion 20 may extend beyond the perimeter of a cardboard sleeve or multipack, and the large tab portion 20 may adversely interact with secondary packaging.
- FIG. 1C a rounded tab portion 20
- FIG. 1D a single semi-circular edge 26 may completely define the rounded tab portion 20 .
- these embodiments suffer from several drawbacks. Importantly, these embodiments may not be usable in conventional magazines 14 such as those consisting of a plurality of rods 16 , as shown in FIG.
- a removable membrane for a disposable food container includes a membrane portion being at least partially defined by a circular outer perimeter edge.
- the removable membrane further includes a truncated tab portion projecting radially outward of the outer perimeter edge of the membrane portion.
- the truncated tab portion is at least partially defined by a first lateral edge and a second lateral edge, with each of the first and second lateral edges converging as the tab portion extends away from the outer perimeter edge of the membrane portion.
- the tab portion is further defined by a forward edge that extends along a straight line between the first lateral edge and second lateral edge, wherein the forward is disposed at an oblique angle relative to the first lateral edge and the second lateral edge.
- FIG. 1A is a perspective view of an known embodiment of a food container having a removable membrane for a cover;
- FIG. 1B is a top view of an known embodiment of a removable membrane showing a plurality of vertical rods of a magazine;
- FIG. 1C is a top view of a further known embodiment of a removable membrane
- FIG. 1D is a top view of a still further known embodiment of a removable membrane
- FIG. 2A is a top view of an embodiment of a removable membrane constructed in accordance with the present disclosure showing a plurality of vertical rods of a magazine;
- FIG. 2B is a partial top view of a further embodiment of a removable membrane constructed in accordance with the present disclosure with the vertical rods of the magazine omitted for clarity;
- FIG. 3A is atop view of a still further embodiment of a removable membrane constructed in accordance with the present disclosure with the vertical rods of the magazine omitted for clarity;
- FIG. 3B is a partial top view of another embodiment of a removable membrane constructed in accordance with the present disclosure with the vertical rods of the magazine omitted for clarity;
- FIG. 4A is a partial top view of still another embodiment of a removable membrane constructed in accordance with the present disclosure with the vertical rods of the magazine omitted for clarity;
- FIG. 4B is a partial top view of a further embodiment of a removable membrane constructed in accordance with the present disclosure with the vertical rods of the magazine omitted for clarity.
- FIGS. 2A to 4B illustrate a removable membrane 28 constructed in accordance with the present disclosure, and which includes a membrane portion 30 and a truncated tab portion 32 .
- the membrane portion 30 is at least partially defined by an outer perimeter edge 34 .
- the truncated tab portion 32 is at least partially defined by a first lateral edge 36 , a second lateral edge 38 , and a forward edge 40 that extends between the first lateral edge 36 and the second lateral edge 38 .
- the forward edge 40 may have the shape of a linear segment or an arc, for example.
- the first lateral edge 36 , the second lateral edge 38 , and the forward edge 40 may collectively take the shape of a truncated triangle.
- the membrane portion 30 and the truncated tab portion 32 may generally have the shape of a teardrop having a flat or relatively flat forward edge 40 .
- each removable membrane 28 may require less material than conventional removable membranes, and the truncated tab design reduces the distance that the tab portion 32 radially extends away from the membrane portion 30 , thereby minimizing the damage or undesirable interaction with the secondary packaging of adjacent item.
- a stack of the removable membranes 12 may be stored in conventional magazines 14 without the need to modify or in any way reconfigure the magazine 14 .
- the removable membrane 28 of the present example has a membrane portion 30 .
- the membrane portion 30 may be defined by the outer perimeter edge 34 that may correspond in shape to the outer perimeter 42 of a flange portion 18 of the container 10 .
- the outer perimeter edge 34 of the embodiment illustrated in FIG. 2A has a generally circular shape.
- Such a circular outer perimeter edge 34 may have any suitable diameter, such as, for example, 79 mm.
- the outer perimeter edge 34 may have the shape of a triangle, an oval, a square, or any other appropriate shape that may correspond to the particular shape of the perimeter of the flange portion of a particular container 10 .
- the removable membrane 28 also includes a truncated tab portion 32 that may project radially outward of the outer perimeter edge 34 of the membrane portion 30 . Said another way, the truncated tab portion 32 that may project radially outward of the outer perimeter 42 of the flange portion 18 of the container 10 when the removable membrane 28 is secured to a food container 10 .
- the membrane portion 30 and the truncated tab portion 32 may be formed from a single piece of material in a die-cutting operation. Therefore, it can be said that the removable membrane 28 constitutes a flat, planar sheet of material that is solid (e.g., non-perforated) and capable of providing an air-tight seal to a food container or other container, as desired.
- the material may be an impermeable foil or film, such as PET, paper/foil/film composites, or paper/film composites, for example.
- the truncated tab portion 32 may be defined by a first lateral edge 36 and a second lateral edge 38 , with each of the first and second lateral edges 36 , 38 converging as the truncated tab portion 32 extends away from the outer perimeter edge 34 of the membrane portion 30 (i.e., as the truncated tab portion 32 extends away from the outer perimeter 42 of the flange portion 18 when the removable membrane 28 is secured to a food container 10 ).
- each of the first and second lateral edges 36 , 38 may converge towards a tab axis 44 that bisects the truncated tab portion 32 and extends through a center point of the circular membrane portion 30 , and each of the first and second lateral edges 36 , 38 may form an angle ⁇ between about 35 degrees and about 55 degrees with the tab axis 44 .
- each of the first and second lateral edges 28 , 30 may form an angle ⁇ of about 45 degrees with the tab axis 44 .
