Ovenable carton with handles

• US 4,836,438 A
• Filed: 10/11/1988
• Issued: 06/06/1989
• Est. Priority Date: 10/11/1988
• Status: Expired due to Fees

• Current Assignee: Meadwestvaco (WestRock Company)
• Original Assignee: Westvaco Corporation (Meadwestvaco Corporation)
• Inventors: Rigby, William R.
• Primary Examiner(s): NOT, DEFINED
• Assistant Examiner(s): NOT, DEFINED
• Application Number:
  US07/255,866
• Time in Patent Office: 238 Days
• Field of Search: 229/52 B, 206/621, 206/625, 206/631.1
• US Class Current: 229/117.12
• CPC Class Codes: B65D 5/541 the lines of weakness being provided in one or more closure flaps
• CPC Class Codes: B65D 81/3453 Rigid containers, e.g. trays, bottles, boxes, cups
• CPC Class Codes: Y10S 229/903 Ovenable, i.e. disclosed to be placed in an oven

Abstract

A microwave ovenable package is disclosed including a top structure which incorporates therein a pair of handle elements useful for removing the package from the microwave oven. In the preferred embodiment, the top structure includes integral side walls which are adhered to the sides of the package. The integral side walls are connected to the top structure along cut/scored lines which delaminate upon opening the top. The portions of the side walls which remain attached to the package can then be folded outwardly to produce handles for removing the package from the microwave oven.

Claims

1. A package prepared from paperboard for food products and consisting essentially of a substantially polygonal shaped tray portion for supporting and confining the food products, said tray portion comprising a bottom panel with upstanding side walls and corner panels, and a top structure of substantially the same shape as the tray portion for convering the stray portion, said top structure comprising a lid panel foldably attached to one of the side walls of said tray portion along a score line and including integral side walls which are foldably attached to the lid panel along additional score lines for overlapping the side walls of the tray portion, means for adhering portions of the top structure side walls that are remote from their score lines to the corresponding side walls of the tray portion and means in the lide panel for separating unadhered portions of at least two opposed side walls of the top structure from the lid panel to provide handle elements formed by the unadhered portions of the two opposed side walls of the top structure for said package.

2. The package of claim 1 wherein said tray portion is substantially rectangular in shape and the side walls of said top structure comprise a front wall and a pair of opposed side walls.

3. The package of claim 2 wherein the top structure front wall comprises two portions, an upper portion which is foldably attached to the lid panel along a front score line and a lower portion which is adhered to the corresponding side wall of the tray portion and which is connected to the upper portion along at least one tear line.

4. The package of claim 3 wherein the opposed side walls of said top structure each comprise two portions, upper portions which are foldably attached to the lid panel along second and third score lines and lower portions which are adhered to the corresponding side walls of the tray portion, and lower portions connected to adjacent upper portions along interrupted score lines, wherein the upper portions of the opposed side walls of the top structure comprise the handle elements of the package when they are separated from the lid panel.

5. The package of claim 4 wherein the means in the lid panel of the top structure for separating the upper portions of the opposed side walls of the top structure from the lid panel comprise microcuts located on an inside surface of the lid panel, parallel to and spaced a distance from the second and third score lines sufficient to produce a delamination of the top structure in those areas when the lid panel is raised.

6. The package of claim 5 wherein an additional microcut is located on the inside surface of the lid panel adjacent to the score line between the lid panel and one of the side walls of the tray portion to produce a delamination of the top structure in the area when the lid panel is removed.

7. A paperboard blank for making a carton with handles suitable for use in a microwave oven comprising:

(a) a tray portion bottom panel of substantially rectangular shape having side walls foldably attached to two opposed sides thereof and front and rear walls foldably attached to the remaining opposed sides thereof, and including gusset panels foldably attached between the ends of the respective side, front and rear walls;

(b) a top structure lid panel of substantially rectangular shape having one edge thereof foldably attached to the rear wall of the bottom panel of the tray portion, a pair of side walls foldably attached to opposed sides of said lid panel, and a front wall foldably attached to the remaining edge of said lid panel; and

,

(c) means in the front wall of the top structure forming a tearable opening for the carton formed from the blank, and means in the lid panel of the top structure for separating the side walls of the top structure from the lid panel to form handles for the carton and for separating the lid panel from the rear wall of the tray portion.

8. The blank of claim 7 wherein the means in the front wall of the top structure for opening the carton comprises a tear strip formed from at least one tear line which separates the front wall into two portions.

9. The blank of claim 8 wherein the means in the lid panel for separating the side walls from the lid panel and the lid panel from the rear wall of the tray portion comprises microcut lines located on the inside surface of the blank, parallel to and spaced a distance from the foldable connections between the lid panel, its side walls and the rear wall of the tray portion, sufficient to provide areas of delamination in the lid panel.