EP3945137A1 - Procédé de marquage et d'identification d'une peau - Google Patents

Procédé de marquage et d'identification d'une peau Download PDF

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Publication number
EP3945137A1
EP3945137A1 EP20188362.6A EP20188362A EP3945137A1 EP 3945137 A1 EP3945137 A1 EP 3945137A1 EP 20188362 A EP20188362 A EP 20188362A EP 3945137 A1 EP3945137 A1 EP 3945137A1
Authority
EP
European Patent Office
Prior art keywords
skin
identification code
elongated holes
holes
camera
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP20188362.6A
Other languages
German (de)
English (en)
Inventor
Gabriel Peltea
Andreas Kindermann
Michael Wensauer
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Wollsdorf International GmbH
Slcr Lasertechnik GmbH
Original Assignee
Wollsdorf International GmbH
Slcr Lasertechnik GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Wollsdorf International GmbH, Slcr Lasertechnik GmbH filed Critical Wollsdorf International GmbH
Priority to EP20188362.6A priority Critical patent/EP3945137A1/fr
Priority to MX2021009115A priority patent/MX2021009115A/es
Publication of EP3945137A1 publication Critical patent/EP3945137A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C14—SKINS; HIDES; PELTS; LEATHER
    • C14B—MECHANICAL TREATMENT OR PROCESSING OF SKINS, HIDES OR LEATHER IN GENERAL; PELT-SHEARING MACHINES; INTESTINE-SPLITTING MACHINES
    • C14B5/00—Clicking, perforating, or cutting leather
    • C—CHEMISTRY; METALLURGY
    • C14—SKINS; HIDES; PELTS; LEATHER
    • C14B—MECHANICAL TREATMENT OR PROCESSING OF SKINS, HIDES OR LEATHER IN GENERAL; PELT-SHEARING MACHINES; INTESTINE-SPLITTING MACHINES
    • C14B1/00—Manufacture of leather; Machines or devices therefor
    • C14B1/44—Mechanical treatment of leather surfaces
    • C14B1/56—Ornamenting, producing designs, embossing

