WO2024251676A1 - Lasermarkieren von behältern - Google Patents
Lasermarkieren von behältern Download PDFInfo
- Publication number
- WO2024251676A1 WO2024251676A1 PCT/EP2024/065227 EP2024065227W WO2024251676A1 WO 2024251676 A1 WO2024251676 A1 WO 2024251676A1 EP 2024065227 W EP2024065227 W EP 2024065227W WO 2024251676 A1 WO2024251676 A1 WO 2024251676A1
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- WO
- WIPO (PCT)
- Prior art keywords
- predetermined
- structuring
- structures
- laser
- laser marking
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Ceased
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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
- B41M5/24—Ablative recording, e.g. by burning marks; Spark recording
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
- B41J2/435—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective application of radiation to a printing material or impression-transfer material
- B41J2/44—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective application of radiation to a printing material or impression-transfer material using single radiation source per colour, e.g. lighting beams or shutter arrangements
- B41J2/442—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective application of radiation to a printing material or impression-transfer material using single radiation source per colour, e.g. lighting beams or shutter arrangements using lasers
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J3/00—Typewriters or selective printing or marking mechanisms characterised by the purpose for which they are constructed
- B41J3/407—Typewriters or selective printing or marking mechanisms characterised by the purpose for which they are constructed for marking on special material
- B41J3/4073—Printing on three-dimensional objects not being in sheet or web form, e.g. spherical or cubic objects
- B41J3/40733—Printing on cylindrical or rotationally symmetrical objects, e. g. on bottles
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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
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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
- 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
Definitions
- the invention relates to a method for marking containers.
- the invention further relates to a container.
- the invention also relates to a device for marking containers.
- Containers such as beverage containers are usually labelled using conventional labelling processes. This serves to identify and differentiate the product from competitors and to label ingredients and specify legal requirements. Additional information such as the expiration date can be applied using a laser unit.
- combinations of different technologies e.g. embossing, printing, laser marking
- a disadvantage of the known state of the art can be, for example, that the processes are relatively complex, e.g. direct printing, and thus sometimes produce high costs.
- the decoration cannot be easily customized, which is problematic for small batches and fully customized containers (batch size 1).
- the readability of the elements and the contrast can be in need of improvement.
- the invention is based on the object of creating an improved technology for marking containers, which preferably enables particularly good readability and particularly good contrast of the marking.
- One aspect of the present disclosure relates to a method for marking containers (e.g. for use in a container treatment plant).
- the method comprises laser marking a laser marking on a container (/its container surface) by means of a laser marking system (e.g. laser pulse marking system) such that a surface of the laser marking has at least one predetermined (e.g. micro and/or nano) structuring generated by the laser marking system, preferably for causing an optical (e.g. reflection) effect through the at least one predetermined structuring.
- a laser marking system e.g. laser pulse marking system
- the laser marking system can therefore advantageously laser mark a desired laser marking (laser-marked decoration), e.g. with graphics, logo and/or lettering, and additionally create targeted optical effects of the laser marking or decoration through the predetermined structure(s) of the surface.
- Further potential for improving readability and contrast lies in the targeted combination of different structures that can, for example, be adjacent to one another. Overall, this can advantageously enable greater freedom for individual design of the decoration and thus, for example, improved opportunities for differentiation from the competition.
- the at least one predetermined structure has a plurality of predetermined structures that differ structurally from one another (e.g. are differently recessed or raised), preferably for causing different optical effects (e.g. reflections) through the plurality of predetermined structures.
- This advantageously makes it possible to use the potential for improving readability and contrast through the targeted combination of different structures, with the different structures generating, for example, combinations of different reflections of incident light (e.g. combination of retroreflection, diffuse reflection and/or regular reflection).
- the plurality of predetermined structures directly adjoin one another, or a first of the plurality of predetermined structures surrounds a second of the plurality of predetermined structures (e.g. partially or completely), preferably adjacent to the second predetermined structure.
