Abstract:
The invention relates to a flip open box package, such as a cigarette pack, with enhanced aroma due to encapsulated flavor materials incorporated on the interior surface of the flip top. The encapsulated flavor is released upon opening of the box by frictional interaction of frame components or with the product.

Description:
BACKGROUND OF THE INVENTION  
         [0001]    1. FIELD OF THE INVENTION  
           [0002]    The invention relates to a flip open package with microencapsulated flavor applied to the inner surface of the outer frame which is released to the air by frictional contact with the inner frame of the package as the top is opened.  
           [0003]    2. Discussion of the Prior Art  
           [0004]    Microencapsulation is a process by which a core material is captured within a second material or shell. It is well known in the field to encapsulate aromas and flavors in shells of varying sizes so that the flavor is preserved until the rupture of the capsule by mechanical or other force. Preservation of the flavor within the capsule assures that upon release of the flavor it is as consistently strong as when it was first encapsulated. “Flavor,” “fragrance,” “aroma,” and like terms are used interchangeably herein to indicate any substance that is capable of causing an olfactory sensation.  
           [0005]    A multitude of processes exists for manufacturing microcapsules. A variety of techniques can be utilized to produce microcapsules of varying sizes, differing resistances to rupture and alternative capsule compositions and capsule constituents. Several different encapsulation processes are disclosed in U.S. Pat. Nos. 3,516,846; 3,516,941; 3,778,383; 4,087,376; 4,089,802; 4,100,103 and 4,251,386 and British Patent Specification Nos. 1,156,725; 2,041,319 and 2,048,206. Common shell formations include the polymerization reaction of urea and formaldehyde and the polycondensation of methylated urea and aldehydes.  
           [0006]    One manner of flavor-releasing package is disclosed in U.S. Pat. No. 4,717,017, which teaches a cigarette pack with a receptacle for containing a fragrance to be released upon initial opening by the consumer. The release points are disclosed to be along the tear strip portion of the overwrap film. When the tear tape is pulled to slit the overwrap, it also ruptures the receptacle, releasing a pleasant aroma to the consumer.  
           [0007]    U.S. Pat. No. 4,720,423 teaches the use of microcapsules containing therein a fragrance in a multilayer adhesive strip. Separation of the adhered multilayers ruptures the microcapsules, releasing the fragrance. The multilayer adhesive strip is utilized as a tear strip for a package overwrap.  
         SUMMARY OF THE INVENTION  
         [0008]    The object of the present invention is to provide a cigarette flip open box or other package that releases a pleasing aroma to the consumer upon opening.  
           [0009]    It is a further object of the invention that the aroma is preserved against degradation until it is released upon opening of the box.  
           [0010]    The objects of the invention are achieved by incorporating flavorants into microcapsules or similar flavor encapsulating materials. The encapsulated flavorants are adhered to the inside of the frame of a flip open box package so that the flavorant is released upon opening of the package top. Placement of the encapsulated flavorants is determined by consideration of the greatest points of frictional contact between box components and areas with the least direct consumer contact. The flavorant is released through frictional contact of the encapsulating materials on the box top with other structural elements of the box.  
           [0011]    All of the above outlined objectives are to be understood as exemplary only and many more objectives of the invention may be gleaned from the disclosure herein. Therefore, no limiting interpretation of the objectives noted are to be understood without further reading of the entire specification and drawings included herewith.  
       
    
    
     BRIEF DESCRIPTION OF THE DRAWINGS  
       [0012]    [0012]FIG. 1 is a top view of a blank cigarette flip open box frame;  
         [0013]    [0013]FIG. 2 is a perspective view of a closed flip open cigarette box in its assembled form;  
         [0014]    [0014]FIG. 3 is a top perspective view of an open flip open cigarette box in its assembled form with hatching indicating areas printed with microencapsulated flavors on the inside of the lid;  
         [0015]    [0015]FIG. 4 is a right side perspective view of a partially open flip open cigarette box in its assembled form with hatching indicating areas which may be printed with microencapsulated flavors on the inside of the lid; and,  
         [0016]    [0016]FIG. 5 is a left side perspective view of a partially open flip open cigarette box in its assembled form with hatching indicating areas printed with microencapsulated flavors on the inside of the lid. 
     
