WO2004068519A1 - 透光性材料製のキートップへのマーキング方法、これによりマーキングしたキートップ、キーユニット、及びキーユニットの製造方法 - Google Patents
透光性材料製のキートップへのマーキング方法、これによりマーキングしたキートップ、キーユニット、及びキーユニットの製造方法 Download PDFInfo
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- WO2004068519A1 WO2004068519A1 PCT/JP2003/016770 JP0316770W WO2004068519A1 WO 2004068519 A1 WO2004068519 A1 WO 2004068519A1 JP 0316770 W JP0316770 W JP 0316770W WO 2004068519 A1 WO2004068519 A1 WO 2004068519A1
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- Prior art keywords
- key
- key unit
- resin
- characters
- symbols
- Prior art date
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H13/00—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch
- H01H13/70—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a plurality of operating members associated with different sets of contacts, e.g. keyboard
- H01H13/702—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a plurality of operating members associated with different sets of contacts, e.g. keyboard with contacts carried by or formed from layers in a multilayer structure, e.g. membrane switches
- H01H13/705—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a plurality of operating members associated with different sets of contacts, e.g. keyboard with contacts carried by or formed from layers in a multilayer structure, e.g. membrane switches characterised by construction, mounting or arrangement of operating parts, e.g. push-buttons or keys
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H13/00—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch
- H01H13/02—Details
- H01H13/12—Movable parts; Contacts mounted thereon
- H01H13/14—Operating parts, e.g. push-button
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H13/00—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch
- H01H13/70—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a plurality of operating members associated with different sets of contacts, e.g. keyboard
- H01H13/88—Processes specially adapted for manufacture of rectilinearly movable switches having a plurality of operating members associated with different sets of contacts, e.g. keyboards
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
- H01H9/18—Distinguishing marks on switches, e.g. for indicating switch location in the dark; Adaptation of switches to receive distinguishing marks
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/02—Constructional features of telephone sets
- H04M1/23—Construction or mounting of dials or of equivalent devices; Means for facilitating the use thereof
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
- H01H9/18—Distinguishing marks on switches, e.g. for indicating switch location in the dark; Adaptation of switches to receive distinguishing marks
- H01H2009/187—Distinguishing marks on switches, e.g. for indicating switch location in the dark; Adaptation of switches to receive distinguishing marks having symbols engraved or printed by laser
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H2219/00—Legends
- H01H2219/028—Printed information
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H2221/00—Actuators
- H01H2221/07—Actuators transparent
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H2229/00—Manufacturing
- H01H2229/02—Laser
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49002—Electrical device making
Definitions
- the present invention relates to an illuminated key unit useful for a mobile phone, a personal digital assistant (PDA), or other mopile device, or a display / control unit of a general device, and a process of drawing characters, symbols, and the like on each key therein.
- the present invention relates to a method for producing a key unit containing: Background art
- a key unit is a type of component that constitutes a mopile device. It is a group of multiple switch operation keys (push buttons) assembled and arranged on a single sheet surface. Each key is composed of a keypad made of a flexible rubber or a thermoplastic elastomer, and a keytop made of a hard material attached to a surface of the keypad. Switch pressing projections (so-called “push-buttons”) are formed on the back of the keypad. A plurality of keys arranged side by side are connected by a keypad. Each key is illuminated by a light source located below the keypad (called “illuminated keys”), so translucent materials are used for the keytop and keypad. An illuminated key switch is formed by, for example, bringing a circuit board with a light source provided with a switch element in close contact with the lower surface of the key unit thus configured at a position corresponding to the switch pressing projection of each key.
- an illuminated key unit To manufacture an illuminated key unit, create a key top and a keypad separately and join them together with an adhesive, or create a key top first and insert it into an injection mold.
- the keypad may be injection molded. It is necessary to draw characters, symbols, etc. that represent the functions of each key on the keytop, and this process is called “marking”. In general, marking is performed on the upper surface (also called “top surface”) or the lower surface (bottom surface) of the keytop, or inside the keytop. Of these, when performing on the top surface, it is necessary to ensure the wear resistance of the marked characters and symbols, but on the other hand, the key top may be opaque, even after joining the key top and the keypad This Can be. For bottom markings, the keytop needs to be transparent and the marking must be done before joining the keytop to the keypad. For this purpose, the contents of characters and symbols to be marked must be determined before joining.
- Patent Literature 1 relates to reduction of lead time
- Patent Literature 2 relates to provision of delivery date information by short days
- Patent Literature 3 relates to utilization of a product configuration table for each model.
- Patent Document 1 JP 2002-202805 A
- Patent Document 2 Japanese Patent Application Laid-Open No. 2002-244711
- Patent Document 3 JP 2003-015722 A
- the first problem to be solved by the present invention is that the contents of characters, symbols, etc. to be drawn on the key top can be set at any time free from restrictions from other processes in assembling the key unit. It is an object of the present invention to provide a key top which is marked in such a manner that the characters' symbols and the like drawn in the above have sufficient wear resistance, and a method for such a marking.
- the second problem to be solved by the present invention is that, when marking on the top of the key top of the illuminated key unit, the marked characters and symbols are sufficiently abrasion-resistant.
- the key is to find a material and a marking method for the key top that have the property.
- a third problem to be solved by the present invention is to find a method of manufacturing an illuminated keut that can complete the key unit in a very short time if the destination is decided. . Disclosure of the invention
- the marking method in the first problem there is a method using laser, blast, or impregnation printing.
- the problem can be solved by the method shown in FIG. 1 and FIG. That is, the laser light belonging to the near-infrared light region, visible wide region, or near-ultraviolet region having a wavelength of 1064 nm or less is intermittently radiated while being focused on a desired position inside the plastic key, and is transparent.
- This is a marking method characterized by forming a set of a large number of fine carbonized black spots or a set of whitening points due to fine cracks or the like in a plastic medium to represent characters and symbols.