- this can significantly improve readability and contrast, since the optically produced effect changes abruptly at a boundary between the predetermined structures.
- the at least one predetermined structuring has a plurality of structures, which preferably have at least one of: being arranged regularly or irregularly; being arranged next to one another in a grid, a pattern or a line; being adjacent to one another; being structurally the same or structurally different; and being microscale or nanoscale.
- the multiple structures comprise multiple (e.g. microscale or nanoscale) honeycomb structures, multiple (e.g. microscale or nanoscale) corner reflector structures, multiple (e.g. microscale or nanoscale) lens reflector structures, multiple (e.g. microscale or nanoscale) irregular structures, multiple caterpillar-like structures, multiple interlocking or meandering structures, and/or at least one planar surface structure that is essentially planar on a microscale or nanoscale basis. This advantageously allows sections with predominantly retroreflection, diffuse reflection and/or regular reflection to be produced in a targeted manner.
- the multiple structures are each at least partially raised, preferably foamed, and/or at least partially recessed, preferably removed.
- very targeted combinations of structures can thus be created with which very specific optical effects can be achieved to improve readability and contrast.
- the at least one predetermined structure has a retroreflector structure that is designed to cause retroreflection of incident light. Retroreflection can thus advantageously be achieved as the desired optical effect in order to use it in a targeted manner in the laser marking to increase readability and contrast, in particular in combination with an adjacent regular reflector structure and/or a diffuse reflector structure.
- the retroreflector structuring comprises at least one of: a plurality of (e.g., ablated) (e.g., microscale or nanoscale) honeycomb structures; several (e.g. ablated) (e.g. microscale or nanoscale) corner reflector structures, preferably each with three reflector surfaces arranged at an angle to one another, which are arranged as a triple mirror; and several (e.g. foamed) (e.g. microscale or nanoscale) lens reflector structures, preferably in a circular shape, in a rod shape or in a caterpillar shape (e.g. curved or intertwined or meandering or wavy).
- ablated e.g., microscale or nanoscale
- corner reflector structures preferably each with three reflector surfaces arranged at an angle to one another, which are arranged as a triple mirror
- several (e.g. foamed) (e.g. microscale or nanoscale) lens reflector structures preferably in a circular shape, in a rod shape
- the honeycomb structures, corner reflector structures and/or incident light can essentially reflect as retroreflectors and thus achieve a desired optical effect in this area of the laser marking.
- the at least one predetermined structure has a regular reflector structure that is designed to bring about a regular reflection of incident light. This can advantageously achieve the desired optical effect of regular reflection in order to use it in the laser marking in a targeted manner to increase readability and contrast, in particular in combination with an adjacent retroreflector structure and/or a diffuse reflector structure.
- the regular reflector structuring has at least one planar surface structure that is essentially planar on a microscale or nanoscale.
- the planar surface structure can reflect incident light essentially regularly or directly and thus achieve a desired optical effect in this area of the laser marking.
- the at least one predetermined structuring has a diffuse reflector structuring that is designed to cause diffuse reflection of incident light.
- the diffuse reflector structuring can have several (e.g. microscale or nanoscale) irregular structures that are distributed so that an irregular, microscale or nanoscale roughened surface is preferably obtained. Diffuse reflection can thus advantageously be achieved as the desired optical effect in order to use it in a targeted manner in the laser marking to increase readability and contrast, in particular in combination with an adjacent retroreflector structuring and/or a regular reflector structuring.
- the retroreflector structure, the regular reflector structure and/or the diffuse reflector structure are directly adjacent to one another.
