Paper food container having a bottom section formed with a flange

• US 5,351,879 A
• Filed: 09/02/1993
• Issued: 10/04/1994
• Est. Priority Date: 09/02/1993
• Status: Expired due to Fees

• Current Assignee: Richard C.H. Chang, Yuan-Shin Liu
• Original Assignee: Richard C.H. Chang, Yuan-Shin Liu
• Inventors: Liu, Yuan-Shin, Chang, Richard C. H.
• Primary Examiner(s): Elkins, Gary E.
• Application Number:
  US08/115,115
• Time in Patent Office: 397 Days
• Field of Search: 229/1.5 B, 229/104, 229/108, 229/109, 229/110, 229/169, 229/170, 229/186
• US Class Current: 229/104
• CPC Class Codes: B65D 5/2033 polygonal having more than four sides, e.g. hexagonal, octogonal
• CPC Class Codes: B65D 5/2038 at least two opposed folded-up portions having a non-rectangular shape
• CPC Class Codes: B65D 5/246 the container body comprising a continuous rim or flange

Abstract

A paper food container is disclosed having a bottom flange and formed form a paper board blank. The blank has a predetermined thickness and is cut into a predetermined pattern. Since the container will accommodate food products, the paper board is made of pure fiber and additives meeting FDA regulations. The blank is coated with polyethylene and laminated to an adequate thickness. The paper board is further embossed with folding lines so that the paper board can be folded about the folding lines and heat-sealed to form a bowl-like paper food container having a bottom formed with a flange which reinforces the paper food container and permits a user to securely hold the paper food container without being burned by the heat of the hot food contained in the paper food container.

Claims

1. A food container formed form a unitary paper board blank and comprising:

a) a bottom having a substantially planar, polygonal configuration with a plurality of sides;

b) a flange section foldably attached to each of the plurality of sides;

c) a wall section having an upper edge and a lower edge foldably attached to each flange section such that the wall sections and bottom define an interior of the food container, whereby the flange sections extend from the bottom in a direction away from the interior of the food container;

d) an inner folding edge section foldably attached to the upper edge of each wall section and extending outwardly from the interior of the food container;

e) an outer folding edge section foldably attached to each inner folding edge section and extending in contact with and parallel to the inner folding edge section; and

f) a polyethylene coating applied to the bottom, the flange sections, the wall sections, the inner folding edge sections and the outer folding edge sections such that they are held in position by heat sealing.

2. A unitary blank of paper board material for forming a food container, comprising:

a bottom having a substantially planar, polygonal configuration with a plurality of sides;

b) a flange section extending outwardly from each side of the bottom and forming a first fold line therebetween;

c) a wall section extending outwardly from each flange section and forming a second fold line therebetween;

d) an inner folding edge section extending outwardly from each wall section and forming a third fold line therebetween;

e) an outer folding edge section extending outwardly from each inner folding section and forming a fourth fold line therebetween;

f) an overlapping section extending between two adjacent wall sections and defining fifth and sixth fold lines between an overlapping section and the two adjacent wall sections; and

g) a coating of polyethylene material.