US 7,731,645 B2Granted

Method for forming a container blank including a seal

AssigneeEco Lean Research & Development A/S

InventorsPer Gustavsson, Bengt Jönsson

Life of this patent

Estimating the term…

Loading patent…

Abstract

The preset invention relates to a method, use of the method and a device for making a seal in a portion of a material web. The material web includes a first elongate section with a first number of layers of material and a second elongate section with a second number of layers of material, at least one of the layers of material being included in both the first and the second section, the portion having an extent that intersects a transition from the first section to the second section of the material web, the method including connecting, in the portion, opposite surfaces of the layers of material of the material web to each other. The method including forming ridges and valleys in the portion, and orienting the ridges and valleys in such a manner that they have an extent intersecting the transition.

Claims7

Dependent claims

A method for forming a container blank made of a material web, said container blank comprising a first elongate section with four layers of material, wherein a bottom section of said container blank is formed from said first elongate section, said bottom section including a bottom wall folded into a double-walled shape, and a second elongate section with two layers of material, wherein a body section of said container blank is formed from said second elongate section, at least one of said layers of material being included in both the first and the second elongate sections, the method comprising:

providing a seal extending across a portion of the container blank having an extent that intersects a transition from the first elongate section to the second elongate section of the material web by connecting, in said portion, opposite surfaces of the layers of material of the material web to each other, said transition having an elongated length and the portion comprising less than the entire elongated length of the transition, said connecting including:
arranging said portion of the material web between an abutment and a sealing tool, whereby at least one of the abutment or the sealing tool comprises recesses, and whereby a surface of the abutment facing the sealing tool is non-complementary to a surface of the sealing tool facing the abutment,
bringing together said abutment and said sealing tool for forming ridges and valleys by moving material in said portion into said recesses, and
orienting said ridges and valleys in such a manner that said ridges and valleys have an extent intersecting said transition.

1 more element

Dependencies are inferred from the claim text.

Facts

Application: 11/597,375Filed 3 Jun 2005
Priority: SE 04014639 Jun 2004
Published: US 2007/0245693 A125 Oct 2007
Granted: 8 Jun 2010
Term ends: Not estimatedThe source records don’t support an estimate.

Classification27 codes

B29C 66/80
General aspects of processes or apparatus for joining preformed parts: general aspects of machine operations or constructions and parts thereof
B29C 65/18
By heating, with or without pressure: using heated tools
B29C 65/305
Electrical means: involving the use of cartridge heaters
B29C 65/5057
Using adhesive tape , e.g. thermoplastic tape; using threads or the like: positioned between the surfaces to be joined