- the at least one structuring is produced during laser marking by at least one of: a laser beam angle of incidence on the container specifically specified for the respective predetermined structuring or a combination of different laser beam angles of incidence on the container specifically specified for the respective predetermined structuring; a laser beam intensity specifically specified for the respective predetermined structuring or a combination of different laser beam intensities specifically specified for the respective predetermined structuring; a laser beam wavelength specifically specified for the respective predetermined structuring or a combination of different laser beam wavelengths specifically specified for the respective predetermined structuring; a laser beam pulse duration specifically specified for the respective predetermined structuring or a combination of different laser beam pulse durations specifically specified for the respective predetermined structuring (particularly preferred: combination of nanosecond pulses and picosecond pulses or combination of picosecond pulses and femtosecond pulses); a spatial laser beam pulse spacing specifically
- a separate parameter set for the laser marking system can be specified for each predetermined structuring, with which the predetermined structuring can be produced reliably and repeatably.
- functional optical surfaces can also be produced efficiently with great precision.
- the method further comprises producing or treating, preferably coating, the container prior to laser marking such that at least in the Irreversibly thermochromic pigments or laser additives are introduced into the region in which the laser marking and/or the at least one predetermined structuring is laser marked, which react with a color change and/or a shading effect during laser marking.
- the desired optical effect caused by the predetermined structuring can advantageously be further enhanced, refined or differentiated by the color change or shading effect, for example in or next to the predetermined structuring.
- the method further comprises (e.g. camera-assisted) detection of the laser marking and/or the at least one predetermined structuring after the laser marking by means of a, preferably camera-assisted, inspection device, and adjusting an operation of the laser marking system and/or a container conveyor depending on the detected laser marking and/or the detected at least one predetermined structuring by means of a control device.
- the applied laser markings can advantageously be monitored in this way.
- a further aspect of the present disclosure relates to a (e.g. beverage) container, preferably a bottle or can, wherein the container has a laser marking which is produced or laser marked by means of a method as disclosed herein. It is understood that the same advantages can be achieved with the container which have already been described with reference to the method.
- a further aspect of the present disclosure relates to a device for marking containers for a container treatment plant.
- the device has a container conveyor for transporting the containers, preferably upright, and a laser marking system for laser marking the containers transported by the container conveyor.
- the device further has a control device which is configured to operate the device for carrying out a method as disclosed herein.
- the same advantages can be achieved by means of the device which have already been explained with reference to the method.
- the device can be included in a container treatment plant for producing, cleaning, coating, testing, filling, closing, equipping and/or packaging containers for pasty or liquid media, preferably beverages or liquid foodstuffs.
- the containers can be designed as bottles, cans, tubes, canisters, cartons, flacons, etc.
- control device can refer to electronics (e.g. designed as a driver circuit or with microprocessor(s) and data memory) which, depending on the design, can take on control tasks and/or regulation tasks and/or processing tasks. Even if the term “control” is used here, it can also appropriately include or mean “regulation” or “control with feedback” and/or “processing”.
- Figure 1 is a schematic representation of an exemplary device for marking containers
- Figures 2 - 4 schematic side views of containers with exemplary laser markings
- Figure 5 is a schematic plan view of a portion of a predetermined structuring
- Figure 6 is a schematic sectional view of the predetermined structuring of Figure 5;
- Figure 7 is a schematic plan view of a portion of a predetermined structuring
- Figure 8 is a schematic sectional view of the predetermined structuring of Figure 7;
- Figure 9 is a schematic plan view of a portion of a predetermined structuring
- Figure 10 is a schematic sectional view of the predetermined structuring of Figure 9;
- Figure 11 is a schematic plan view of a portion of a predetermined structuring;
- Figure 12 is a schematic sectional view of the predetermined structuring of Figure 11;
- Figure 13 is a schematic plan view of a portion of a predetermined structuring
- Figure 14 is a schematic sectional view of the predetermined structuring of Figure 13;
- Figure 15 is a schematic plan view of a portion of a predetermined structuring.
- Figure 16 is a schematic sectional view of the predetermined structuring of Figure 15.
- Figure 1 shows a device 8 for marking container 12.
- the device 8 has a laser marking system 10.
- the device 8 can further comprise a container conveyor 30.
- the device 8 can comprise an inspection device 34.
- the laser marking system 10 can laser mark containers 12 or apply a laser marking 36 to the containers 12.
