公开(公告)号：US20240017458A1

公开(公告)日：2024-01-18

申请号：US18021527

申请日：2021-09-02

Applicant: BOEGLI-GRAVURES SA

Inventor： Charles BOEGLI ,  Gabriel DUMITRU

IPC: B29C45/37 ,  B23K26/352 ,  B29C33/38

CPC classification number: B29C45/372 ,  B23K26/355 ,  B29C33/3842

Abstract: A method for manufacturing an embossing device or injection mold including the steps of providing a hard coated embossing roller having a cylindrically-shaped core and a hard-coating layer, the hard-coating layer having a thickness of equal or less than 30 μm, and performing laser ablation to the hard-coated cylinder to remove material from the hard-coating layer to form opening, a surface of the opening forming a structural feature into the hard-coating layer, to form a structured hard-coated cylinder.

公开(公告)号：US20240253152A1

公开(公告)日：2024-08-01

申请号：US18561660

申请日：2022-05-19

Applicant: BOEGLI-GRAVURES SA

Inventor： Charles BOEGLI ,  Gabriel DUMITRU ,  Alain DROZ ,  Mario TONIN

IPC: B23K26/04 ,  B23K26/03 ,  B23K26/06 ,  B23K26/067 ,  B23K26/362 ,  B42D25/328 ,  B42D25/435

CPC classification number: B23K26/048 ,  B23K26/032 ,  B23K26/0648 ,  B23K26/067 ,  B23K26/362 ,  B42D25/328 ,  B42D25/435

Abstract: A device for engraving a diffraction grating on a workpiece, comprises an optical set-up comprising a laser, a beam forming device, a beam splitting device, and a focusing head. The laser is configured to output a laser beam. The beam forming device is configured to control a diameter of and a light intensity distribution in the laser beam, and output a primary laser beam. The beam splitting device is configured for a splitting of the primary laser beam into a plurality of split beams for the engraving. The focusing head comprises a microscope objective lens (109) configured to focus the respective split beams in respective foci on the workpiece, an auto-focusing system configured to produce a positioning signal for adjusting and maintaining a distance between the microscope objective lens and the workpiece in order to maintain the respective foci of the split beams on the workpiece and output the positioning signal; and a micro-actuator configured to receive the positioning signal and adjust the distance between the microscope objective lens and the workpiece, whereby the auto-focusing system and the micro-actuator are operationally connected in a closed-loop. The device for engraving further comprises a positioning device configured to perform a relative positioning between the workpiece in the respective foci of the split beams, and the optical set-up; and a controller configured to control the positioning device and the laser according to engraving instructions for the diffraction grating.

公开(公告)号：US20240343013A1

公开(公告)日：2024-10-17

申请号：US18682821

申请日：2021-08-13

Applicant: BOEGLI-GRAVURES SA

Inventor： Charles BOEGLI ,  Gabriel DUMITRU

IPC: B31F1/07

CPC classification number: B31F1/07 ,  B31F2201/0743 ,  B31F2201/0761 ,  B31F2201/0784

Abstract: A method for embossing a barrier paper, wherein the barrier paper comprises paper and a protective layer on at least one of its sides. The method comprises providing a first embossing system with a first embossing tool and a second embossing tool cooperating with the first embossing tool to emboss the barrier paper: providing a patrix structure on the first embossing tool: providing a matrix structure on the second embossing tool: whereby the matrix structure corresponds to the patrix structure in such a manner that when embossing the barrier paper, a functionality of the protective layer is preserved. The method further comprises embossing the barrier paper by inserting the barrier paper between the first and the second embossing tools, applying pressure between the patrix and the matrix structures to press the patrix structure on a paper side which is a side of the barrier paper opposite to the side with the protective layer of the barrier paper, and push the barrier paper in the matrix structure, whereby the protective layer faces the matrix structure, thereby modifying a fiber structure of the paper in the barrier paper by at least one of the following effects: breaking of paper fibers, compressing of the paper fibers, densifying of the paper fibers; resulting in a modified folding behavior of the barrier paper and in maintaining a substantially unchanged shape of the barrier paper over its lifetime.

公开(公告)号：US20240157666A1

公开(公告)日：2024-05-16

申请号：US18339918

申请日：2023-06-22

Applicant: Boegli-Gravures SA

Inventor： Charles BOEGLI ,  Gabriel DUMITRU ,  Luis Antonio SANCHES ,  Tadas Lukas LISAUSKAS ,  Paulius JURGUTIS

IPC: B31F1/07 ,  A24D3/02

CPC classification number: B31F1/07 ,  A24D3/02 ,  B31F2201/0733

Abstract: A method for embossing a sheet of substrate, wherein the embossing is realized by providing means of at least a first embossing roller and a second embossing roller configured to emboss first structures and second structures, thereby embossing the sheet of substrate when this passes in a nip formed by the first and second embossing rollers, whereby the embossed sheet of substrate is configured to be used in a manufacturing of cigarette filters, and is further configured to be entirely biodegradable. The method comprises providing a sheet of substrate. The method further comprises any one of the embossing steps in a list comprising: embossing the sheet of substrate with first structures to form crimping lines; embossing the sheet of substrate with second structures to form chimney structures; embossing the sheet of substrate with a combination of first and second structures to form crimping lines and chimney structures respectively. The crimping lines have a first width at a surface level of the sheet of substrate, and a first height or depth measured from the surface level in a first range of 0.1 mm to 0.5 mm, thereby configured to be deformable when used in the manufacturing process of cigarette filters. the chimney structures comprise segments that have a second width at the surface level of the sheet of substrate, in a second range of 0.5 mm to 5.0 mm, and a second height or depth measured from the surface level in a third range of 0.1 mm to 1.5 mm, thereby configured to remain open when used in the manufacturing process of cigarette filters and influence a pressure drop of air in such cigarette filters. Further the sheet of substrate comprises fibers with a cut length in a fourth range of 0.5 mm to 6.0 mm, and with a diameter in a fifth range of 10 μm to 500 μm, the fibers being entirely biodegradable and randomly distributed to deliver an air permeability. The sheet of substrate's air permeability being configured with filtration capabilities of substances present in a cigarette smoke.

