CN103842590B - To the method and apparatus that product marks - Google Patents
To the method and apparatus that product marks Download PDFInfo
- Publication number
- CN103842590B CN103842590B CN201280048636.2A CN201280048636A CN103842590B CN 103842590 B CN103842590 B CN 103842590B CN 201280048636 A CN201280048636 A CN 201280048636A CN 103842590 B CN103842590 B CN 103842590B
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- width
- web1
- laser beam
- fluorescent material
- dot1
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
- B41M5/00—Duplicating or marking methods; Sheet materials for use therein
- B41M5/26—Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H21/00—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties
- D21H21/14—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties characterised by function or properties in or on the paper
- D21H21/40—Agents facilitating proof of genuineness or preventing fraudulent alteration, e.g. for security paper
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
- B41M3/00—Printing processes to produce particular kinds of printed work, e.g. patterns
- B41M3/14—Security printing
- B41M3/142—Security printing using chemical colour-formers or chemical reactions, e.g. leuco-dye/acid, photochromes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
- B41M5/00—Duplicating or marking methods; Sheet materials for use therein
- B41M5/26—Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used
- B41M5/28—Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used using thermochromic compounds or layers containing liquid crystals, microcapsules, bleachable dyes or heat- decomposable compounds, e.g. gas- liberating
- B41M5/282—Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used using thermochromic compounds or layers containing liquid crystals, microcapsules, bleachable dyes or heat- decomposable compounds, e.g. gas- liberating using thermochromic compounds
- B41M5/284—Organic thermochromic compounds
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
- B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
- B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
- B42D25/30—Identification or security features, e.g. for preventing forgery
- B42D25/36—Identification or security features, e.g. for preventing forgery comprising special materials
- B42D25/378—Special inks
- B42D25/387—Special inks absorbing or reflecting ultraviolet light
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
- B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
- B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
- B42D25/40—Manufacture
- B42D25/405—Marking
- B42D25/41—Marking using electromagnetic radiation
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H21/00—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties
- D21H21/14—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties characterised by function or properties in or on the paper
- D21H21/40—Agents facilitating proof of genuineness or preventing fraudulent alteration, e.g. for security paper
- D21H21/44—Latent security elements, i.e. detectable or becoming apparent only by use of special verification or tampering devices or methods
- D21H21/48—Elements suited for physical verification, e.g. by irradiation
-
- G—PHYSICS
- G07—CHECKING-DEVICES
- G07D—HANDLING OF COINS OR VALUABLE PAPERS, e.g. TESTING, SORTING BY DENOMINATIONS, COUNTING, DISPENSING, CHANGING OR DEPOSITING
- G07D7/00—Testing specially adapted to determine the identity or genuineness of valuable papers or for segregating those which are unacceptable, e.g. banknotes that are alien to a currency
- G07D7/06—Testing specially adapted to determine the identity or genuineness of valuable papers or for segregating those which are unacceptable, e.g. banknotes that are alien to a currency using wave or particle radiation
- G07D7/12—Visible light, infrared or ultraviolet radiation
- G07D7/1205—Testing spectral properties
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
- B41M3/00—Printing processes to produce particular kinds of printed work, e.g. patterns
- B41M3/14—Security printing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
- B41M3/00—Printing processes to produce particular kinds of printed work, e.g. patterns
- B41M3/14—Security printing
- B41M3/144—Security printing using fluorescent, luminescent or iridescent effects
Landscapes
- Physics & Mathematics (AREA)
- Toxicology (AREA)
- Health & Medical Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Optics & Photonics (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Electromagnetism (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Spectroscopy & Molecular Physics (AREA)
- General Physics & Mathematics (AREA)
- Laser Beam Processing (AREA)
- Paper (AREA)
- Investigating Materials By The Use Of Optical Means Adapted For Particular Applications (AREA)
- Lasers (AREA)
Abstract
A kind of being used for produces mark (MRK1 on width (WEB1), MRK2) method, comprise and form the first part (DOT1) changed of width (WEB1) the position of the part (DOT1) changed first to reduce partly 5 fluorescent effects of width (WEB1) by the width (WEB1) that led by laser beam (LB2), wherein width (WEB1) comprises cellulose fiber peacekeeping fluorescent material, and wherein when irradiating width (WEB1) by basic white 10 visible rays (VIS0) not containing ultraviolet light (UV0), visual contrast between first part (DOT1) changed and reference portion (REF1) is less than or equal to 5%.
Description
Invention field
The present invention relates to a kind of method that product is marked.The present invention also relates to the product manufactured according to method of the present invention.The invention still further relates to a kind of equipment for marked product.
Background technology
Industrially, the demand made marks in the packaging of product and/or product can be there is.Mark can comprise various printing, cutting and embossing.Usage flag can make the forgery of product and/or copy more difficult.
Can use in the stage afterwards and hinder the mark forged and copy to identify various product.Hinder the mark forged and copy also to may be used for, such as, in the file relating to valuable brand, wherein it can hinder production and the marketing of the pirate products attempting the brand utilizing product under with no authorized.
The example forging and copy more difficult mark is made to be called copy protection paper; it can be configured to produce suitable word; such as produced the word of " bootlegging " when it such as copies, scans or faxes, the duplicate of file can not be occurred with original document.Prevent the known method copying and protect normally based on machine drilling or the embossing of paper, such as, at the calendering stage of papermaking.
Known paper document can comprise watermark to improve the visual appearance of file or to make the imitated of file become more difficult.
General introduction
A target of the present invention is to provide on paper or the upper method producing mark of cardboard width (cardboardweb).A target of the present invention is to provide the paper or cardboard width that comprise mark.A target of the present invention is to provide on paper or cardboard width produces the equipment of mark.
According to first aspect of the present invention, provide a kind of method producing paper according to claim 1 or cardboard width.
According to second aspect of the present invention, provide width according to claim 18 (web).
According to the 3rd aspect of the present invention, provide equipment according to claim 22.
Relate to forge and imitated mark to need not to be bore hole visible; In fact, when observing in indoor lighting conditions, they cannot high-visible by bore hole may be advantageously.But this mark can be visible in some manner, product can be verified based on mark.
Paper or cardboard width can comprise hidden anti-fake mark, such as, show authenticity.Hidden anti-fake mark can be only that vision is detectable under specific illumination.Particularly, only when width is by UV-irradiation, hidden anti-fake mark can by open hole detection.This width can comprise mark, and its part changed by one or more is formed, and they are optically different from the region of surrounding.Hidden part can be formed by width being exposed to laser beam.The fluorescent material can selected the intensity of laser beam, the wavelength of laser beam and contain in width, makes the fluorescent effect of the width in the position of hidden part reduce partly and not change visual color and/or the thickness of width.Hidden part also can be called as, the part such as hidden.
Particularly, can selecting fluorescent material, making when being exposed to UV laser beam, it loses its photoluminescent property, and wherein the photon of laser beam can cause the change of the chemical constitution of fluorescent material.
The energy of laser beam also can be converted into heat by absorption.The heating that fluorescent material can be configured to because the absorption of laser beam causes causes decomposing or losing its photoluminescent property.
In one embodiment, width can also comprise visible marking, and when irradiated this width by visible white light time, it easily can be detected by bore hole.Visible marking can comprise, the part such as changed, and wherein, the color of the part of described change can be different from the color of reference portion.Can carbonize to making the cellulose fibre of width that local occur the color that (that is, carbonization) changes width partly by the intensity of such as setting laser bundle is high.
Visible marking can comprise, the part such as changed, and it has the thickness different from reference portion.Visible marking can comprise, and such as hole or depression, it is formed by laser ablation.
In one embodiment, can form covert indicia by using the first laser beam, and can form visible marking by using the second laser beam, but wherein said first laser beam and the second laser beam have identical wavelength different intensity.In one embodiment, by changing the intensity of the laser obtained from laser instrument, the first laser beam and the second laser beam can be obtained from identical laser instrument.In one embodiment, by main laser bundle is divided into the first laser beam and the second laser beam, can come to be formed covert indicia and visible marking, but these two laser beams have identical wavelength different intensity substantially simultaneously.
The packaging of written document or product can comprise a part for width.Width can be cut to multi-disc, such as, to form the label of ticket or medicine.The mark produced on width by the first laser beam can be shown, such as trade name, name, date stamp or the page number.
The width of anti-fake mark can easily produce with low cost in a large number, such as, by using the paper machine being equipped with the improvement of laser marking device.In one embodiment, do not need to use extra antifake printing machine or false proof converter after producing width by the paper machine improved.Mark can be produced when moving under width is with the usual speed of paper machine.
Particularly, fluorescent material can be in the manufacture of width, join the Optical Bleaching Agent in paper or cardboard width.
If imitation personnel want to produce with original marking optically identical other mark, then he should have the knowledge of the laser parameter used when generation original marking usually.Laser parameter can be, such as intensity, burst length and wavelength.Laser parameter can be secret, makes the people wanting to copy file can need to carry out experiment test to find suitable laser parameter.If imitation personnel only obtain a piece of paper, such as he wants a piece of paper of the file forged, then he can not use described file to carry out experiment test.
Higher spatial resolution can be realized with laser beam labelling, namely produce and compare the narrower base part of conduction heating.Heat stamp is made to contact the mark that may produce and have slight smeared out boundary with width.
Accompanying drawing is sketched
Hereinafter, the present invention can be stated in greater detail with reference to the attached drawings, wherein:
Fig. 1 display comprises the top view of the width of covert indicia,
Fig. 2 a shows the 3-D view being checked width by bore hole,
Fig. 2 b shows the 3-D view being checked width by visual detector,
Fig. 3 a shows when using radiation of visible light, the top view of the visual appearance of width,
Fig. 3 b shows upon irradiation with ultraviolet light, the top view of the visual appearance of width,
Fig. 4 a indication example as, produce the strength range of dissimilar change,
Fig. 4 b indication example as, from the spectrum of light of the fractional transmission changed under ultraviolet irradiation,
Fig. 4 c indication example as, visible ray according under from the spectrum of light of the part reflection changed,
Fig. 5 indication example as, the visual contrast between the part of change and reference portion,
Fig. 6 a shows the side view of the Optical devices producing non-uniform intensity distribution,
Fig. 6 b indication example such as, non-uniform intensity distributes,
Fig. 6 c shows the top view of the first part changed of the part changed around second,
Fig. 7 a display comprises the top view of the width of visible marking and covert indicia,
Fig. 7 b is presented at the top view of visible ray according to the visual appearance of the width of figure below 7a,
Fig. 7 c is presented at the top view of the visual appearance of the width of ultraviolet lighting figure below 7a,
Fig. 8 a shows the side view of the Optical devices for generation of the first laser spots and the second laser spots,
Fig. 8 b shows the top view of the first part changed and the second part changed,
Fig. 8 c shows the side view by using diffraction element to provide the intensity distribution of change,
Fig. 9 a display comprises the top view of the width of obviously part and hidden part,
Fig. 9 b shows when using radiation of visible light, the top view of the outward appearance of the width of Fig. 9 a,
Fig. 9 c shows upon irradiation with ultraviolet light, the top view of the outward appearance of the width of Fig. 9 a,
Figure 10 display for generation of the side view of the step of paper or cardboard width,
Figure 11 shows the side view of the combination of width production equipment and laser marking device,
Figure 12 a shows the graphics of the device for the production of mark,
Figure 12 b shows the graphics of the device for the production of mark,
Figure 12 c shows several laser beams that can independently control of generation,
Figure 12 d shows the graphics of the device for the production of mark,
Figure 13 a and 13b shows in embodiments for the rough schematic view of the system of marked product,
Figure 14-16 shows the product with UV laser instrument mark,
Figure 17 display is used for the reduced graph of the UV laser apparatus of marked product according to an embodiment, and
The parent map of Figure 18 display optical brightening agent, this figure comprises the region of mark, and the chemical constitution of wherein said Optical Bleaching Agent changes.
