Hand-tearable adheasive tape with a tear-propagating film backing
AssigneeTesa SE
InventorChristof-Gottfried Hoelger
Life of this patent
Estimating the term…
Abstract
An adhesive tape having a film backing material in which a tear can be propagated transversely with respect to the direction from which individual lengths of the tape are taken, an adhesive being applied to one or both sides of said backing material, and one of the two longitudinal edges having a rough cut edge such that over the entire area there are notches in a frequency of at least 1/mm, the notches being disposed irregularly and differing in depth, and the other longitudinal edge being substantially smooth and having no such notches or a greatly reduced number thereof.
Claims15
A manually tearable adhesive tape comprising
- a film backing material having a first and a second side, and being capable of propagating a tear transversely with respect to the direction of the lengths of the tape;
- an adhesive being applied to at least one of the first side and the second side of the backing material;
- the tape having a first and a second longitudinal edge, the first longitudinal edge having a rough-cut edge such as to provide notches in a frequency of at least 1 per mm, the notches being disposed in irregular intervals and having irregular depth, the second longitudinal edge being substantially smooth and having substantially no notches or a greatly reduced number of notches.
A method for manually tearing adhesive tape comprising
- providing a film backing material having a first and a second side;
- providing an adhesive layer being applied to at least one of the first side and the second side of the backing material;
- the tape having a first and a second longitudinal edge, the first longitudinal edge having a rough-cut edge such as to provide notches in a frequency of at least 1 per mm, the notches being disposed in irregular intervals and having irregular depth, the second longitudinal edge being substantially smooth and having substantially no notches or a greatly reduced number of notches;
- wherein the tape being capable of propagating a tear transversely with respect to the direction of the lengths of the tape.
Dependencies are inferred from the claim text.