Expandable carton and blank for forming same
First Claim
Patent Images
1. An expandable carton, comprising:
- a top panel having first and second side edges and first and second end edges;
a bottom panel having first and second side edges and first and second end edges;
self-locking expandable means for coupling said first and second side edges and said first end edge of said top panel to said first and second side edges and said first end edge of bottom panel, respectively;
a bottom closure flap hingedly coupled to said bottom panel at said second end edge thereof along a fold line; and
a top closure flap hingedly coupled to said top panel at said second end edge thereof along a fold line.
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Abstract
An expandable carton and a blank for forming same has top and bottom panels which are coupled by a self-locking expanding arrangement along three respective side edges of the top and bottom panels. At the fourth side edges of the top and bottom panels, closure flaps are hingedly coupled to close and lock the carton in its expanded or assembled configuration. This permits the carton to be shipped and stored in essentially flat, collapsed configuration, and then easily assembled and closed by simple manual operations without gluing. The carton may be opened by a tear strip arrangement to gain access to the carton interior.
55 Citations
11 Claims
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1. An expandable carton, comprising:
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a top panel having first and second side edges and first and second end edges; a bottom panel having first and second side edges and first and second end edges; self-locking expandable means for coupling said first and second side edges and said first end edge of said top panel to said first and second side edges and said first end edge of bottom panel, respectively; a bottom closure flap hingedly coupled to said bottom panel at said second end edge thereof along a fold line; and a top closure flap hingedly coupled to said top panel at said second end edge thereof along a fold line. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A planar, unitary blank for forming an expandable carton, comprising:
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a top panel having first and second side edges and first and second end edges; a bottom panel having first and second side edges and first and second end edges; a bottom closure flap hingedly coupled to said bottom panel at said second end edge thereof along a fold line; a top closure flap hingedly coupled to said top panel at said second end edge thereof along a fold line; first and second trapezoidal top side panels hingedly coupled to said top panel at said first and second side edges thereof, respectively, along fold lines; first and second trapezoidal bottom side panels hingedly coupled to said bottom panel at said first and second side edges thereof, respectively, along fold lines; first and second glue flaps hingedly coupled to one of said first and second side panels, respectively, at edges thereof remote from one of said top and bottom panels along fold lines; top and bottom end panels hingedly coupled to said first end edges of said top and bottom panels, respectively, along fold lines, said top and bottom end panels hingedly coupled at edges remote from said top and bottom panels, respectively, along a fold line; first and second triangular top corner panels hingedly coupled to said top end panel at opposite side edges thereof along fold lines and to said first and second top side panels, respectively, at side edges thereof along fold lines; first and second triangular bottom corner panels hingedly coupled to said bottom end panel at opposite side edges thereof along fold lines and to said first and second bottom side panels, respectively, at side edges thereof along fold lines, said first and second top corner panels being hingedly coupled to said first and second bottom corner panels, respectively, along fold lines; third and fourth triangular top corner panels hingedly coupled to said top closure flap at opposite side edges thereof along fold lines and to said first and second top side panels, respectively, at side edges thereof remote from said first and second top corner panels along fold lines; and third and fourth triangular bottom corner panels hingedly coupled to said bottom closure flap at opposite side edges thereof along fold lines and to said first and second bottom side panels, respectively, at side edges thereof remote from said first and second bottom corner panels along fold lines. - View Dependent Claims (11)
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Specification