Patent Publication Number: US-2019177028-A1

Title: Cone sleeve with tear strip opening

Description:
FIELD OF THE INVENTION 
     The present invention relates to cone sleeves, in particular for frozen confections such as ice cream cones, comprising a tear strip. 
     BACKGROUND 
     Ice cream cones are a well-known frozen treat. The packaging needs to provide an adequate protection, for food safety reasons, but also needs to be easy to open so that the consumer can easily access to the ice cream cone. 
     Consumers are always looking for new experiences and it is important for the products on the market to provide a distinctive packaging that can differentiate them from the existing packages and have an appeal to the consumer without compromising the protection of the product and the convenient opening. 
     Conventionally, the opening of the cone sleeve is done by horizontally tearing a tab, located in the middle of the sleeve and by pulling this tab around the cone&#39;s circumference. This action has been found in some instances to result in paper delamination making the opening difficult. The delamination occurs in the areas where the cone sleeve is glued together. 
     EP0226958 and EP1484251 disclose cone shaped packaging with a tear tab located externally on the packaging next to a longitudinal seam closing the cone packaging. Both EP0226958 and EP1484251 address the delamination issue. 
     One solution to this problem has been to provide an opening tab for the cone sleeve positioned at below the upper rim of the cone sleeve. In this configuration the sleeve is no more opened by pulling the tab around the cone in a circumferential movement, but by pulling the tab vertically, from top to bottom of the cone. This type of cone sleeves with a vertical opening are known in the art. 
     US2012/0138670 discloses a conical packaging for ice cream wafer with a vertical tear strip. A tab connected to the tear strip is protruding from the rim of the packaging. 
     U.S. Pat. No. 1,672,884 discloses an ice cream cone protector. A portion of the sleeve can be torn away vertically by tabs protruding from the upper rim of the sleeve in order to be inserted in notches of a cap, securing said cap on top of the cone sleeve. 
     In traditional industrial production of cone sleeves, the sleeves are manufactured by stamping out cone sheet blanks from a multitude of sheets at the same time. The blanks are then folded around mandrills into cone shaped sleeves, glued together and excessive material is trimmed the upper edge in a trimming operation to ensure an even edge of the on the upper part of the cone sleeve. A production of the above discussed prior art cone sleeves with protruding tabs are not suitable for this type of industrial production of cone sleeves including a trimming operation. 
     When packaging the ice cream cone, the ice cream cone is inserted into the cone sleeve and the cone sleeve is closed by crimping. In the crimping the cone sleeve&#39;s upper rim is being crimped over the lid by a crimping head. This process is not suitable for the cone sleeves with protruding tabs. If a tab is present on the upper rim of the sleeve, the crimping head will flattened it over the lid during the crimping stage or might crumple it, making the tab hard to access and not usable. The tab might even be torn apart during the crimping operation leaving a defect on the packaging. 
     Thus, there is a need for an alternative opening of packages for ice cream cones that are compatible with industrial cone sleeve manufacturing techniques and allows for an easy opening of the cone sleeve packaging. 
     SUMMARY OF THE INVENTION 
     The present invention provides a solution to above discussed problems and provides a cone sleeve which allows easy opening of the package and does not interfere in the trimming or crimping process and remains accessible after crimping. Moreover the tear tab of the cone sleeves according to the present invention is compatible with industrial cone sleeves manufacturing techniques. 
     Accordingly, the present invention relates to a conical cone sleeve ( 1 ) for frozen confections, comprising a bottom tip ( 2 ) and an upper rim ( 3 ), and said upper rim forms a circular opening suitable for receiving a lid ( 4 ); wherein the cone sleeve ( 1 ) comprises weakening lines ( 7   a,    7   b ) defining a tear strip ( 5 ) with a tear tab ( 6 ) on its upper part, and the cone sleeve ( 1 ) further comprises at least two openings ( 8   a  and  8   b ), at least one on each side of the tear strip ( 5 ) defining the tear tab part ( 6 ) of the tear strip ( 5 ). 