公开(公告)号：US20250041972A1

公开(公告)日：2025-02-06

申请号：US18722465

申请日：2022-12-21

Applicant: BOEGLI-GRAVURES SA

Inventor： Charles BOEGLI ,  Gabriel DUMITRU ,  Mario TONIN

IPC: B23K26/359 ,  B23K26/064

Abstract: A method for obtaining engraving instructions to control a system comprising a Spatial Light Modulator (SLM), the engraving instructions being configured to control the system to represent a pixelized image on a solid piece by means of an engraving beam. The engraving beam is formed by an adjustable number of focal spots aligned on an orientation axis, thereby defining a brush, and is generated by means of a laser and the SLM. The pixelized image comprises at least a first delimited surface to which is attributed a first appearance, the first appearance corresponding to a set of a first angle of orientation of the brush and a first period corresponding to a distance separating one focal spot from a next focal spot in the brush, the first delimited surface to be filled with engraved structures arranged as first linear segments by means of the engraving beam, the first linear segments being perpendicular to the first orientation of the brush. The method comprises uploading of the pixelized image of the first delimited surface into a memory of the system; uploading a table of appearances comprising at least for the first appearance a set with the first angle of orientation and the first period; uploading parameters for available brush widths at least for the first appearance, the parameters comprising a list of at least one brush with a determined number of focal spots. The method further comprises rotating the first delimited surface as a function of an angle of rotation corresponding to the first angle of orientation; re-pixelization of the rotated first delimited surface; determining of a start position and an end position of each of the linear segments in order to sweep the rotated first delimited surface with the brush having the widest possible width in successive and adjacent stripes; determining of a first remaining surface not yet swept of the rotated first delimited surface and repeating the step of determining of a start position and an end position of the linear segments having a smaller width corresponding to an available brush that is smaller than the previously used brush; generating a computer-generated hologram for each available width of available brushes used with the first angle of orientation; and sending engraving instructions to a further memory of the system.

公开(公告)号：US20230356454A1

公开(公告)日：2023-11-09

申请号：US18021776

申请日：2021-09-02

Applicant: BOEGLI-GRAVURES SA

Inventor： Charles BOEGLI ,  Gabriel DUMITRU

IPC: B29C59/04 ,  B29C33/38 ,  B29C33/56 ,  B29C45/26 ,  B29C45/37

CPC classification number: B29C59/04 ,  B29C33/3842 ,  B29C33/56 ,  B29C45/263 ,  B29C45/37 ,  B29C2045/0094

Abstract: A method for manufacturing a structured embossing cylinder for embossing system including the steps of providing a hard-coated embossing roller having a cylindrically-shaped core and a hard-coating layer on the cylindrically-shaped core, the hard-coating layer having a thickness in a range between 1 gm and 10 gm, and having a surface-roughness value RA of less than 100 nm, depositing a masking layer on the hard-coating layer, the masking layer having a thickness of equal or less than 100 nm, removing material from the masking layer to form at least one opening, and etching to remove material at the at least one opening of the masking layer from the hard-coating layer to form a surface cavity in the hard-coating layer at the at least one opening, the surface cavity forming a structural embossing feature into the hard-coating layer, thereby forming the structured embossing cylinder.

公开(公告)号：US20230249430A1

公开(公告)日：2023-08-10

申请号：US18012874

申请日：2021-06-23

Applicant: BOEGLI-GRAVURES SA

Inventor： Charles BOEGLI ,  Alain DROZ ,  Gabriel DUMITRU ,  Felix LUSTENBERGER

IPC: B31F1/07 ,  G07D7/005

CPC classification number: B31F1/07 ,  G07D7/005 ,  B31F2201/0733 ,  B31F2201/0738 ,  B31F2201/072

Abstract: An engraved solid piece carries data comprising specific information on a surface of the engraved solid piece. The surface is covered by a plurality of block structures, comprising at least a first block structure. Each block structure is a spatially restricted collection of modulated features and base features, which are spread over the surface of the engraved solid piece. Each modulated feature and each base feature has respectively a three-dimensional modulated-feature profile and a three-dimensional base-feature profile. Each of the modulated-feature profiles is the result of applying a corresponding modulation to one of the three-dimensional base-feature profiles, according to a specific, corresponding information. Each modulated feature further is a symbol, which is a transcription of a character of an alphabet. The alphabet is a collection of characters, which are distinct objects of well-defined elementary data. Each of the base features is an engraved elementary three-dimensional topographical element of the surface. Each of the modulated features is an engraved three-dimensional topographical element of the surface. At least a part of the data is transcribed by a code-block structure of modulated features, the code-block structure thereby constituting at least a part of a block structure corresponding to the at least one part of the data. The modulated features of the first block structure are arranged according to a first ordered map, the first ordered map comprising at least a first finite ordered set of first positions of the modulated features of a first code-block structure on the surface, the first block structure corresponding to a first part of the data, and the first ordered map further is configured to arrange the modulated features of the first block structure to constitute an aesthetic ensemble on the surface and render the respective symbols corresponding to the modulated features of the first code-block structure imperceptible to the human eye, but retrievable by means of a software-driven image-sensor/processor combination.