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US 2012/0040158 A1Published application
Core for a product in sheet form wound around this core, and roll formed with such a core
AssigneeGeorgia-Pacific France
InventorsDamien Brendle, Benoit Hoeft, Pierre Laurent, Rene Sigwalt, Remy Ruppel
Life of this patent
Estimating the term…
Abstract
A core has a cylindrical wall which that can be torn axially and is made up of two superposed strips, these strips respectively being an outer strip in contact with the product and an inner strip, these strips being wound on one another and joined together by regions of attachment for example by bonding. At least one of the longitudinal edges of the inner strip is not attached or is weakly attached over a determined width in order, over at least part of its helical length, to form a free and accessible tab facing the outer strip.
Claims14
A core, comprising:
- a tearable cylindrical wall around which a product in sheet form, may be wound to form a roll, the core having a length at least equal to half the length of the roll, and having to be torn in order to access the sheet-form product from inside the roll;
- wherein the cylindrical wall is made up of at least one strip wound in a helix with an overlapping section, said overlapping section comprising a longitudinal inner edge;
- wherein said overlapping section comprises a first part and a second part, said first part forming a tab, said tab being weakly attached or not attached over a defined width from said longitudinal edge in order to be free and accessible from the inside of the core, the second part forming an attachment region of the strip and being disengageable when submitted to an axially directed force of between 1000 cN and 3000 cN.
Dependencies are inferred from the claim text.