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT  
       [0017]    A conventional blank cigarette flip open box outer frame  10  is shown in FIG. 1. The shaded areas on the blank show one possible option for regions printed with microcapsules. Referring to FIG. 1, areas which may be printed with the aroma-containing microcapsules in the exemplary embodiment of the present invention may be the lid inside right side wall flap  11 , the lid inside top wall right flap  12 , the bottom half of the lid inside front wall  13 , the lid inside top wall left flap  14 , the lid inside left side wall flap  15 , and the lid inside back wall  16 . As depicted therein, the flip open box  10  is substantially cuboidal in shape but many differing shapes may be utilized.  
         [0018]    When folded, the microcapsule-printed surfaces may constitute a majority of the inner surface of lid  27 . In contrast, it is beneficial that direct consumer contact with the microcapsule-printed surfaces is kept to a minimum. FIG. 2 shows a completely assembled single frame carton package with lid  27  closed. No microcapsule-printed surfaces are exposed when the package lid  27  is closed. Standard gravure or screen printing processes may be utilized to apply the microcapsules to the interior package blanks.  
         [0019]    Areas chosen for printing are those in which frictional contact occurs between box components or box components and product upon opening and areas where consumer contact is least likely to occur. This may occur through the use of either single frame cartons as discussed above and shown in FIG. 1, or with cartons having an inner frame member as is shown in FIGS. 3, 4 and  5 . For example, FIGS. 3, 4 and  5  illustrate a completely assembled flip open box with inner  21  and outer frames  22  joined and lid  27  opened. Inner frame fins  23  and  24  frictionally contact the microcapsules which may be printed on the lid left and right inner side walls  25  and  26 . When the lid top  27  is opened, the microcapsules are ruptured releasing the contained aroma to the consumer. Similarly, inner frame ridges  28  and  29  also frictionally contact lid left and right inner side walls  25  and  26  and the inner front wall  13  when the lid is opened, rupturing other microcapsules and releasing more aroma to the consumer. In like manner, the inner frame side walls  32  and  33  also make frictional contact with lid left and right inner side walls  25  and  26 , releasing encapsulated aroma to the consumer. Depending on product arrangement, the product or its covering may also frictionally contact one or more microcapsule coated inner surfaces of lid  27 . Of course, the actual placement of the micro capsule coated inner surface on the flip top can vary quite extensively depending on the aromatic effect desired, strength of the flavorant encapsulated, extent of frictional engagement between the flip top and the lower body member, or other factors. Additionally, as can be seen from the figures, inner front side wall  13  of the flip top may actually contact the cigarettes  52  when it is opened thereby causing frictional engagement and release of flavorant.  
         [0020]    An additional aspect of the designs depicted in FIGS.  1 - 5  is the usage on cigarette flip top boxes having either no inner frame  21 , as depicted in FIG. 1 and  2 , and that of FIGS.  3 - 5  wherein inner frame  21  extends upward from the top edge of the lower body outer frame member  22 . As can be understood from the Figures, in FIGS.  1 - 2 , the flip top  27  will contact upper edges  40 - 42  of the lower section of the package upon closing of the flip top. Thus, flavorant may be added as shown, on areas  11 - 16 . Primarily, however, edges on panels  11  and  15  will contact and potentially frictionally engage edges  40  and  42 . Alternatively, in FIGS.  3 - 5  and inner frame type flip open carton is utilized wherein first and second inner frame side panels  32  and  33  are provided with inner frame front panel  34 . However, multiple variations are possible with many types of packaging designs and no particular embodiment set forth herein for exemplary purposes only should be read as limiting. The teachings of the present description is felt to cover a significant number of variants for enabling release of flavorants upon use or opening of the package  10 .  
         [0021]    Microcapsules containing an aroma of choice are manufactured and can be obtained commercially from companies such as Arcade, Inc., Chattanooga, Tenn. Examples of potential aromas for encapsulation include peppermint and roasted/toasted aromas. However, almost any flavor oil may be encapsulated so long as it meets certain basic requirements of the technology, such as having hydrophobic qualities. A solution of polyoxymethylene urea polymer may be used to coat the flavor oils and produce the microcapsules after polymerization. The microcapsules may range in size from about 10 to about 40 micrometers in diameter.  
         [0022]    The microcapsules may be obtained as a wet cake that can be combined with water to produce an “ink” slurry. Solvents are not utilized in combination with the cake as they may dissolve the polymer shell surrounding the microencapsulated aroma. A variety of concentrations will result in a usable ink slurry depending on the printing conditions and processes. For example, a 50% to 60% concentration of wet cake produces ink of consistency usable for gravure printing systems. In gravure printing press runs, 40 kilograms of ink at a 50% dilution concentration may yield enough ink to print approximately one million flip open boxes. Screen printing processes may also be used with microencapsulation inks.  
         [0023]    Thus, a flip open box package is provided which is strategically coated with microencapsulated aroma oil ink so that frictional contact between a coated surface and other surfaces of the package occurs upon opening by the consumer. Frictional contact ruptures the microcapsules releasing a fragrant aroma to the consumer. One skilled in the art will appreciate that the present invention can be practiced by other than the described embodiments, which are presented for purposes of illustration and not limitation, and the present invention is limited only by the claims which follow.  
         [0024]    The forgoing detailed description is primarily given for clearness of understanding and no unnecessary limitations are to be understood therefrom for modifications will become obvious to those skilled in the art upon reading this disclosure and may be made without the parting from the spirit of the invention or the scope of the appending claims.