# US 10,307,933 B2 · Method for producing a wood structure with a decorational pattern, a device for patterning a piece of wood and a decorational wood structure

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- Number: US 10,307,933 B2
- Document ID: US10307933B2
- Status: Granted
- Kind: B2
- Application number: 15/578,729
- Filed: 2016-05-30
- Published: 2018-08-02
- Granted: 2019-06-04
- Earliest claimed: 2015-06-04
- Applicants: Jouni Lehmonen
- Inventors: Jouni Lehmonen
- Web page: https://patentgrep.com/patent/US10307933B2

## CPC

- B27M 1/08: by multi-step processes
- B27C 5/00: Machines designed for producing special profiles or shaped work, e.g. by rotary cutters; Equipment therefor (turning B27C7/00; features of copying devices B23Q35/00; slotting, mortising, making tongues or grooves B27F)
- B27C 5/06: Arrangements for clamping or feeding work
- B27M 3/0053: {using glue}
- B44C 1/22: Removing surface-material, e.g. by engraving, by etching {(for multi-layer articles B44C3/005)}
- B44C 1/222: {using machine-driven mechanical means}
- B44C 5/043: {containing wooden elements}
- B27M 1/003: {Mechanical surface treatment}
- B32B 38/10: Removing layers, or parts of layers, mechanically or chemically
- B27M: WORKING OF WOOD NOT PROVIDED FOR IN SUBCLASSES B27B - B27L; MANUFACTURE OF SPECIFIC WOODEN ARTICLES
- B27C: PLANING, DRILLING, MILLING, TURNING OR UNIVERSAL MACHINES FOR WOOD OR SIMILAR MATERIAL (machine tools in general B23; working wood using abrasive, e.g. sanding, devices B24; tools for these purposes B27G)
- B44C: PRODUCING DECORATIVE EFFECTS (processes for applying liquids or other fluent materials to surfaces, in general B05D; shaping of plastics or substances in a plastic state B29C; printing processes to produce transfer pictures B41M3/12; thermographic duplication or marking methods B41M5/00); MOSAICS; TARSIA WORK (imitation of mosaic or tarsia work patterns B44F11/04); PAPERHANGING {(labels G09F; multi-step processes for making paper labels or tags B31D1/02)}
- B32B: LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM

## Abstract

A method for mechanically producing a wood structure with a decorative pattern is disclosed, wherein partial patterns are processed onto a working face of a wood structure by moving at least one milling cutter of a processing head of a device for patterning transversely to the wood structure with the axis of rotation of the milling cutter at an inclined angle relative to the place of the working face in such a way that grooves that form the partial pattern are formed on the working face, each of the grooves having two planes set at an angle relative to each other while the depth of the groove changes in the transverse direction of the groove. In the method, the wood structure is formed of at least two or more adjacently placed pieces of wood each having two edges, wherein several successive grooves are formed onto the working face of at least two pieces of wood with a single milling movement, each single milling movement beginning or ending at an edge of the piece of wood so that the partial patterns form together the pattern of the wood structure. A corresponding device for patterning and a decorative wood structure are also disclosed.

## Claims

### Claim 1

A method for mechanically producing a wood structure with a decorational pattern, the wood structure having a plurality of pieces of wood, each piece having two edges, the method comprising the steps of:
dividing the decorational pattern of the wood structure into partial patterns using software means,
forming movement tracks of at least one milling cutter of a processing head of a device to process the wood structure based on the partial patterns using the software means,
processing partial patterns onto a working face of the plurality of pieces of the wood structure by moving, with a processing movement, the at least one milling cutter of a processing head of a device for patterning transversely to each piece of wood with an axis of rotation of the milling cutter at an inclined angle relative to a plane of said working face forming grooves of each partial pattern, each of the grooves having two planes set at an angle relative to each other and a changing depth in a transverse direction of the groove,
forming several grooves successively onto the working face of said plurality of pieces of wood with one said processing movement, each processing movement starting or ending at the edge of the piece of wood, and
forming the wood structure by placing said plurality of pieces of wood side by side wherein the partial patterns together form the decorational pattern of the wood structure.

### Claim 2 (depends on 1)

The method according to claim 1, wherein the method includes using a milling cutter having a length in the direction of the axis of rotation and a cross-directional diameter greater than or equal to a longest dimension of any one of the planes of the groove in the transverse direction of the groove.

### Claim 3 (depends on 1)

The method according to claim 1, wherein each groove is formed with one movement of the milling cutter.

### Claim 4 (depends on 1)

The method according to claim 1, wherein each processing movement is straight.

### Claim 5 (depends on 1)

The method according to claim 1, wherein partial patterns of the pieces of wood of the wood structure are formed by mathematically multiplying or dividing a length of the groove relative to a center line of the working face of the wood structure.

### Claim 6 (depends on 1)

The method according to claim 1, wherein said partial patterns are processed onto the working face, said working face being formed onto a surface of the wood structure with a smaller dimension to achieve a higher processing depth for the groove and a higher precision.

### Claim 7 (depends on 1)

The method according to claim 1, wherein the planes of each said groove are at a right angle relative to each other.

### Claim 8 (depends on 1)

The method according to claim 1, wherein said pattern is formed in steps based on an existing pattern model, the steps including:
selecting a pattern model to be formed in the wood structure,
specifying dimensions and coordinates of a pattern model,
dividing the pattern model into rasters according to the dimensions of the piece of wood to be partially patterned and said dimensions of the pattern model,
determining a darkness degree of the partial pattern in each raster,
determining a depth of a single-cut of the raster based on the darkness degree of each raster, and
creating control commands for the device for patterning for producing partial patterns in individual pieces of wood based on the depth of the single-cut.

### Claim 9 (depends on 8)

The method according to claim 8, wherein each depth of the groove of the partial pattern is selected based on the darkness degree determined in the raster of the pattern model in such a way that the depth of the groove increases as the darkness of the raster increases.