Receptacles – Receptacle having flexible – removable inner liner – Means for venting air trapped between the liner and its...
Patent
1994-05-09
1996-01-16
Pollard, Steven M.
Receptacles
Receptacle having flexible, removable inner liner
Means for venting air trapped between the liner and its...
220640, B65D 568
Patent
active
054840775
DESCRIPTION:
BRIEF SUMMARY
The present invention relates to a system for sticking a small frame with integral lid made of plastic material to a bag and to an external container, into which the bag itself is inserted so as to form as a whole a boxed packaging which is hermetically sealed during the use of the packaging.
Packagings of this type are already known, which are formed by an internal bag of square shape containing for example, roast and ground coffee packed under vacuum, by an external container, usually a box made of card, and by a small frame with integral lid made of plastic material which is joined both to the internal bag and to the external container.
Such packagings generally have an unsatisfactory join both between the lower surface of the flange of small frame and the internal bag, and between the upper edge of the external container and the small frame itself. This leads to imperfect airtightness which compromises the preservation of the aroma of the product, in particular in the case of coffee, once the user has opened the wall of the bag appearing in the opening delimited by the flange, notwithstanding the good hermetic sealing existing between the lid and the upper rim of the small frame, which is ensured by a gasket.
The aim of the present invention is to equip the small frame with integral lid made of plastic material with a sticking system which has the following advantages in relation to the other versions already on the market: the surface of the internal envelope, represented in this case by a bag under vacuum; and represented for example by a cardboard envelope. according to the invention render the packaging more hermetic and more resistant to the conditions of stress which are often brought about during transport and use in the domestic environment. packaging for roast and ground coffee, packaged under vacuum, although the same is also applicable to different categories of product such as, for example, peanuts, biscuits, cocoa or the like or detergents packaged in types of packaging having a boxed envelope. made of plastic material, represented for example by a dispensing member, to a container.
According to the invention, the sticking system is based on the combination of one or more of the following characteristics: plastic material, in which the edges of the external container are inserted, has branched sticking fins. These branched fins guarantee a more extensive three-dimensional and multidirectional contact with the glue, through the sticking planes, by means of multiple orientation in space. As a result of the greater surface area of the specific zones of the small frame which are exposed to the glue and of the appropriate orientation of the sticking fins, the adhesion force, when the external container is stuck to the small frame, is greater. material is corrugated instead of smooth. This shaped finish of the sticking flange renders its surface non-uniform and therefore the layer of glue which connects the small frame to the bag is distributed three-dimensionally. This increases the surface area of the small frame available for adhesion, divides the stress of detachment into components of elongation and shear and thus improves the adhesion between the small frame and the sticking means. Moreover, the incorporation of lines of continuity along the entire periphery of the shaped part renders the sticking more airtight by means of the barriers presented to the exchange of gases from one side to the opposite side of the layer of glue. to be connected to the flange has a non-uniform finish of the surface instead of a flat smooth finish. This non-uniform finish of the upper edge of the container also permits the making of three-dimensional and multidirectional contact with the areas of glue, increasing in this manner the surface area of the container available for adhesion, and distributing the stress into components of elongation and shear.
Packagings with a boxed envelope are already known, such packagings involving the use of a lid made of plastic material stuck both to the internal bag and to the
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Albanesi Mario
Bonifaci Luigi
Kock Ronald W.
Pollard Steven M.
The Procter & Gamble & Company
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