- the laser marking system 10 can also be referred to as a laser marking system, laser coding system or laser inscription system.
- the laser marking system 10 can be a CO2 laser marking system, a fiber laser marking system or a UV laser marking system.
- the laser marking system 10 can be a laser pulse marking system.
- the laser marking system 10 may comprise a laser source 14 and a marking head 16.
- the laser source 14 can be designed as a laser tube, for example.
- the laser tube can be sealed.
- the laser tube can be filled with a gas, e.g. containing CO2, or a gas mixture, e.g. CO2-N2-He gas mixture.
- Electrodes can also be arranged in the laser tube.
- a supply unit can be connected to the electrodes (not shown in Figure 1).
- the supply unit can supply the laser source 14 with electrical energy.
- molecules, e.g. CO2 molecules in the laser tube can be excited to oscillate and thus to emit a laser beam.
- the laser source 14 can also be referred to as an oscillator.
- the laser beam generated by the laser source 14 can be guided or directed to the marking head 16 directly or via mirrors. It is possible that, for example, a so-called telescope for expanding the laser beam is arranged between the laser source 14 and the marking head 16.
- the marking head 16 can preferably have two movable mirrors 18 and 22 and two drives 20 and 24.
- the marking head 16 can also have a focusing device 26.
- the marking head 16 can also be referred to as a coding head, identification head or writing head.
- the first drive 20 can rotate the first mirror 18 about a first axis (e.g. x-axis).
- the first mirror 18 can also be referred to as a movable scanner mirror, e.g. X-scanner mirror.
- the second drive 24 can rotate the second mirror 22 about a second axis (e.g. y-axis).
- the second mirror 22 can also be referred to as a movable scanner mirror, e.g. Y-scanner mirror.
- the first axis and the second axis can preferably run perpendicular to one another.
- the mirrors 18, 22 moved by the drives 20, 24 can direct the laser beam according to the desired laser marking 36.
- the laser beam can thus move, for example, in a writing manner over the surface of the container 12.
- the laser beam can move over the surface of the container 12 within a marking field that is assigned to the respective marking head 16.
- the focusing device 26 can have a focusing lens for this purpose, for example.
- the focusing lens can also be referred to as a condenser lens.
- the focus The focusing lens can be, for example, an F-theta lens.
- the focusing lens can be arranged inside or outside the marking head 16.
- the focusing device 26 can also have, for example, a protective screen for protecting the focusing lens.
- the laser marking system 10 can have a plurality of marking heads 16.
- the plurality of marking heads 16 can, for example, be arranged side by side and/or one above the other. For example, two, three or more marking heads 16 can be included.
- Each marking head 16 can be connected to its own laser source 14, which can emit a laser beam to the respective marking head 16. Accordingly, the laser marking system 10 can have multiple laser sources 14.
- a beam distributor can be arranged between the laser source 14 and several marking heads 16.
- the beam distributor can, for example, split a laser beam received from the laser source 14 into several laser beams and guide them to the several marking heads 16.
- the marking heads 16 can generate or enable different laser beam incidence angles on the container 12 and/or different spatial laser beam pulse spacings on the container 12. It is also possible that a single marking head 16 can generate or enable different laser beam incidence angles on the container 12 and/or different spatial laser beam pulse spacings on the container 12.
- laser sources 14 can be of identical construction, for example. However, it is also possible for the laser sources 14 to be at least partially designed differently in order to be able to produce different effects (e.g. color effects, haptic effects, surface structures) when laser marking the containers 12.
- effects e.g. color effects, haptic effects, surface structures
- the laser sources 14 can generate laser beams with different laser beam intensities, different laser beam wavelengths and/or laser beam pulse durations. It is also possible for a single laser source 14 to be designed to generate laser beams with different laser beam intensities, different laser beam wavelengths and/or laser beam pulse durations.
- the container conveyor 30 can transport the containers 12 in one transport direction (see arrow in Figure 1).