- each of the first and second lateral edges 28 , 30 may be symmetrically disposed about the tab axis 44 .
- first lateral edge 36 and the second lateral edge 38 may be asymmetrically disposed about the tab axis 44 .
- the first lateral edge 36 and the second lateral edge 38 may not converge, but instead may be parallel.
- the first lateral edge 36 and second lateral edge 38 may each be a single linear segment. However, the first lateral edge 36 and second lateral edge 38 may have any desired shape, and each may include one or more linear segments and/or one or more curved segments, for example. Referring again to FIG. 2A , the first lateral edge 36 and second lateral edge 38 may tangentially intersect the outer perimeter edge 34 of the membrane portion 30 . However, the first lateral edge 36 and the second lateral edge 38 may intersect the outer perimeter edge 34 of the membrane portion 30 at any appropriate angle.
- the truncated tab portion 32 may be further defined by a forward edge 40 that extends between the first lateral edge 36 and the second lateral edge 38 .
- the forward edge 40 may extend along a straight line L (shown in FIG. 2A ) between the first lateral edge 36 and the second lateral edge 38 such that the forward edge 40 is a linear segment 46 , and the linear segment 46 may be bisected by the tab axis 44 .
- the linear segment 46 may intersect each of the first and second lateral edges 36 , 38 to form an oblique angle ⁇ such that the truncated tab portion 32 has the shape of a truncated triangle, as illustrated in FIG. 2A .
- the linear segment 46 , the first lateral edge 36 and the second lateral edge 38 may collectively have the general shape of an upper portion (e.g., the upper three sides) of a trapezoid. More specifically, the linear segment 46 , the first lateral edge 36 , and the second lateral edge 38 may each correspond to a top side, an inwardly tapering first lateral side, and an inwardly tapering second lateral side, respectively, of a trapezoid that is wider at the base (i.e., a reference line that is parallel or substantially parallel to the linear segment 46 and that extends between the first and second lateral edges 36 , 38 ) and tapers towards the top (i.e., the linear segment 46 ).
- the linear segment 46 may form an angle ⁇ between about 115 degrees and about 155 degrees with the first lateral edge 36 and the second lateral edge 38 . More specifically, the linear segment 46 may form an angle of 135 degrees (or approximately 135 degrees) with the first lateral edge 36 and the second lateral edge 38 .
- the forward edge 40 and the outer perimeter 42 of the flange portion 18 may be separated by a distance D when the removable membrane 28 is secured to a food container 10 .
- a reference circle 48 may be concentric with the outer perimeter edge 34 and have a diameter equal to a diameter of the outer perimeter edge 34
- a reference line 50 tangent to the reference circle 48 at the intersection of the reference circle 48 and the tab axis 44 may be separated from the forward edge 40 by a distance D.
- the distance D may be any value between about 4 mm and about 10 mm, and, more preferably, the distance D may be about 7 mm.
- the distance D may be any suitable value for a particular application. In alternate examples, shown in FIG.
- a first rounded corner portion 52 may extend from a first end 54 of the forward edge 40 to a distal end 56 of the first lateral edge 36 and a second rounded corner portion 58 may extend from a second end 60 of the forward edge 40 to a distal end 62 of the second lateral edge 38 .
- the forward edge 40 may take the shape of an arc 64 such that the truncated tab portion 32 has the general shape of a truncated triangle having a slightly rounded forward edge.
- the slightly rounded arc 64 , the first lateral edge 36 , and the second lateral edge 38 may collectively have the general shape of an upper portion (e.g., the upper three sides) of a trapezoid.
- the slightly rounded arc 64 , the first lateral edge 36 , and the second lateral edge 38 may each correspond to a top side, an inwardly tapering first lateral side, and an inwardly tapering second lateral side, respectively, of a trapezoid that is wider at the base (i.e., a reference line that extends between the first and second lateral edges 36 , 38 and that is parallel to an arc reference line 66 that is tangent to the arc 64 at a point intersecting the tab axis 44 ) and tapers towards the top (i.e., the arc 64 ).
- the arc 64 may have the shape of a segment of a circle, an oval, or a spline, for example.
- the arc 64 may be symmetrically disposed about the tab axis 44 such that the arc 64 is bisected by the tab axis 44 , as illustrated in FIG. 3A .
- an arc reference line 66 that is tangent to the arc 64 at a point intersecting the tab axis 44 may form an oblique angle ⁇ with each of the first and second lateral edges 36 , 38 .
- the arc reference line 66 may form an angle ⁇ between about 115 degrees and about 155 degrees with each of the first lateral edge 36 and the second lateral edge 38 , and, preferably, the angle ⁇ may be about 45 degrees.
- FIG. 3A an arc reference line 66 that is tangent to the arc 64 at a point intersecting the tab axis 44 may form an oblique angle ⁇ with each of the first and second lateral edges 36 , 38 .
- the arc reference line 66 may form an angle ⁇ between about 115 degrees and about 155 degrees with each of the first lateral edge
- the arc reference line 66 and the outer perimeter 42 of the flange portion 18 may be separated by a distance D when the removable membrane 28 is secured to a food container 10 .
- a reference circle 48 may be concentric with and have a diameter equal to the outer perimeter edge 34
- a reference line 68 tangent to the reference circle 48 at the intersection of the reference circle 48 and the tab axis 44 may be separated from the arc reference line 66 by a distance D.
- the distance D may be any value between about 4 mm and about 10 mm, such as about 7 mm, for example.
- the distance D may be any suitable value for a particular application.