Describe in detail
With reference to figure 1, width WEB1 can comprise the first mark MRK1, and it comprises the part DOT1 of one or more change.By being changed the structure and/or composition of width WEB1 by laser beam, mutagenic part DOT1 can be carried out.Can form to come mutagenic part DOT1 by what changed width WEB1 by laser beam.Particularly, mutagenic part DOT1 can be carried out by making with laser beam fluorescent material inactivation.The wavelength of mark laser beam can be, such as, in the scope of 180nm-400nm.Particularly, the wavelength of mark laser beam can in the scope of 180nm-380nm, such as, in the scope of 350nm-360nm.
WEB1 optionally comprises the second mark MRK2, and it comprises the part DOT2 of one or more change.Also mutagenic part DOT2 can be carried out by the structure and/or composition being changed width WEB1 by laser beam.
Mechanical structure and/or the chemical composition of width WEB1 can be changed partly by laser beam.Laser beam is passable, and such as change the color of width WEB1 partly, laser beam can make the fluorescence inactivation of width WEB1, and/or laser beam can change the light scatter properties of WEB1.Laser beam can be used from WEB1 ablator.
Width WEB1 can comprise cellulose fibre.Particularly, width WEB1 can be paper web or cardboard width.Cellulose fibre can easily absorb various additive.
By carbonizing (carbonization) cellulose fibre by laser beam heats, black, grey or brown can be formed.Can easily by the material of laser beam ablation cellulose fibre.
The cellulose fibre of width WEB1 can be native cellulose fibre.Width WEB1 can comprise native cellulose fibre.The cellulose fibre of width WEB1 can be natural plant fibre.Natural plant fibre can such as be selected from: xylon, cotton fiber, linen fiber, linen fibre (such as linen fiber), hemp, sisal fiber, tossa, kenaf, bamboo fibre and cocoanut fiber.Particularly, cellulose fibre can be selected from xylon, cotton fiber and linen fiber.In papermaking and/or when manufacturing cardboard, usually adopt these fibers.Xylon can be, such as pine cellulosic, spruce fibres and/or eucalyptus fibers.
Width WEB1 can comprise fluorescent material OB1.Fluorescent material can be applied in whole upper surface and/or the lower surface of width WEB1 substantially.Can pass through, such as spraying, curtain coating, dip-coating or brushing apply fluorescent material.Can select the chemical composition of fluorescent material, make the transisomer of fluorescent material when being exposed to laser emission be converted into cis-isomer, wherein the fluorescent effect of cis-isomer is less than the fluorescent effect of transisomer.When being exposed to laser emission (its wavelength X
0in ultraviolet region) time, the transisomer of fluorescent material OB1 can be converted into the cis-isomer of fluorescent material OB1.Fluorescent material OB1 can be, such as stilbene, cumarin or pyrazoline.
Can obtain marking laser beam from laser instrument.Laser instrument can be such as excimer laser, C02-laser instrument or fibre laser.The peak wavelength X of laser beam
0can such as, ultraviolet light range, visible-range or infrared region.
The method can comprise the part DOT1 being formed the first change by the width WEB1 that led by laser beam LB2, thus suppress the fluorescence of the fluorescent material OB1 of the part DOT1 changed from first, wherein width WEB1 comprises cellulose fiber peacekeeping fluorescent material OB1, and wherein when irradiating width WEB1 by basic white visible light VIS0 (it is not containing ultraviolet light UV0), the visual contrast ((L between the first part DOT1 changed and reference portion REF1
rEF, 1-L
1,1)/L
rEF, 1) be less than or equal to 5%.
Part DOT1, DOT2 that optical detection changes can be come by the optical property comparing the part DOT1 of change, the optical property of DOT2 and reference portion REF1.Reference portion REF1 can around the part DOT1 changed and/or DOT2.Reference portion REF1 can around the first mark MRK1 and/or second mark MRK2.The part DOT1 changed and the spacing of reference portion REF1 can be less than the size of part DOT1 on SX or SY direction of change.Particularly, the part DOT1 of change and the spacing of reference portion REF1 can equal 0 substantially.
The article ITE1 obtained by cutting a slice width WEB1 can comprise the first mark MRK1 and/or second mark MRK2.Article ITE1 can be the such as scraps of paper or paperboard plate.The size of sheet can be such as A5, A4, A3, A2, A1, A0, ANSIA, ANSIB, ANSIC, ANSID and ANSIE, as in standard ISO 216 and ANSI/ASMEY14.1 determine.Width WEB1 and article ITE1 optionally comprises and is printed on text on article ITE1 and/or image INF1 (described text can be, such as, mark " TXT1 ").By using conventional mode of printing (aniline printing, lithographic printing, ink jet printing), image and/or text can be printed on width WEB1.Article ITE1 can be such as invoice, label, quality guarantee certificate, diploma, written agreement or the packing of product.Article ITE1 optionally can be covered with adhesive.Article ITE1 can be such as label.Particularly, article ITE1 can be the label of medicine.DOT1, DOT2 of single change can have, such as basic circular or linear shape, or it can have the shape of such as letter or number.
Reference portion REF1 can represent the untouched not dynamic region of width WEB1, and it does not comprise the part of change and does not comprise the part of printing arbitrarily.Mark MRK1, MRK2, TXT1 can cover, such as, be less than 50% of (side) total surface area of width WEB1.The surface area of reference portion REF1 can be, such as, be greater than 50% of (side) total surface area of width WEB1.In one embodiment, mark MRK1, MRK2, TXT1 and can cover 20% of (side) total surface area being less than width WEB1.The surface area of reference portion REF1 can be, such as, be greater than 80% of (side) total surface area of width WEB1 respectively.
SX, SY and SZ represent orthogonal direction.Direction SZ shows in such as Fig. 2 a.
See Fig. 2 a, optical difference between part DOT1, the DOT2 of change and reference portion REF1 can be detected by irradiating width WEB1.The light irradiated can be, such as visible ray VIS0 and/or ultraviolet light UV0.When irradiating width WEB1 with visible ray VIS0 and/or ultraviolet light UV0, the optical property of DOT1, DOT2 part can be monitored by human eye E1.DOT1 and/or DOT2 part can detect by naked eyes E1, such as, by bore hole E1.Or, when being observed by human eye E1, Optical devices can be used to come auxiliary detection DOT1 and/or DOT2 part.Optical devices can be microscope such as between width WEB1 and eye E1 or optical narrow-band wave filter.Can obtain irradiating light VIS0 and/or UV0 from light source 1210 and/or 1220.Light source 1210,1220 can be such as light emitting diode, gas-discharge lamp (especially fluorescent tube) or tungsten sodium lamp.Identical light source can provide visible ray VIS0 and ultraviolet light UV0.
When irradiating width WEB1 with ultraviolet light UV0, the first part DOT1 changed can by bore hole E1 optical detection.When irradiating width WEB1 with visible ray UV0 (it is not substantially containing ultraviolet light), the first part DOT1 changed can be that bore hole is sightless substantially.The first part DOT1 changed can be called as, such as hidden part.Can by such as make the photoluminescent property of width WEB1 partly inactivation produce hidden part DOT1.When irradiating width WEB1 by ultraviolet light UV0, hidden part DOT1 can be shown as such as dark areas.The thickness of the width WEB1 on the position of hidden part DOT1 can be substantially equal with the thickness of the width WEB1 in the region of reference portion REF1.
When irradiating width WEB1 with visible ray VIS0 (it is not containing ultraviolet light), the second part DOT2 changed can optical detection.The second part DOT2 changed can be called as, such as obvious part.Obvious part DOT2 can have, such as color, and when irradiating width WEB1 with white visible light VIS0 and by naked eye, this color can be darker than the color of reference portion REF1 or shallow.Particularly, obvious part DOT2 can have black, grey or the brown that the charing due to width WEB1 is formed.Obvious part DOT2 also can be by removing the hole that formed of material or depression by laser beam from width WEB1 ablation.
Statement " can by open hole detection " can represent that the visual contrast between part DOT1, the DOT2 of change and reference portion REF1 is enough high, thus can realize the reliable detection of naked eyes.The minimum visual contrast of reliable detection can be, such as 2%.Statement " basic bore hole is sightless " can represent that the visual contrast between the part DOT1 of change and reference portion REF1 is less than the reliable restriction detected.When visual contrast lower than 2% time, DOT1 part can be substantially sightless.
When visual contrast greater than or equal to 5% time, DOT1, DOT2 part can be " be easy to detect ".When visual contrast lower than 5% time, DOT1, DOT2 part is not " easily detect ".
Can consecutive order or substantially simultaneously produce hidden part DOT1 and obvious part DOT2.The first laser beam for generation of hidden part DOT1 and the second laser beam for generation of obvious part DOT2 can be obtained from identical laser instrument 400.First laser beam and the second laser beam can have identical wavelength X
0.
When irradiating width WEB1 by visible ray VIS0 (it is not substantially containing ultraviolet light UV0), the part DOT2 of change can be detected by bore hole E1.Such as, the color of changing section DOT2 can be different from the color of reference portion REF1.Can pass through, such as the intensity of setting mark laser beam makes the cellulose fibre of width WEB be carbonized partly and produces different colors.Particularly, the color of changing section DOT2 can than the darker in color of reference portion REF1.
DOT2 part also can be the hole or sunk part that are formed by laser ablation.Reference portion REF1 can have the first thickness of width, and the part DOT2 changed can have the second thickness of width, and wherein the second thickness can be significantly less than the first thickness.
The gloss number of the part DOT2 changed can be different from the gloss number of reference portion REF1 substantially.Can pass through, such as in standard " TAPPIT480 ", the method for definition measures gloss number.DOT2 part can the glossiness visual appearance of tool and reference portion REF1 can have coarse visual appearance.DOT2 part can have coarse visual appearance and reference portion REF1 can the glossiness visual appearance of tool.
See Fig. 2 b, when irradiating width WEB1 with visible ray VIS0 and/or ultraviolet light UV0, the optical property of DOT1, DOT2 part can be monitored by optical pickocff CAM1.Optical pickocff CAM1 can be, such as imageing sensor.Such as, the digital camera head of mobile phone can be used as imageing sensor.Such as, sensor CAM1 can be digital microscope.
Optical pickocff CAM1 can be spectral selection, thus measures such as reflectance spectrum and/or fluorescence spectrum.Optical pickocff CAM1 can be arranged to detect visible ray, ultraviolet light and/or infrared light.
In one embodiment, the first mark MRK1 and/or second mark MRK2 can be court's mark (forensicmarking).The first mark MRK1 and/or second mark MRK2 can be realized on width WEB1, make when marking MRK1 and/or MRK2 at visible ray according to obviously not finding out when checking width WEB1 under VIS0 that width WEB1 even comprises at once by bore hole E1.In one embodiment, the second mark MRK2 also can be covert indicia.The second mark MRK2 can be realized, such as, make this mark only by the specific equipment of use, such as, detected by microscope.
