US 9,579,924 B2Granted

Method for manufacturing a set of embossing rollers

AssigneeBoegli-Gravures S.A.

InventorCharles Boegli

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Abstract

In the method for manufacturing embossing rollers for a device for embossing packaging materials that comprises a set of at least two embossing rollers of which one is driven, and whereby the embossing roller set comprises a male roller having a male surface structure including structural elements and/or logo structures and a female roller having a female surface structure that is associated to the surface structure of the male roller for the common embossing operation with the male roller, the female surface structure is produced independently of a previously produced or physically pre-existing associated male surface structure. Along with a high embossing accuracy, this allows creating a very large variety of embossing structures, on one hand, and using a very large number of the most diverse materials, on the other hand, as well as reducing transverse tensions in the embossed material.

Claims25

Dependent claims

A method for manufacturing a set of embossing rollers for a device for embossing packaging materials that has two rollers, the set of embossing rollers comprising a male roller having a male surface structure including structural elements and/or logo structures and a female roller having a female surface structure that is associated to the surface structure of the male roller for the common embossing operation with the male roller, the set of embossing rollers designed for fine embossing in an on-line process, the method comprising:

producing the male roller having the male surface structure;
producing the associated female roller independently of the male roller, the female roller having the female surface structure including structural elements and/or logo structures, the steps of producing the male roller and the female roller include the steps of
manufacturing contours of the male surface structure and the female surface structure with an overall linear error of less than +/−10 μm and an angular error of less than 4°, such that dimensions of the structural elements of the male roller and dimensions of the structural elements of the female roller deviate from one another by a pre-determined amount without impairing a cooperation between the male roller and the female roller, and
manufacturing at least one of
voluntary deviations of linear dimensions of the structural elements of the male roller and the structural elements of the female roller to be greater than 15 μm, and
voluntary deviations of angular dimensions of angles of edges of the structural elements of the male roller and angles of edges of the structural elements of the female roller to be more than 4°.

3 more elements

A method for manufacturing a set of embossing rollers for embossing packaging materials, the set of embossing rollers comprising a male roller having a male surface structure and an associated female roller having a female surface structure that is associated with the male surface structure of the male roller for an embossing operation with the male roller, the method comprising:

producing the male roller having the male surface structure;
producing the female roller having the female surface structure, the steps of producing the male roller and the associated female roller including the steps of
manufacturing contours of the male surface structure and the female surface structure with an overall linear error of less than +/−10 μm and an angular error of less than 4°, such that dimensions of the structural elements of the male roller and dimensions of the structural elements of the female roller deviate from one another by a pre-determined amount without impairing a cooperation between the male roller and the female roller, and
manufacturing at least one of
voluntary deviations of linear dimensions of the structural elements of the male roller and the structural elements of the female roller to be greater than 15 μm, and
voluntary deviations of angular dimensions of angles of edges of the structural elements of the male roller and angles of edges of the structural elements of the female roller to be more than 4°,
wherein the male surface structure and the female surface structure are each made of at least one of steel, hard metal, or ceramic material.

4 more elements

Dependencies are inferred from the claim text.