Pre-glued tapered tray with gussets and flanges

• US 4,951,868 A
• Filed: 05/19/1989
• Issued: 08/28/1990
• Est. Priority Date: 05/19/1989
• Status: Expired due to Fees

• Current Assignee: Waldorf Corp
• Original Assignee: Waldorf Corp
• Inventors: Mode, Duane R.
• Primary Examiner(s): ELKINS, GARY E
• Application Number:
  US07/354,631
• Time in Patent Office: 466 Days
• Field of Search: 229/3.1, 229/112, 229/125.35, 229/160, 229/170, 229/171, 229/182, 229/186, 229/905, 229/137, 229/138
• US Class Current: 229/112
• 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 5/243 the container body comprising a continuous rim or flange
• CPC Class Codes: B65D 5/5455 the lines of weakness being provided in a closure hinged to an edge of the container body
• CPC Class Codes: Y10S 229/905 Frozen food

Abstract

A container has a base panel of generally rectangular shape bounded by four edges. Two generally rectangular, opposed side panels are connected to the base. Each side panel is connected at one of its edges to one of two opposed edges of the base panel and projects upward therefrom. Two generally rectangular, opposed end panels are connected to the remaining opposed edges of the base panel and project upward therefrom. Four folded gussets are connected between the adjacent side panels and end panels, one at each of the corners of the base panel. A generally rectangular top panel lies substantially parallel to the base panel and has each of two of its opposed edges connected to one edge of each of the side panels. Each of the two remaining edges of the top panel forms one outer layer of a pair of substantially sealed, gathered end closures of the container. The other outer layer of each end closure is formed with a lip flap of one of the end panels, with at least one thickness of each gusset being sandwiched between the top panel and the end panel lip flap in each corner of each end closure.

Claims

1. A structure for forming a tray container comprising:

a base panel and a top panel, each being generally rectangular and having four corners, said base panel and top panel lying parallel and opposed to each other;

a pair of generally rectangular, opposed side panels connecting opposed edges of the base and top panels at fold lines to form a collapsible tube of generally rectangular cross-section with a pair of open ends when erected;

a pair of generally rectangular, opposed end panels, one such end panel being connected at a fold line to an edge of said base panel at each of the open ends of said tube;

a pair of gussets connected to each such end panel at fold lines, each of said pair of gussets also being connected at a fold line to the side panel adjacent said end panel to form a link between each said end panel and the adjacent side panel, each said gusset further having a fold line extending away from each corner of said base panel; and

a lip flap connected to each said end panel at a fold line that is opposite the fold line connecting said end panel to said base panel, each said lip flap and at least one thickness of each gusset being gatherable upon folding of each end panel at its base panel fold line toward said top panel to form two end closures with outer and inner layers, each end closure extending between two corners of said top panel and having a top panel edge and the adjacent lip flap as its outer layers, with at least one thickness of each gusset being sandwiched between said top panel and said end panel lip flap as an inner layer at each corner of said top panel.

2. The structure of claim 1 wherein the side panels and end panels are integrally formed with said base panel.

3. The structure of claim 2 wherein the four gussets are integrally formed with said side panels, end panels and base panel.

4. The structure of claim 3 wherein the top panel is integrally formed with said gussets, side panels, end panels and base panel.

5. The structure of claim 4 wherein the two opposed end walls project upward with an included angle between said base panel and each of said two opposed end walls that is greater than ninety degrees.

6. The structure of claim 1 wherein the structure is made from paperboard that has polyester coating on at least one side.

7. The structure of claim 1 wherein said top panel is generally planar and each end closure is substantially in the plane of the top panel.

8. The structure of claim 1 wherein two thicknesses of each gusset are sandwiched between said top panel and said end panel lip flap in each end closure.

9. The structure of claim 1 wherein the structure is made from paperboard covered with a polyester coating on at least one side and each end closure is formed by heat and pressure applied to the end closure.

10. The structure of claim 9 wherein the structure is made from paperboard covered with a polyester coating on both sides.