Can realize the first mark MRK1 and/or second mark MRK2 makes them only can check by using special installation.Mark MRK1, MRK2 can comprise, such as, need by very little changing section DOT1, the DOT2 of microexamination.The information content that the first mark MRK1 and/or second mark MRK2 such as makes only to be obtained by use special installation mark can be realized.Such as, mark MRK1 and/or MRK2 can upset.Such as, mark MRK1 and/or MRK2 can upset, thus it appears as chaotic some group, wherein can encode with the alphanumeric obtaining such as being obtained by the digital image of some group described in treatment and analysis by setting data processor, described alphanumeric coding depends on the information content of described mark MRK1 and/or MRK2.The content comprised in mark MRK1 and/or MRK2 can be upset, and making only can by this information of again encoding that accesses to your password.
Fig. 3 a shows when irradiating width WEB1 with visible (white) light VIS0 (it is not containing ultraviolet light UV0), the visual appearance of the width WEB of Fig. 1.At this visible ray according under VIS0, can easily detect obvious part DOT2, and easily can see mark MRK2 by bore hole E1.The visual contrast of hidden part DOT1 can very lowly make be difficult to or cannot detect hidden part DOT1 by bore hole E1, and the first mark MRK1 can be substantially sightless under this visible ray shines VIS0.
Fig. 3 b shows when irradiating width WEB1 with ultraviolet light VIS0, the visual appearance of the width WEB of Fig. 1.Under this ultraviolet lighting UV0, hidden part DOT1 and hidden part DOT1 can be visible.The first mark MRK1 and second mark MRK2 can be easily detected by bore hole E1.Under this ultraviolet lighting UV0, the visual contrast of hidden part DOT1 can be very high, thus achieve the reliable detection of bore hole E1.
Fig. 4 a shows, such as, and the intensity limit value I of Fluorophotometry
mIN, 1, change the intensity limit value I of color
mIN, 2with the intensity limit value I causing ablation
mIN, 0.Limit value I
mIN, 0, I
mIN, 1, I
mIN, 2also threshold value can be called as.Can pass through laser beam direction width WEB1, make width WEB1 send the ability inactivation of fluorescence, the intensity of laser beam is greater than or equal to limit value I
mIN, 1.Can by laser beam direction width WEB1 being changed the color of width WEB1, the intensity of laser beam is greater than or equal to limit value I
mIN, 2.Can by laser beam direction width WEB1 be ablated off material, the intensity of laser beam is greater than or equal to limit value I
mIN, 0.Limit value I
mIN, 2can apparently higher than limit value I
mIN, 1.Limit value I
mIN, 0can apparently higher than limit value I
mIN, 2.
Can by laser beam direction width WEB1 be produced hidden part DOT1, the intensity of laser beam is greater than or equal to limit value I
mIN, 1, and lower than limit value I
mIN, 2.
Can by laser beam direction width WEB1 be produced obvious part DOT2, the intensity of laser beam is greater than or equal to restriction I
mIN, 2.
The parameter that the longitudinal axis of Fig. 4 a shows also can be duration instead of the intensity of laser pulse.Statement " inactivation of fluorescence " represents that fluorescent effect weakens.Statement " Fluorophotometry " represents that fluorescent effect weakens.
" fluorescent effect " is defined as the ratio of the quantity of the quantity of the photon of transmitting and the photon of absorption, and the wavelength of the photon wherein launched is greater than the wavelength of the photon of absorption.Fluorescent effect is also referred to as fluorescence efficiency.
Fig. 4 b shows, such as, when irradiating width WEB1 by ultraviolet light UV0 (it is not containing visible ray VIS0), and the spectrum of the light that the spectrum of the light that reference portion REF1 launches and hidden part DOT1 launch.The fluorescent effect of hidden part DOT1 can be starkly lower than the fluorescent effect of reference portion REF1.Therefore, when being observed by bore hole E1, hidden part DOT1 can look darker than reference portion REF1, makes the mark MRK1 that can be detected Fig. 1 by bore hole E1.
Fig. 4 c shows, such as, when irradiating width WEB1 with visible (white) light UV0 (it is not containing ultraviolet light UV0), the spectrum of the light of hidden part DOT1 reflection, the spectrum of the light that the spectrum of the light of obvious part DOT2 reflection and reference portion REF1 reflect.
See Fig. 5, depend on the spectral quality irradiating the spectral quality of light, the part of change, and the spectral quality of imageing sensor CAM1 or eye E1, part DOT1, the DOT2 of change can look darker or brighter than reference portion REF1.
Can by measuring the radiation of part changed, or compare by the radiation value of part that compares change and the radiation value of reference portion REF1 and/or with the reference value that stores in memory, detect the part of change.
Width WEB1 can containing have change photoluminescent property hidden change part DOT1 and there is the part DOT2 of obvious change of color of change.The part changed can make a distinction based on the spatial variations of brightness and background REF1.The part DOT1, the DOT2 that change can look darker or brighter than background REF1.
The brightness of described part is substantially directly proportional to the radiation of described part within the scope of presetted wavelength.The radiation of predetermined wavelength range equals the integration of spectral radiance in described predetermined wavelength range.When checking width WEB1 by eye E1, presetted wavelength scope can be the visible-range of 400nm-760nm wavelength.Also can observe width WEB1 by optical filter and limit presetted wavelength scope.Also presetted wavelength scope can be limited by observing width WEB1 by colour filter.Presetted wavelength scope can be limited by observing width WEB1 by narrow-band optical filter.The bandwidth of narrow-band optical filter can be such as be narrower than or equal 50nm, 20nm or 10nm.
When checking width WEB1 with optical pickocff CAM1, presetted wavelength scope can be, such as visible-range (such as, 400nm-760nm) and/or ultraviolet light range (such as, 200nm-400nm).The predetermined wavelength range of optical pickocff CAM1 can be limited by one or more optical filter.
Can select the fluorescent material OB1 contained in width WEB1, make it can carry out inactivation by heating, that is, fluorescent material can by heat inactivation.Fluorescent material can have minimum deactivation temperature T
dEACT, wherein by fluorescent material at minimum deactivation temperature T
dEACTunder in complete darkness, keep the time of 1ms that the local of the fluorescent effect of width WEB1 can be caused to reduce, the described reduction of fluorescent effect is be more than or equal to fluorescent effect initial value 5%.
Heating can cause the decomposition of fluorescent material and/or heating that fluorescent material can be caused to be converted into one or more basic non-fluorescence materials.By fluorescent material at minimum deactivation temperature T
dEACTunder in complete darkness, keep the time of 1ms can cause the minimizing of the amount of fluorescent material, described minimizing is more than or equal to 5% of the primary quantity of fluorescent material.
Be exposed to mark laser beam and temporarily the temperature of the fluorescent material OB1 contained in width WEB1 may be increased to uniform temperature, this temperature is greater than or equal to minimum deactivation temperature T
dEACT.Such as, infrared laser beam can be used to be used for local heat width WEB1 to make fluorescence inactivation.
By usage flag laser beam, also can substantially make photoluminescent property inactivation and fluorescent material OB1 need not be heated.Particularly, when forming hidden part DOT1, UV laser beam can be adopted.UV laser beam can be the pulsed beams with the pulse duration.
When forming hidden part DOT1, the wavelength of mark laser beam can in ultraviolet region, such as, in the scope of 180nm-400nm (especially the scope of 180-380nm is interior), and can the intensity of selected marker laser beam and/or pulse duration, thus make width WEB1 be exposed to described mark laser beam to cause the local of the fluorescent effect of width WEB1 to reduce, this reduction is greater than 5% of the initial fluorescence effect of width WEB1, wherein during being exposed to described mark laser beam, the temperature of fluorescent material OB1 keeps below minimum deactivation temperature T
dEACT.
Can produce width WEB1 in the paper machine, described paper machine comprises dry section and/or calendering section.The chemical composition of the fluorescent material OB1 contained in paper or cardboard width WEB1 can be selected, make fluorescent material can tolerate the high temperature of dry section and/or roll the high temperature of section and substantially do not lose its photoluminescent property.In dry section, the surface temperature of width WEB1 can be, the such as scope of 70-150 DEG C.In calendering section, the surface temperature of width WEB1 can temporarily, the such as scope of 150-250 DEG C.The chemical composition of fluorescent material can be selected, make minimum deactivation temperature T
dEACTgreater than or equal to 150 DEG C, preferably greater than or equal to 200 DEG C, or even greater than or equal to 250 DEG C.
When forming hidden part DOT1, the wavelength of mark laser beam can in ultraviolet region, such as, in the scope of 180nm-400nm, and can the intensity of selected marker laser beam and/or pulse duration, make during being exposed to mark laser beam, the temperature of fluorescent material OB1 keeps the fusing point being starkly lower than fluorescent material.
When forming hidden part DOT1, the wavelength of mark laser beam can in ultraviolet region, and can the intensity of selected marker laser beam and/or pulse duration, width WEB1 is made to be exposed to described mark laser beam, the temperature of fluorescent material OB1 is raised and is less than 10 DEG C, and the temperature of fluorescent material can remain on lower than minimum deactivation temperature T
dEACT.
Fluorescent material OB1 has specific spectral absorption in UV region.Spectral absorption can come to be represented by image curve, and this curve may have one or more spectrum peak.Can the wavelength of selected marker laser beam and/or the composition of fluorescent material, the spectral position at the peak that the basic match spectrum of wavelength marking laser beam is absorbed.Therefore, mark can be produced sooner and/or by the more low-energy laser of use.
The superiors' curve display of Fig. 5, such as, when irradiating width WEB1 by visible white light VIS0 (it is not containing ultraviolet light UV0), the brightness L on the diverse location of width WEB1
vIs, 1.Irradiate light and can have spatially uniform intensity distribution.
Brightness L is the luminous intensity of unit are reflection (or transmitting).Brightness represents the number of the luminous energy that can be detected by the eye from certain observation angle views surface.Brightness L considers the spectral sensitivity of eye.The unit of brightness can be cd/m
2(candela per unit area)." visible white light " represents when the temperature of black matrix is in the scope of 3000K-6500K, the visible light part of black body emission spectrum.When irradiating light not containing ultraviolet light, this represents that irradiating light does not contain the spectral component of any wavelength lower than 400nm.
Curve C R1 also can be interpreted as representing the weighted average of the spectral reflectance of width WEB1 on diverse location, and wherein spectral reflectance is average in the visible wavelength range of 400nm-760nm by the spectral sensitivity weighting of eye.Reference portion REF1 can have brightness value L
rEF, 1.
The part DOT2 of obvious change can quilt, such as carbonization, thus makes, when being irradiated by visible ray VIS0 and being observed by eye E1, to look it is black.The part DOT2 of obvious change can have brightness value L
2,1.
In order to reliably be detected by bore hole, the minimum-depth of the Space adjustment of brightness should be there is.The degree of depth of the Space adjustment of brightness can be called as " visual contrast ".
The contrast correlation checked by bore hole can be called as " visual contrast ".When a part visual contrast greater than or equal to 2% time, it can be considered to " bore hole is visible ".When the visual contrast of a part is less than 2%, it can be considered to " basic bore hole is sightless ".
Obvious part DOT2 equals (L relative to the visual contrast of reference portion REF1
rEF, 1-L
2,1)/L
rEF, 1.The visual contrast of obvious part DOT2 can be, such as, higher than 5%, to contribute to being detected by bore hole E1.