Definitions

  • the invention relates to a method for marking and identifying a hide, in particular in leather manufacture, in which an identification code is provided in the hide, the identification code having holes which completely penetrate the hide and form the identification code.
  • the present invention has therefore set itself the task of improving the reliability of a method for marking and identifying a hide of the type mentioned at the outset in such a way that the identification code once introduced into the hide remains intact and legible throughout the processing operation.
  • the invention achieves the object of the invention in that slots are made in the skin to form the identification code, each extending along a longitudinal direction, with at least two slots being made in the skin with their longitudinal directions perpendicular to one another.
  • the introduction of the identification code into a skin can take place at any time during the processing of the skin.
  • the identification code can be incorporated, for example, in the freshly slaughtered, salted or limed rawhide, in the tanned hide (wet white or wet blue) or in the finished crust leather or in the finished finished leather.
  • the identification code As the holes in the identification code fully penetrate the skin, it can be ensured that the identification code remains intact and legible throughout the processing. If the identification code is introduced into the limed rawhide before splitting, for example, a split croupon removed from the back of the hide can automatically carry the same number and traceability of the split croupon to the original hide can be ensured. A possible link with the number on the animal's ear tag even enables "cradle to cradle" traceability of the skin along the entire value chain.
  • elongated holes are made in the skin to form the identification code, with the elongated holes each extending along longitudinal directions, the different shape of the elongated holes can ensure easier recognition of the identification code, since these can be distinguished more reliably from defects and imperfections in the skin can become. On the other hand, elongated holes can have a lower tendency towards clogging of the holes during different processing steps and thus further improve the reliability of the method.
  • the recognisability and readability of the identification code can be ensured throughout the entire manufacturing process.
  • Certain processing steps of the skin such as in particular splitting, grinding, spatula or trimming, can lead to clogging or overgrowth of holes, preferably along the collagen fiber direction of the skin.
  • the permanent identification code can also save skin area as a positive side effect, since the renewal of the stamps can be omitted and a single identification code takes up less space than the up to 6 stamp numbers that are usually used with marking methods known from the prior art at different places in different Manufacturing stages must be introduced. In addition, the effort involved in documenting traceability can be reduced.
  • oblong holes arranged one below the other can be introduced into the skin to form the identification code.
  • the elongated holes are made alternately in the rows arranged one below the other with their longitudinal directions perpendicular to one another, the recognizability and readability of the identification code and thus the overall reliability of the method can be further improved.
  • the elongated holes in each row of the identification code can form a machine-readable code.
  • the elongated holes in the identification code can form a visually readable font.
  • the elongated holes in individual characters are grouped, with each character being formed from a plurality of oblong holes in a plurality of rows arranged one below the other.
  • the characters of the human-readable font can thus be read and identified at any time by employees without technical aids, for example in the course of a quality inspection.
  • the human-readable writing can consist of Latin letters and/or Arabic numerals, for example. In the same way, common characters are possible according to the prevailing language.
  • the human-readable writing can be formed from characters which have a grid with grid points, at which a slot can optionally be provided.
  • the grid can be a 2 ⁇ 5 grid with two possible oblong holes in five rows arranged one below the other. By optionally providing elongated holes at the grid points, the different characters are then formed, which together form the identification code.
  • the elongated holes can preferably have an essentially rectangular shape, which further improves the recognisability of the identification code.
  • the elongated holes can have a ratio between length and width of at least 2, in particular at least 2.5. Due to the advantageous ratio between length and width, the tendency of the holes to become clogged can be reduced and the reliability of the method can thus be further increased.
  • the elongated holes can be introduced into the skin along their longitudinal direction at a distance of at least 0.5 times their length, in particular at least 0.75 times their length.
  • the tendency of the holes to tear out, for example when the skin is split, can be significantly reduced.
  • the elongated holes can have a length of at least 4 mm, in particular at least 5 mm, and a width of at least 2 mm, in particular at least 2.5 mm.
  • the elongated holes can be introduced into the skin by stamping or punching.
  • the elongated holes penetrating the skin can thus be introduced into the skin in a technically simple manner.
  • a reliable and, moreover, flexible method can also be created if the elongated holes are introduced into the skin by means of laser radiation.
  • Laser radiation from a CO2 laser for example, can preferably be used in this case.
  • the laser radiation has a wavelength of 400 nm to 15,000 nm.
  • the wavelength of the laser radiation is particularly preferably approximately 10,600 nm. A particularly reliable method can be created in this way.
  • the reliability of the method can be further improved if the laser radiation is adapted to the respective material properties of the skin in the area of insertion during the insertion of the elongated holes. Due to varying material properties of the skin, such as moisture content, thickness, density, etc., the laser radiation can affect the respective skin area differently and thus lead to an inhomogeneous cross-section or no holes that completely penetrate the skin. By adapting the laser radiation to the local material properties, this effect can be compensated and a constant quality can be achieved when making the elongated holes in the skin. As a result, the tendency to form fraying at the interfaces can also be reduced, for example, and thus the tendency to the holes to grow over in further process steps can also be reduced.
  • the adaptation of the laser radiation to the respective material properties of the skin in the area of insertion can be carried out particularly easily and reliably if a control circuit for adapting the laser radiation is provided in the method, the control circuit being equipped with at least one measuring device for determining the material properties of the skin in the area of the contribution is connected.
  • the control loop can be coupled to a moisture measurement and/or thickness measurement and/or density measurement, and can control the laser radiation as a function of the moisture, thickness and/or density.
  • the identification code can be recorded with a camera to identify the skin.