- the contents of the character 'can be set at any time without being restricted by other processes in assembling the key unit.
- the following two main reasons are adopted for using laser light having a wavelength of 1064 nm or less.
- the energy of the laser beam is the same, the shorter the wavelength, the higher the energy.
- short-wavelength near-infrared light, visible light, and near-ultraviolet light can easily obtain a spot diameter of 3 O nm or less by focusing the lens. It is suitable for generation or whitening point generation by foaming (separation foaming of resin side chains).
- the marking method using a plast is performed by illuminating a key unit made by joining a glass or plastic key top on a translucent elastomer keypad.
- this blasting method may be either a mask type using a mask or a maskless type using no mask.
- the marking method by the impregnation printing method is a method of marking the top surface of the keytop or the top surface of the keytop laminated with a resin film by the impregnation printing.
- the illuminated key unit comprises: a key top having a surface coated with a multilayer film that can be printed by irradiation with laser light; a key top coated with a translucent rubber or a thermoplastic elastomer. It is bonded on a keypad (hereinafter referred to as “translucent keypad”). Then, a laser beam is applied to the top surface of the keytop to perform marking such as required characters and symbols. In this manner, the characters and symbols marked inside the multilayer film do not peel off or disappear due to friction or the like, so that excellent wear resistance is realized.
- translucent used in the present invention is used as a contrast with “complete light-shielding property” and is defined to include translucent such as colored, colorless, or milky.
- the multilayer film that can be printed by laser beam irradiation for example, the one disclosed in International Publication No. 0 230 677 (Patent Document 2) can be used.
- the pamphlet discloses a multi-layer film in which a metal vapor-deposited film is provided on the lower surface of a transparent plastic film, and a colored layer is further provided thereunder at a slight distance.
- light reflected from the colored layer or light transmitted through the colored layer from below can be used to change the shape in the metal-deposited film. This makes it visible through the top of the multilayer film (see Fig. 17).
- FIG. 1 is a conceptual diagram showing the configuration of a second-harmonic YAG laser (output of green 0.53 m) using a non-linear crystal that can be used for marking.
- FIG. 2 is a conceptual diagram illustrating a first embodiment of the present invention.
- Fig. 2 (A) is the middle layer of key top 1, (B) is the top layer of key top 1, (C) is the bottom layer of key top 1, and (D) is the bottom layer of key top 1.
- markings M are formed on a printing layer using a laser beam L, respectively.
- FIG. 3 is a block diagram generalizing and representing a flow of a common manufacturing process beyond the difference in the character forming method in each embodiment of the present invention.
- FIG. 4 is a plan view illustrating a key unit created in the “basic character formation” block S3 in the manufacturing process shown in FIG.
- FIG. 5 is a conceptual diagram illustrating steps of a marking step by an impregnation printing method on the top of the keytop in the fifth embodiment.
- Fig. 5 (A) shows the release paper 16 approaching the assembled key unit K
- Fig. 5 (B) shows the release paper 16 thermocompression-bonded to the key top 2
- C) shows a state in which the impregnation printing has been completed.
- FIG. 6 is an enlarged cross-sectional view showing a state where marking is performed on the top surface of one key top shown in FIG. 5 by the impregnation printing method.
- FIG. 7 is a diagram showing an example of characters and symbols of a specific language (Arabic) formed on the top surface of the keytop in the “language-dependent character formation” block S6 in the process shown in FIG. .
- Arabic a specific language
- FIG. 8 is a conceptual diagram illustrating the steps of a marking process on the top of the keytop by the impregnation printing method.
- FIG. 9 is an enlarged cross-sectional view showing a state where marking is performed on the top surface of one key top by the impregnation printing method.
- FIG. 10 is a block diagram showing a flow of a manufacturing process according to the method of the eighth embodiment. is there.
- FIG. 11 is a plan view of a key set created in the “assembly” block S4 during the manufacturing process.
- FIG. 12 is a conceptual diagram of a means for explaining the marking S6 by irradiating a laser beam to the top of the keytop in FIG.
- FIG. 13 is an enlarged cross-sectional view showing a state where marking is performed on the top surface of one key top by laser light irradiation.
- Fig. 14 shows examples of numbers and other characters irrelevant to the language used, and letters and symbols in a specific language (Arabic), formed on the top of the keytop.
- FIG. 15 is a plan view of a key unit created in the “assembly” block S4 (see FIG. 10) during the manufacturing process according to the ninth embodiment.
- FIG. 16 is an enlarged cross-sectional view showing a state where marking is performed by laser light irradiation on the top surface of one keytop covered with a multilayer film that can be printed by laser light irradiation.
- FIG. 17 is a conceptual diagram showing the configuration of a multilayer film that can be printed by laser light irradiation.
- FIG. 18 is a block diagram showing a flow of a manufacturing process according to the method of the tenth embodiment.
- FIG. 19 is a plan view of the key unit created in the “assembly” block S3 in the manufacturing process shown in FIG.
- FIG. 20 is a conceptual diagram illustrating a marking step on the top surface of a glass key top by a blast method.
- FIG. 21 is an enlarged cross-sectional view showing a state in which marking is performed on the top surface of one glass keytop by a blast method.
- the laser beam L is a green laser shown in FIG.
- the focal point of the laser beam L is placed at the bottom of the area (upper layer, middle layer, lower layer or printed layer) in the key top 2 where the marking M is to be formed, and the spot diameter of the green laser is set to 1 Irradiation was performed while scanning along the plane shape of the characters and symbols to be drawn, with the aperture reduced to 0 to 30 ⁇ .
- the patient moved to the plane of the next step and irradiated along the plane of the step.
- the laser beam is focused on a desired position where characters, symbols, etc. in the transparent plastic medium are to be marked.