- the container conveyor 30 can be a rotary container conveyor (container conveyor carousel).
- the container conveyor 30 can be a linear container conveyor, for example.
- the container conveyor 30 can support the containers 12 during transport, preferably on the bottom side, the circumference side and/or the mouth side.
- the container conveyor 30 can have container holders 32 for supporting the containers 12.
- the container holders 32 can hold the containers 12 preferably in base handling or neck handling.
- the container conveyor 30 does not have any separate container holders 32 and, for example, the containers 12 are simply supported on a preferably rotating conveyor element (e.g. belt, strap, chains or plates) of the container conveyor 30.
- a preferably rotating conveyor element e.g. belt, strap, chains or plates
- the container holders 32 can each support a container 12.
- the container holders 32 can each have, for example, a container plate (e.g. container turntable), a centering bell, a container clamp and/or an inflation device.
- a container 12 can be fixed between a container plate and a centering bell.
- An optional, additional inflation device can provide additional stability, e.g. when the containers 12 are marked before filling.
- the container conveyor 30 can be designed to rotate the transported containers 12 each about its own vertical axis.
- the container holders 32 can be rotatable for rotating the containers 12 about their respective vertical axis.
- the container conveyor 30 moves the containers 12 in the transport direction past the laser marking system 10 during laser marking.
- the containers 12 can be rotated by the container conveyor 30 about their own vertical axis during laser marking.
- the containers 12 can, for example, remain stationary during laser marking.
- the device 8 can also have the preferably camera-based inspection device 34.
- the inspection device 60 can detect the laser markings 36 and/or predetermined structuring(s) 38 applied to the containers 12 by the laser marking system 10 and, for example, check or evaluate them with regard to quality, dimensions, etc.
- operation of the device 8 can be adjusted, e.g. by means of a control device. For example, a container transport speed of the container conveyor 30 or a container rotation speed of the container conveyor 30 can be reduced if it is detected that the applied laser markings 36 and/or predetermined structuring 38 are incomplete, or a warning can be issued to a user via an output device.
- the laser marking 36 applied by the laser marking system 10 can, for example, have a decoration (e.g. a decorative surface), at least one character and/or a preferably single-line or multi-line character string.
- a decoration e.g. a decorative surface
- thermochromic pigments or laser additives in or on the container 12 react with a color change and/or a shading effect.
- the pigments or laser additives can be introduced into the container material during the manufacture of the containers 12.
- the container 12 can be coated on the outside with a coating that has the irreversible thermochromic pigments or laser additives before laser marking.
- chromophoric, irreversible thermochromic pigments, laser additives or similar substances can be applied to the containers 12 or incorporated into the container wall. This preparation can be carried out, for example, during container manufacture or separately, e.g. by means of coating, spraying, dipping, etc. It is also conceivable to introduce them directly into the base material of the container. In the case of PET containers, this can be done, for example, in the same way as when scavengers or permeation inhibitors are introduced, e.g. using monolayer or multilayer technology.
- the pigments, laser additives or similar substances can be characterized by being wavelength- and/or thermosensitive. This means that they can react to certain wavelengths, energy doses or irradiation times, etc.
- a special feature of the present disclosure is that a surface of the laser marking 36 of the container 12 has at least one predetermined structuring 38, which is/was generated by the laser marking or by means of the laser marking system 10, as shown purely schematically in Figures 2 to 4.
- the surface of the laser marking 36 of the container 12 of Figure 2 has three predetermined structures 38.
- the surface of the laser marking 36 of the container 12 of Figure 3 has two predetermined structures 38.
- the surface of the laser marking 36 of the container 12 of Figure 4 also has two predetermined structures 38.
- the structuring 38 is preferably a microstructuring, a nanostructuring or a combined micro-nano-structuring.
- the structuring 38 can be a functional structuring for producing an optical effect.