L
1,1represent the brightness of hidden part DOT1.Hidden part DOT1 equals (L relative to the visual contrast of reference portion REF1
rEF, 1-L
1.1)/L
rEF, 1.
When irradiating width WEB1 by visible white light VIS0 (it is not containing ultraviolet light UV0), the visual contrast (L of hidden part DOT1
rEF, 1-L
1,1)/L
rEF, 1can be such as, be less than or equal to 5%, thus make hidden part DOT1 still than, such as other mark is obviously sightless.Other mark (the mark TXT1 in such as Fig. 1) described can be in the stage below, is printed on width WEB1 by such as using conventional printing ink.
Visual contrast (the L of hidden part DOT1
rEF, 1-L
1,1)/L
rEF, 1can be, such as, be less than or equal to 2%, thus make the existence being difficult to maybe cannot detect hidden part DOT1 when irradiating width WEB1 by visible white light VIS0 (it is not containing ultraviolet light UV0).
Visual contrast (the L of hidden part DOT1
rEF, 1-L
1,1)/L
rEF, 1can be, such as, be less than or equal to 0.5%, thus make almost cannot by the existence of open hole detection to hidden part DOT1 when being irradiated width WEB1 by visible white light VIS0 (its not containing ultraviolet light UV0).
When low-down visual contrast, still such as hidden part DOT1 can be detected by imageing sensor CAM1.
Article 2 curve C R2 shows, such as, when irradiating width WEB1 by ultraviolet light UV0 (it is not containing visible ray), and the brightness L on the diverse location of width WEB1
vIS, 2.Equally in this case, brightness L
vIS, 2represent can be detected by the eye from certain observation angle views surface luminous energy number.
Width WEB1 can be initial fluorescence, wherein as the result being exposed to laser beam, and may be suppressed from hidden part DOT1 and the fluorescence from obvious part DOT2.Therefore, when being irradiated by ultraviolet light UV0 and being checked by bore hole E1, hidden part DOT1 and obvious part DOT2 may look darker than reference portion REF1.
L
rEF, 2represent the brightness of reference portion REF1.L
1,2represent the brightness of hidden part DOT.L
2,2represent the brightness of obvious part DOT1.In this case, the visual contrast of hidden part DOT1 equals (L
rEF, 2-L
1,2)/L
rEF, 2.The visual contrast of obvious part DOT2 equals (L
rEF, 2-L
2,2)/L
rEF, 2.When irradiating with ultraviolet light UV0, the visual contrast of hidden part DOT1 can be greater than 2% substantially, if the visual contrast of hidden part DOT1 is less than 2% when even irradiating with visible ray VIS0.
Fluorescence from the layer below width WEB1 may cause residual radiation L
rESI.The fluorescence of the fluorescence that peripheral part is launched and DOT1, DOT2 partial dispersion also may cause residual radiation L
rESI.
Article 3 curve C R3 shows, such as, when irradiating width WEB1 by ultraviolet light UV0 (it is not containing visible ray), and the ultra-violet radiation R on the diverse location of width WEB1
uV.Ultra-violet radiation R
uVequal the integration of spectral radiance in UV wavelength range.Radiation R can be detected by the optical pickocff CAM1 sensitive for ultraviolet wavelength
uVspatial variations.Radiation R is not detected by bore hole
uVspatial variations.Curve C R3 also can represent the spatial variations of the ultraviolet reflectance of width WEB1.
R
1,3represent the ultra-violet radiation of hidden part DOT1.R
2,3represent the ultra-violet radiation of obvious part DOT2.R
rEF, 3represent the ultra-violet radiation of reference portion REF1.In this case, the ultraviolet contrast of hidden part DOT1 equals (R
rEF, 3-R
1,3)/R
rEF, 3.The ultraviolet contrast of obvious part DOT2 equals (R
rEF, 3-R
2,3)/R
rEF, 3.Do not contrast by open hole detection ultraviolet.Width WEB1 can be monitored by the optical pickocff CAM1 monitoring ultraviolet light.(carbonization) hidden part DOT1 may have low ultraviolet light reflection, and make when being observed by UV-sensitive optical sensors CAM1, hidden part DOT1 looks darker than reference portion REF1.
By suppressing the fluorescence from hidden part DOT1 with laser beam change width WEB1.Be exposed to the chemical constitution that laser beam can change fluorescent material OB1, make this material even still Ultraviolet radiation absorbing under photoluminescent property inactivation.The ultra-violet radiation R of hidden part DOT1
1,3can lower than the ultra-violet radiation R of reference portion REF1
rEF, 3.
In one embodiment, the first fluorescent material can be converted into the second material by laser beam, and described second material has the fluorescence spectrum being different from the first material.
In one embodiment, the first fluorescent material can be converted into the second basic non-fluorescence material by laser beam.
In one embodiment, can increase by the wave-length coverage of Selective irradiation light VIS0 or maximize visual contrast.
In one embodiment, when being irradiated by white visible light, hidden part DOT1 may be sightless substantially, but when by when having the radiation of visible light of narrow band, described hidden part DOT1 may be visible.When by white light (such as, sunlight, tungsten sodium lamp) when irradiating, contrast may be such as lower than 2%, wherein when by there is the light of narrow band (such as, by using visible laser, or from light that is blue, red, green or yellow light-emitting diode) when irradiating, contrast may higher than 2%.
In one embodiment, hidden part DOT1 can be realized, thus make to be difficult to maybe cannot by only monitoring visible ray to detect, wherein can by the existence using optical pickocff CAM1 to detect hidden part DOT1, this optical pickocff CAM1 is arranged to the ultraviolet light detected from width WEB1 reflection and/or emitting fluorescence.
Fluorescent material can with shorter wavelength absorption luminous energy, and with the luminous energy of longer wavelength emission part.In one embodiment, reference portion REF1 can fluoresce, and makes it absorb visible ray and launch infrared light.In this case, can by using the existence infrared light activated optical pickocff CAM1 being detected to DOT2 part.
With reference to figure 6a-6c, 8a-8c, by providing uneven intensity distribution on the surface of width WEB1, can carry out to produce hidden part DOT1 and obvious part DOT2 substantially simultaneously.
Fig. 6 b shows, and such as, the non-uniform intensity for generation of the part of the change shown in Fig. 6 c distributes.Width WEB1 is exposed to higher than limit value I
mIN, 1but lower than limit value I
mIN2the part of intensity can be converted into hidden part DOT1 ' (see Fig. 4 a).Width WEB1 is exposed to higher than limit value I
mIN2the part of intensity can be converted into obvious part DOT2.X represents the position coordinates on SX direction.
Such as, laser marking device can provide intensity distribution, and it has the comparatively low-intensity annular region DOT1 ' of the pericentral high intensity region at laser spots SP2 and the peripheral at described laser spots SP2.Particularly, the optical aberration of focusing optics 350 can provide such intensity distribution.
According to Fig. 6 c, the laser beam LB2 provided by laser marking device can be configured to the combination substantially simultaneously producing hidden part DOT1 ' and obvious part DOT2.
Hidden part DOT1 ' can have size d1 on SX direction and obvious part DOT2 can have size d2 on SX direction.Size d2 can be, such as, be more than or equal to 2 times of size d1.Size d2 can be, such as, be more than or equal to 4 times of size d1.Size d2 can be, such as, in the scope of 2-5 times of size d1.Hidden part DOT1 ' can around obvious part DOT2.Particularly, hidden part DOT1 ' can be annular ring.
Also can such as by using diffractive optical components to realize the intensity distribution (see Fig. 8 c) needed.
Fig. 7 a shows width WEB1, and it comprises mark MRK3, itself so that comprise multiple by wider hidden part DOT1 ' around narrow obvious part DOT2.Hidden part is annular.Hidden part DOT1 ' can around obvious part DOT2.When only irradiating width WEB1 with visible ray VIS0, be difficult to maybe hidden part DOT1 ' to be detected by bore hole E1.
Fig. 7 b shows when irradiating width WEB1 with visible ray VIS0 (it is not containing ultraviolet light UV0), the visual appearance of the width WEB of Fig. 7 a.At this visible ray according under VIS0, narrow obvious part DOT2 easily can be detected.The contrast of hidden part DOT1 ' can be very low, makes to be difficult under this irradiation or hidden part DOT1 ' cannot to be detected by bore hole E1.
Fig. 7 c shows when irradiating width WEB1 with ultraviolet light UV0, the visual appearance of the width WEB of Fig. 7 a.Under this ultraviolet lighting UV0, obvious part DOT2 and hidden part DOT1 ' can be visible.Therefore, mark the point of MRK3 may look and to be greater than at visible ray according under VIS0 under ultraviolet lighting UV0.
Fig. 8 a shows, and such as, obtains the Optical devices of two independent laser spots SP2 and SP2 ' simultaneously, makes the maximum intensity of first SP2 be different from the maximum intensity of second point SP2 '.Particularly, the maximum intensity of first SP2 can apparently higher than the maximum intensity of second point SP2 '.
The main laser bundle LB0 provided by laser instrument 400 can be split and forms two or more intermediate beam LB1, LB1 ', and it is propagated in a different direction.Intermediate beam LB1, LB1 ' may be reflected to obtain two marker beam LB2, LB2 ' subsequently, and it also propagates on slightly different directions.Main beam LB0 can be produced by laser instrument 400.Intermediate beam LB1, LB1 ' is obtained by such as optical splitter 431 and reflector 432.The direction of light beam can be changed by reflector 433.Light beam can be focused on optionally by focusing optics 350.Marker beam LB2, LB2 ' can be produced substantially simultaneously.Light beam LB2, LB2 ' can be called as, such as " beamlet ".Light beam LB2, LB2 ' identical wavelength X can be had
0.
Fig. 8 b shows, such as, and the hidden DOT1 that width WEB1 is formed and obvious DOT2.Such as by using the device of Fig. 8 a or Fig. 8 c can forming section DOT1, DOT2 substantially simultaneously.Part DOT1, DOT2 can be overlapping or that be separated (that is, nonoverlapping).The spacing of DOT1, DOT2 part can be g12.The spacing of DOT1, DOT2 part can be, the g12 such as, on SX direction, on SY direction or on other direction.
See Fig. 8 c, can the light of a part of reflected beam LB12, form secondary labels light beam LB2 '.Secondary labels light beam LB2 ' can be obtained by such as Beam steering elements 351.Can place Beam steering elements 351 makes it intercept the laser beam produced by laser instrument at least partly.Beam steering elements 351 can be placed on, such as, between focusing optics 350 and width WEB1.Beam steering elements 351 can be, such as printing opacity or reflection diffraction grating.Beam steering elements 351 can be, such as printing opacity or reflection diffraction grating, it can carry out diffraction light with such as Zero-order diffractive and first-order diffraction.Can the diffractive features of selective light beam deflection element 351 energy of diffraction in first-order diffraction be made to be 10% of the energy of such as diffraction in Zero-order diffractive.In Zero-order diffractive, the light of diffraction can produce first SP2 and the light of diffraction can produce second point SP2 ' in first-order diffraction.
Beam steering elements 351 can be, such as holographic element.The diffractive features of selective light beam deflection element 351 can obtain laser spots SP2, the SP2 ' with needs (making a reservation for) shape.Described shape can be, such as annular, ellipse, rectangle, star or described shape can pictures, and such as letter or number is such.
See Fig. 9 a, the first mark MRK1 can comprise hidden part DOT, and the second mark MRK2 can comprise obvious part DOT2.Relative to obvious part DOT2, hidden part DOT1 may be substituted.Such as by using the device of Fig. 8 a or Fig. 8 c can forming section DOT1, DOT2 substantially simultaneously.