- light energy is pulsed into the focal point of the laser light, abrupt temperature changes cause carbonization, cracking or foaming of the plastic, resulting in fine black or white spots.
- the focal point of the laser beam is moved two-dimensionally or three-dimensionally by a computer-controlled reflecting mirror system (galvano scanner) according to the design of 'characters. A set of carbonized black spots or whitening points is formed.
- a plastic key having abrasion resistance in the above-mentioned problem includes a plastic key in which characters, symbols, and the like are marked in a state floating in a plastic medium inside the key top.
- plastic key is made of, for example, a transparent polycarbonate resin, characters, symbols, and the like can be represented as a set of a number of fine carbon black spots floating in a transparent plastic medium.
- reference numeral 1 is a key pad made of silicone rubber
- 2 is a key top made of transparent polycarbonate resin
- 3 is a dome switch
- S represents a key top
- L represents a laser beam
- M represents a marking formed in the key top 2.
- Fig. 2 (A) is the middle layer of key top 2
- (B) is the top layer of key top 2
- (C) is the bottom layer of key top 2
- (D) is the back of key top 2
- marking M was applied to each printed layer.
- the marking M is formed three-dimensionally in several steps in the thickness direction of the key top.
- plastic key top 2 is made of, for example, transparent polymethyl acrylate (acrylic resin), the letters and symbols, etc., as a set of whitening points due to many fine cracks, float in the transparent plastic medium.
- transparent polymethyl acrylate acrylic resin
- a Nd: YAG laser yttrium-aluminum-garnet crystal laser doped with neodymium ions
- a Nd: YAG laser emits light having a wavelength of 106 nm, which is a fundamental wave, and a wavelength, which is a second harmonic, of 532 nm. It uses either nanometer light or light with a wavelength of 355 nanometers, which is the third harmonic.
- the device that extracts the second harmonic of the Nd: YAG laser is called a "second harmonic YAG laser” and is called a "green laser” because the generated laser light with a wavelength of 532 nm has a green color.
- Figure 1 is a conceptual diagram showing the configuration of a 2nd harmonic YAGG laser (Haruhiro Kobayashi, “Laser Story”, 1992/2/1, quoted by Nikkan Kogyo Shimbun).
- the configuration of the “third harmonic YAG laser” for extracting the third harmonic is almost the same as that shown in FIG.
- the laser device is not limited to a YAG laser.
- a glass laser and YV 0 4 laser or the like, other and solid-state laser apparatus which is doped with N d ions may be filed with an excimer laser apparatus.
- the harmonics are not limited to the second and third harmonics, and if efficiency permits, higher harmonics may be used.
- FIGS. 3 to 7 An embodiment in which an impregnation printing method is used as a marking means and a transparent resin is used as a keytop material is illustrated in FIGS. 3 to 7.
- FIG. Marking on the top of the keytop requires abrasion resistance, so a marking method that satisfies the requirement must be used. In the case of the present invention, this is the impregnation printing method.
- the printing ink penetrates to a certain depth from the surface, and realizes superior abrasion resistance compared to marking by normal printing methods such as screen printing. This is because there is no need to form a protective layer for protecting worn characters and the like from abrasion.
- polybutylene phthalate (PBT) resin is considered suitable for impregnated printing, and has excellent properties such as abrasion resistance, chemical resistance, and molding stability, and is excellent as a key top material.
- PBT polybutylene phthalate
- this resin molded product has a milky white color, there are certain restrictions, such as not being suitable for designs that allow characters printed on the back of the key top to be seen through from the top surface, and it is not always possible to use any resin. .
- PET polyethylene terephthalate
- POM polyacetal
- thermal transfer method special release paper made of plastic in which characters and symbols to be printed are drawn with a special ink into which a sublimable dye is kneaded is placed on the top surface of the keytop and pressed at a predetermined temperature for a predetermined time. Then, the paint component in the ink sublimates and evaporates, penetrates into the resin from the surface to a depth of 30 to 50 ⁇ , and the characters and symbols are fixed to the surface of the key top.
- S1 is a step of forming a keypad.
- S2 is the process of forming key tops.
- S3 is a process of writing basic characters and the like on the surface of the key top, but can be bypassed if unnecessary.
- S4 is the process of assembling the key unit by joining the keytop to the upper surface of the keypad.
- S5 is the destination, that is, the language used.
- S6 represents a step of writing language-dependent characters and the like on the top of the keytop.
- FIG. 4 is a block diagram showing a manufacturing process of the illuminated key unit K by the marking after assembly according to the present invention as described above.
- FIG. 4 is a block diagram showing the “basic character formation” in FIG. It is a top view of the key unit ⁇ created in a block.
- the key top 2 and the key pad 1 are separately formed by injection molding (S1, S 2), and the key top 2 has no relation to the language used.
- the key top 2 is joined to the key pad 3 with an adhesive or the like to form a foundation (S 4).
- the elliptical or oval shapes shown in FIG. 4 are key tops 2 made of a transparent hard resin, and basic characters 4 made up of numbers and symbols are formed on the bottom surface. These basic characters 4 are formed before the “destination determination” (S5) in the above block diagram as being irrelevant to the language used. In this state, the manufacturing process of the key cut 1 is interrupted or stopped. It will be terminated. In FIG. 4, the basic character 4 is visible through the key top 2.
- FIG. 5 is a conceptual diagram illustrating a marking process on the top surface of the keytop 2 by the impregnation printing method.
- plastic special release paper 16 on which characters and symbols are printed in advance with a sublimable ink is used. It is.
- (A) is a state in which the release paper 16 is approaching the assembled key cut K
- ( ⁇ ) is a state in which the release paper 16 is thermocompression-bonded to the key top 2
- (C) is This shows a state in which the impregnation printing of characters, symbols, etc. 5 on the top surface has been completed.