- the at least one structuring 38 can preferably have a retroreflector structuring 38A, 38B, 38E and/or 38F (see Figures 5 to 8 and Figures 13 to 16), a regular reflector structuring 38C (see Figures 9 and 10) and/or a diffuse reflector structuring 38D (see Figures 11 and 12).
- predetermined structures 38 can preferably differ structurally from one another. Different optical effects can thus preferably be brought about by the structures 38.
- the plurality of predetermined structures 38 can directly adjoin one another and, for example, surround one another. However, it is also possible for the structures 38 to be arranged at a distance from one another. Preferably, the structures 38 do not overlap one another.
- Each structuring 38 can have several structures 40.
- the structures 40 of a respective structuring 38 can be arranged regularly or irregularly.
- the structures 40 of a respective structuring 38 can be arranged next to one another in a grid, a pattern or a line.
- the structures 40 of a respective structuring 38 can be adjacent to one another.
- the structures 40 of a respective structuring 38 can be structurally identical or structurally different.
- the structures 40 of a respective structuring 38 can be microscale or nanoscale.
- the plurality of structures 40 can each be raised, preferably foamed, or recessed, preferably removed, or a combination thereof.
- the plurality of structures 40 with different structurings 38 can be raised to different degrees, preferably foamed to different degrees, and/or recessed to different degrees, preferably removed to different degrees, relative to one another.
- the structures 40 or the structurings 38 can be produced by an operation (parameter set) of the laser marking system 10 that is specific to the respective structuring 38.
- the laser marking system 10 can be operated by a control device depending on the structuring 38 to be produced in each case.
- a laser beam angle of incidence on the container 12 for example, a laser beam angle of incidence on the container 12, a combination of different laser beam angles of incidence on the container 12, a laser beam intensity or a combination of different laser beam intensities and/or a laser beam wavelength or a combination of different laser beam wavelengths can be specified.
- a laser beam pulse duration or a combination of different laser beam pulse durations, a spatial laser beam pulse spacing or a combination of different spatial laser beam pulse spacings and/or a temporal laser beam pulse interval or a combination of different temporal laser beam pulse intervals can also be specified specifically for the respective structuring 38.
- a focus diameter (focus spot) or a combination of different focus diameters (focus spots) can also be specified specifically for the respective predetermined structuring 38.
- Figures 5 to 8 show a retroreflector structure 38A and a retroreflector structure 38B.
- the retroreflector structure 38A, 38B can cause what is known as retroreflection of incident light.
- light can be largely reflected in the direction of incidence, i.e. in the direction from which the light came, largely independent of the direction of incidence or the angle of incidence in relation to the orientation of the retroreflector structure 38A, 38B.
- the retroreflector structure 38A may include a plurality of honeycomb or corner reflector structures 40A. Each honeycomb or corner reflector structure 40A may be configured for retroreflection.
- the corner reflector structures 40A can preferably be arranged regularly, e.g. next to one another in a grid or pattern.
- the corner reflector structures 40A can, for example, be adjacent to one another or be arranged at a distance from one another.
- the corner reflector structures 40A can preferably be structurally identical.
- the corner reflector structures 40A can preferably be microscale or nanoscale.
- the corner reflector structures 40A can be formed as depressions in the surface, preferably created by material removal caused by the laser marking system 10.
- Each honeycomb or corner reflector structure 40A can have a plurality of reflector surfaces arranged at an angle to one another. Particularly preferably, each honeycomb or corner reflector structure 40A has three reflector surfaces arranged at an angle to one another, which are arranged as a so-called triple mirror.
- laser beams or laser beam pulses can strike the surface of the container 12 at different angles of incidence.
- a different angle of incidence of the respective laser beam or laser beam pulse can be specified for each reflector surface of an angle reflector structure 40A and generated accordingly by the laser marking system 10.
- three laser beams, three laser beam pulses or three laser beam pulse bursts, each with different angles of incidence can be generated by the laser marking system 10 and strike the surface of the container 12 to produce the angle reflector structure 40A.
- the retroreflector structure 38B may include a plurality of lens reflector structures 40B. Each lens reflector structure 40B may be configured for retroreflection.