Fig. 9 b shows when irradiating width WEB1 with visible ray VIS0 (it is not containing ultraviolet light UV0), the visual appearance of the width WEB of Fig. 9 a.In this radiation of visible light VIS0, obvious part DOT2 can be easily detected, and mark MRK2 can be easily seen by bore hole E1.The visual contrast of hidden part DOT1 ' can be very low, makes to be difficult to or hidden part DOT1 ' cannot to be detected by bore hole E1.Mark MRK1 maybe cannot be detected according to being difficult under VIS0 at this visible ray.
Fig. 9 c shows when irradiating width WEB1 with ultraviolet light UV0, the visual appearance of the width WEB of Fig. 9 a.Under this ultraviolet lighting UV0, hidden part DOT1 and obvious part DOT2 can be that bore hole E1 is visible.
See Figure 10, the production of paper and cardboard width can comprise one or more following step usually:
-compacting, wherein, compacting moist cellulose web of fiber is made a return journey and is dewatered between the rolls,
-dry, wherein, from width, remove water by heating,
-calendering, wherein, by carrying out between the rolls suppressing the surface smoothing making width,
-starching, wherein, one or more starching reagent are added on width, such as, improve the mechanical strength of width,
-coating, wherein, applies width with one or more fillers, such as, produces smooth surface, to improve the optical reflection of width, and/or promotes the printing subsequently on width.
One or more hidden part DOT1 can be formed after applying fluorescent material OB1.POS1, POS2, POS3, POS4 represent the different position can carrying out marking.
Can be, such as, form part DOT1, the DOT2 of change between dry and calendering.
Can be, such as roll and add the part DOT1, the DOT2 that form change between starching.
Can be, such as add starching and add the part DOT1, the DOT2 that form change between filler.
The part DOT1, the DOT2 that change.Starching reagent can comprise such as starch, resin and/or glue.Filler can comprise, such as calcium carbonate or potter's clay.Can in the adhesive of the starch boiled and styrene-butadiene latex floating stuffing.
Can select the composition of fluorescent material OB1, make when fluorescent material is heated to above or equal the temperature of first threshold temperature, the fluorescent effect of width WEB1 obviously reduces.Can select the composition of WEB1, make when width WEB1 is heated to above or equal the temperature of Second Threshold temperature, the color of WEB1 can change.The composition of the fluorescent material contained in the composition of width WEB1 and/or width WEB1 can be selected, make first threshold temperature lower than Second Threshold temperature.Can select the composition of fluorescent material, make when the fluorescent material contained in width is exposed to laser emission, the fluorescence from width WEB1 significantly reduces.Can select the composition of fluorescent material, make when fluorescent material is exposed to ultraviolet laser radiation, the fluorescent effect of width WEB1 significantly reduces.The composition of fluorescent material can be selected, make when fluorescent material is exposed to ultraviolet laser radiation, the fluorescent effect of width WEB1 significantly reduces, and wherein can select the composition of width WEB1, makes to be exposed to the detectable change that described ultraviolet laser radiation can not cause the color of width WEB1.The composition of the fluorescent material contained in width WEB1 can be selected, make when fluorescent material is exposed to ultraviolet laser radiation, fluorescent material decomposes at least partly and/or is converted into non-fluorescence material at least partly, wherein can select the composition of width WEB1, make to be exposed to the detectable change that described ultraviolet laser radiation can not cause the color of width WEB1.
See Figure 11, laser labelling unit 500 can be comprised for the equipment 1000 processing paper web or cardboard width.Laser labelling unit 500 can be arranged to provide one or more mark laser beam LB2, it can form one or more laser spots SP2 on width WEB1.In the process producing mark MRK1, MRK2, width WEB1 can be fixing or it can speed v
1mobile.Particularly, width WEB1 can be worked as when moving with the usual amplitude velocity degree of paper machine, produce mark MRK1, MRK2.Speed v
1can in the scope of 5-50m/s.
Equipment 1000 optionally comprises additive feed unit 600, and it is configured to add fluorescent material OB1 to width WEB1.Can apply width WEB1 with additive, this additive contains fluorescent material OB1 and/or can at the forward slip value fluorescent material OB1 of width WEB1 formation and cellulose fibre.
Equipment 1000 optionally comprises, such as, for mobile width and/or the roller 1010,1020 suppressing width WEB1.Equipment 1000 can be paper machine.Equipment 1000 optionally comprises coating unit, such as, apply starching reagent.Equipment optionally comprises the cutter unit being arranged to width WEB1 be cut into multi-disc.
See Figure 12 a, laser labelling unit 500 can be arranged to provide one or more mark laser beam LB2, for changing structure and/or the chemical composition of width WEB1 partly.Laser labelling unit 500 can comprise, and is such as one or morely arranged to the beam deflection optics 100,200 of laser beam LB2 guided laser point SP2.Laser spots SP2 can be moved relative to width WEB0, thus form two-dimensional marker MRK1, MRK2.The intensity of the laser penetrated on width WEB1 can be controlled according to the position of a SP2, thus need position on mutagenic part DOT1, DOT2.
Can with speed v on SX longitudinal direction
1mobile width WEB1.Laser labelling unit 500 can provide scanning laser beam.First laser deflector 100 can be arranged in mobile laser spots SP2 on horizontal direction SY, thus two-dimensional marker MRK1 and/or MRK2 of tool size and shape in need is provided.Particularly, laser spots SP2 can be moved and make it writing period to mark MRK1 and/or MRK2, intersect for many times with vertical line YREF.
The second optional laser beam deflector 200 can be set, periodically to move laser spots SP2 on longitudinal direction SX.The use of the second laser deflector 200 can realize when width WEB1 is also can produce mark MRK1 and/or MRK2 during high-speed mobile.The speed v of width
1can in the scope of 5-50m/s.The use of the second laser deflector 200 can realize on fixing (non-moving) width, also can produce mark MRK1 and/or MRK2.
Laser labelling unit 500 can comprise, the such as first rotatable mirror 100, and it can by actuator 120 with angular velocity omega
1rotate around axle AX1.Laser labelling unit 500 can comprise, the such as second rotatable mirror 200, and it can by actuator 220 with angular velocity omega
2rotate around axle AX2.Rotatable mirror 100 can comprise one or more reflecting surface F1a, F1b.Rotatable mirror 200 can comprise one or more reflecting surface F2a, F2b.Mirror 100 and/or 200 can be the mirror polygon rotated.Laser instrument 400 can provide main beam LB0.First rotatable mirror 100 can provide intermediate beam LB1 by the light of reflected main beam LB0.Second rotatable mirror 200 can provide marker beam LB2 by the light reflecting intermediate beam LB1.Can focusing optics 350, such as lens be passed through, the light of marker beam LB2 is focused on width WEB1.
Laser labelling unit 500 can comprise control unit CNT1, and it is arranged to based on the intensity of laser spots SP2 relative to the position control laser beam LB2 of width WEB1.The intensity of laser beam LB2 can be controlled relative to the position of the reference point REF0 of movement together with width WEB1 based on laser spots SP2.
Control unit CNT1 can be arranged to provide control signal S to laser module 400 and actuator 120,220
100, S
200, S
400.Transmission of signal S can be carried out by such as cable CA1, CA2, CA3
100, S
200, S
400.
Laser marking equipment 500 can be arranged to produce and comprise a little-mark MRK1, MRK2 of matrix pattern.In other words, equipment 500 can be arranged to produce covert indicia MRK1 and/or visible marking MRK2, it comprises multiple with some DOT1, DOT2 of two-dimensional array.
See Figure 12 b, laser marking equipment 500 can comprise multiple separately controllable laser instrument.Laser marking equipment 500 can be arranged to produce and comprise a little-mark MRK1, MRK2 of matrix pattern.The quantity N of separately controllable laser instrument 400a, 400b, 400c, 400d, 400e can be, such as, in the scope of 4-10.The laser instrument of comparatively high amts can provide visually more comfortable mark.The laser instrument of lower quantity may be more cheap.
Each laser instrument 400a, 400b, 400c, 400d, 400e can provide mark laser beam LB2a, LB2b, LB2c, LB2d, LB2e.The intensity of every bar laser beam LB2a, LB2b, LB2c, LB2d, LB2e can be separately controllable, to produce multiple different point-matrix pattern.Can based on time and/or the intensity controlling every bar laser beam LB2a, LB2b, LB2c, LB2d, LB2e based on the position of the mobile reference point being fixed on width WEB1 individually.The covert indicia MRK1 produced by laser marking equipment 500 and/or visible marking MRK2 can be by, and such as 5x5 point or 7x5 point form.Covert indicia MRK1 and/or visible marking MRK2 can be, such as, be selected from the Latin alphabet of A-Z and the Arabic numerals of 0-9.
In one embodiment, laser marking equipment 500 can be arranged in speed v
1the mobile width WEB1 of movement produces mark MRK1, MRK2.In one embodiment, laser marking equipment 500 does not need to comprise any moving-member.
By the focusing optics 350 commonly used, every bar laser beam LB2a, LB2b, LB2c, LB2d, LB2e can be focused on width WEB1.Such as, or every bar laser can have oneself focusing optics, can use the first focusing optics to focus on the first light beam LB2a, and can use the second focusing optics to focus on the second light beam LB2b.
Equipment 500 can provide multiple laser spots SP2a, SP2b, SP2c, SP2d, SP2e simultaneously, makes the intensity of SP2a, SP2b, SP2c, SP2d, SP2e be separately controllable at each.
Laser marking equipment 500 see Figure 12 c, Figure 12 b or Figure 12 d also can comprise light beam-division unit, and its light being arranged through dispersion main laser bundle LBC is to produce multi-stripe laser bundle LB2a, LB2b, LB2c, LB2d, LB2e.Can by the intensity such as using high-speed regulator 420a, 420b, 420c, 420d, 420e to carry out quick adjustment every bar light beam LB2a, LB2b, LB2c, LB2d, LB2e.Main laser bundle LBC can be produced by single laser instrument 400.Laser beam LBC can be the light beam of basic continous ripple.Or laser beam LBC can form pulse with generation DOT1, DOT2 Partial synchronization.Or laser beam LBC can form pulse by certain frequency, and this frequency is apparently higher than the maximal regulated frequency of adjuster 420a, 420b, 420c, 420d, 420e.
Also in this case, the intensity of every bar light beam LB2a, LB2b, LB2c, LB2d, LB2e can be separately controllable, thus produces the point-matrix pattern needed.Contrast unit CNT1 can be set to control the intensity of light beam LB2a, LB2b, LB2c, LB2d, LB2e.
Light beam-division unit can comprise multiple beam splitter 415a, 415b, 415c, 415d.The energy split ratio of splitter 415a, 415b, 415c, 415d can be selected to make every bar light beam LB2a, LB2b, LB2c, LB2d, LB2e can have equal maximum intensity.The energy split ratio of first division device 415a can be, such as 20%/80%.The energy split ratio of the second splitter 415b can be, such as 25%/75%.The energy split ratio of tripartition device 415b can be, such as 33%/67%.The energy split ratio of quadripartion device 415b can be, such as 50%/50%.Assembly 415e can be reflector, and the energy of 100% is reflected into light beam LB2e by it.