     In a second aspect, the present invention relates to the use of the cone sleeve as discussed above, as a packaging container for a wafer cone filled with a frozen confection such as ice cream, sorbet or combination of ice cream and sorbet. 
     In a third aspect, the present invention relates to a blank for forming a sleeve suitable for packaging an ice cream cone, the blank having an upper edge which is curved at least in part, two sides edges, at least two openings located near the upper edge and two weakening lines extending from the openings, radially to the upper edge. 
     The discussion in the following relating to the cone sleeve also apply to the blank for making a cone sleeve. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG. 1  shows a perspective view of a cone sleeve according to the present invention, without a lid and before crimping operations. 
         FIG. 2  shows a perspective view of a cone sleeve according to the present invention, with a lid ( 4 ) in place. The lowest position of the level of the lid in the cone sleeve is indicated by the lines ( 12 ); and before crimping operations. 
         FIG. 3  shows a perspective view of a cone sleeve according to the present invention, without a lid and before crimping operations; two distances (A) and (B) are shown on the figure. 
         FIG. 4  shows an enlarged and detailed view of the tear strip ( 5 ) area, of the cone sleeve according to the present invention. A width ( 10 ) and depth ( 11 ) of the two openings ( 8   a  and  8   b ) are indicated. Furthermore, the lowest position of the level ( 12 ) of the lid ( 4 ) is also indicated. 
         FIGS. 5 a  and 5 b    show two pictures of cones sleeves after crimping. The pictures are top down views of cone sleeves that are closed by a flat carton lid. 
         FIG. 5 a    shows a cone sleeve according to the prior art without a tear tab. 
         FIG. 5 b    shows a cone sleeve according to the present invention with a tear tab ( 6 ) visible and accessible. 
         FIGS. 6 a  and 6 b    show two pictures of cones sleeves according to the present invention, both pictures are side views. 
         FIG. 6 a    shows a cone sleeve before crimping. 
         FIG. 6 b    shows the cone sleeve disclosed in  FIG. 6 a   , after crimping. The cone is closed by a plastic lid with a 13 mm deep groove. 
         FIG. 6 c    shows a representation of the cone sleeves disclosed in  FIG. 6 b   . The lowest position of the level of the plastic lid is indicated. 
         FIG. 7  shows a picture with a perspective view of the cone sleeve according to the present invention as disclosed in  FIG. 6   b.    
         FIG. 8  shows a picture with a top down view of the cone sleeve according to the present invention as disclosed in  FIG. 6   b.    
         FIG. 9  shows a perspective view of a cone sleeve according to the present invention after crimping on a plastic lid with a groove ( 14 ) such as the one disclosed in  FIGS. 6 a , 6 b  and 6 c   .  FIG. 9  also shows a transversal view with the plastic lid shape in bold line. The lowest position of the level ( 12 ) of the plastic lid is indicated both on the perspective view and the transversal view. Openings ( 8   a  and  8   b ) extend above the lowest position of the level of the lid. 
         FIG. 10  shows an enlarged and detailed view of the tear strip ( 5 ) area, of a particular embodiment of the cone sleeve according to the present invention. In this embodiment two bridges ( 13   a  and  13   b ) closing the two openings ( 8   a  and  8   b ) respectively are indicated. 
         FIG. 11  shows an enlarged and detailed view of the tear strip ( 5 ) area, of a particular embodiment, wherein the two openings ( 8   a  and  8   b ) are circular. 
     
    
    
     DETAILED DESCRIPTION 
     A cone is a three-dimensional geometric shape that extends from a flat base to an apex. In the present invention this apex will be defined as the “bottom tip ( 2 )”, and the base is the matching the upper rim ( 3 ). The axis of a cone is the line passing through the apex, about which the base and the whole cone has a circular symmetry. 