- the radius of curvature of the arc 64 (or the approximate radius of curvature if the arc 64 is not a circular segment) may be sufficiently large such that a first end 70 of the arc 64 non-tangentially intersects a distal end 56 of the first lateral edge 36 and a second end 72 of the arc 64 non-tangentially intersects a distal end 62 of the second lateral edge 38 . More specifically, the arc 64 may have a radius of curvature greater than or equal to 75% of the radius of curvature of the circular outer perimeter edge 34 .
- the arc 64 may have a radius of curvature greater than or equal to the radius of curvature of the circular outer perimeter edge 34 .
- the arc 64 may intersect each of the first and second lateral edges 36 , 38 .
- a first rounded corner portion 74 may extend from the first end 70 of the arc 64 to the distal end 56 of the first lateral edge 36 and a second rounded corner portion 76 may extend from the second end 72 of the arc 64 to the distal end 62 of the second lateral edge 38 .
- a projection 78 of the first end 70 of the arc 64 (wherein the projection 78 extends along the general trajectory of the arc 64 ) non-tangentially intersects a projection 80 of the distal end 56 of the first lateral edge 36 (wherein the projection 80 extends along the general trajectory of the first lateral edge 36 ), and a projection 82 of the second end 72 of the arc 64 (wherein the projection 82 extends along the general trajectory of the arc 64 ) non-tangentially intersects a projection 84 of the distal end 62 of the second lateral edge 38 (wherein the projection 84 extends along the general trajectory of the second lateral edge 38 ).
- the forward edge 40 may take the shape of plurality or a curved segments and/or linear segments that extend in a generally linear direction between the first lateral edge 36 and the second lateral edge 38 .
- the forward edge 40 may include a plurality of curved segments that cooperate to form a sinusoidal edge 86 , and a reference line 88 may extend between the first lateral edge 36 and the second lateral edge 38 to bisect the sinusoidal edge 86 .
- the plurality of curved segments (comprising the sinusoidal edge 86 ) are arranged to collectively extend along the reference line 88 extending between the first lateral edge and second lateral edge 36 , 38 .
- the reference line 88 may intersect each of the first and second lateral edges 28 , 30 to form an oblique angle, as described above.
- FIG. 4B An additional example is shown in FIG. 4B , wherein the forward edge 40 includes a plurality of linear segments that cooperate to form a sawtooth-shaped edge 90 .
- a reference line 92 may extend between the first lateral edge 36 and the second lateral edge 38 to bisect the sawtooth-shaped edge 90 , and the reference line may intersect each of the first and second lateral edges 28 , 30 to form an oblique angle, as described above.
- the plurality of linear segments (comprising the sawtooth-shaped edge 90 ) are arranged to collectively extend along the reference line 92 extending between the first lateral edge and second lateral edge 36 , 38 .
- the reference lines 88 , 92 discussed above and the outer perimeter 42 of the flange portion 18 may be separated by a distance D as described above.
- the distance D may be any value between 4 mm and 10 mm, such as approximately 7 mm, for example.
- the distance D may be any suitable value for a particular application.
- the removable membrane 28 may be stacked and stored in a conventional magazine 14 for use in an automated process that seals the disposable food container 10 .
- a conventional magazine 14 may have a plurality of vertical rods 16 (for example, six rods 16 ) that are disposed in the magazine 14 to be spaced around the perimeter of each of the removable membranes 12 in the stack stored in the magazine 14 .
- the rods 16 are positioned to be in contact with or adjacent to portions of the perimeter of the membrane portion 30 (i.e., the outer perimeter edge 34 ) and the truncated tab portion 32 such that the plurality of rods 16 cooperate to prevent one or more removable membrane 28 from rotating relative to the stack of removable membranes 28 .
- the plurality of rods 16 in the conventional magazine 14 may include a pair a forward rods 16 a, 16 b that are positioned adjacent to the distal ends of each of the first lateral edge 36 and the second lateral edge 38 when a stack of removable membranes 12 are disposed in the magazine 14 .
- the plurality of rods 16 in the conventional magazine 14 may also include at least two rods 16 positioned to be in contact with or adjacent to portions of the outer perimeter edge 34 . So configured, a stack of removable membranes 28 may be stored in conventional magazines 100 without the need to modify or in any way reconfigure the magazine 14 , thereby avoiding extra costs associated with replacing and redesigning existing magazines 14 .
- the truncated tab removable membranes 28 require less material than membranes having conventional triangular tabs, thereby improving the overall aesthetic quality of the packaging and reducing the material cost.
- the above-described truncated tab design reduces the distance that the truncated tab portion 32 radially extends away from the membrane portion 30 , thereby also reducing (or eliminating) the damage or undesirable interaction with secondary packaging caused by the conventional triangular tabs.
- the tab includes a profile that generally resembles a truncated triangle, which may otherwise be referred to as an upper portion of a trapezoid having converging sidewalls, for example, such as a tapered trapezoid. It is this shape that advantageously facilitates operation with the conventional magazine designs, increases aesthetic appeal, and minimizes damage to secondary packaging components.
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Abstract
A removable membrane, or cover, for a disposable food container includes a membrane portion at least partially defined by a circular outer perimeter edge. The removable membrane further includes a truncated tab portion projecting radially outward of the outer perimeter edge of the membrane portion. The truncated tab portion is at least partially defined by a first lateral edge and a second lateral edge, with each of the first and second lateral edges converging as the tab portion extends away from the outer perimeter edge of the membrane portion. The tab portion is further defined by a forward edge that extends along a straight line between the first lateral edge and second lateral edge, wherein the forward edge is disposed at an oblique angle relative to the first lateral edge and the second lateral edge.
Description
- This disclosure relates generally to containers and, more particularly, to removable membranes for covering containers.