Intensity adjustment 420a, 420b, 420c, 420d, 420e can be such as sound-optical adjuster or MEMS adjuster (namely based on the adjuster of micro-electromechanical system).By the focusing optics 350 commonly used, every bar laser beam LB2a, LB2b, LB2c, LB2d, LB2e can be focused on width WEB1.Such as, or every bar light beam can have oneself focusing optics, can use the first focusing optics to focus on the first light beam LB2a, and can use the second focusing optics to focus on the second light beam LB2b.
If the power of the main beam LBC not needing quick adjustment to be produced by laser instrument 400, the power of laser instrument 400 can significantly increase and/or the price of laser instrument 400 can significantly reduce.
See Figure 12 d, when light beam LB2a, LB2b, LB2c, LB2d, LB2e be arranged to the direction identical with width WEB1 move time, significantly can reduce the maximal regulated frequency f of marker beam LB2a, LB2b, LB2c, LB2d, LB2e
mOD.Every bar marker beam LB2a, LB2b, LB2c, LB2d, LB2e can provide laser spots SP2 on width WEB1.The longitudinal velocity of some SP2 can be different from the speed v of width WEB1 slightly
1to allow to write two-dimensional marker MRK1, MRK2.
Laser beam can be arranged to, such as, by using one or more beam deflection face F2a in rotary moving to move.Face F2a can obtain marker beam LB2a, LB2b, LB2c, LB2d, LB2e by the light of deflection intermediate beam LB1a, LB1b, LB1c, LB1d, LB1e.Particularly, beam deflection face F2a can be the reflecting surface of revolving mirror 200.Can carry out surfaces of revolution F2a by actuator 200, described actuator 200 can be such as motor.Or several can be used to move all light beam LB2a, LB2b, LB2c, LB2d, LB2e by identical face F2a simultaneously.Can by focusing optics 350 focused beam LB2a, LB2b, LB2c, LB2d, LB2e of commonly using to form laser spots.Equipment 500 can provide multiple laser spots SP2a, SP2b, SP2c, SP2d, SP2e simultaneously, makes the intensity of SP2a, SP2b, SP2c, SP2d, SP2e be separately controllable at each.The intensity of every bar light beam LB2a, LB2b, LB2c, LB2d, LB2e can be separately controllable.Each laser instrument 400a, 400b, 400c, 400d, 400e can be separately controllable.The control signal controlling beam intensity can be provided for by control unit CNT1.The signal of chain of command F2a rotation can be provided for by control unit CNT1.Control unit CNT1 can accept the position signalling from actuator 220.
Also the device of Figure 12 c can be used in the laser marking equipment 500 of Figure 12 d, such as, conventional laser instrument 410 and multiple intensity adjustment 420a, 420b, 420c, 420d, 420e can be set, instead of use several separately controllable laser instrument, separately controllable light beam LB1a, LB1b, LB1c, LB1d, LB1e are provided.
By launching the laser instrument of ultra-violet radiation, namely by the mode of so-called UV laser instrument, the chemical constitution of Optical Bleaching Agent contained in product can be changed partly.As a result, product can have first area and second area, wherein when observing under w light, looks different from not using the second area of UV laser process with the first area of UV laser process.
Multiple product can be marked by using UV laser beam.Such as, in the product comprising one or more following materials, on the position of mark, mark is produced:
-paper,
-cardboard,
-cardboard,
-plastics, and
-textiles (fabric).
The material made marks thereon can also be the stepped construction formed by such as two or more materials.Stepped construction can be formed by two or more above-mentioned materials.Stepped construction can be the formation of the paper such as using plastic coat.
Product to be marked also can be clothes or the another kind of product comprising textiles.Therefore, the manufacturer of clothes and/or fabric can provide identification marking to textiles in the factory, and wherein customs authorities relatively easily can find that product is genuine or imitated.
In one embodiment, before making mark with the coating substance not comprising Optical Bleaching Agent, coating the product of Optical Bleaching Agent can be comprised.Such coating substance can be, such as, and plastic film.In this mode, be difficult to maybe can not remove and/or destroy mark, such as machinery or by heating such as run through described plastics.
In one embodiment, product to be marked is paper, and it can by such as plastic coat.Therefore, have benefited from mark, the file with product can be verified.
Optical Bleaching Agent can be comprised in multiple product, such as, by its raw material with product to be manufactured is mixed, and/or be applied on the surface of product to be manufactured.The target comprising Optical Bleaching Agent may be the effect in order to obtain Optical Bleaching Agent, and described effect is in the product even as far as possible.In order to such object, any position in the product Optical Bleaching Agent can be provided substantially equably.
When containing when the product of Optical Bleaching Agent being formed mark, need not to product add arbitrarily other material or remove material from this product.After mark is formed, product still comprises one deck Optical Bleaching Agent on the position forming mark; Just the chemical constitution of Optical Bleaching Agent may change and makes to look with the region of laser treatment under w light and be different from untreated region.This is the point no longer reflect UV radiation because the change in the chemical constitution of Optical Bleaching Agent may cause use UV laser instrument to mark.For this reason, under w light, with the point of UV laser process may look than comprise in product there is normal chemical structure Optical Bleaching Agent, with the point of UV laser process with to comprise the point of Optical Bleaching Agent darker.
By using UV laser instrument, such as safety label and/or trade mark can be provided to product, can this product of phase authentication afterwards by which.
The use of UV laser instrument makes to provide regular (well-defined) to mark to product becomes possibility.Such as, at the product based on natural fabric, as in paper, cardboard or cardboard, the use of UV laser instrument may have superiority especially, this is that cellulose fiber peacekeeping inorganic pigment in the material does not absorb UV laser emission substantially because duration of UV laser emission is short and character that is UV laser emission causes.Therefore, except the chemical constitution of Optical Bleaching Agent, the character of product and structure can remain unchanged substantially.
In addition, the manufacturing cost of product can be lower, especially when product is containing Optical Bleaching Agent, thus does not need to add separately Optical Bleaching Agent to produce mark.
The place that labeling method need not be limited to any means or manufacture a product.The mark that will be manufactured by the method can be comprised in the product, and it is combined with the manufacture of product and/or after the manufacture of product.Such as, when paper, cardboard or cardboard, mark can be combined with the manufacture of described product, or it can make in the stage after product has manufactured.
When marking formation, need not structural deviation be produced, as hole, opening or other thinner or thicker point, but the structure of product can be made to remain unchanged.When the gross thickness of paper keeps constant, can not have problems by using the identical process equipment of paper machine to carry out converted paper, described equipment does not have markd paper grade accordingly for processing.In the corresponding way, risk is not caused by special chemical thing usually, and the formation due to mark does not need to use specified chemical thing, and described chemicals are generally used for, such as, in the safety paper of copy protection.
Employ the following drawings mark:
1 product, it contains Optical Bleaching Agent before formation mark,
2UV laser aid,
2aUV laser beam,
3 contain Optical Bleaching Agent and have the product in the region marked by UV laser instrument,
3a contains Optical Bleaching Agent and has the product in the region marked by UV laser instrument, the photo taken under natural daylight,
3b contains Optical Bleaching Agent and has the product in the region marked by UV laser instrument, the photo taken under w light,
4 containing product or the raw material of Optical Bleaching Agent,
5 Optical Bleaching Agents;
20a, 20b, 20c lens,
The mirror of 21 band y-axles,
22 for the motor of the mirror with y-axle,
The mirror of 23 band x-axles, and
24 for the motor of the mirror with x-axle.
Described method can comprise use UV laser beam 2a, to produce chemical result in the structure of Optical Bleaching Agent 5, makes the trans forms of Optical Bleaching Agent be converted into the cis form of Optical Bleaching Agent.The trans forms of Optical Bleaching Agent can be reacted under the impact of UV laser beam, makes the trans forms of Optical Bleaching Agent be converted into the cis form of Optical Bleaching Agent.The trans forms of Optical Bleaching Agent such as, by launching longer visible wavelength again, the light in blue light range, can absorb the light of short wavelength.Different from trans forms, the cis form of Optical Bleaching Agent, not such as, by launching longer visible wavelength again, the light in blue light range, absorbs the light of short wavelength.
Optical Bleaching Agent 5 can be called as, such as
-Optical Bleaching Agent, OBA,
-optics causes white dose, OWA,
-optical bleaching agent, OBA,
-fluorescence causes white dose, FWA,
Optical Bleaching Agent 5 is compounds of the similar pigment of the light of the ultraviolet range of Absorbable rod electromagnetic spectrum, and this scope is that human eye is sightless.Optical Bleaching Agent 5 can carry out launching again of light with longer wavelength scope (normally blue light range).In other words, Optical Bleaching Agent makes material look yellow less for human eye, and the whiteness that this change is interpreted as human eye increases.In addition, when the product containing Optical Bleaching Agent is exposed to UV radiation, Optical Bleaching Agent makes product " have light " under w light.Optical Bleaching Agent 5, for paper product etc., makes the paper produced have better optical property, and such as make the paper produced have bleaching effect, due to this reason, the paper of nearly all manufacture all contains Optical Bleaching Agent.Except paper product, also can use Optical Bleaching Agent to obtain the impression of " brilliant white " in textiles and detergent.
The Optical Bleaching Agent of some types is, such as two, four and six sulfonation stilbene compounds.The quantity of sulfonation group can impact for the chemical property of Optical Bleaching Agent.Some other commercially available Optical Bleaching Agents can be the chemical property based on cumarin and pyrazoline.The Optical Bleaching Agent of described type is some examples, and the mark of UV laser instrument can be suitable for the product containing other type optical brightening agent.
In one embodiment, product to be marked can comprise one or more using the chemicals of Types Below as Optical Bleaching Agent: stilbene, cumarin and pyrazoline.In these chemicals, anionic stilbene compounds may have superiority most.
UV radiation, i.e. ultra-violet radiation are the electromagnetic radiation that wavelength is shorter than the wavelength of visible ray.Ultra-violet radiation can be classified as UVA radiation, UVB radiation and UVC radiation.The wavelength of UVA radiation can be limited in the scope between 310 and 380nm (or 400nm), the wavelength of UVB radiation can be limited in the scope between 280 and 315nm, and the wavelength of UVC radiation can be limited in the scope between 100 and 280nm.In these radiation, UVA radiation has minimum energy and UVC radiation has the highest energy.Because the object of process is not produce heat significantly, low-yield UV radiation can be used in a preferred embodiment.Heat may produce harmful effect for product, such as, make paper darker and/or turn yellow.In one example in which, pending product is paper or cardboard, wherein has benefited from the mark of UV laser instrument, can avoid the change not conforming with hope caused by heat, such as, as dimmed or flavescence.
The processing time that preferred use is short, such as short effective time of laser beam on product to be marked, the negative effect possible arbitrarily processed for product quality is minimized.
In a preferred example, wave-length coverage can be used for 100nm-400nm, more preferably the UV laser instrument of 250nm-380nm.In one example in which, wave-length coverage can be used for 350nm-360nm, the UV laser instrument of such as about 355nm.In one example in which, product to be marked can contain stilbene radicals Optical Bleaching Agent, and can mark by using the UV laser instrument that wave-length coverage is 350nm-360nm.
