Collapsible tray

• US 4,340,169 A
• Filed: 03/04/1981
• Issued: 07/20/1982
• Est. Priority Date: 03/04/1981
• Status: Expired due to Fees

• Current Assignee: Waldorf Corp
• Original Assignee: Champion International Corporation (International Paper Company)
• Inventors: Webinger, George P.
• Primary Examiner(s): Ross, Herbert F.
• Application Number:
  US06/240,572
• Time in Patent Office: 503 Days
• Field of Search: 229/31 R, 229/41 B, 229/16 R
• US Class Current: 229/101
• CPC Class Codes: B65D 5/0005 of variable capacity
• CPC Class Codes: B65D 5/2076 Cooperating flaps glued together
• CPC Class Codes: B65D 5/241 and the gussets folds connected to the inside of the container body B65D5/247 and B65D5/248 take 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

Abstract

A paperboard tray and a blank therefor is disclosed which is collapsible to form a carton. More specifically, the subject tray may be collapsed and sealed to hold a product and may then be subsequently opened and reformed into a tray for use in serving or cooking. A pair of handle flanges are provided defining carrying handles when the tray is opened and for structurally rigidifying the tray and preventing its inadvertent collapse.

Claims

1. A collapsible tray comprising:

a generally rectangular bottom wall having a rectangular center panel and first and second rectangular bottom panels hingedly connected to opposed side edges of said center panel;

first and second upstanding end panels hingedly connected to the side edges of said bottom panels opposed to the hinged connections to said center panel;

first and second upstanding side panels hingedly connected to the remaining opposed side edges of said bottom wall, with the adjacent side edges of said end panels and said side panels being respectively hingedly connected to define a continuous side panel structure, each said side panel having a center section disposed co-extensive with and hingedly connected to the adjacent side edge of said center panel and with each said side panel further including first and second side sections hingedly connected to the opposed side edges of the associated center section and disposed co-extensive with and hingedly connected to the adjacent side edges of the first and second bottom panels, each said side section of said side panels including a diagonal fold line extending from the intersection between said side section and said center panel of said bottom wall; and

a pair of handle flanges, respectively hingedly connected to the opposed side edges of said side panels, each said handle flange capable of being rotated at an angle relative to said side panel and extending away from the interior of said tray, said handle flanges thereby providing a means for carrying said tray and for rigidifying said tray, said tray being collapsible into an enclosed carton by upwardly folding said bottom panels of said bottom wall relative to said center panel thereof such that said bottom panels define side walls of said enclosed carton and said end panels cooperate to define a continuous top wall, and with each said side section being folded inwardly about said diagonal fold line such that said side sections and said center section of each said side panel overlap to define a triple ply end wall structure, whereby an enclosed carton is defined.

2. A collapsible tray as recited in claim 1 wherein each said handle flange includes a center portion disposed coextensive with and hingedly connected to the associated side edge of said center section of said side panel, and with each said handle flange further including first and second side portions respectively hingedly connected to the opposed side edges of said center portion of said handle flange, and with each said side portion being hingedly connected to and extending along a portion of the side edge of the adjacent side section of said side portion.

3. A collapsible tray as recited in claim 2 wherein said side portions of each said handle flange extend along the side edge of the adjacent side section of said side panel to a point coincident with the opposed end of said diagonal fold line thereof.

4. A collapsible tray as recited in claim 2 wherein each of said handle flanges further includes a glue flap hingedly connected to the remaining side edge of said center portion whereby when said tray is collapsed into said enclosed carton, said glue flap is connectable to said top wall for maintaining said end wall structure.

5. A collapsible tray as recited in claim 1 wherein one of said end panels further includes a glue flap hingedly connected to the opposed side edge thereof such that when said tray is collapsed into said enclosed carton, said glue flap of said one end panel is connectable to the other end panel to seal said carton.

6. A blank for forming a collapsible tray comprising:

a generally rectangular bottom wall having a rectangular center panel and first and second rectangular bottom panels hingedly connected to opposed side edges of said center panel;

first and second end panels hingedly connected to the side edges of said bottom panels, opposed to the hinged connections to said center panel;

first and second side panels hingedly connected to the remaining opposed side edges of said bottom wall, each said side panel having a center section disposed coextensive with and hingedly connected to the adjacent side edge of said center panel and with each said side panel further including first and second side sections hingedly connected to the opposed side edges of the associated center section and disposed coextensive with and hingedly connected to the adjacent side edges of said first and second bottom panels, each said side section of said side panels including a diagonal fold line extending from the intersection between said side section and said center panel of said bottom wall; and

a pair of handle flanges hingedly connected to the opposed side edges of said side panels.

7. A blank as recited in claim 6 wherein each said handle flange includes a center portion disposed coextensive with and hingedly connected to the associated side edge of said center section of said side panel, and with each said handle flange further including first and second side portions respectively hingedly connected to the opposed side edges of said center portion of said handle flange, each said side portion being hingedly connected to and extending along a portion of the side edge of the adjacent side section of said side panel.

8. A blank as recited in claim 7 wherein each said side portion of said handle flanges extends along the side edge of the adjacent side section of said side panel to a point coincident with the opposed end of said diagonal fold line thereof.

9. A blank as recited in claim 7 wherein each of said handle flanges further includes a glue flap hingedly connected to the remaining side edge of said central portion.

10. A blank as recited in claim 6 wherein one of said end panels further includes a glue flap hingedly connected to the opposed side edge thereof.

11. A blank as recited in claim 6 wherein each said end panel further includes a pair of glue tabs disposed along the side edges thereof hingedly connected along a line colinear with the hinged connections between said bottom wall and said side panels.