Cardboard container for drinks and process therefor

• US 7,100,770 B2
• Filed: 01/15/2002
• Issued: 09/05/2006
• Est. Priority Date: 01/30/2001
• Status: Expired due to Term

• Current Assignee: Seda S.p.A.
• Original Assignee: Seda S.p.A.
• Inventors: D'Amato, Gianfranco
• Primary Examiner(s): Elkins, Gary E.
• Application Number:
  US10/470,431
• Publication Number:
  US 20040094612A1
• Time in Patent Office: 1,694 Days
• Field of Search: 229/400, 229/403, 206/505, 206/506, 206/515, 206/518, 206/519, 206/520, 493/58, 493/111, 493/112, 493/114, 493/152, 493/154, 493/155, 493/158, 493/159
• US Class Current: 206/505
• CPC Class Codes: B31B 2105/00 Rigid or semi-rigid containers made by assembling separate sheets, blanks or webs
• CPC Class Codes: B31B 2105/001 made from laminated webs, e.g. including laminating the webs
• CPC Class Codes: B31B 2105/0022 Making boxes from tubular webs or blanks, e.g. with separate bottoms, including tube or bottom forming operations
• CPC Class Codes: B31B 2120/002 having contracted or rolled necks, having shoulders
• CPC Class Codes: B31B 50/254 using tools mounted on belts or chains
• CPC Class Codes: B31B 50/256 using tools mounted on a drum
• CPC Class Codes: B31B 50/28 around mandrels, e.g. for forming bottoms
• CPC Class Codes: B31B 50/81 Forming or attaching accessories, e.g. opening devices, closures or tear strings
• CPC Class Codes: B31F 1/0038 Rim-rolling
• CPC Class Codes: B31F 1/10 by rotary tools
• CPC Class Codes: B65D 21/0233 Nestable containers
• CPC Class Codes: B65D 3/22 with double walls; with walls incorporating air-chambers; with walls made of laminated material for thermal insulating purposes B65D81/3818
• CPC Class Codes: B65D 81/3869 formed with double walls, i.e. hollow

Abstract

A cardboard container for drinks and a process for making it is provided. The container has a perimetral wall (2) and a bottom wall and includes elements (4) for supporting another such container (1) nested inside.

Claims

1. A nestable cardboard container (1), having a downwardly tapering conical inner wall (2) and a downwardly tapering conical outer wall (7), said walls being joined at the upper rim of the container, said outer wall (7) at its lower end resting against the outside surface of the inner wall (2) with an inwardly turned edge (8) so as to form an air gap between said walls, the inwardly turned edge (8) being located at a distance above the bottom rim of the container, the inner wall (2) having an inwardly protruding creasing (4) extending in the circumferential direction, said creasing being located above the bottom of the container thereby forming an abutment for the inwardly turned edge (8) of a nesting further container, the arrangement of the inwardly turned edge (8) and the inwardly extending creasing (4) being such that in the nested state the inner nested container is maintained in position in the outer container without making the outer wall (7) of the inner container adhere to the inside surface (3) of the inner wall (2) of the outer container.

2. A process for manufacturing a cardboard container (1), which comprises the following steps:

providing a blank (1),

arranging said blank (1) on a revolving supporting member (5) having a perimetral groove and form an inner wall (2) of said cardboard container(1),

forming a perimetral inwardly projecting creasing (4) distant from a bottom rim of said container inner wall (2) with a related complementary knurl (6) adapted to co-operate with said perimetral groove of said revolving supporting member (5),

fixing an outer wall (7) on the outer side of said container inner wall (2) with an air gap formed between both walls (2, 7), the outer wall (7) having a lower inwardly turned edge (8) situated nearer to said inner wall bottom rim than said creasing (4);

wherein said inner wall (2) and outer wall (7) are downwardly tapering and conical, said walls being joined at the upper rim of the container, said outer wall (7) at its lower end resting against the outside surface of the inner wall (2) with said inwardly turned edge (8) so as to form said air gap between said walls, the inwardly turned edge (8) being located at a distance above the bottom rim of the container, said inwardly protruding creasing (4) extending in the circumferential direction, said creasing being located above the bottom of the container thereby forming an abutment for the inwardly turned edge (8) of a nesting further container, the arrangement of the inwardly turned edge (8) and the inwardly extending creasing (4) being such that in the nested state the inner nested container is maintained in position in the outer container without making the outer wall (7) of the inner container adhere to the inside surface (3) of the inner wall (2) of the outer container.