Described method can be suitable for marking various product.Product to be marked can be by, and such as paper, cardboard, cardboard, plastics, plastic optical fibre duplexer or textiles are made.Preferably, product to be marked can be paper or cardboard, because most of paper of prior art are containing Optical Bleaching Agent.In this case, do not need to add Optical Bleaching Agent separately, but the common paper of UV laser process prior art can be used.Therefore because cellulose fibre not with the UV light generation significant reaction of the short pulse produced by UV laser instrument, can Optical Bleaching Agent be changed and substantially not change hard copy body.In other words, the process of UV light can be carried out by this way, and can not, such as make paper visually dimmed or flavescence.When paper is containing Optical Bleaching Agent, the method may be used in the paper that Optical Bleaching Agent has been applied on the surface of paper and Optical Bleaching Agent had added in the paper in paper pulp before width is formed.
When product to be marked is not in advance containing Optical Bleaching Agent, the forward direction product that can be labeled at product adds Optical Bleaching Agent.Similarly, the content of Optical Bleaching Agent may increase before the product of mark containing Optical Bleaching Agent.
Figure 13 a-13b shows the system being used for marked product 1.Figure 14-16 shows some by the product 3 with UV laser process mark.Figure 17 display has the example of the laser aid 2 being suitable for the UV laser instrument forming mark.Figure 18 shows the structure of suitable Optical Bleaching Agent 5.
Figure 13 a-13b shows with the schematic diagram simplified some embodiments marked product.Can mark in many different phases of processing.Such as, in the case of paper, can combine in the dry section of paper machine, in coiling machine (re-reeler) again, before coating, after application, with calendering, roll up with rip cutting machine (slitter-winder) combine, and package combination etc. mark.Correspondingly, when such as textiles, can be combined with the manufacture of textiles, or until provide mark on the textiles completed.
Laser aid 2 can comprise lens, such as 2-4 lens, and one or more mirror, such as 2-4 mirror, for by product 1 to be marked for laser beam direction.
In the method, the chemical constitution of Optical Bleaching Agent can be changed by this way, make the active trans forms of Optical Bleaching Agent be converted into the cis form of non-activity.In other words, by using UV laser instrument, the chemical constitution that can change Optical Bleaching Agent makes Optical Bleaching Agent be non-activity cis form from active trans forms reaction.Preferably, the mark of formation can be that human eye is sightless under indoor illumination, and it is can become visible by using the such mode of UV light.Particularly, when making identification marking on the point with little surface area, under the indoor illumination not having independent UV light, identification marking is differentiated for bore hole is almost impossible, and this product looks and do not mark on the surface.Figure 18 shows possible Optical Bleaching Agent, and can be made the mark of UV laser instrument by it, it is called stilbene-Ji Optical Bleaching Agent.In the drawings, there is the reaction from active trans forms to non-activity cis form here in the dotted line limit position of Optical Bleaching Agent 5.
The chemical constitution of Optical Bleaching Agent can be changed to form the mark marking by using the laser producing UV light.Can control well and focus on by the mark of UV laser fabrication because the conduction of such as heat usually not cause in mark fuzzy arbitrarily.In UV laser instrument mark, making mark and be not only point-device, is also quickly.Preferably, mark can be manufactured continuously, such as, as online solution.
In a preferred example, laser is so-called Nd:YAG laser (=frequency tripling NdYVo
4), its wavelength can be 355nm.
Figure 14 shows, and under w light, by the mark of UV laser fabrication, and it is sightless usually under normal indoor illumination.The codes such as mark UPM, date and bar shaped are high-visible in photo.With
150S device is taken pictures after carrying out aging 24 hours to product, and it is equivalent under sunlight about 192 hours noon in Central Europe.
Figure 15 a display is manufactured and the various bar codes of taking a picture under w light by UV laser instrument.Figure 15 b, shows successively by UV laser fabrication and the corresponding bar code of taking a picture in the sunlight.
Figure 16 shows when taking a picture at reverse side under w light, each the paper of Figure 15 a.As seen in Figure 16, when taking a picture at the reverse side marked, bar code may be that non-norm is stuck with paste.In other words, can only at side mark sheet product, as paper or cardboard, namely make by this way to mark under w light is only visible on the side of product.Or mark can be different on the not homonymy of paper product, or mark can be identical on the both sides of paper product.
It may be very difficult removal after so-called negative marker.By protecting mark to make the removal marked become even more difficult with one or more layers protective layer, such as coat in the following manner, under namely described mark stays protective layer, i.e. " in product ".For this reason, can apply with protective layer the product 3 marked by UV laser instrument after having made mark.If the product 3 of mark is paper, cardboard or cardboard, coated product can be carried out with the paper coating pigment of such as prior art.
Except the above-mentioned fact, because the device for making identification marking is special device, the such as UV laser instrument of the light of wavelength needed for emission mark product, the fraud of mark may become more difficult.Therefore, only the collection of hardware may be comparatively difficult, may need special skill, and may be expensive.And then, the advantage of described method may be need not cause the extra cost of the manufacturer of product with UV laser instrument marked product and need not slow down production, because mark even can combine with normal manufacture of product, and even do not need under many circumstances to change the normal speed used in product line.In addition, mark (such as, marking) is provided usually not need to add special or expensive material to product.Such as, when product to be marked is paper, cardboard or textiles containing Optical Bleaching Agent, the material cost of material cost and corresponding conventional products does not have significant difference.When product holding structure does not change, can not produce any problem by identical Product processing equipment converted paper, this equipment is for processing the corresponding product do not comprised by the mark of UV laser fabrication.
In one example in which, the method may be used for the paper manufacturing mark, and it can be such as safety paper.Described paper can print by any conventional technique, because this paper does not have usual by marking generation and making to print more difficult machinery or chemical property.Such as, the protrusion usually provided in the safety paper of prior art or lower point, seriously may hinder offset printing process, because the point of the integral thickness deviation of this type of and paper may stick in rubber rollers.If be added in the specialty chemical thing preventing copying conventional in such as safety paper, similar risk may be related to.
When product to be marked is paper, cardboard or cardboard, in such as paper machine or cardboard machine production line, in the upstream of the downstream of dry section and coating step, UV laser device 2 can be installed.By this way, at the run duration of paper machine/paperboard trigger, laser beam can be used to make the mark in paper/cardboard.Device 2 can be installed in, such as, extend through in the horizontal on the beam of paper or cardboard width, beam is comprised can move forward and backward the support (carriage) through paper or cardboard width.Support also can be included in the second guider that the longitudinal direction of paper or cardboard width extends, and this guider can be installed the device producing UV laser beam 2a, and its mode of installing makes it possible to move predetermined distance with the traffic direction of paper or cardboard width.Described predetermined distance can be, such as 0.5-2m.UV laser instrument also can be installed on support, described support is moveable paper or cardboard width in a lateral direction, thus make UV laser relative be that horizontal axle rotates in the traffic direction of paper web, the crosspoint of laser beam and paper or cardboard width on the traffic direction of paper or cardboard width wherein can be regulated by rotary beam.Can be realized by known method for device that is mobile and/or that rotate laser beam, as by electricity, waterpower and/or pneumatic actuation.Laser beam can be produced by using the UV laser instrument of prior art.When making mark in paper or cardboard width, can at horizontal relative to the traffic direction of paper or cardboard width and/or the vertical laser beam that moves up.During carrying out the process marked, laser beam can be, such as, move with certain speed, the speed of base paper or substrate cardboard on the direction that this speed corresponds to base paper or the movement of substrate cardboard.
In the corresponding way, UV laser device 2 also can be installed be combined with the actual product production line of each product 1 or after production line, mark other products 1.
Text or image can be formed by the mark of UV laser fabrication.Described image can be, such as, trade mark or can machine read coding, as bar code.It should be noted, product also can contain other, mark in addition, and it can make imitated more difficult.
By following example illustrating various aspects of the present invention.
The method of embodiment 1. 1 kinds of marked products (1), described product comprises Optical Bleaching Agent, and described method comprises:
-use UV laser beam to provide mark to product (1), to have an impact to the structure of Optical Bleaching Agent, the trans forms of Optical Bleaching Agent is made to be converted into the cis form of Optical Bleaching Agent, wherein, obtain the product (3) of tape label, the mark formed in product (3) can be divided into the dark-coloured point in product (3) under w light, the trans forms of Optical Bleaching Agent can absorb the light of short wavelength, and the trans forms of Optical Bleaching Agent can with the visible-range of longer wavelength utilizing emitted light again
Embodiment 2. is according to the method for embodiment 1, and wherein said product (1) comprises material listed below one or more in region to be marked:
Paper,
Cardboard,
Cardboard,
Textiles, and
Plastics.
Embodiment 3. is according to the method for embodiment 1 or 2, and wherein use UV laser instrument, its wavelength is in the scope of 100nm-400nm.
Embodiment 4. is according to any one method in embodiment 1-3, and wherein mark forms text and/or image, such as trade mark and/or can the coding that reads of machine.
Embodiment 5. is according to any one method in embodiment 1-4, and the described product (1) wherein comprising Optical Bleaching Agent had scribbled the coated agent not comprising Optical Bleaching Agent before providing mark.
Embodiment 6., according to any one method in embodiment 1-5, wherein applies described product (3) by the coated agent comprising polymer after providing mark.
Embodiment 7., according to any one method in embodiment 1-6 before, is wherein marked middle making of product (1) by the mode of UV laser instrument with the combination of product manufacturing.
The system of embodiment 8. 1 kinds for marking product, described product comprises Optical Bleaching Agent, wherein said system comprises the UV laser device (2) with UV laser instrument, the mounting means of UV laser device (2) makes the UV focus laser energy belonging to described UV laser device on product (1) to be marked, thus described UV laser can be used the chemical constitution generation effect of the Optical Bleaching Agent in described product, for marked product, the mark wherein formed can be divided into the dark-coloured point in product (3) under w light.
Embodiment 9. is according to the system of embodiment 8, and wherein UV laser device (2) is installed on the production line of product (1) to be manufactured.
The product (3) that embodiment 10. manufactures according to the method for any one in embodiment 1-7.
Target can be to provide a kind of method and system for marked product and, the product made by the method.In order to realize this target, for the principal character of the method for marked product as shown in above-described embodiment 1.Shown by system principal character for marked product is in above-described embodiment 8.Shown by product principal character is in above-described embodiment 10.
For those skilled in the art, clearly, the modifications and variations of product of the present invention, method and apparatus are known.Figure is schematic.Be illustrative with reference to the above-mentioned particular implementation of accompanying drawing and be not intended to show scope of the present invention, as appended claim define.
Claims (19)
1. one kind for producing mark (MRK1 on width (WEB1), MRK2) method, described method comprise form the first change by the described width (WEB1) that led by laser beam (LB2) part (DOT1) the position of the part (DOT1) changed described first to reduce partly the fluorescent effect of described width (WEB1), wherein said width (WEB1) comprises cellulose fiber peacekeeping fluorescent material (OB1), select the chemical composition of described fluorescent material (OB1), being exposed to laser beam by making fluorescent material (OB1) makes the transisomer of described fluorescent material be converted into the cis-isomer of described fluorescent material (OB1), be exposed to described laser beam (LB2) period, the temperature of fluorescent material (OB1) keeps below the minimum deactivation temperature (T of fluorescent material (OB1)
dEACT), the wavelength of described laser beam (LB2) is in the scope of 180-400nm, and wherein when irradiating described width (WEB1) by the white visible light (VIS0) not containing ultraviolet light (UV0), the visual contrast ((L between the described first part (DOT1) changed and reference portion (REF1)
rEF, 1-L
1,1)/L
rEF, 1) be less than or equal to 5%.