- the lens reflector structures 40B can preferably be arranged regularly, e.g. next to one another in a grid or pattern.
- the lens reflector structures 40B can, for example, be adjacent to one another or arranged at a distance from one another.
- the lens reflector structures 40B can preferably be structurally identical.
- the lens reflector structures 40B can preferably be microscale or nanoscale.
- the lens reflector structures 40B can be formed as elevations in the surface, preferably produced by foaming the (e.g. plastic) material caused by the laser marking system 10.
- Each lens reflector structure 40B may have an optical lens shape in cross section.
- the lens shape may, for example, have an ovoid shape or an approximately spherical shape.
- laser beams or laser beam pulses can strike the surface of the container 12 at the same angle of incidence, with a comparatively short irradiation time/pulse duration and/or a comparatively low laser beam intensity being selected.
- Figures 9 and 10 show a regular reflector structure 38C.
- the regular reflector structure 38C can also be referred to as a direct reflector structure.
- the regular reflector structure 38C can cause a so-called regular or direct reflection of incident light. With regular or direct reflection, incident light can be reflected at a certain angle, but not back in the direction from which the light came. Thus, the angle of incidence and the angle of reflection to the perpendicular to the incidence can preferably be the same.
- the regular reflector structuring 38C can have at least one planar surface structure 40C.
- the planar surface structure 40C can be essentially planar on a microscale or nanoscale.
- the planar surface structure 40C can preferably be formed as an extended depression in the surface, preferably created by material removal caused by the laser marking system 10.
- the extended depression can preferably have a micro- or nanoscale essentially flat bottom.
- a laser beam from the laser marking system 10 can be guided continuously and line by line over the surface of the container 12. Adjacent lines can preferably overlap.
- a plurality of laser pulses from the laser marking system 10 can strike the surface of the container 12 one after the other and next to one another. Adjacent laser pulse impact points can preferably overlap with one another.
- Figures 11 and 12 show a diffuse reflector structure 38D.
- the diffuse reflector structure 38D can cause a so-called diffuse reflection of incident light. With diffuse reflection, incident light can be reflected in various directions, so-called scattered light.
- the diffuse reflector structuring 38D can have several irregular structures 40D, resulting in a microscale or nanoscale irregularly roughened surface.
- the irregular structures 40D can preferably be arranged irregularly next to one another.
- the irregular structures 40D can, for example, be adjacent to one another or be arranged at a distance from one another.
- the irregular structures 40D are structurally different.
- the irregular structures 40D can preferably be microscale or nanoscale.
- the irregular structures 40D can be formed as depressions in the surface, preferably produced by material removal caused by the laser marking system 10. Alternatively or additionally, the irregular structures 40D can be formed as elevations in the surface, preferably produced by foaming of the (e.g. plastic) material caused by the laser marking system 10.
- laser beams or laser beam pulses can strike the surface of the container 12, for example with different angles of incidence, different intensities, different distances and/or different pulse durations, etc.
- Figures 13 to 16 show a retroreflector structure 38E and a retroreflector structure 38F, which in turn can cause a so-called retroreflection of incident light.
- the retroreflector structure 38E, 38F can have several caterpillar-shaped lens reflector structures 40E and 40F, respectively.
- the caterpillar-shaped lens reflector structures 40E, 40F can be, for example, elongated or rod-shaped (see Figures 13 and 14) or curved, wavy, curved into one another and/or meander-shaped (see Figures 15 and 16).
- Each lens reflector structure 40E, 40F can be designed for retroreflection.
- the lens reflector structures 40E, 40F can preferably be arranged regularly, e.g. next to one another in a grid or pattern and/or intertwined with one another.
- the lens reflector structures 40E, 40F can, for example, be arranged in one row or in multiple rows.
- the lens reflector structures 40E, 40F can, for example, be adjacent to one another or arranged at a distance from one another.
- the lens reflector structures 40E, 40F can preferably be structurally identical.