- FIG. 6 is a cross-sectional view showing an enlarged view of the state in which marking is performed on the top surface of one key top 2 by the impregnation printing method.
- the language-dependent characters etc. 5 are formed), and the printing layer (the basic characters 4 etc. are formed) formed on the bottom surface of the key tops by the thick line below the key tops.
- Fig. 7 is an example of the letter 'symbol 5 of a specific language (Arabic in the figure) formed on the top of the keytop 2 by marking after the destination is determined (formed on the bottom of the keytop 2).
- the basic character 4 that was shown looks like a cord).
- PC resin is often used as the key top of key units for mopile equipment. It is a familiar material, but its weakness is that it is an amorphous resin and its surface hardness is somewhat insufficient. Therefore, if impregnated printing is applied directly to the surface of a PC resin keytop, the impregnated ink may peel off due to wear of the resin surface.
- the surface of the key top is covered in advance with a protective coating layer having high abrasion resistance, and impregnation printing is performed from above.
- a protective coating layer having high abrasion resistance
- impregnation printing is performed from above.
- a polyurethane-atylate-based ultraviolet ray curable resin (UV coating agent) having abrasion resistance may be used.
- UV coating agent ultraviolet ray curable resin
- a method of providing a protective coat layer after impregnation printing is also conceivable.
- a method of providing a protective coat layer in advance without determining the destination is more suitable for the purpose of the present invention.
- FIGS. 8 and 9 Alternatives to the fifth and sixth embodiments are shown in FIGS. 8 and 9.
- a film of polybutylene terephthalate (PBT) resin or a film of a mixture of PBT resin and polycarbonate (PC) resin is molded into a three-dimensional shape of the key top, and another transparent resin is placed in the concave part on the back side. Filled to form a key top, key top laminated with this resin film, This is a method for manufacturing key units, which includes impregnating printing of characters and symbols on the film surface.
- PBT polybutylene terephthalate
- PC polycarbonate
- Polybutylene terephthalate (PBT) resin is considered to be one of the most suitable for impregnation printing among many resin materials. However, since the molded product of this resin has a milky white color, characters printed on the back of the key top can be seen from the top. There are certain restrictions, such as not being suitable for designs that do. However, PBT resin has excellent abrasion resistance even when it is made into a thin film, has good moldability, and can maintain its three-dimensional shape stably when formed into a three-dimensional shape by drawing. It has favorable characteristics as a film for key tops.
- the force to make the PBT resin into a thin film may be a PC resin, or a mixture of a PC resin and a polystyrene (PS) resin.
- thermal transfer method a special release paper made of plastic, in which characters to be printed and symbols etc. to be printed are drawn with a special ink into which a sublimable dye is kneaded, is placed on the top surface of the keytop and pressed at a predetermined temperature for a predetermined time. I do. Then, the paint components in the ink sublimate and vaporize, and from the surface
- the character 'symbol etc. penetrates into the resin film to a depth of 30 to 5 O / zm, and the characters and symbols are fixed to the surface of the key top.
- characters and symbols are printed directly on the top surface of the keytop using the same special ink as above by pad printing or screen printing, and then heat treatment is performed under predetermined conditions. Then, similarly to the thermal transfer method, the paint components in the ink sublimate and evaporate, penetrate into the resin, and the characters and symbols are fixed to the surface of the keytop.
- FIG. 3 is a block diagram showing a manufacturing process of the illuminated key unit K by marking after assembly according to the present invention, as described above, and FIG. It is a top view of the key unit K created in a block.
- the keytops 12 and the keypads 13 are separately formed by injection molding (Sl, S2), and the keytops 12 have numbers that are independent of the language used.
- the keytop 12 is joined to the keypad 13 with an adhesive or the like and assembled (S4).
- the oval or oval shape shown in Fig. 4 is a key top laminated with a resin film for each key.
- the basic character 4 consisting of numbers and symbols is formed on the bottom surface of the character. These basic characters 4 are formed before the "destination determination" (S5) in the above block diagram as being unrelated to the language used, and in this state, the manufacturing process of the key unit K is interrupted or terminated. . In FIG. 2, the basic character M (4) is visible through the keytop 12.
- the manufacturing process of Key Unit 1 is restarted or started, and characters, symbols, etc. that depend on the language used at the destination (language dependent)
- the letter 5 is marked on the top surface of the key top 2 (on the resin film layer 2a) by the impregnation printing method (S6).
- S6 impregnation printing method
- FIG. 8 is a conceptual diagram illustrating a marking step on the top surface of the keytop 12 by the impregnation printing method.
- the thermal transfer method which is one of the impregnation printing methods
- a special release paper 16 in which characters, symbols, and the like are preliminarily printed on a plastic film with a sublimable ink is used.
- Fig. 8 (A) shows the release paper 16 approaching the assembled keytop 12;
- Fig. 8 (B) shows the release paper 16 being thermocompressed to the keytop 12 (for example, 1 (At 50 ° C for about 5 minutes), and
- Fig. 8 (C) shows the state after the impregnation printing has been completed.
- FIG. 9 is a cross-sectional view showing an enlarged view of a state in which marking by impregnation printing has been performed on the top surface of one key top 12, and a line above the resin film 12 a is shown.
- the thickness of the printing ink that penetrates into the resin film 12a depends on the printing layer (the basic characters 4 etc.) Formed).
- Fig. 7 shows an example of the character 'symbol 5 of a specific language (Arabic in the figure) formed on the top of the keytop by marking after the destination is determined.
- the basic character 4 appears to be in the background.
- FIG. 10 is a block diagram showing a manufacturing process of an illuminated key unit 21 by marking after assembly according to the present invention.
- reference numeral 21 denotes a key unit
- 22 denotes a key top
- 23 denotes a keypad made of silicone rubber or a thermoplastic elastomer
- 24 denotes basic characters
- 25 denotes a language.