  • the identification code captured by the camera can be fed, for example, to a computing unit connected to the camera in order to ensure reliable recognition of the identification code.
  • the hide can be passed under the camera on a moving conveyor belt for reliable recording of the identification code.
  • the skin can be placed on a table under the camera to capture the identification code with the camera.
  • the identification code processed and recognized by the processing unit can be assigned to a skin. After identification, the skin can, for example, be fed fully automatically to a further processing step.
  • a complete target processing sequence can be stored in the processing unit for each identification code, so that the next processing step can be controlled further at any point in the processing process depending on the identification code detected by the camera.
  • the hide 1 shows a schematic view of a hide 1 in which an identification code 2 was provided in a first method step of the method for marking and identifying the hide 1 according to the invention.
  • the hide 1 is, for example, a rawhide for leather production.
  • the identification code 2 has holes 3 which penetrate the skin 1 completely.
  • the holes 3 are arranged in a specific way relative to one another, so that they form the identification code 2 .
  • the holes 3 are designed as oblong holes 3.1, 3.2, which each extend along their longitudinal directions 4.1, 4.2.
  • At least first elongated holes 3.1 and second elongated holes 3.2 are provided, the first elongated holes 3.1 being arranged with their longitudinal directions 4.1 normal to the second elongated holes 3.2 with their longitudinal directions 4.2.
  • the arrangement of the first and second elongated holes 3.1, 3.2 with their longitudinal directions 4.1, 4.2 perpendicular to one another can in particular reliably prevent clogging of the holes 3 along the collagen fiber direction 11 of the skin 1, since at least one of the longitudinal directions 4.1, 4.2 essentially does not coincide with the collagen fiber direction 11 of the skin 1.
  • Fig. 1 shows a detailed schematic view of a part of the identification code 2 from Fig 1 according to the above description, which was introduced into the skin 1 according to the method according to the invention.
  • the elongated holes 3.1, 3.2 have in particular a substantially rectangular shape.
  • the elongated holes 3.1, 3.2 can also be designed with rounded corners.
  • the elongated holes 3.1, 3.2 have a ratio between length 8 and width 9 of at least 2. In preferred embodiment variants, the ratio between length 8 and width 9 is at least 2.5.
  • the elongated holes 3.1, 3.2 are introduced into the skin 1 along their respective longitudinal direction 4.1, 4.2 at a distance 10 of at least 0.5 times their length 8. In a preferred embodiment, the elongated holes 3.1, 3.2 are introduced into the skin 1 at a distance 10 of at least 0.75 times their length 8.
  • the elongated holes 3.1, 3.2 in the variant shown have a length 8 of at least 4 mm, in a preferred variant of at least 5 mm, and a width of at least 2 mm, in a preferred variant of at least 2.5 mm.
  • the identification code 2 introduced into the skin 1 has five rows 5.1, 5.2, 5.3, 5.4, 5.5, with the first 5.1, third 5.3 and fifth row 5.5 having first elongated holes 5.1 with a first longitudinal direction 4.1 and in the second 5.2 and fourth row 5.4 second slots 5.2 are provided with a second longitudinal direction 4.2.
  • each hole can be understood as a bit of a binary code.
  • several holes can also be made different rows 5.1, 5.2, 5.3, 5.4, 5.5 to be understood as characters of a complex character code.
  • the identification code 2 in 1 a visually readable font 6.
  • the font 6 consists of legible characters 7, which in the case of the present embodiment variant are in the form of Arabic numerals and Latin letters. This is how the in 1
  • the identification code 1 shown represents the character string "C0123456789" as an example.
  • a single character 7 of the identification code 2 out 1 is in detail 2 shown. This is the number "8".
  • the elongated holes 3.1, 3.2 can be made in the skin 1 by stamping or punching, or by comparable steps. In further embodiment variants, the elongated holes 3.1, 3.2 can already be introduced into the skin 1 in the form of the characters 7 using a typewriter or punch, either manually or automatically.
  • the elongated holes 3.1, 3.2 are preferably introduced into the skin 1 by means of laser radiation, but this is not shown in detail in the figures.
  • a method as in EP 3 269 829 A1 be used.
  • a control circuit is also preferably provided for introducing the elongated holes 3.1, 3.2 by means of laser radiation, the control circuit being connected to at least one measuring device for determining the material properties of the skin 1 in the region of the introduction 13 of the elongated holes 3.1, 3.2.
  • the control circuit and the measuring devices are also not shown in the figures.
  • the control circuit can continuously adapt the laser radiation depending on the material properties of the skin 1 in the area where the elongated holes 3.1, 3.2 are introduced, so that all elongated holes 3.1, 3.2 penetrate the skin 1 completely and thus have a homogeneous cut through the skin 1.
  • control circuit can be connected to a measuring device for determining the moisture content of the skin 1 in the area where the slotted holes 13 3.1, 3.2 are introduced.
  • the laser radiation can then be adjusted or varied accordingly, so that a homogeneous cut that completely penetrates the skin 1 is achieved.
  • the laser radiation used in the method preferably has a wavelength of 400 nm to 15,000 nm. In a particularly preferred embodiment variant, the wavelength is essentially 10,600 nm.
  • the skin is preferably passed under the camera on a moving conveyor belt in order to capture the identification code 2 with the camera.
  • the skin 1 can also be placed on a table under the camera in order to capture the identification code with the camera.
  • the identification code 2 in the skin 1 is preferably illuminated from the back while it is being captured by the camera.
  • the embodiment variant shown is provided with the identification code 2 in the neck area 12 of the skin 1 .
  • the position of the identification code 2 on the skin 1 is not critical. In other design variants, this can also be introduced in the flank or shield area.
  • the distance between the identification code 2 and the edge of the hide 1 should preferably not be less than about 100 mm.
  • FIG. 3 a photograph of an example of a skin 1 is shown.
  • An identification code 2 consisting of five rows 5.1, 5.2, 5.3, 5.4, 5.5 of elongated holes 3.1, 3.2 was introduced into the skin 1 using the method according to the invention.
  • the identification code 2 forms a human-readable font 6, which reproduces the character string "4605570030".
  • the holes 3 were made in the skin 1 by means of laser radiation, so that the holes 3 penetrate the skin 1 completely.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Manufacturing & Machinery (AREA)
  • Treatment Of Fiber Materials (AREA)
  • Measurement Of The Respiration, Hearing Ability, Form, And Blood Characteristics Of Living Organisms (AREA)
  • Laser Beam Processing (AREA)
EP20188362.6A 2020-07-29 2020-07-29 Procédé de marquage et d'identification d'une peau Withdrawn EP3945137A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP20188362.6A EP3945137A1 (fr) 2020-07-29 2020-07-29 Procédé de marquage et d'identification d'une peau
MX2021009115A MX2021009115A (es) 2020-07-29 2021-07-29 Metodo de marcar e identificar una piel.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP20188362.6A EP3945137A1 (fr) 2020-07-29 2020-07-29 Procédé de marquage et d'identification d'une peau

