Clamshell container with anti-bind feature

• US 9,540,135 B2
• Filed: 03/14/2014
• Issued: 01/10/2017
• Est. Priority Date: 03/14/2013
• Status: Active Grant

• Current Assignee: Huhtamaki Incorporated (Huhtamaki Oyj)
• Original Assignee: Huhtamaki Incorporated (Huhtamaki Oyj)
• Inventors: Robertson, Ronald D.
• Primary Examiner(s): DEMEREE, CHRISTOPHER R
• Application Number:
  US14/213,681
• Publication Number:
  US 20140263599A1
• Time in Patent Office: 1,033 Days
• Field of Search: 229/920, 229/902, 229/931, 229/930, 229/146, 229/114
• US Class Current: 1/1
• CPC Class Codes: B65D 5/0085 the container body comprising two mating compartments hinged together B65D77/006 takes precedence
• CPC Class Codes: B65D 5/18 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 B65D5/36 takes precedence
• CPC Class Codes: B65D 5/4266 Folding lines, score lines, crease lines
• CPC Class Codes: B65D 5/48014 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 Class Codes: B65D 5/667 Lids in the form of an inverted tray
• CPC Class Codes: B65D 5/6685 formed by extensions hinged to the upper edge of a container body formed by erecting a blank to U-shape

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.

Claims

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;

a first rear cut being generally coextensive with and interrupting a mid-section of said rear tray fold line, said first rear cut defined in 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 in 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 said first rear cut allows at least a portion of said rear tray panel to bow inwardly, and wherein said second rear cut allows at least a portion of said rear cover panel to bow inwardly;

wherein when said cover is rotated relative to said tray, said rear tray panel and said rear cover panel each include an inwardly displaced middle portion.