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US 11,241,033 B2Granted
Method for applying register marks to wrapping paper for smoking articles
Assigneedelfortgroup AG
InventorDaniel Fischer
Life of this patent
Estimating the term…
Abstract
The invention relates to a method for marking a wrapping paper for smoking articles, comprising the following steps: (A) providing a wrapping paper for smoking articles, and (B) producing register marks on the wrapping paper by treating the surface of the wrapping paper with laser radiation having an energy density y in J-m-2, to which the following applies: y=k·x, whereby x is the enthalpy of combustion per volume of the wrapping paper in J·m−2·μm−1, and k is at least −8 μm and at most −1 μm.
Claims41
Method for marking a wrapping paper for smoking articles, comprising the following steps:
- (A) providing a wrapping paper for smoking articles, wherein the wrapping paper comprises pulp fibers,
- (B) producing register marks on the wrapping paper by means of at least the following step
- (B.3) treating the surface of the wrapping paper with laser radiation with an energy density y in J·m−2, for which y=k·x holds,
- wherein x is the enthalpy of combustion per volume of the wrapping paper in J·m−2·μm−1,
- wherein k is at least −8 μm and
- at most −1 μm,
- wherein either in a step (C), regularly repeating structures are produced on the wrapping paper, so that each structure is located at a fixed distance in the machine direction relative to at least one register mark, or a wrapping paper is provided in step (A) which has regularly repeating structures in the machine direction, and the register marks are produced on the wrapping paper in step (B) such that each register mark is located at a fixed distance in the machine direction relative to at least one structure, wherein at least one section of the register mark has an extension in the machine direction of at least 0.01 mm.
4 more elements
Dependencies are inferred from the claim text.