- Disposable food containers are commonly used to store food products, such as individual-sized portions of yogurt or fruit, for example. As illustrated in
FIG. 1A , the typicaldisposable food container 10 has aremovable membrane 12 that acts as a cover for thedisposable food container 10, and theremovable membrane 12 may be applied in an automated process that seals thedisposable food container 10. In such an automated process, a stack ofmembranes 12 are typically retained in a magazine 14 (shown inFIG. 1B ), which includes a number ofvertical rods 16 that collectively maintain themembranes 12 in mutual alignment in a manner that will be described in more detail below. Ascontainers 10 pass adjacent to themagazine 14 on a conveyor, for example, a grabber or suction device removes asingle membrane 12 from themagazine 14 and place the same on apassing container 10, which has previously been filled with product (e.g., yogurt, cheese, fruit, etc.). A lid (not shown), which may be stored in aseparate magazine 14 from the magazine containing the stack ofmembranes 12, may then be placed on thepassing container 10 over themembrane 12 to provide additional protection to thecontainer 10. - The
removable membrane 12 is typically made of an impermeable foil or film material that is secured by an adhesive, which may be a heat sealable coating or film, to aflange portion 14 formed around the upper circumference of thecontainer 10. Theremovable membrane 12 is typically sized and shaped to correspond to the perimeter of theflange portion 18 of thecontainer 10. Generally, this shape is circular, but the perimeter of the flange portion (and the shape of thecontainer 10 itself) may have any shape, such as that of a triangle, an oval, or a square, for example. On known removable membranes, a roundedtriangular tab portion 20 may project radially outward of the outer perimeter of theflange portion 18 of thecontainer 10, as illustrated inFIG. 2 . However, theflange portion 18 in the vicinity of the roundedtriangular tab portion 20 may radially extend away from a center portion of the container to correspond in shape to the roundedtriangular tab portion 20. Typically, therounded tab portion 20 is defined by a firstlateral edge 22 and a secondlateral edge 24, with each of the first and secondlateral edges flange portion 18. Therounded tab portion 20 is further defined by afront edge 26 that extends between the firstlateral edge 22 and the secondlateral edge 24. Thefront edge 26 may be semi-circular in shape, and the semi-circle may tangentially intersect each of the firstlateral edge 22 and the secondlateral edge 24, as illustrated inFIG. 1B . - The conventional rounded triangular design of the
tab portion 20 has several disadvantages. For example, theconventional tab portion 20 is large in relation to themembrane portion 12, and the relativelylarge tab portion 20 increases material costs. The relativelylarge tab portion 20 also detracts from the visual appeal of the packaging of thecontainer 10. In addition, thelarge tab portion 20 may interfere with secondary packaging such as shrink-wrap, cardboard sleeves, etc. For example, thelarge tab portion 20 may extend beyond the perimeter of a cardboard sleeve or multipack, and thelarge tab portion 20 may adversely interact with secondary packaging. - Other embodiments of known removable membranes may include a relatively smaller
rounded tab portion 20 than the conventional rounded triangular design. For example, such an embodiment may include arounded tab portion 20, as depicted inFIG. 1C , defined by a firstlateral edge 22 and a secondlateral edge 24 that are mutually-parallel, and afront edge 26 that is a semi-circular arc. In a further embodiment of a knownremovable membrane 12 shown inFIG. 1D , a singlesemi-circular edge 26 may completely define therounded tab portion 20. However, these embodiments suffer from several drawbacks. Importantly, these embodiments may not be usable inconventional magazines 14 such as those consisting of a plurality ofrods 16, as shown inFIG. 1B , because the firstlateral edge 22 and a secondlateral edge 24 in the embodiment shown inFIG. 1C (and the a singlesemi-circular edge 26 of the embodiment shown inFIG. 1D ) do not engage thevertical rods 16 that are positioned adjacent to thetab portion 20. Because the firstlateral edge 22 and a secondlateral edge 24 of the embodiment shown inFIG. 1C (and the a singlesemi-circular edge 26 of the embodiment shown inFIG. 1D ) do not engagevertical rods 16, theremovable membranes 12 stacked in themagazine 14 would rotate relative to otherremovable membranes 12, thereby resulting in misfeeds and jams during use. - In accordance with one exemplary aspect of the present invention, a removable membrane for a disposable food container includes a membrane portion being at least partially defined by a circular outer perimeter edge. The removable membrane further includes a truncated tab portion projecting radially outward of the outer perimeter edge of the membrane portion. The truncated tab portion is at least partially defined by a first lateral edge and a second lateral edge, with each of the first and second lateral edges converging as the tab portion extends away from the outer perimeter edge of the membrane portion. The tab portion is further defined by a forward edge that extends along a straight line between the first lateral edge and second lateral edge, wherein the forward is disposed at an oblique angle relative to the first lateral edge and the second lateral edge.