     In a preferred embodiment, the opening ( 8   a ) is adjoining with the weakening line ( 7   a ); and the opening ( 8   b ) is adjoining with the weakening line ( 7   b ). That is to say opening ( 8   a ) ends where the weakening line ( 7   a ) starts, and opening ( 8   b ) ends where the weakening line ( 7   b ) starts. This embodiment is shown in  FIG. 1 . 
     This embodiment creates a continuity between the tear tab ( 6 ) and the tear strip ( 5 ). When a pulling force is applied to the tear tab ( 6 ), the energy will be channeled to the weakening lines ( 7   a  and  7   b ). The weakening lines will break and the sleeve will be open, giving easy access to the product in the cone sleeve packaging. 
     In the present context by “opening” is meant a void of material obtained e.g. by removal of material in the sleeve by cutting or stamping. Alternatively, the initial material may be shaped with the “openings” or “voids”. The removal of the sleeve material e.g. by cutting or stamping removes material in order to leave an empty space or void next to the tear tab ( 6 ). In the context of the present invention said openings can have any shape. The size of the opening may be defined by the parameters: the width ( 10 ) and the depth ( 11 ). An embodiment is shown in  FIG. 4  with the size expressed in millimeter. 
     Furthermore, in the present context by “weakening line” is meant a long, thin area where the material is less strong than the surrounding material. It could be obtained by scoring, perforation, cutting, or any other technical mean known in the art to reduce the thickness or the resistance of the material. 
     For the sake of clarity an enlarged view of the tear tab and the tear strip is proposed in  FIG. 4 .  FIG. 4  highlight the width ( 10 ) and depth ( 11 ) of the openings ( 8   a  and  8   b ). Width and depth are not related to the shape of the openings. For example, in the present  FIG. 4 , said openings ( 8   a  and  8   b ) have triangular shapes. However, the openings may be a variety of shapes e.g. in another embodiment such as in  FIG. 11 , the openings ( 8   a  and  8   b ) may be circular and in that case width ( 10 ) and depth ( 11 ) would have the same value corresponding to the diameter of the opening. 
     In a preferred embodiment of the cone sleeve according to the present invention, each of the two openings ( 8   a  and  8   b ) has a width ( 10 ) along the upper rim ( 3 ) comprised between 5 mm and 30 mm. 
     In a more particular embodiment the two openings may not have the same width, but each width ( 10 ) should be comprised between 5 mm and 30 mm. In a particular preferred embodiment of the invention, the opening ( 8   a  and  8   b ) may be triangular cuts. 
     It has been found that with a length of below 5 mm, the tear tab ( 6 ) may be overlap by the rest of the upper rim ( 3 ) when the crimping is completed; in that case the tear tab would not be easily accessible. With a length longer than 30 mm, the tear tab ( 6 ) has been found to be easily accessible, but after crimping the lid may be not well secured; this could cause involuntary aperture of the lid during manufacturing or transporting operations, and is therefore not preferred. 
     The accessibility of the tear tab after crimping is shown on  FIG. 8 .  FIG. 8  shows how the tear tab ( 6 ) is isolated from the rest of the upper rim after crimping operation, making said tear tab easy to identify and to grab. 
     The two openings ( 8   a  and  8   b ) may have a geometrical shape, for example a triangle, a square, a rectangle, a circle, or part of a circle such as half or quarter of a circle, a flattened circle such as an oval, or part of an oval such as half or quarter of an oval (See for example  FIGS. 10 and 11 ). 
     In the present context by “crimping” is meant the action of joining two materials by deforming one or both, in order to hold them together. In the scope of the present invention, the upper rim ( 3 ) of the sleeves is folded and pressed in order to hold the lid ( 4 ) in place. After crimping, the upper rim is partly overlapping itself ( FIGS. 5 a  and 5 b   ). 
     Crimping on a flat lid are shown in  FIGS. 5 a  and 5 b   .  FIG. 5 a    shows the crimping on a flat lid with a sleeve that does not feature the present invention, the lid is hold in place but no tear tab is visible. 
