Carton blank and method for forming the carton blank
First Claim
Patent Images
1. A carton blank for forming a closed carton by folding and sealing together portions of the carton blank comprising:
- an outer layer of a relatively rigid material having an outer surface and an inner surface;
an intermediate layer of a first plastic material secured to said inner surface of said outer layer by a first bond of a predetermined first strength;
said intermediate layer having an inner surface;
an inner layer of a second plastic material secured to said inner surface of said intermediate layer by a second bond of a second strength that is less than said first strength so that when a sufficient force is applied to at least a portion of said inner layer, said at least a portion of said inner layer will separate from the corresponding at least a portion of said intermediate layer but said corresponding at least a portion of said intermediate layer will not separate from said outer layer.
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Abstract
A gable top for a carton formed from a carton blank having an outer layer bonded to an intermediate layer by a first strength and an inner layer bonded to the intermediate layer by a second strength less than by a first strength and wherein the intermediate layer is of an esthetically pleasing color and formed into a gable top by sealing together facing portions of the inner layer so that when the gable top is separated to form a pour spout the inner surface of the pour spout will be aesthetically pleasing.
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Citations
19 Claims
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1. A carton blank for forming a closed carton by folding and sealing together portions of the carton blank comprising:
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an outer layer of a relatively rigid material having an outer surface and an inner surface; an intermediate layer of a first plastic material secured to said inner surface of said outer layer by a first bond of a predetermined first strength; said intermediate layer having an inner surface; an inner layer of a second plastic material secured to said inner surface of said intermediate layer by a second bond of a second strength that is less than said first strength so that when a sufficient force is applied to at least a portion of said inner layer, said at least a portion of said inner layer will separate from the corresponding at least a portion of said intermediate layer but said corresponding at least a portion of said intermediate layer will not separate from said outer layer. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method for forming a closed carton having a partially openable gable top which may be opened to form a spout while retaining an anesthetic appearance to the inner surface of the opened spout comprising:
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forming a carton blank having an outer layer of a relatively rigid material, an intermediate layer of a first plastic material and an inner layer of a second plastic material; bonding together said outer layer and said intermediate layer with a first bond of a predetermined first strength; bonding together said intermediate layer and said inner layer with a second bond of a second strength which second strength is less than said first strength; forming fold lines in said carton blank; folding said carton blank to form a carton having a gable top so that portions of said inner layer forming said gable top are in a face to face relationship; applying heat to said portions of said inner layer to bond said portions of said inner layer together with a third bond of a third strength that is greater than said second strength but less than said first strength. - View Dependent Claims (12, 13, 14, 15)
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16. A carton having a gable top so that sealed together portions of the gable top may be separated to form a pour spout without impairing the aesthetic appearance of the exposed inner surface of the pour spout comprising:
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a carton having a gable top formed from a plurality of superposed layers of materials having at least portions thereof sealed together to form an effective seal; said at least sealed together portions comprising; an outer layer of a relatively rigid material having at least a first section and a second section integral with said first section and joined thereto by a fold line and said outer layer having an inner surface; an intermediate layer of a first plastic material secured to said inner surface of said outer layer and having a first section and a second section integral with said first section and joined thereto by a fold line and said intermediate layer having an inner surface; said intermediate layer being secured to said outer layer by a first bond of a predetermined first strength; an inner layer of a second plastic material secured to said inner surface of said intermediate layer and having a first section and a second section integral with said first section and joined thereto by a fold line and said inner layer having an inner surface; said inner layer being secured to said intermediate layer by a second bond having a second strength less than said first strength; said fold lines of said outer, intermediate and inner layers being in a superposed relationship; said outer, intermediate and inner layers being folded around said fold lines so that at least portions of said inner surface of said inner layer are in a face to face relationship; and said at least portions of said inner surface of said inner layer being secured together by a third bond having a third strength that is less than said first strength but more than said second strength. - View Dependent Claims (17, 18, 19)
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Specification