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FIG. 1A is a perspective view of an known embodiment of a food container having a removable membrane for a cover; -
FIG. 1B is a top view of an known embodiment of a removable membrane showing a plurality of vertical rods of a magazine; -
FIG. 1C is a top view of a further known embodiment of a removable membrane; -
FIG. 1D is a top view of a still further known embodiment of a removable membrane; -
FIG. 2A is a top view of an embodiment of a removable membrane constructed in accordance with the present disclosure showing a plurality of vertical rods of a magazine; -
FIG. 2B is a partial top view of a further embodiment of a removable membrane constructed in accordance with the present disclosure with the vertical rods of the magazine omitted for clarity; -
FIG. 3A is atop view of a still further embodiment of a removable membrane constructed in accordance with the present disclosure with the vertical rods of the magazine omitted for clarity; -
FIG. 3B is a partial top view of another embodiment of a removable membrane constructed in accordance with the present disclosure with the vertical rods of the magazine omitted for clarity; -
FIG. 4A is a partial top view of still another embodiment of a removable membrane constructed in accordance with the present disclosure with the vertical rods of the magazine omitted for clarity; and -
FIG. 4B is a partial top view of a further embodiment of a removable membrane constructed in accordance with the present disclosure with the vertical rods of the magazine omitted for clarity. -
FIGS. 2A to 4B illustrate aremovable membrane 28 constructed in accordance with the present disclosure, and which includes amembrane portion 30 and atruncated tab portion 32. As shown inFIG. 2A , themembrane portion 30 is at least partially defined by anouter perimeter edge 34. Thetruncated tab portion 32 is at least partially defined by a firstlateral edge 36, a secondlateral edge 38, and aforward edge 40 that extends between the firstlateral edge 36 and the secondlateral edge 38. Theforward edge 40 may have the shape of a linear segment or an arc, for example. The firstlateral edge 36, the secondlateral edge 38, and theforward edge 40 may collectively take the shape of a truncated triangle. Said another way, themembrane portion 30 and thetruncated tab portion 32 may generally have the shape of a teardrop having a flat or relatively flatforward edge 40. So configured, eachremovable membrane 28 may require less material than conventional removable membranes, and the truncated tab design reduces the distance that thetab portion 32 radially extends away from themembrane portion 30, thereby minimizing the damage or undesirable interaction with the secondary packaging of adjacent item. Furthermore, a stack of theremovable membranes 12 may be stored inconventional magazines 14 without the need to modify or in any way reconfigure themagazine 14. - Referring to
FIG. 2A and as mentioned, theremovable membrane 28 of the present example has amembrane portion 30. Themembrane portion 30 may be defined by theouter perimeter edge 34 that may correspond in shape to theouter perimeter 42 of aflange portion 18 of thecontainer 10. For example, theouter perimeter edge 34 of the embodiment illustrated inFIG. 2A has a generally circular shape. Such a circularouter perimeter edge 34 may have any suitable diameter, such as, for example, 79 mm. In alternate embodiments, theouter perimeter edge 34 may have the shape of a triangle, an oval, a square, or any other appropriate shape that may correspond to the particular shape of the perimeter of the flange portion of aparticular container 10. - Still referring to
FIG. 2A , theremovable membrane 28 also includes atruncated tab portion 32 that may project radially outward of theouter perimeter edge 34 of themembrane portion 30. Said another way, thetruncated tab portion 32 that may project radially outward of theouter perimeter 42 of theflange portion 18 of thecontainer 10 when theremovable membrane 28 is secured to afood container 10. Themembrane portion 30 and thetruncated tab portion 32 may be formed from a single piece of material in a die-cutting operation. Therefore, it can be said that theremovable membrane 28 constitutes a flat, planar sheet of material that is solid (e.g., non-perforated) and capable of providing an air-tight seal to a food container or other container, as desired. More specifically, the material may be an impermeable foil or film, such as PET, paper/foil/film composites, or paper/film composites, for example. Thetruncated tab portion 32 may be defined by a firstlateral edge 36 and a secondlateral edge 38, with each of the first and second lateral edges 36, 38 converging as thetruncated tab portion 32 extends away from theouter perimeter edge 34 of the membrane portion 30 (i.e., as thetruncated tab portion 32 extends away from theouter perimeter 42 of theflange portion 18 when theremovable membrane 28 is secured to a food container 10). More specifically, each of the first and second lateral edges 36, 38 may converge towards atab axis 44 that bisects thetruncated tab portion 32 and extends through a center point of thecircular membrane portion 30, and each of the first and second lateral edges 36, 38 may form an angle α between about 35 degrees and about 55 degrees with thetab axis 44. For example, each of the first and second lateral edges 28, 30 may form an angle α of about 45 degrees with thetab axis 44. As illustrated inFIG. 2A , each of the first and second lateral edges 28, 30 may be symmetrically disposed about thetab axis 44. However, in alternate examples, the firstlateral edge 36 and the secondlateral edge 38 may be asymmetrically disposed about thetab axis 44. In still other alternate examples, the firstlateral edge 36 and the secondlateral edge 38 may not converge, but instead may be parallel. - As illustrated in
FIG. 2A , the firstlateral edge 36 and secondlateral edge 38 may each be a single linear segment. However, the firstlateral edge 36 and secondlateral edge 38 may have any desired shape, and each may include one or more linear segments and/or one or more curved segments, for example. Referring again toFIG. 2A , the firstlateral edge 36 and secondlateral edge 38 may tangentially intersect theouter perimeter edge 34 of themembrane portion 30. However, the firstlateral edge 36 and the secondlateral edge 38 may intersect theouter perimeter edge 34 of themembrane portion 30 at any appropriate angle. - Still referring to