     On the contrary,  FIG. 5 b    shows a crimping on a flat lid with a sleeve according to the present invention.  FIG. 5 b    shows that the tear tab ( 6 ) is accessible, the lid is hold in place and no gap is formed between the lid and the sleeve. 
     For product safety and quality the sleeve and lid have to provide a protection to the product they contain. If a gap is formed between the sleeve and the lid after crimping, then said product is not fully protected. This situation is undesirable as it might compromise the product quality and safety. 
     In the present context a “gap” means an area where the inner volume, defined by the sleeve and the lid after crimping, communicates with the external environment. 
     In another preferred embodiment, each of the two openings ( 8   a  and  8   b ) has a depth ( 11 ), along the cone sleeve side, in the range between a minimum 5 mm and a maximum, equal to the lowest position of the level ( 12 ) of the lid ( 4 ). 
     In a more particular embodiment the two openings may not have the same depth ( 11 ), but it should be in the range between 5 mm and the lowest position of the level ( 12 ) of the lid ( 4 ). 
     It has been found that with a length of less than 5 mm, and the tear tab ( 6 ) may be overlap by the rest of the upper rim ( 3 ) when the crimping is completed. In that case the tear tab could not be easily accessible. On the other hand it has been found that the depth ( 11 ) should not exceed the lowest position of the level the lid can achieve in the cone sleeve, otherwise a gap may remain on the sleeve side after crimping ( FIGS. 6 a , 6 b , 6 c    and  FIG. 7 ). The lowest position of the level ( 12 ) corresponds to a circular section of the cone sleeve wherein said circular section has the same diameter that the lid ( FIG. 2 ). For example, the depth ( 11 ) should preferably not exceed 10 mm if a flat carton lid is used; or similarly preferably not exceed 25 mm if a plastic lid with a groove is used. 
     The lowest position of the level ( 12 ) of the lid ( 4 ) is shown on  FIG. 2 .  FIG. 2  shows a sleeve according to the present invention with a flat carton lid inserted in the sleeve and pushed down the inner volume of the sleeve so that each part of the edge of the lid is in contact the sleeve inner surface. When the lid cannot be placed further down within the conical shape of the cone sleeve, this is the lowest position of the lid. The lowest position of the level ( 12 ) of the lid depends on the lid diameter, on the diameter of the circle at the base (corresponding to the diameter of the circle matching the upper rim ( 3 )), and on distance (A). Once these 3 parameters are known, the lowest position of the level of the lid can be calculated. 
       FIGS. 6 b   ,  7  and  8  show how a plastic lid with a groove may be used to close the sleeve.  FIG. 6 b    shows the sleeve according to the present invention closed by a plastic lid with a groove. In this embodiment, again, the maximal depth ( 11 ) of the openings ( 8   a  and  8   b ) does not exceed the lowest position of the level ( 12 ) of the lid; thus no gap appears on the side of the sleeve.  FIGS. 7, 8 and 9  show other views of this embodiment; the lid is hold in place after crimping, no gap can be seen and the tear tab is easily accessible. 
     In a particular embodiment, in order to perform the crimping operation of the cone sleeve over a flat lid, the upper part of the sleeve is folded twice; in this embodiment, each of the two folding lines forms a circle parallel to the upper rim and which is between said upper rim and the lowest position of the level ( 12 ) of the lid ( 4 ). The sleeve is folded over itself to form a rigid rim; and in the meantime folded flat over the lid to hold it in place (see  FIGS. 5 a  and 5 b   ). 
     Folding line of the sleeve over the lid may advantageously be at approximatively ⅓ of the distance between the upper rim ( 3 ) and the lowest position of the level ( 12 ) of the lid ( 4 ). The folding line of the sleeve, when the rim part is folded over itself may advantageously be at approximatively ⅔ of the distance between the upper rim ( 3 ) and the lowest position of the level ( 12 ) of the lid ( 4 ). 
