Clamshell type carton

• US 4,232,816 A
• Filed: 03/16/1979
• Issued: 11/11/1980
• Est. Priority Date: 03/16/1979
• Status: Expired due to Term

• Current Assignee: Container Corporation of America (WestRock Company)
• Original Assignee: Container Corporation of America (WestRock Company)
• Inventors: Johnson, Fred J., Bell, Richard L.
• Primary Examiner(s): Moorhead, Davis T.
• Application Number:
  US06/021,256
• Time in Patent Office: 606 Days
• Field of Search: 229/33, 229/36, 229/31, 229/34 R
• US Class Current: 229/114
• CPC Class Codes: B65D 5/2047 trapezoidal, e.g. to form a body with diverging side walls B65D5/2033 takes precedence
• CPC Class Codes: B65D 5/28 with extensions of sides permanently secured to adjacent sides, with sides permanently secured together by adhesive strips, or with sides held in place solely by rigidity of material
• CPC Class Codes: B65D 5/667 Lids in the form of an inverted tray
• CPC Class Codes: Y10S 206/831 Detachable coupon

Abstract

A carton has a cover in the shape of a truncated pyramid and a tray of like shape. The cover and the tray each have a wall joined along a common fold line. The side walls of the cover are dimensioned to extend beyond the side walls of the tray so that the edges of the side walls of the tray contact the interior faces of corresponding side walls of the cover, when the cover is closed onto the tray.

Claims

1. A carton formed from a cut and scored blank of paperboard or the like comprising:

(a) a cover of truncated pyramid configuration and a tray of like configuration hingedly joined along a fold line common to said cover and said tray;

(b) said tray and said cover each having;

(i) a central panel of generally rectangular form;

(ii) side, front and rear walls foldably connected to each central panel;

(iii) at least two of said walls positioned opposite each other having the shape of a trapezoid with the minor base thereof connected to its corresponding central panel;

(c) corresponding walls of said tray and said cover having said trapezoidal shape being provided with flaps foldably connected at inclined fold lines at the ends of said walls;

(d) each of said flaps being secured to an adjacent walls;

(e) the side walls of said cover extending beyond the side walls of said tray so that the cover overlies the tray with the free edges of said side walls of said tray being in contact with the interior faces of the corresponding side walls of said cover thereby providing a gap for escape of moisture from the interior of the carton.

2. A container according to claim 1, wherein the rear walls of said cover and tray have a line of weakness extending normal to said fold line common to said rear walls.