FIGS. 2A and 2B , thetruncated tab portion 32 may be further defined by aforward edge 40 that extends between the firstlateral edge 36 and the secondlateral edge 38. Theforward edge 40 may extend along a straight line L (shown inFIG. 2A ) between the firstlateral edge 36 and the secondlateral edge 38 such that theforward edge 40 is alinear segment 46, and thelinear segment 46 may be bisected by thetab axis 44. Thelinear segment 46 may intersect each of the first and second lateral edges 36, 38 to form an oblique angle β such that thetruncated tab portion 32 has the shape of a truncated triangle, as illustrated inFIG. 2A . Put another way, thelinear segment 46, the firstlateral edge 36 and the secondlateral edge 38 may collectively have the general shape of an upper portion (e.g., the upper three sides) of a trapezoid. More specifically, thelinear segment 46, the firstlateral edge 36, and the secondlateral edge 38 may each correspond to a top side, an inwardly tapering first lateral side, and an inwardly tapering second lateral side, respectively, of a trapezoid that is wider at the base (i.e., a reference line that is parallel or substantially parallel to thelinear segment 46 and that extends between the first and second lateral edges 36, 38) and tapers towards the top (i.e., the linear segment 46). In an example of theremovable membrane 28, thelinear segment 46 may form an angle β between about 115 degrees and about 155 degrees with the firstlateral edge 36 and the secondlateral edge 38. More specifically, thelinear segment 46 may form an angle of 135 degrees (or approximately 135 degrees) with the firstlateral edge 36 and the secondlateral edge 38. - As illustrated in
FIG. 2A , theforward edge 40 and theouter perimeter 42 of theflange portion 18 may be separated by a distance D when theremovable membrane 28 is secured to afood container 10. More specifically, areference circle 48 may be concentric with theouter perimeter edge 34 and have a diameter equal to a diameter of theouter perimeter edge 34, and areference line 50 tangent to thereference circle 48 at the intersection of thereference circle 48 and thetab axis 44 may be separated from theforward edge 40 by a distance D. Preferably, the distance D may be any value between about 4 mm and about 10 mm, and, more preferably, the distance D may be about 7 mm. However, the distance D may be any suitable value for a particular application. In alternate examples, shown inFIG. 2B , a firstrounded corner portion 52 may extend from afirst end 54 of theforward edge 40 to adistal end 56 of the firstlateral edge 36 and a secondrounded corner portion 58 may extend from asecond end 60 of theforward edge 40 to adistal end 62 of the secondlateral edge 38. - In an alternative embodiment illustrated in
FIG. 3A , theforward edge 40 may take the shape of anarc 64 such that thetruncated tab portion 32 has the general shape of a truncated triangle having a slightly rounded forward edge. Put another way, the slightly roundedarc 64, the firstlateral edge 36, and the secondlateral edge 38 may collectively have the general shape of an upper portion (e.g., the upper three sides) of a trapezoid. More specifically, the slightly roundedarc 64, the firstlateral edge 36, and the secondlateral edge 38 may each correspond to a top side, an inwardly tapering first lateral side, and an inwardly tapering second lateral side, respectively, of a trapezoid that is wider at the base (i.e., a reference line that extends between the first and second lateral edges 36, 38 and that is parallel to anarc reference line 66 that is tangent to thearc 64 at a point intersecting the tab axis 44) and tapers towards the top (i.e., the arc 64). Thearc 64 may have the shape of a segment of a circle, an oval, or a spline, for example. Thearc 64 may be symmetrically disposed about thetab axis 44 such that thearc 64 is bisected by thetab axis 44, as illustrated inFIG. 3A . As shown inFIG. 3A , anarc reference line 66 that is tangent to thearc 64 at a point intersecting thetab axis 44 may form an oblique angle γ with each of the first and second lateral edges 36, 38. For example, thearc reference line 66 may form an angle γ between about 115 degrees and about 155 degrees with each of the firstlateral edge 36 and the secondlateral edge 38, and, preferably, the angle γ may be about 45 degrees. As illustrated inFIG. 3A , thearc reference line 66 and theouter perimeter 42 of theflange portion 18 may be separated by a distance D when theremovable membrane 28 is secured to afood container 10. More specifically, areference circle 48 may be concentric with and have a diameter equal to theouter perimeter edge 34, and areference line 68 tangent to thereference circle 48 at the intersection of thereference circle 48 and thetab axis 44 may be separated from thearc reference line 66 by a distance D. Preferably, the distance D may be any value between about 4 mm and about 10 mm, such as about 7 mm, for example. However, the distance D may be any suitable value for a particular application. - In the embodiment illustrated in
FIGS. 3A and 3B , the radius of curvature of the arc 64 (or the approximate radius of curvature if thearc 64 is not a circular segment) may be sufficiently large such that afirst end 70 of thearc 64 non-tangentially intersects adistal end 56 of the firstlateral edge 36 and asecond end 72 of thearc 64 non-tangentially intersects adistal end 62 of the secondlateral edge 38. More specifically, thearc 64 may have a radius of curvature greater than or equal to 75% of the radius of curvature of the circularouter perimeter edge 34. Preferably, thearc 64 may have a radius of curvature greater than or equal to the radius of curvature of the circularouter perimeter edge 34. In one embodiment, thearc 64 may intersect each of the first and second lateral edges 36, 38. In other embodiments, such as the embodiment illustrated inFIG. 3B , a first rounded corner portion 74 may extend from thefirst end 70 of thearc 64 to thedistal end 56 of the firstlateral edge 36 and a secondrounded corner portion 76 may extend from thesecond end 72 of thearc 64 to thedistal end 62 of the secondlateral edge 38. In such an embodiment, aprojection 78 of thefirst end 70 of the arc 64 (wherein theprojection 78 extends along the general trajectory of the arc 64) non-tangentially intersects aprojection 80 of thedistal end 56 of the first lateral edge 36 (wherein theprojection 80 extends along the general trajectory of the first lateral edge 36), and aprojection 82 of thesecond end 72 of the arc 64 (wherein theprojection 82 extends along the general trajectory of the arc 64) non-tangentially intersects aprojection 84 of thedistal end 62 of the second lateral edge 38 (wherein theprojection 84 extends along the general trajectory of the second lateral edge 38). - In further alternative embodiments, the