     Surprisingly, it has been found that the openings ( 8   a  and  8   b ) do not compromise the crimping efficiency over a flat lid. The rigid rim may be weakened around the tear tab ( 6 ) position, but the lid remains well secured and does not move accidentally. It has been found that the depth ( 11 ) may even be superior to ⅔ of the interval between the upper rim ( 3 ) and the lowest position of the level ( 12 ) of the lid ( 4 ), the crimping quality is sufficient. 
     In another particular embodiment, in order to perform the crimping operation of the cone sleeve over a plastic lid with a groove ( 14 ), the upper part of the sleeve is folded 1 time. In this embodiment, the folding line forms a circle parallel to the upper rim and which is between said upper rim and the lowest position of the level ( 12 ) of the lid ( 4 ). The sleeve is folded over the rim of the plastic lid and engage in the groove ( 14 ) of the plastic rim, see  FIG. 9 . 
     The folding line of the sleeve over the lid could be located approximatively between the ⅓ and the ⅔ of the distance between the upper rim ( 3 ) and the lowest position of the level ( 12 ) of the lid ( 4 ), preferably at approximatively half of the distance between the upper rim ( 3 ) and the lowest position of the level ( 12 ) of the lid ( 4 ). Again it has surprisingly been found, that the openings ( 8   a  and  8   b ) do not compromise the crimping efficiency over the lid. The lid remains well secured and does not move accidentally. It has been found that the depth ( 11 ) may be superior to half the distance between the upper rim ( 3 ) and the lowest position of the level ( 12 ) of the lid ( 4 ), the crimping quality is sufficient. 
     Advantageously, the two corners of the tear tab ( 6 ) are orthogonal. 
     In a particular embodiment of the invention, the tear tab ( 6 ) does not protrude beyond the upper rim ( 3 ). In other words the distance (A) is superior or equal to the distance (B). Distances (A) and (B) are shown on  FIG. 3 . In this particular configuration the tear tab is not affected by the trimming operations. 
     In a particular preferred embodiment of the present invention, the tear tab ( 6 ) is not aligned with the upper rim ( 3 ) but shorter. In other words the distance (A) is superior to the distance (B). Distances (A) and (B) are shown on  FIG. 3 . In a preferred configuration the distance between the bottom tip ( 2 ) and the upper rim ( 3 ) is equal at any point of the upper rim. This desirable configuration is obtained after the trimming operation. Said distance between the bottom tip ( 2 ) and any point of the upper rim ( 3 ) is defined as distance (A). 
     In the particular embodiment, the sleeve is cut out to provide an upper edge ( 9 ) of the tear tab ( 6 ) that is not aligned with the upper rim ( 3 ) of the sleeve ( FIG. 6 b   ). This creates a distance (B), between the upper edge ( 9 ) and the bottom tip ( 2 ), that is less than to the distance (A). 
     In this particular configuration shown in  FIG. 6 b   , the upper edge ( 9 ) of said tear tab ( 6 ) is neither aligned with the upper rim ( 3 ) of the sleeves, nor protruding from the upper rim. The upper edge ( 9 ) of the tear tab ( 6 ) is below the level of the upper rim ( 3 ). 
     In other words it looks like the tear tab is “shorter” than the rest of the upper rim. 
     When the distances (A) and (B) are equivalent it allows the tear tab ( 6 ) to remain unaffected when the cone edge is trimmed to have a well aligned upper rim. To have the distance (B) less than the distance (A) gives a further advantage because the tear tab ( 6 ) will be less, or even not, affected by the crimping operation. 
     This particular embodiment increases the tear tab ( 6 ) accessibility and visibility after crimping ( FIGS. 6 b   ,  7  and  8 ), and still the tear tab is not affected by the cone manufacturing, namely when the sleeve is trimmed. 
     In the present context by “trimming” is meant the action of removing excessive material in order to have lines, edges, or forms of well-defined shapes. Considering cone sleeve packaging; flat sheets are rolled into a conical shape on a mandrel; and the edge of the cone thus obtained is trimmed to be circular with a neat and regular edge. 