- the dependent character, 26, is a laser beam irradiation device.
- the key top 22 shown in FIG. 11 is made of, for example, a resin composition in which a polycarbonate (PC) resin is mixed with an appropriate amount of ketene black as an absorbent.
- the keypad 23 is formed by injection molding of silicone rubber (S2), and the keypad 22 is bonded to the keypad 23 with an adhesive (S1). Four ). key pad
- a light-shielding film may be formed on the upper surface of 23 if necessary. Since the keytop 22 is a translucent or opaque molded product having a gray or black color, it is not suitable for a configuration in which characters and symbols are arranged on the bottom surface of the keytop and seen through from above. Therefore, the assembling process (S4) is performed without marking characters or the like on the bottom surface of the keytop, and the manufacturing process of the key unit 21 is interrupted.
- FIG. 11 is a plan view showing the key unit 21 in a state where the assembling step (S 4) has been completed. The whole is shown in black because the upper surface of the keypad 23 is shielded from light and the keytop 22 that looks oval or oval also looks gray or black due to the ketidine plaque combination.
- the manufacturing process of the key unit 21 is resumed, and as shown in Fig. 14, characters and the like irrelevant to the language used (basic Characters 4 and characters / symbols (language-dependent characters) 5 depending on the language used at the destination are combined and marked on the top surface of the keytop 22 by laser light irradiation (S6).
- S6 laser light irradiation
- POM polyacetal
- ABS acrylonitrile-butadiene-styrene copolymer
- Resin ethylene glycol dimethacrylate
- HIPS impact polystyrene
- PP polypropylene
- PA polyamide
- PBT polybutylene terephthalate
- ABS—PBT alloy mixed resin
- ABS—PC alloy resin etc.
- the colors of characters and symbols to be marked can be changed to yellow, green, blue, orange, pink, etc. It is also possible to develop color. In this case, it is also possible to change the character color of each keytop according to the function of each key.
- FIG. 12 is a conceptual diagram illustrating a marking process by irradiating the top surface of the key top 22 with laser light.
- a marking pattern M for each key which is a combination of numbers 24 (basic characters) and language-dependent characters / symbols 25 that should be marked on the top surface of the key tops 22 and that are irrelevant to the language used, is described. Designed. This design is performed collectively for all keys included in the target key unit.
- the marking pattern of the key group according to the design is input to the laser beam irradiation device 26 and stored as digital data.
- the laser beam irradiator 26 is based on the stored digital data, and the three-dimensional position (X, Y,
- the laser oscillation means used in the laser light irradiation device 26 is not particularly limited as long as the power required for marking can be obtained.
- widespread carbon dioxide A laser or a typical solid-state laser such as a ⁇ AG laser can be used.
- the oscillation type may be either a continuous type or an intermittent (pulse) type.
- FIG. 13 is an enlarged side sectional view showing a state in which the top surface of one key top 22 is marked by laser light irradiation. Dashed lines represent letters, symbols M, and the like as a three-dimensional set of whitening points formed directly below the top of the keytop 22.
- FIG. 14 is a plan view showing the key cut 21 in a state where the marking after the destination is determined is completed. The basic characters 24 formed on the top of the keytop 21 and the characters and symbols 25 (Arabic in the figure) combined with the basic characters are shown.
- FIG. 15 to 17 A ninth embodiment employing a keytop whose surface is covered with a multilayer film which can be printed by irradiation will be described with reference to FIGS. 15 to 17.
- FIG. 15 to 17 A ninth embodiment employing a keytop whose surface is covered with a multilayer film which can be printed by irradiation will be described with reference to FIGS. 15 to 17.
- a key top whose surface is coated with a multi-layer film that can be printed by laser irradiation is coated with a key pad made of translucent rubber or a thermoplastic elastomer (hereinafter referred to as “translucent”).
- Optical keypad a key pad made of translucent rubber or a thermoplastic elastomer (hereinafter referred to as “translucent”).
- the top surface of the key top is irradiated with a laser beam to perform marking of required characters, symbols, and the like. In this way, the letters and symbols marked on the inside of the multilayer film do not peel off or disappear due to friction or the like, so that excellent wear resistance is realized.
- the film disclosed in International Publication No. 02/370677 pamphlet (WO 2306777) is used. can do.
- the pamphlet discloses a multilayer film in which a metal vapor-deposited film is provided on the lower surface of a transparent plastic film, and a colored layer is further provided thereunder at a slight distance.
- the manufacturing process of the key unit once all the processes including assembly that can be executed with the destination undecided are completed, the manufacturing is temporarily suspended or terminated to produce a semi-finished product. Sandals Then, the key top covered with a multilayer film and the translucent keypad are joined, and assembled. The only process left in this semi-finished product is the marking on the top of the keytop. As soon as the letters and symbols related to the destination are determined, the top of the keytop is irradiated with a laser beam to make the final marking including the letters and symbols related to the destination. The key unit can be completed in the shortest time after the destination is determined.
- FIG. 17 is a conceptual diagram showing the configuration of the multilayer film 2a.
- reference numeral 37 denotes a plastic film in the multilayer film 2a
- 38 denotes a metal deposition film
- 39 denotes a colored layer.
- a polyethylene terephthalate (PET) resin film with a thickness of 50 ⁇ is used as the plastic film 37, and a protective layer / coloring layer (giving the exterior color) with a thickness of 10 ra is provided thereunder.
- PET polyethylene terephthalate
- a protective or coloring layer 41 having a thickness of 10 ⁇ m, which is transparent or colored and transparent an adhesive layer 42 having a thickness of 200 ⁇ , a coloring layer 39 having a thickness of ⁇ ⁇ ⁇ ), And a resin film 37a having a thickness of 50 ⁇ was formed by overlapping.
