Methods and apparatus for manufacture of a reclosable plastic carton
First Claim
Patent Images
1. A carton formed from a unitary blank, the carton comprising:
- a generally rectangular bottom with a pair of major bottom flaps and a pair of minor bottom flaps where the bottom flaps are folded to form a substantially closed bottom;
a plurality of upstanding side panels, including a pair of major side panels, a pair of minor side panels, and a secondary side panel, where the side panels are each folded generally perpendicular to the bottom, the major and minor side panels are attached to the bottom at a lower end thereof and the secondary side panel is attached to one of the major side panels or one of the minor side panels; and
an opening defined by upper ends of the major side panels and the minor side panels opposite the bottom that is generally non-rectangular and having a rim around a peripheral edge thereof, the rim having a width greater than the thickness of the side panels.
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Abstract
A carton formed from a unitary blank for storing food within and methods of manufacture of the carton thereform, are disclosed herein. The carton comprises a generally rectangular bottom having a pair of major bottom flaps and a pair of minor bottom flaps that are folded to form a substantially closed bottom, and a pair of major side panels, a pair of minor side panels, and a secondary side panel that are folded perpendicular to the bottom. An opening is defined by the upper ends of the major side panels and the minor side panels opposite the bottom and is generally non-rectangular.
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Citations
16 Claims
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1. A carton formed from a unitary blank, the carton comprising:
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a generally rectangular bottom with a pair of major bottom flaps and a pair of minor bottom flaps where the bottom flaps are folded to form a substantially closed bottom;
a plurality of upstanding side panels, including a pair of major side panels, a pair of minor side panels, and a secondary side panel, where the side panels are each folded generally perpendicular to the bottom, the major and minor side panels are attached to the bottom at a lower end thereof and the secondary side panel is attached to one of the major side panels or one of the minor side panels; and
an opening defined by upper ends of the major side panels and the minor side panels opposite the bottom that is generally non-rectangular and having a rim around a peripheral edge thereof, the rim having a width greater than the thickness of the side panels. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A method for forming a carton from a unitary blank in a collapsed configuration, the blank having a pair of major side panels and a pair of minor side panels adjacent one another and a pair of major bottom flaps and a pair of minor bottom flaps attached to the side panels at a lower end thereof, and a secondary side panel attached lengthwise to an outer edge of one of the major or minor side panels, the collapsed configuration having each of the major side panels generally coplanar with one of the minor side panels and the bottom flaps each coplanar with the attached major or minor side panel, the method comprising the steps of:
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shifting the blank from the collapsed configuration to an upright configuration where the major and minor side panels are substantially normal to attached major and minor side panels;
folding each of the bottom flaps into configurations substantially normal to the attached side panels;
applying a heat source to the bottom flaps to form seals therebetween; and
applying a heat source to an opening defined by upper edges of the major and minor side panels opposite the bottom flaps to shape the upper edges into a non-rectangular periphery and to form a curved rim about the upper edges. - View Dependent Claims (8, 9, 10, 11, 12, 13, 14, 15, 16)
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Specification