Method and embossing structure for maximizing pressure buildup at rotational embossing of foils
US11453190B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 19, 2017 |
| Grant date | Sep 27, 2022 |
| Priority date | — |
| Expiry date | Apr 22, 2038 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB31F2201/0753
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
An embossing method allowing to emboss a material on both sides comprises feeding the foil material into a roll nip between a pair of a first roll and a second roll, providing the first roll and the second roll each with a plurality of positive projections and a plurality of negative projections of identical shaped polyhedral structures, a first subset of the plurality of positive projections being disposed with a first periodicity on a first grid in axial direction and a second periodicity on the first grid in circumferential direction on the first roll, and a second subset of the plurality of negative projections being disposed with the first periodicity in axial direction and the second periodicity in circumferential direction on the first grid intertwined with the positive projections, in axial and circumferential directions respectively, and projections complementary to the first grid, on the second roll, each of the positive projections and the negative projections on the first roll during operation of the rolls and in the roll nip being surrounded on all sides by positive projections and negative projections on the second roll, the positive projections of the first roll toge…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.