- This multilayer film 2a is stamped and formed to form an outer shape of the key top 2 as shown in FIG. 4, and a transparent hard resin 10 such as a polycarbonate (PC) resin or a PET resin is injected into a concave portion on the back surface. And created Key Top 2.
- a transparent hard resin 10 such as a polycarbonate (PC) resin or a PET resin
- the process diagram of this embodiment is the same as the process diagram shown in FIG.
- the keytop 2 and the keypad 1 are separately prepared (processes S1 and S2), and both are assembled with an adhesive or the like (process S4).
- a light-shielding film may be formed on the upper surface of the keypad 1 if necessary. Since the surface of the key top 2 is covered with an opaque multilayer film 2a except for the part printed by irradiating the laser beam from the top surface, letters and symbols are arranged on the bottom surface of the key top and seen through from the top surface It is not suitable for the configuration.
- the assembling process (S4) is performed without marking characters or the like on the bottom surface of the key top 2, and in that state, the manufacturing process of the key unit K is temporarily interrupted to produce a semi-finished product.
- the marking means is the same, even if multiple types of key tops are mixed, it can be handled by controlling the operation with the marking means (by finely controlling the operation of the marking means in the same process). For example, if the marking means is blasting, it is possible to mix resin key tops and glass key tops. If the marking means is laser processing, it is possible to cope with a mixture of film key tops, keys for marking by blackening or whitening, and keys for marking by multicoloring.
- FIG. 15 is a plan view showing the key unit 1 in a state where the assembling step (S 4) has been completed.
- the oval or oval part visible in it is the keytop 2 which is left unmarked.
- the marking process diagram by irradiating the top of the keytop 2 with laser light is the same as the process diagram shown in FIG.
- a marking pattern for each key which is a combination of numbers 4 (basic characters) and language-dependent characters / symbols 5 irrelevant to the language to be marked on the top of the key top 2, is designed. This design may be performed collectively for all keys included in the target key unit.
- the marking pattern of the key group according to the design is input to the laser beam irradiation device 26 of FIG. 12 and stored as digital data.
- the laser beam irradiator 26 is used to determine the three-dimensional position of the laser beam spot based on the stored digital data.
- the laser oscillation means used in the laser light irradiation device 26 is not particularly limited as long as the power required for marking can be obtained.
- the widespread carbon dioxide Lasers and YAG lasers which are typical solid-state lasers, can be used.
- the oscillation type may be either a continuous type or an intermittent (pulse) type.
- FIG. 16 is an enlarged side sectional view showing a state in which the top surface of one key top 2 is marked by laser light irradiation.
- the double line in the multilayer film 2a covering the key top 2 is a combination of basic characters 4 and characters and symbols 5 of a specific language.
- the key unit K in the state where the marking after the destination is determined is the same as the state shown in FIG.
- the basic character 4 formed on the top of the keytop 2 and the language-dependent character 5 combined with it (the example in Fig. 7 is Arabic) are shown.
- FIG. 18 to FIG. 21 show an embodiment of the tenth embodiment, in which the key cut is made of a glass pad on a key pad made of a transparent silicone rubber or a thermoplastic elastomer.
- This is an illuminated key unit that is made by joining key tops made of a plastic.
- a marking method an embodiment using a plast method in which fine particles of an abrasive are sprayed at a high speed onto the top surface of the glass key top will be described.
- this plast method may be either a mask type using a mask or a maskless type using no mask.
- Glass has excellent transparency, surface hardness and abrasion resistance. According to the blasting method, it is possible to freely engrave the glass surface. When marking is performed on the surface of a glass keytop by the plast method, letters, symbols, etc. are a set of minute irregular points.
- the manufacturing process of the key unit once all processes including assembly that can be executed with the destination undetermined have been completed, the manufacturing is temporarily suspended or terminated. In other words, numbers and the like irrelevant to the language used are marked, and the glass key top and the translucent keypad are joined together to complete the assembly. The only process left in this state is marking on the top of the keytop. As soon as the characters and symbols related to the destination are determined, the final marking will be performed by blast method.
- the mask-type plast method in which the parts other than the characters and symbols to be marked are protected with a mask on the surface of the glass key top to be processed takes a long time to form the mask, and the present invention requires a long time. The goal cannot be achieved sufficiently. Therefore, it is desirable to adopt a maskless plast method without using a mask. As a result, a manufacturing method that completes the key unit in the shortest time after the destination is determined is realized, and the problem is satisfied at the same time.
- FIG. 18 is a block diagram illustrating a flow of a manufacturing process of the illuminated keyboard according to the present invention.
- FIG. 19 is a plan view of the key unit 1 created in the “basic character formation” block in FIG. 18 described above. 19 to 20, reference numerals 1 are key units, 2 is a glass key top, 3 is a translucent keypad,
- 4 is a basic character
- 5 is a language-dependent character
- 46 is an automatic marking device
- 47 is a plast device.
- the glass key top 2 and the translucent keypad 1 shown in Fig. 19 were separately prepared (S1, S2), and the numbers and the like irrelevant to the language used (basic).
- Letter 4 is formed (S3) on the glass key top 2, for example, by printing, engraving, blasting, etc., on the bottom surface, and then the glass key top 2 is attached to the translucent key pad 1 with an adhesive or the like.
- Join and assemble (S4).
- the oval or oval shape shown in FIG. 19 is a glass key top 2 of each key, and a basic character 4 composed of numbers and symbols is formed on the bottom surface. These basic characters 4 are irrelevant to the language used and are formed before the "destination determination" (S5) in the above block diagram. In this state, the manufacturing process of the key unit K is temporarily interrupted.
- the basic character 4 is seen through the glass key top 2 of each key.
- the base character 4 and the language-dependent character 5 can be combined and marked on the top surface of the glass key top 2 after the destination is determined.
- the process proceeds to the assembling process S4, bypassing the process S3, and leaving the glass key top 2 unmarked.