2. the method for claim 1, it is characterized in that, select the intensity of described laser beam (LB2) and the chemical composition of described fluorescent material (OB1), make to be exposed to described laser beam (LB2) and reduce the fluorescent effect of described width (WEB1) partly and do not change the color of described width (WB1).
3. method as claimed in claim 2, it is characterized in that, select intensity and/or the pulse duration of described laser beam (LB2), make the rising of the temperature of the described fluorescent material (OB1) caused by described laser beam (LB2) be less than or equal to 10 DEG C.
4. the method for claim 1, is characterized in that, the wavelength of described laser beam (LB2) and the spectral absorption peak of described fluorescent material (OB1) match.
5. the method according to any one of claim 1-4, is characterized in that, described fluorescent material (OB1) is selected from pyrazoline, cumarin and Stilbene.
6. the method according to any one of claim 1-4, it is characterized in that, described method comprises the part (DOT2) that formation second changes, when irradiating described width (WEB1) by the white visible light (VIS0) not containing ultraviolet light (UV0), the described second part (DOT2) changed can be detected by bore hole (E1).
7. method as claimed in claim 6, is characterized in that, the color of the described second part (DOT2) changed is different from the color of described reference portion (REF1).
8. method as claimed in claim 7, is characterized in that, when by naked eye, the described second part (DOT2) changed looks darker than described reference portion (REF1).
9. method as claimed in claim 6, is characterized in that, the described second part (DOT2) changed is the hole or sunk part that are formed by laser ablation.
10. method as claimed in claim 9, it is characterized in that, described reference portion (REF1) has the first thickness of described width, and the described second part (DOT2) changed has the second thickness of described width, and described second thickness is significantly less than described first thickness.
11. methods as claimed in claim 6, is characterized in that, the gloss value of the described second part (DOT2) changed is different from the gloss value of described reference portion (REF1).
12. methods as claimed in claim 6, is characterized in that, described method comprises by having the first intensity (I
mIN, 1) and first wave length (λ
0) the first laser beam (LB2, LB2') form the described first part (DOT1) changed, and by having first wave length (λ
0) and the second intensity (I
mIN, 2) the second laser beam (LB2) formed described second change part (DOT2), described second intensity (I
mIN, 2) be greater than described first intensity (I
mIN, 1).
13. methods as claimed in claim 12, is characterized in that, provide described first laser beam (LB2) and described second laser beam (LB2') by identical laser instrument (400).
14. methods as claimed in claim 6, it is characterized in that, described method comprises by being divided into by the light of main laser bundle the first beamlet (LB2') and the second beamlet (LB2) to form the described first part (DOT1) changed and the described second part (DOT2) changed simultaneously, the intensity of described first beamlet (LB2') is lower than the intensity (LB2) of described second beamlet, and described first beamlet (LB2') and described second beamlet (LB2) have identical wavelength (λ
0).
15. methods according to any one of claim 1-4, is characterized in that, are being exposed to described laser beam (LB2) period, the speed (v of described width (WEB1)
1) in the scope of 5-50m/s.
16. 1 kinds of width (WEB1) comprising cellulose fiber peacekeeping fluorescent material (OB1), described width (WEB1) also comprises the first part (DOT1) changed formed by the described width (WEB1) that led by laser beam (LB2), thus make the fluorescent effect position of the part (DOT1) changed first reducing partly described width (WEB1), wherein select the chemical composition of described fluorescent material (OB1), being exposed to laser beam (LB2) by making fluorescent material (OB1) makes the transisomer of described fluorescent material be converted into the cis-isomer of described fluorescent material (OB1), be exposed to described laser beam (LB2) period, the temperature of fluorescent material (OB1) keeps below the minimum deactivation temperature (T of fluorescent material (OB1)
dEACT), the wavelength of described laser beam (LB2) is in the scope of 180-400nm, wherein when irradiating described width (WEB1) by the white visible light (VIS0) not containing ultraviolet light (UV0), the visual contrast between the described first part (DOT1) changed of described width (WEB1) and reference portion (REF1) is less than or equal to 5%.
17. width (WEB1) as claimed in claim 16, it is characterized in that, described fluorescent material (OB1) is selected from pyrazoline, cumarin and Stilbene.
18. width (WEB1) as described in claim 16 or 17, it is characterized in that, described width also comprises the part (DOT2) of the second change, when irradiating described width (WEB1) by the white visible light (VIS0) not containing ultraviolet light (UV0), the described second part (DOT2) changed can be detected by bore hole (E1).
19. 1 kinds for producing the equipment (1000) of mark (MRK1, MRK2) on width (WEB1), described equipment (1000) comprising:
-feed unit (600), it is arranged to add fluorescent material (OB1) to paper or cardboard width (WEB1), and
-laser marking device (500), it is arranged through and laser beam (LB2) is led described width (WEB1) to form the part (DOT1) of the first change, thus on the position of the described first part (DOT1) changed, reduce the fluorescent effect of described width (WEB1) partly, wherein select the chemical composition of described fluorescent material (OB1), being exposed to laser beam (LB2) by making fluorescent material (OB1) makes the transisomer of described fluorescent material be converted into the cis-isomer of described fluorescent material (OB1), be exposed to described laser beam (LB2) period, the temperature of fluorescent material (OB1) keeps below the minimum deactivation temperature (T of fluorescent material (OB1)
dEACT), the wavelength of described laser beam (LB2) is in the scope of 180-400nm, wherein when irradiating described width (WEB1) by the white visible light (VIS0) not containing ultraviolet light (UV0), the visual contrast ((L between the described first part (DOT1) changed and reference portion (REF1)
rEF, 1-L
1,1)/L
rEF, 1) be less than or equal to 5%.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FI20115781A FI124558B (en) | 2011-08-03 | 2011-08-03 | Method and system for marking the product |
| FI20115781 | 2011-08-03 | ||
| PCT/FI2012/050765 WO2013017738A1 (en) | 2011-08-03 | 2012-08-03 | Method and apparatus for marking a product |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103842590A CN103842590A (en) | 2014-06-04 |
| CN103842590B true CN103842590B (en) | 2016-04-06 |
Family
ID=44515416
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201280048636.2A Expired - Fee Related CN103842590B (en) | 2011-08-03 | 2012-08-03 | To the method and apparatus that product marks |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP2739785B1 (en) |
| CN (1) | CN103842590B (en) |
| FI (1) | FI124558B (en) |
| WO (1) | WO2013017738A1 (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| ITTO20131074A1 (en) * | 2013-12-24 | 2015-06-25 | Cts Electronics S P A | METHOD AND DEVICE FOR MICROFOREST VERIFICATION TO VALIDATE DOCUMENTS |
| DE102014204302A1 (en) * | 2014-03-10 | 2015-09-10 | Bundesdruckerei Gmbh | Apparatus and method for checking at least one security element of a security document |
| US9907365B2 (en) | 2014-11-11 | 2018-03-06 | New Balance Athletics, Inc. | Method of providing decorative designs and structural features on an article of footwear |
| US10441033B2 (en) | 2014-11-11 | 2019-10-15 | New Balance Athletics, Inc. | Method of providing decorative designs and structural features on an article of footwear |
| FR3045907B1 (en) * | 2015-12-18 | 2019-11-22 | Oberthur Fiduciaire Sas | SECURITY ELEMENT HAVING HIDDEN INFORMATION, DOCUMENT-VALUE THAT INCLUDES IT AND DEVICE FOR VERIFYING THIS HIDDEN INFORMATION |
| ES2644261B1 (en) * | 2016-05-27 | 2018-03-15 | Macsa Id, S.A. | CONTROL PROCEDURE OF A LASER MARKING MARRIAGE SYSTEM |
| CN105839466A (en) * | 2016-06-20 | 2016-08-10 | 周凯 | Washable environmental friendly paper and preparation method thereof |
| CN106514002B (en) * | 2016-08-31 | 2018-06-19 | 广州创乐激光设备有限公司 | A kind of 3D laser marking methods applied to mark object boundary |
| PL238769B1 (en) * | 2016-10-14 | 2021-10-04 | Polska Wytwornia Papierow Wartosciowych Spolka Akcyjna | Protected document with a protecting element, method for producing the protected document and the protecting element |
| CN108466504B (en) * | 2017-02-23 | 2021-02-02 | 中钞特种防伪科技有限公司 | Optical anti-counterfeiting element and optical anti-counterfeiting product |
| US10614349B2 (en) | 2017-05-15 | 2020-04-07 | Walmart Apollo, Llc | Cloud based authentication of objects |
| DE102017008919A1 (en) * | 2017-09-22 | 2019-03-28 | Giesecke+Devrient Currency Technology Gmbh | Value document and method for producing the same |
| WO2019210436A1 (en) | 2018-05-03 | 2019-11-07 | Uster Technologies Ag | Textile brightness measurement system |
| EP3830757B1 (en) | 2018-08-01 | 2024-05-15 | Hewlett-Packard Development Company, L.P. | Covert dot patterns |
| US11281946B2 (en) | 2018-08-01 | 2022-03-22 | Hewlett-Packard Development Company, L.P. | Covert marking |
| CN109543798B (en) * | 2018-11-29 | 2021-02-02 | 深圳达闼科技控股有限公司 | Product anti-counterfeiting method and device based on spectral information and computing equipment |
| CN114467018A (en) * | 2019-11-06 | 2022-05-10 | 乌斯特技术股份公司 | Apparatus and method for optically characterizing textile samples |
| EP3875285A1 (en) * | 2020-03-06 | 2021-09-08 | Agfa Nv | Anti-counterfeiting packaging |
| DE102020111140A1 (en) * | 2020-04-23 | 2021-10-28 | Bundesdruckerei Gmbh | Method for marking by means of laser pulses |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN86100977A (en) * | 1985-02-05 | 1986-08-06 | 希巴-盖吉股份公司 | Laser marking of pigmented systems |
| GB2234601A (en) * | 1989-06-23 | 1991-02-06 | Cookson Group Plc | Imaging method |
| CN101573239A (en) * | 2006-11-07 | 2009-11-04 | 西巴控股有限公司 | Laser marking of pigmented substrates |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FI116949B (en) | 2004-09-10 | 2006-04-13 | Stora Enso Oyj | Method of marking the material, marking the material and verifying the authenticity of the product |
-
2011
- 2011-08-03 FI FI20115781A patent/FI124558B/en not_active IP Right Cessation
-
2012
- 2012-08-03 EP EP12820375.9A patent/EP2739785B1/en not_active Not-in-force
- 2012-08-03 WO PCT/FI2012/050765 patent/WO2013017738A1/en active Application Filing
- 2012-08-03 CN CN201280048636.2A patent/CN103842590B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN86100977A (en) * | 1985-02-05 | 1986-08-06 | 希巴-盖吉股份公司 | Laser marking of pigmented systems |
| GB2234601A (en) * | 1989-06-23 | 1991-02-06 | Cookson Group Plc | Imaging method |
| CN101573239A (en) * | 2006-11-07 | 2009-11-04 | 西巴控股有限公司 | Laser marking of pigmented substrates |
Also Published As
| Publication number | Publication date |
|---|---|
| EP2739785A4 (en) | 2015-02-25 |
| WO2013017738A1 (en) | 2013-02-07 |
| FI20115781A0 (en) | 2011-08-03 |
| FI124558B (en) | 2014-10-15 |
| CN103842590A (en) | 2014-06-04 |
| EP2739785B1 (en) | 2016-04-27 |
| FI20115781A (en) | 2013-02-04 |
| EP2739785A1 (en) | 2014-06-11 |
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