Publications (1)

Publication Number Publication Date
EP3945137A1 true EP3945137A1 (fr) 2022-02-02

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EP20188362.6A Withdrawn EP3945137A1 (fr) 2020-07-29 2020-07-29 Procédé de marquage et d'identification d'une peau

Country Status (2)

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EP (1) EP3945137A1 (fr)
MX (1) MX2021009115A (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1985001299A1 (fr) 1983-09-16 1985-03-28 NORDISK LA^EDERFORSKNINGSRA^oD TEKNOLOGISK INSTITU Procede de marquage de cuirs, de peaux et de materiaux similaires en forme de feuille
WO2000067966A1 (fr) * 1999-05-05 2000-11-16 Ger Elettronica S.R.L. Machine destinee a marquer par poinçonnage des peaux ou d'autres articles en forme de feuille
US20010011682A1 (en) * 1997-08-11 2001-08-09 Darryl J. Costin Material coding using lasers
CN102952906A (zh) * 2011-08-24 2013-03-06 杰尔电器有限责任公司 用于皮革冲压机的冲压头
EP3269829A1 (fr) 2016-07-13 2018-01-17 SLCR Lasertechnik GMBH Procédé et dispositif d'application d'un code sur une peau d'animal traitée ou non traitée

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1985001299A1 (fr) 1983-09-16 1985-03-28 NORDISK LA^EDERFORSKNINGSRA^oD TEKNOLOGISK INSTITU Procede de marquage de cuirs, de peaux et de materiaux similaires en forme de feuille
US20010011682A1 (en) * 1997-08-11 2001-08-09 Darryl J. Costin Material coding using lasers
WO2000067966A1 (fr) * 1999-05-05 2000-11-16 Ger Elettronica S.R.L. Machine destinee a marquer par poinçonnage des peaux ou d'autres articles en forme de feuille
CN102952906A (zh) * 2011-08-24 2013-03-06 杰尔电器有限责任公司 用于皮革冲压机的冲压头
EP3269829A1 (fr) 2016-07-13 2018-01-17 SLCR Lasertechnik GMBH Procédé et dispositif d'application d'un code sur une peau d'animal traitée ou non traitée

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MX2021009115A (es) 2022-01-31

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