- the manufacturing process of Key Unit K is restarted, and the characters and symbols that depend on the language used at the destination (language-dependent characters) 5 However, the top surface of the glass key top 2 is King (S6).
- the final marking on the top surface of the glass key top 2 is completed, the entire manufacturing process is completed.
- the key unit K which has been completed, is assembled into a predetermined mobile device and shipped to the destination.
- FIG. 20 is a conceptual diagram illustrating a marking step on the top surface of the glass key top 2 by a maskless plast method.
- language-dependent characters / symbols 5 to be marked on the top of the glass key top 2 are designed using a CAD device or the like. This design is performed for all keys included in the target key unit.
- the marking and pattern on each glass key top 2 according to the design are input to the automatic marking device 46 and stored as digital data.
- the automatic marking device 46 controls, based on the stored digital data, the nozzle plane position of the plastic device 47 (X and Y coordinates of the nozzle tip) and the timing of turning on / off the abrasive,
- the specified marking on the top surface of the glass key top 2 is automatically executed.
- the glass key top 2 is made by molding a low-melting glass having a softening point of about 500 ° C. as an example, and blast processing is performed using, for example, spherical steel beads as an abrasive. After the destination is determined, marking by the plast method is used to place letters and symbols 5 in the specific language (Arabic in the figure) formed on the top of the glass keytop 2.
- Example of basic letters 4 Is the same as that shown in Fig. 7.
- a hard resin is selected as a material for forming the key unit. That is, an illuminated key unit having a keypad made of a light-transmitting flexible rubber or a thermoplastic elastomer (hereinafter, referred to as a “light-transmitting keypad”) and a key top made of a hard resin is disclosed.
- a marking method a blast method is used, in which fine particles of an abrasive are sprayed at high speed onto the top surface of the hard resin key top.
- this plast method may be either a mask type using a mask or a maskless type using no mask.
- the hard resin material for forming the key top a molded product that is transparent and exhibits a large surface hardness is preferable.
- examples of such materials include polyethylene terephthalate (PET) resin, polyarylate (PAR) resin, polyatalylate (PMMA, PAA) resin, polypropylene (PP) resin, high-impact polystyrene (HIPS) resin, and styrene.
- PET polyethylene terephthalate
- PAR polyarylate
- PMMA polyatalylate
- PAA polypropylene
- HIPS high-impact polystyrene
- SAN acrylonitrile copolymer resin
- characters and symbols are expressed as a pattern of a set (fine grain) of fine irregular points, which irregularly reflects light to give an appearance that is rich in design. Since this grain pattern is engraved on the surface of the hard resin key top, it is free from exfoliation and disappearance, and exhibits excellent wear resistance.
- the mask-type blasting method in which a portion other than the characters and symbols to be marked is protected with a mask on the surface of the hard resin keytop to be processed takes a long time to form the mask, and the present invention The goal cannot be achieved sufficiently. Therefore, it is desirable to adopt a maskless blast method that does not use a mask. As a result, a manufacturing method for completing the key unit in the shortest time after determining the destination is realized, and the object of the present invention is satisfied at the same time.
- FIG. 18 The block diagram showing the flow of the manufacturing process of the illuminated key unit according to this embodiment is the same as FIG.
- the plan view of the key unit K created in the “basic character formation” block in FIG. 18 is the same as that in FIG.
- Reference symbol K is a key unit
- 2 is a hard resin key top
- 1 is a translucent keypad
- 4 is a basic character
- 5 is a language-dependent character
- 46 is an automatic marking device
- 47 is a plast device.
- a hard resin key top 2 and a translucent keypad 1 are separately prepared (Sl, S 2), and numerals (basic characters) 4 irrespective of the language used are assigned to the hard resin key.
- the key top 2 made of hard resin is joined to the translucent keypad 1 with an adhesive or the like (S 4).
- the oval or oval shape shown in FIG. 19 is a hard resin key top 2 of each key, and a basic character 4 composed of a number or a symbol is formed on the bottom surface.
- the manufacturing process of Key Unit K is restarted, and the characters and symbols that depend on the language used at the destination (language-dependent characters) 5 Is marked on the top surface of the hard resin key top 2 by the blast method (S6).
- the final marking on the top surface of the hard resin key top 2 is completed, the entire manufacturing process is completed.
- the finished key unit 1 is assembled into the specified mopile equipment and shipped to the destination.
- FIG. 20 is a conceptual diagram illustrating a marking step on a top surface of the hard resin key top 2 by a maskless plast method.
- language-dependent characters 5 to be marked on the top of the hard resin key top 2 are designed using a CAD device or the like. This design is performed collectively for all keys included in the target key unit.
- the marking pattern on each hard resin key top 2 according to the design is input to the automatic marking device 46 and stored as digital data. Based on the stored digital data, the automatic marking device 46 controls the nozzle plane position (X, Y coordinates of the nozzle tip) of the plastic device 47 in association with the timing of turning off the abrasive, Predetermined marking on the top of the hard resin key top 2 is performed automatically.
- the hard resin key top 2 is prepared by, for example, injection molding a polyethylene terephthalate (PET) resin, and then, for example, is formed by plastic processing using spherical glass beads as an abrasive.
- PET polyethylene terephthalate
- FIG. 21 is an enlarged cross-sectional view showing a state in which a marking M is applied to the top surface of one hard resin key top 2 by a blast method.
- “Xxxx” indicates characters and symbols engraved on the top surface of the hard resin key top 2.
- Fig. 7 shows an example of the arrangement of letters and symbols 5 in a specific language (Arabic in the figure) formed on the top surface of the hard resin keytop 2 by marking by the plast method after the destination is determined. (Basic character 4 and language-dependent character 5 are visible together).
- the marking method according to the invention of the first to fourth embodiments (see FIGS. 1 and 2), laser marking of characters, symbols, etc. is performed in the internal medium of a plastic key used for a mobile phone or the like.
