Blank for cup-shaped container of cardboard or the like

• US 4,199,097 A
• Filed: 10/24/1978
• Issued: 04/22/1980
• Est. Priority Date: 10/25/1977
• Status: Expired due to Term

• Current Assignee: Esseltepac AB
• Original Assignee: Esseltepac AB
• Inventors: Christensson, Od W.
• Primary Examiner(s): Moorhead, Davis T.
• Application Number:
  US05/954,075
• Time in Patent Office: 546 Days
• Field of Search: 229/30, 229/31, 229/34, 229/35
• US Class Current: 229/106
• CPC Class Codes: B65D 5/2019 with at least partially curved edges or the like
• CPC Class Codes: B65D 5/2038 at least two opposed folded-up portions having a non-rectangular shape
• 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 5/244 and the gussets folds connected to the outside of the container body B65D5/247, B65D5/248 take precedence
• CPC Class Codes: B65D 5/443 Integral reinforcements, e.g. folds, flaps double walls B65D5/02

Abstract

A blank is provided for a cup-shaped container to be fabricated of cardboard or the like. The container is of a type comprising substantially rectangular sides which extend upwardly from a bottom and which include rounded corners of the upper edge thereof and an edge flange which projects obliquely downwardly at an angle along the sides. The blank is formed as an integral unit comprising outwardly extending sides which are intergral with a bottom portion and which include a portion that is at least partially bowed when the blank is formed into the container and forms part of the edge flange of the formed container. The edge flange itself comprises an edge flange strip and a reinforcing strip defined by a pair of fold lines in the sides of the blank. V-shaped notches are provided in the bowed portion of the blank thereby enabling the reinforcing strip to extend along a straight line and to be attached to the edge flange strip in planar relationship, thereby providing a double folded edge flange which is folded outwardly and downwardly simultaneously with the sides of the blank being folded upwardly from the bottom portion.

Claims

1. A blank for a cup-shaped container fabricated of cardboard or the like and comprising a bottom of substantially rectangular shape, a plurality of sides projecting upwardly from side edges of the bottom and having rounded corners at the upper edge thereof and an edge flange projecting obliquely downwardly at an angle along said sides from the upper edge and extending continuously around the entire upper edge, said blank being formed as an integral unit comprising a bottom portion and sides which are integral with said bottom portion, each of two opposite sides of said blank being longer than the lateral edge of the bottom portion with which said two sides are integral, said two sides including a portion which is partially bowed when the blank is formed into the container so as to provide the rounded corners of the container and which is an integral part of the edge flange of the formed container, the total length of the edge flange corresponding to the periphery of the container at the upper edge thereof, said edge flange of said blank comprising a combination of an edge flange strip and reinforcing strip which extend parallel to each other and are defined relative to the corresponding sides of the blank by parallel lines in said corresponding sides, a portion of each said reinforcing strip, formed by the bowed portion of the sides which provide the rounded corners of the containers, having at least two V-shaped notches therein enabling the reinforcing strip to extend along a straight line and be attached to the edge flange strip in planar relationship to provide a double folded edge flange which is folded outwardly and downwardly at the same time as the associated sides of the blank are similarly bowed to provide the rounded shaped at the upper edge of the container when the container is formed.

2. Container blank according to claim 1, wherein the reinforcing strips, at each bowed portion thereof corresponding to a rounded corner of the container, has three V-shaped notches therein and wherein the reinforcing strip is folded and attached by glueing to the underside ot the edge flange.

3. Container blank according to claim 2, wherein in the glueing of the reinforcing strip to the edge flange strip is provided by a press force which is applied inwardly of the folded edge thereof so that a narrow thickened rib of material is formed at the outer edge of the edge flange.

4. Container blank according to any one of claims 1 to 3, wherein a further reinforcing strip is provided outside the first mentioned reinforcing strip at least one straight portion thereof, said reinforcing strip being folded in and attached to the first mentioned reinforcing strip, and the first mentioned reinforcing strip, together with the further reinforcing strip, being folded in and attached to edge flange strip so that a triple folded layer of material is provided at the said straight portion of the edge flange.