- the lens reflector structures 40E, 40F can preferably be microscale or nanoscale.
- the lens reflector structures 40E, 40F can preferably be formed as elevations in the surface, preferably produced by foaming the (e.g. plastic) material caused by the laser marking system 10.
- Each lens reflector structure 40E, 40F can have an optical lens shape in cross section.
- the lens shape can, for example, have an ovoid shape or an approximately spherical shape.
- laser beams can hit the surface of the container 12 at the same angle of incidence and be moved over the surfaces along a desired path.
- a comparatively short irradiation time/pulse duration and/or a comparatively low laser beam intensity can be selected.
Landscapes
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Thermal Transfer Or Thermal Recording In General (AREA)
Abstract
Description
Claims
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202480037642.0A CN121443455A (zh) | 2023-06-05 | 2024-06-03 | 对容器进行激光标记 |
| EP24730988.3A EP4719777A1 (de) | 2023-06-05 | 2024-06-03 | Lasermarkieren von behältern |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102023114694.7A DE102023114694A1 (de) | 2023-06-05 | 2023-06-05 | Lasermarkieren von Behältern |
| DE102023114694.7 | 2023-06-05 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2024251676A1 true WO2024251676A1 (de) | 2024-12-12 |
Family
ID=91376759
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/EP2024/065227 Ceased WO2024251676A1 (de) | 2023-06-05 | 2024-06-03 | Lasermarkieren von behältern |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP4719777A1 (de) |
| CN (1) | CN121443455A (de) |
| DE (1) | DE102023114694A1 (de) |
| WO (1) | WO2024251676A1 (de) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20220305812A1 (en) * | 2021-03-23 | 2022-09-29 | Kazuki FUNAHASHI | Medium, container, object-holding container, marking device, and method of manufacturing container |
| EP4101652A2 (de) * | 2021-06-08 | 2022-12-14 | Ricoh Company, Ltd. | Behälter und inhalt enthaltender körper sowie verfahren zum produzieren von behältern und behälterhproduktionsvorrichtung |
| US20230121684A1 (en) * | 2021-10-14 | 2023-04-20 | The Procter & Gamble Company | High speed laser marking on articles |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH676644A5 (de) * | 1988-08-09 | 1991-02-15 | Elpatronic Ag | |
| DE4107012C2 (de) * | 1991-03-05 | 1994-01-05 | Wild Rudolf Gmbh & Co | Verfahren zum Aufbringen und Inspizieren einer optisch lesbaren Codemarkierung und Vorrichtung hierfür |
| FR3001912B1 (fr) * | 2013-02-14 | 2015-02-27 | Sidel Participations | "procede d'obtention d'un recipient marque comportant une etape de marquage d'une preforme" |
-
2023
- 2023-06-05 DE DE102023114694.7A patent/DE102023114694A1/de active Pending
-
2024
- 2024-06-03 EP EP24730988.3A patent/EP4719777A1/de active Pending
- 2024-06-03 WO PCT/EP2024/065227 patent/WO2024251676A1/de not_active Ceased
- 2024-06-03 CN CN202480037642.0A patent/CN121443455A/zh active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20220305812A1 (en) * | 2021-03-23 | 2022-09-29 | Kazuki FUNAHASHI | Medium, container, object-holding container, marking device, and method of manufacturing container |
| EP4101652A2 (de) * | 2021-06-08 | 2022-12-14 | Ricoh Company, Ltd. | Behälter und inhalt enthaltender körper sowie verfahren zum produzieren von behältern und behälterhproduktionsvorrichtung |
| US20230121684A1 (en) * | 2021-10-14 | 2023-04-20 | The Procter & Gamble Company | High speed laser marking on articles |
Also Published As
| Publication number | Publication date |
|---|---|
| DE102023114694A1 (de) | 2024-12-05 |
| CN121443455A (zh) | 2026-01-30 |
| EP4719777A1 (de) | 2026-04-08 |
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