forward edge 40 may take the shape of plurality or a curved segments and/or linear segments that extend in a generally linear direction between the firstlateral edge 36 and the secondlateral edge 38. For example, as illustrated inFIG. 4A , theforward edge 40 may include a plurality of curved segments that cooperate to form asinusoidal edge 86, and areference line 88 may extend between the firstlateral edge 36 and the secondlateral edge 38 to bisect thesinusoidal edge 86. Put another way, the plurality of curved segments (comprising the sinusoidal edge 86) are arranged to collectively extend along thereference line 88 extending between the first lateral edge and secondlateral edge reference line 88 may intersect each of the first and second lateral edges 28, 30 to form an oblique angle, as described above. An additional example is shown inFIG. 4B , wherein theforward edge 40 includes a plurality of linear segments that cooperate to form a sawtooth-shapededge 90. Areference line 92 may extend between the firstlateral edge 36 and the secondlateral edge 38 to bisect the sawtooth-shapededge 90, and the reference line may intersect each of the first and second lateral edges 28, 30 to form an oblique angle, as described above. Put another way, the plurality of linear segments (comprising the sawtooth-shaped edge 90) are arranged to collectively extend along thereference line 92 extending between the first lateral edge and secondlateral edge outer perimeter 42 of theflange portion 18 may be separated by a distance D as described above. Preferably, the distance D may be any value between 4 mm and 10 mm, such as approximately 7 mm, for example. However, the distance D may be any suitable value for a particular application. - Configured as described above, the
removable membrane 28 may be stacked and stored in aconventional magazine 14 for use in an automated process that seals thedisposable food container 10. More specifically, as previously discussed and as illustrated inFIG. 2A , aconventional magazine 14 may have a plurality of vertical rods 16 (for example, six rods 16) that are disposed in themagazine 14 to be spaced around the perimeter of each of theremovable membranes 12 in the stack stored in themagazine 14. Therods 16 are positioned to be in contact with or adjacent to portions of the perimeter of the membrane portion 30 (i.e., the outer perimeter edge 34) and thetruncated tab portion 32 such that the plurality ofrods 16 cooperate to prevent one or moreremovable membrane 28 from rotating relative to the stack ofremovable membranes 28. The plurality ofrods 16 in theconventional magazine 14 may include a pair aforward rods lateral edge 36 and the secondlateral edge 38 when a stack ofremovable membranes 12 are disposed in themagazine 14. The plurality ofrods 16 in theconventional magazine 14 may also include at least tworods 16 positioned to be in contact with or adjacent to portions of theouter perimeter edge 34. So configured, a stack ofremovable membranes 28 may be stored in conventional magazines 100 without the need to modify or in any way reconfigure themagazine 14, thereby avoiding extra costs associated with replacing and redesigning existingmagazines 14. - Moreover, as briefly discussed above, the truncated tab
removable membranes 28 require less material than membranes having conventional triangular tabs, thereby improving the overall aesthetic quality of the packaging and reducing the material cost. In addition, the above-described truncated tab design reduces the distance that thetruncated tab portion 32 radially extends away from themembrane portion 30, thereby also reducing (or eliminating) the damage or undesirable interaction with secondary packaging caused by the conventional triangular tabs. - While various examples are described hereinabove as having forward edges 40 of different shapes, it should be appreciated that regardless of whether the
forward edge 40 extends along a straight line, an arc, a sinusoidal shape, a sawtooth-shape, or otherwise, in each configuration the tab includes a profile that generally resembles a truncated triangle, which may otherwise be referred to as an upper portion of a trapezoid having converging sidewalls, for example, such as a tapered trapezoid. It is this shape that advantageously facilitates operation with the conventional magazine designs, increases aesthetic appeal, and minimizes damage to secondary packaging components. - While various embodiments have been described above, this disclosure is not intended to be limited thereto. Variations can be made to the disclosed embodiments that are still within the scope of the appended claims.
Claims (20)
1. A removable membrane for a disposable food container, the removable membrane comprising:
a membrane portion, the membrane portion being at least partially defined by a circular outer perimeter edge; and
a truncated tab portion projecting radially outward of the outer perimeter edge of the membrane portion, the truncated tab portion being at least partially defined by a first lateral edge and a second lateral edge, with each of the first lateral edge and the second lateral edge converging as the tab portion extends away from the outer perimeter edge of the membrane portion, the tab portion being further defined by a forward edge that extends along a straight line between the first lateral edge and second lateral edge, wherein the forward edge is disposed at an oblique angle relative to the first lateral edge and the second lateral edge.
2. The removable membrane of claim 1 , wherein the first lateral edge and the second lateral edge are symmetrically disposed about a tab axis that extends through a center point of the circular outer perimeter edge of the membrane portion.
3. The removable membrane of claim 2 , wherein a reference line tangent to a reference circle at the intersection of the reference circle and the tab axis is separated from the forward edge by a distance between about 4 mm and about 10 mm, and wherein the reference circle is concentric with the outer perimeter edge and has a diameter equal to a diameter of the outer perimeter edge.
4. The removable membrane of claim 1 , wherein a first rounded corner portion extends from a first end of the forward edge to a distal end of the first lateral edge and a second rounded corner portion extends from a second end of the forward edge to a distal end of the second lateral edge, and the linear edge portion of the forward edge extends between and is disposed between the first and second rounded corner portions.
5. The removable membrane of claim 3 , wherein each of the first lateral edge and the second lateral edge tangentially intersect the outer perimeter edge.
6. The removable membrane of claim 1 , wherein the forward edge forms an angle between about 115 degrees and about 155 degrees with the first lateral edge and the second lateral edge.
7. The removable membrane of claim 1 , wherein the forward edge is disposed at an angle of about 135 degrees relative to the first and second lateral edges.
8. The removable membrane of claim 1 , wherein the forward edge comprises a plurality of linear segments arranged to collectively extend along the straight line between the first lateral edge and second lateral edge.
