Buckle-proof clamshell container
First Claim
1. In a clamshell type container having a top portion, a bottom portion, two side portions and a back panel portion separating said top portion from said bottom portion along a single hinge line having a midpoint halfway between said two side portions, said back panel portion having a central region which extends from the midpoint of said single hinge line about one-half of the distance from said midpoint to said side portion, the improvement comprising:
- intersecting, non-coextensive diagonal incisions formed in said back panel in said central region, both above and below, and for less than the entire length of, said hinge line, said diagonal incisions being so formed that any two thereof will touch one another at a point that lies approximately on said single hinge line, whereby permanent buckling of the back panel is avoided when said top portion is pivoted about said hinge line to open said container.
1 Assignment
0 Petitions
Accused Products
Abstract
Disclosed are various diagonal incisions adjacent the hinge line of a clamshell container. These diagonal incisions allow opening of the clamshell container without permanent buckling. Also disclosed are ribs formed above, below, and parallel to, the hinge line of a clamshell container.
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Citations
19 Claims
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1. In a clamshell type container having a top portion, a bottom portion, two side portions and a back panel portion separating said top portion from said bottom portion along a single hinge line having a midpoint halfway between said two side portions, said back panel portion having a central region which extends from the midpoint of said single hinge line about one-half of the distance from said midpoint to said side portion, the improvement comprising:
intersecting, non-coextensive diagonal incisions formed in said back panel in said central region, both above and below, and for less than the entire length of, said hinge line, said diagonal incisions being so formed that any two thereof will touch one another at a point that lies approximately on said single hinge line, whereby permanent buckling of the back panel is avoided when said top portion is pivoted about said hinge line to open said container. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
Specification