Method for production of a female embossing tool, a female embossing tool, and an embossing module equipped therewith

Patent metadata

Field	Value
Publication number	US-11203174-B2
Application number	US-202016800925-A
Country	US
Kind code	B2
Filing date	Feb 25, 2020
Priority date	Nov 5, 2014
Publication date	Dec 21, 2021
Grant date	Dec 21, 2021

Abstract

A method for production of a female embossing tool intended for embossing a sheet element: provide a female embossing tool with an outer layer made of a material with shape-memory type properties, and the outer face of the layer has no recesses; provide a male embossing tool with an outer face with at least one protuberance corresponding to at least one desired embossing relief that is to be formed on the sheet element after embossing; and cooperation of the male embossing tool with the female embossing tool such that the outer layer of the female embossing tool undergoes a plastic deformation which creates at least one recess of a shape complementary to the protuberance(s) of the male embossing tool.

First claim

What is claimed is:

1. An embossing tool set comprising a female embossing tool and a male embossing tool for embossing sheet elements configured to form packagings,
the female embossing tool comprising:
a first outer layer comprised of a material with shape-memory type properties; and
the male embossing tool comprising:
a second layer including at least one protuberance and configured to deform the first outer layer of the female embossing tool to create at least one recess of a shape complementary to the protuberance of the male embossing tool, such that the female embossing tool with the first outer layer in the deformed state together with the male tool with the second outer layer emboss the sheet elements when the sheet elements pass therebetween.

2. The female embossing tool according to claim 1 , wherein the material is selected from at least one of shape-memory metal alloys and polymer materials with shape-memory type properties.

3. The female embossing tool according to claim 1 , wherein the tool is flat and forms a tool for a platen press.

4. The female embossing tool according to claim 1 , wherein the tool has a cylindrical outer revolution face on which the material is located such that the tool forms a rotating female embossing tool on the outer revolution face.

Assignees

• Bobst Mex Sa

Inventors

• Pessotto Francesco
• Valterio Roberto

Classifications

• B31F2201/0743

  having a matching profile · CPC title

• B31F2201/0738

  Cross sectional profile of the embossments · CPC title

• B21B27/005

  Rolls with a roughened or textured surface; Methods for making same · CPC title

• B31F2201/0717

  Methods and means for forming the embossments · CPC title

• B31F1/07 Primary

  Embossing {, i.e. producing impressions formed by locally deep-drawing, e.g. using rolls provided with complementary profiles}({B31F1/128 takes precedence;} corrugating B31F1/20; embossing in combination with printing B41F19/02, B41M1/24; typewriters for embossing B41J3/38; stamping in combination with deforming B41K3/36) · CPC title