9. The removable membrane of claim 1 , wherein the forward edge comprises a plurality of curved segments arranged to collectively extend along the straight line between the first lateral edge and second lateral edge.
10. A removable membrane for a disposable food container, the removable membrane comprising:
a membrane portion, the membrane portion being at least partially defined by an outer perimeter edge; and
a truncated tab portion projecting radially outward of the outer perimeter edge of the membrane portion, the truncated tab portion being at least partially defined by a first lateral edge and a second lateral edge, with each of the first lateral edge and the second lateral edge converging as the tab portion extends away from the outer perimeter edge of the membrane portion, the tab portion being further defined by a forward edge that extends between the first lateral edge and the second lateral edge such that the forward edge, the first lateral edge, and the second lateral edge collectively have the shape of an upper portion of a trapezoid.
11. The removable membrane of claim 10 , wherein the forward edge extends along a straight line between the first and second lateral edges.
12. The removable membrane of claim 11 , wherein a reference line tangent to a reference circle at the intersection of the reference circle and the tab axis is separated from the forward edge by a distance between about 4 mm and about 10 mm, and wherein the outer perimeter edge has a circular shape and the reference circle is concentric with the outer perimeter edge and has a diameter equal to a diameter of the outer perimeter edge.
13. The removable membrane of claim 10 , wherein the forward edge is an arc.
14. The removable membrane of claim 13 , wherein the outer perimeter edge has a circular shape, and wherein the arc has a radius of curvature equal to or greater than a radius of curvature of the outer perimeter edge.
15. The removable membrane of claim 13 , wherein a first end of the arc non-tangentially intersects a distal end of the first lateral edge and a second end of the arc non-tangentially intersects a distal end of the second lateral edge.
16. The removable membrane of claim 10 , wherein the first lateral edge and the second lateral edge are symmetrically disposed about a tab axis that extends through a center point of the outer perimeter edge of the membrane portion.
17. A system for storing a plurality of removable membranes for disposable food containers, the system comprising:
a magazine having a plurality of vertical rods; and
a plurality of removable membranes stored in the magazine, each removable membrane comprising:
a membrane portion, the membrane portion being at least partially defined by an outer perimeter edge; and
a tab portion projecting radially outward of the outer perimeter edge of the membrane portion, the truncated tab portion being at least partially defined by a first lateral edge and a second lateral edge, with each of the first lateral edge and the second lateral edge converging as the tab portion extends away from the outer perimeter edge of the membrane portion, the tab portion being further defined by a forward edge that extends between the first lateral edge and the second lateral edge such that the forward edge, the first lateral edge, and the second lateral edge collectively have the shape of an upper portion of a trapezoid,
wherein at least two rods of the plurality of rods are adjacent to portions of the outer perimeter edge, at least one rod of the plurality of rods is adjacent to a distal end of the first lateral edge, and at least one rod of the plurality of rods is adjacent to a distal end of the second lateral edge, whereby the plurality of rods cooperate to prevent one or more removable membrane from rotating relative to the plurality of removable membranes stored in the magazine.
18. The system of claim 17 , wherein the forward edge extends along a straight line between the first and second lateral edges.
19. The removable membrane of claim 18 , wherein a reference line tangent to a reference circle at the intersection of the reference circle and the tab axis is separated from the forward edge by a distance between about 4 mm and about 10 mm, and wherein the outer perimeter edge has a circular shape and the reference circle is concentric with the outer perimeter edge and has a diameter equal to a diameter of the outer perimeter edge.
20. The system of claim 17 , wherein the forward edge is an arc.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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US13/095,663 US20120273497A1 (en) | 2011-04-27 | 2011-04-27 | Removable Membrane Having a Truncated Tab |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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US13/095,663 US20120273497A1 (en) | 2011-04-27 | 2011-04-27 | Removable Membrane Having a Truncated Tab |
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US20120273497A1 true US20120273497A1 (en) | 2012-11-01 |
Family
ID=47067113
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Application Number | Title | Priority Date | Filing Date |
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US13/095,663 Abandoned US20120273497A1 (en) | 2011-04-27 | 2011-04-27 | Removable Membrane Having a Truncated Tab |
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Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2776787A (en) * | 1951-02-21 | 1957-01-08 | Brite Ize Cleanser Co | Can closure |
US3612341A (en) * | 1968-10-07 | 1971-10-12 | Metal Box Co Ltd | Wire formed pull-tab |
US5613617A (en) * | 1994-09-27 | 1997-03-25 | Da Vitoria Lobo; Luis J. | Sealed container that is easily opened and mass-produced |
US5950861A (en) * | 1993-09-21 | 1999-09-14 | Polystar Packaging, Incorporated | Press-on closure with peelable end panel |
US20100154264A1 (en) * | 2008-12-18 | 2010-06-24 | Prime Label & Screen, Inc. | Rigid resealable label flap having a hinge |
-
2011
- 2011-04-27 US US13/095,663 patent/US20120273497A1/en not_active Abandoned
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2776787A (en) * | 1951-02-21 | 1957-01-08 | Brite Ize Cleanser Co | Can closure |
US3612341A (en) * | 1968-10-07 | 1971-10-12 | Metal Box Co Ltd | Wire formed pull-tab |
US5950861A (en) * | 1993-09-21 | 1999-09-14 | Polystar Packaging, Incorporated | Press-on closure with peelable end panel |
US5613617A (en) * | 1994-09-27 | 1997-03-25 | Da Vitoria Lobo; Luis J. | Sealed container that is easily opened and mass-produced |
US20100154264A1 (en) * | 2008-12-18 | 2010-06-24 | Prime Label & Screen, Inc. | Rigid resealable label flap having a hinge |
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