     In a further preferred embodiment, the difference in length between the tear tab ( 6 ) and the upper rim ( 3 ) is in the range between 1 and 25 mm, preferably between 5 and 15 mm. That is to say, the difference between distance (A) and distance (B) is between 1 and 25 mm, preferably between 5 and 15 mm. Distance (A) is the distance from the tip of the cone and the upper rim ( 3 ) and distance (B) between the tip of the cone and the upper edge of the tear tab ( 6 ). 
     In a preferred design of the present invention, the weakening lines ( 7   a  and  7   b ) extend in straight lines along the cone sleeve side, perpendicularly to the upper rim ( 3 ). In this particular configuration, the weakening lines ( 7   a  and  7   b ) define a vertical tear strip ( 5 ) ( FIG. 1 ). Vertical is defined respectively to the position of the cone sleeve in the consumers hand, with the upper rim ( 3 ) pointing upward, and the bottom tip ( 2 ) pointing downward. 
     In another preferred design of the present invention, the weakening lines ( 7   a  and  7   b ) extend in curved shapes along the cone sleeve side. This features enable diverse patterns to be created on the side of the cone such as spiral. This also enables the vertical tearing motion to be progressively transformed in a circumferential motion. 
     In a particular embodiment according to the present invention, the weakening lines ( 7   a  and  7   b ) are not parallel. For example the weakening lines could have a saw tooth shape or a wave shape. Moreover, the shape on weakening line ( 7   a ) may be shifted with respect to the shape on weakening line ( 7   b ). This characteristic may enable the creation of attractive pattern on the side of the cone and may add a play value to the tear strip ( 5 ). 
     In a preferred design of the present invention, the upper edge ( 9 ) of said tear tab ( 6 ) is connected to the upper rim ( 3 ) of the sleeve by two bridges ( 13   a  and  13   b ). In this particular design, the upper rim of the sleeve is continuous and the upper edge of the tear tab is merged in the upper rim. In other words, the two openings ( 8   a  and  8   b ) are closed by the two bridges ( 13   a  and  13   b ) respectively. This embodiment is shown in detail in  FIGS. 10 and 11 . 
     It can be advantageous to have these two bridges ( 13   a  and  13   b ) in order to hold in position the tear tab ( 6 ) while manufacturing the sleeve into a cone. Said bridges ( 13   a  and  13   b ) should be as thin as possible, preferably at maximum 3 mm, in order to break easily when the tear tab in pulled; but should be large enough to resist during the manufacturing and trimming operations of the sleeve, preferably at minimum 1 mm. 
     In a particular design the tear tab ( 6 ) may have a color to differentiate it from the rest of the sleeve and to increase the visibility of the tear tab. 
     The openings ( 8   a  and  8   b ) shown in  FIG. 4  are interfering with the upper rim ( 3 ), they are not completely surrounded by the sleeve, thus creating notches in the sleeve upper rim. Whereas in  FIG. 10  and  FIG. 11 , the openings ( 8   a  and  8   b ) are fully surrounded by the sleeve and thus do not create notches in the upper rim. 
     The cone sleeve according to the present invention could be made of a multi-layered material. By multi layered material is meant a material made by the superposition of at least two layers of different or similar materials. Said materials may be selected in a list comprising aluminum, paper, plastic films (polypropylene, polyester), or plastic coating (example polyethylene). 
     In a particular embodiment, it is desirable that at least one layer of said multi layered material is a moisture barrier layer such as a plastic film or a plastic coating, to avoid moisture transfer from the environment to the edible material packed in the cone sleeves. Preferably, said moisture barrier layer should not be perforated otherwise it may lose its properties. In this preferred embodiment, the weakening lines ( 7   a  and  7   b ) are performed in at least one of the layer of the multi-layered material the sleeve is made of; without involving, by perforation or cutting, the moisture barrier layer.