- the beam spot diameter can be reduced to increase the light energy density at the irradiation point, so that marking can be performed quickly while keeping the temperature of the portion other than the irradiation point at or below the allowable temperature.
- execution is performed with the destination determined. All possible processes are completed, and as soon as the characters and symbols related to the destination are determined, the relevant characters and symbols are marked by impregnation printing on the top of the keytop and all processes are performed. As a result, the key unit can be completed in the shortest time after the destination is determined, and the waste of inventory due to prospective production can be eliminated.
- impregnation printing can be performed using a glass-clear general-purpose resin such as a PET resin or a POM resin. Furthermore, since the PET resin or the POM resin has no problem in abrasion resistance, a protective layer such as a UV coat on the key top surface is not required.
- the present invention is effective by performing impregnation printing while compensating for the slightly insufficient wear resistance of PC resin by combining with other materials. It can be implemented in practice.
- the inside of the keytop made of a resin composition colored by laser beam irradiation is Since the required characters and symbols are marked, they do not peel off or disappear due to friction, etc., and provide excellent wear resistance.
- laser light is applied to the top surface of the keytop, so that the required characters are placed inside the multilayer film covering the keytop. 'Since the symbols and the like are marked, they do not peel off or disappear due to friction, etc., and realize excellent wear resistance.
- the process of the practicable range is completed with the destination undecided, and a semi-finished product is set.
- a semi-finished product is set.
- the blast method is applied to the top surface of a glass key top having excellent transparency, surface hardness and wear resistance. Characters and symbols are engraved as a pattern of a set of fine irregularities (texture), giving the appearance a rich design, and this texturing pattern is free from exfoliation and disappearance, so it has excellent wear resistance Demonstrate.
- the present invention all the processes that can be performed with the destination undecided are completed, and as soon as the characters and symbols related to the destination are determined, the maskless blast method is applied to the top of the glass keytop. As a result, marking of the destination-related characters and symbols is performed and the entire process is completed, so that the key unit can be completed in the shortest time after the destination is determined.
- the blasting method is applied to the top surface of a hard resin key top having excellent transparency, surface hardness and wear resistance. Characters, symbols, etc. are engraved as a pattern of fine irregularities (grain), giving an appearance that is rich in design, and this grain pattern is free from peeling or disappearing, so it has excellent wear resistance Demonstrate.
- the key unit can be completed in the shortest time after the destination is determined.
Description
Claims
Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
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MXPA05007708A MXPA05007708A (es) | 2003-01-30 | 2003-12-25 | Un procedimiento para producir unidades de tecla en donde la marcacion en sus botones de tecla, hechos de material transmisor de luz, se puede completar mas tarde. |
JP2004567571A JPWO2004068519A1 (ja) | 2003-01-30 | 2003-12-25 | 透光性材料製のキートップへのマーキング方法、これによりマーキングしたキートップ、キーユニット、及びキーユニットの製造方法 |
EP03768255A EP1592035A4 (en) | 2003-01-30 | 2003-12-25 | METHOD FOR MARKING TOP TOUCH IN TRANSLUCENT MATERIAL, BUTTONS THEREFOR, PRODUCTS, BUTTONS AND METHOD FOR PRODUCING BUTTONS |
BR0318077-8A BR0318077A (pt) | 2003-01-30 | 2003-12-25 | Processo de produção de unidades de tecla em que uma marcação nos seus topos de tecla feita por um material de transmissão de luz pode ser completada mais tarde |
AU2003292821A AU2003292821A1 (en) | 2003-01-30 | 2003-12-25 | Method for marking key top made of translucent material, key top marked by that method, key unit, and process for producing key unit |
US10/542,691 US7616224B2 (en) | 2003-01-30 | 2003-12-25 | Process of producing key units wherein marking on their tops made of light-transmitting material can be completed later on |
Applications Claiming Priority (14)
Application Number | Priority Date | Filing Date | Title |
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JP2003-21276 | 2003-01-30 | ||
JP2003021276 | 2003-01-30 | ||
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US (1) | US7616224B2 (ja) |
EP (1) | EP1592035A4 (ja) |
JP (1) | JPWO2004068519A1 (ja) |
KR (1) | KR101001505B1 (ja) |
AU (1) | AU2003292821A1 (ja) |
BR (1) | BR0318077A (ja) |
MX (1) | MXPA05007708A (ja) |
WO (1) | WO2004068519A1 (ja) |
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- 2003-12-25 KR KR1020057011214A patent/KR101001505B1/ko not_active IP Right Cessation
- 2003-12-25 BR BR0318077-8A patent/BR0318077A/pt not_active Application Discontinuation
- 2003-12-25 MX MXPA05007708A patent/MXPA05007708A/es not_active Application Discontinuation
- 2003-12-25 JP JP2004567571A patent/JPWO2004068519A1/ja active Pending
- 2003-12-25 WO PCT/JP2003/016770 patent/WO2004068519A1/ja active Application Filing
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JPWO2013129027A1 (ja) * | 2012-02-27 | 2015-07-30 | テルモ株式会社 | 医療用チューブのマーキング部形成方法、医療用チューブ、及び医療用デバイス |
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Also Published As
Publication number | Publication date |
---|---|
JPWO2004068519A1 (ja) | 2006-05-25 |
BR0318077A (pt) | 2005-12-20 |
KR20050088187A (ko) | 2005-09-02 |
AU2003292821A1 (en) | 2004-08-23 |
EP1592035A1 (en) | 2005-11-02 |
MXPA05007708A (es) | 2006-01-17 |
US7616224B2 (en) | 2009-11-10 |
KR101001505B1 (ko) | 2010-12-14 |
US20060042071A1 (en) | 2006-03-02 |
EP1592035A4 (en) | 2008-12-24 |
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