Clamshell container with anti-bind feature

Patent metadata

Field	Value
Publication number	US-9938036-B2
Application number	US-201715401885-A
Country	US
Kind code	B2
Filing date	Jan 9, 2017
Priority date	Mar 14, 2013
Publication date	Apr 10, 2018
Grant date	Apr 10, 2018

Abstract

A clamshell container having an anti-bind feature is provided. The container is comprised of a tray and a cover, each having a first panel and rear panel foldably connected along a rear fold line. One or both of the rear fold lines may be interrupted by a cut suitable for allowing the rear panels to flex or bow when the cover is hingedly rotated relative to the tray. A rear cut may be provided generally coextensive with each of the fold lines. The cuts can have an arcuate shape and may be convexly curved toward an interior of the container.

First claim

What is claimed is:

1. A clamshell container formed from a single blank of material, said container comprising:
a tray including a first tray panel and a rear tray panel extending from said first tray panel, said first tray panel and said rear tray panel being foldably connected along a rear tray fold line;
a cover including a first cover panel and a rear cover panel extending from said first cover panel, said first cover panel and said rear cover panel being foldably connected along a rear cover fold line; and
a rear cut defined as at least one of a slit, a slot, an incision, an opening and an aperture through at least one of said first tray panel, said rear tray panel, said first cover panel, said rear cover panel, said rear tray fold line, and said rear cover fold line;
wherein said rear cut interrupts at least one of said rear tray fold line and said rear cover fold line at an intermediate position of said rear tray fold line or said rear cover fold line;
and
wherein when said cover is rotated relative to said tray, at least one of said rear tray panel and said rear cover panel includes an inwardly displaced portion.

2. The clamshell container of claim 1 , wherein said rear cut is proximate a mid-section of at least one of said rear tray fold line and said rear cover fold line.

3. The clamshell container of claim 1 , wherein said rear cut intersects at least one of said rear tray fold line and said rear cover fold line.

4. The clamshell container of claim 1 , wherein said rear cut is generally coextensive with at least one of said rear tray fold line and said rear cover fold line.

5. The clamshell container of claim 1 , wherein said rear tray fold line is interrupted by a first said rear cut and said rear cover fold line is interrupted by a second said rear cut.

6. The clamshell container of claim 1 , wherein said rear tray panel and said rear cover panel are hingedly connected to one another at a hinge line.

7. The clamshell container of claim 1 , wherein said rear cut is adapted for allowing at least a portion of at least one of said rear tray panel and said rear cover panel to flex as said cover is moved relative to said tray.

8. The clamshell container of claim 1 further comprising:
a front tray panel extending from said first tray panel, said first tray panel and said front tray panel being foldably connected along a front tray fold line;
a front cover panel extending from said first cover panel, said first cover panel and said front cover panel being foldably connected along a front cover fold line; and
a front cut generally coextensive with at least one of said front tray fold line and said front cover fold line.

9. The clamshell container of claim 8 , wherein said front cut is at least partially laterally offset from said rear cut.

10. The clamshell container of claim 9 , wherein at least one of said front tray fold line and said front cover fold line is generally coextensive with two said front cuts, said front cuts each being proximate opposing ends of at least one of said front tray fold line and said front cover fold line.

11. A clamshell container formed from a single blank of material, said container comprising:
a tray including a first tray panel and a rear tray panel extending from said first tray panel, said first tray panel and said rear tray panel being foldably connected along a rear tray fold line; and
a cover including a first cover panel and a rear cover panel extending from said first cover panel, said first cover panel and said rear cover panel being foldably connected along a rear cover fold line;
a first rear cut being generally coextensive with and interrupting a mid-section of said rear tray fold line, said first rear cut defined through at least one of said first tray panel and said rear tray panel forming an opening between said first tray panel and said rear tray panel; and
a second rear cut being generally coextensive with and interrupting a mid-section of said rear cover fold line, said second rear cut defined through at least one of said first cover panel said rear cover panel forming an opening between said first cover panel and said rear cover panel;
wherein each of said first rear cut and said second rear cut are defined as at least one of a slit, a slot, an incision, an opening and an aperture; and
wherein when said cover is rotated relative to said tray, at least a portion of said rear tray panel is displaced inwardly, and at least a portion of said rear cover panel is displaced inwardly.

12. A foldable blank for forming a clamshell container, said blank comprising:
a tray portion including a first tray panel and a rear tray panel extending from said first tray panel, said first tray panel and said rear tray panel being foldably connected along a rear tray fold line;
a cover portion including a first cover panel and a rear cover panel extending from said first cover panel, said first cover panel and said rear cover panel being foldably connected along a rear cover fold line; and
a rear cut interrupting at least one of said rear tray fold line and said rear cover fold line at an intermediate position of said rear tray fold line or said rear cover fold line, wherein said rear cut is arcuate, and wherein said rear cut is defined as at least one of a slit, a slot, an incision, an opening and an aperture through said at least one of said rear tray fold line and said rear cover fold line;
wherein upon formation of said container, when said cover portion is rotated relative to said tray portion, at least a portion of least one of said rear tray panel and said rear cover panel is displaced inwardly.

13. The blank of claim 12 , wherein said rear cut is proximate a mid-section of at least one of said rear tray fold line and said rear cover fold line.

14. The blank of claim 12 , wherein said rear cut is generally coextensive with at least one of said rear tray fold line and said rear cover fold line.

15. The blank of claim 12 , wherein a center portion of at least one of said rear tray panel and said rear cover panel bows inwardly as said cover portion is hingedly rotated relative to said tray portion upon formation of said container.

16. The blank of claim 12 further comprising:
a front tray panel extending from said first tray panel, said first tray panel and said front tray panel being foldably connected along a front tray fold line;
a front cover panel extending from said first cover panel, said first cover panel and said front cover panel being foldably connected along a front cover fold line; and
a front cut generally coextensive with at least one of said front tray fold line and said front cover fold line.

Assignees

• Huhtamaki Inc

Inventors

• Robertson Ronald D

Classifications

• B65D5/667

  Lids in the form of an inverted tray · CPC title

• B65D5/0085 Primary

  the container body comprising two mating compartments hinged together (B65D77/006 takes precedence) · CPC title

• B65D5/18

  by folding a single blank to U-shape to form the base of the container and opposite sides of the body portion, the remaining sides being formed primarily by extensions of one or more of these opposite sides, e.g. flaps hinged thereto (specially constructed to allow collapsing and re-erecting without disengagement of side or bottom connections B65D5/36) · CPC title

• B65D5/4266

  Folding lines, score lines, crease lines · CPC title

• B65D5/48014 Primary

  formed by folding extensions hinged to the side edges of a tubular body (B65D5/48004 takes precedence; partition separated by erecting the body B65D5/48048) · CPC title