EP3530477A1 - Feuille de transfert thermique, feuille d'impression, et dispositif d'impression par transfert thermique - Google Patents
Feuille de transfert thermique, feuille d'impression, et dispositif d'impression par transfert thermique Download PDFInfo
- Publication number
- EP3530477A1 EP3530477A1 EP18841727.3A EP18841727A EP3530477A1 EP 3530477 A1 EP3530477 A1 EP 3530477A1 EP 18841727 A EP18841727 A EP 18841727A EP 3530477 A1 EP3530477 A1 EP 3530477A1
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- Prior art keywords
- thermal transfer
- printing
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Images
Classifications
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- 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
- B41J2/315—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective application of heat to a heat sensitive printing or impression-transfer material
- B41J2/32—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective application of heat to a heat sensitive printing or impression-transfer material using thermal heads
- B41J2/325—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective application of heat to a heat sensitive printing or impression-transfer material using thermal heads by selective transfer of ink from ink carrier, e.g. from ink ribbon or sheet
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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
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- B41M5/382—Contact thermal transfer or sublimation processes
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- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J17/00—Mechanisms for manipulating page-width impression-transfer material, e.g. carbon paper
- B41J17/36—Alarms, indicators, or feed-disabling devices responsible to material breakage or exhaustion
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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
- B41J2/22—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective application of impact or pressure on a printing material or impression-transfer material
- B41J2/23—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective application of impact or pressure on a printing material or impression-transfer material using print wires
- B41J2/235—Print head assemblies
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- 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
- B41J2/475—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 for heating selectively by radiation or ultrasonic waves
- B41J2/4753—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 for heating selectively by radiation or ultrasonic waves using thermosensitive substrates, e.g. paper
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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
- B41M5/34—Multicolour thermography
- B41M5/345—Multicolour thermography by thermal transfer of dyes or pigments
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- 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
- B41M5/40—Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used characterised by the base backcoat, intermediate, or covering layers, e.g. for thermal transfer dye-donor or dye-receiver sheets; Heat, radiation filtering or absorbing means or layers; combined with other image registration layers or compositions; Special originals for reproduction by thermography
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- B41M5/00—Duplicating or marking methods; Sheet materials for use therein
- B41M5/50—Recording sheets characterised by the coating used to improve ink, dye or pigment receptivity, e.g. for ink-jet or thermal dye transfer recording
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- B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
- B41M7/00—After-treatment of prints, e.g. heating, irradiating, setting of the ink, protection of the printed stock
- B41M7/0045—After-treatment of prints, e.g. heating, irradiating, setting of the ink, protection of the printed stock using protective coatings or film forming compositions cured by mechanical wave energy, e.g. ultrasonics, cured by electromagnetic radiation or waves, e.g. ultraviolet radiation, electron beams, or cured by magnetic or electric fields, e.g. electric discharge, plasma
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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
- B41J2202/00—Embodiments of or processes related to ink-jet or thermal heads
- B41J2202/30—Embodiments of or processes related to thermal heads
- B41J2202/33—Thermal printer with pre-coating or post-coating ribbon system
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- B41M2205/00—Printing methods or features related to printing methods; Location or type of the layers
- B41M2205/26—Donor or receiver with registry means
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- B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
- B41M2205/00—Printing methods or features related to printing methods; Location or type of the layers
- B41M2205/30—Thermal donors, e.g. thermal ribbons
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- B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
- B41M2205/00—Printing methods or features related to printing methods; Location or type of the layers
- B41M2205/32—Thermal receivers
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
- B41M2205/00—Printing methods or features related to printing methods; Location or type of the layers
- B41M2205/36—Backcoats; Back layers
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- 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
- B41M5/382—Contact thermal transfer or sublimation processes
- B41M5/38207—Contact thermal transfer or sublimation processes characterised by aspects not provided for in groups B41M5/385 - B41M5/395
- B41M5/38214—Structural details, e.g. multilayer systems
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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
- B41M5/382—Contact thermal transfer or sublimation processes
- B41M5/38228—Contact thermal transfer or sublimation processes characterised by the use of two or more ink layers
-
- 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
- B41M5/382—Contact thermal transfer or sublimation processes
- B41M5/38264—Overprinting of thermal transfer images
-
- 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
- B41M5/40—Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used characterised by the base backcoat, intermediate, or covering layers, e.g. for thermal transfer dye-donor or dye-receiver sheets; Heat, radiation filtering or absorbing means or layers; combined with other image registration layers or compositions; Special originals for reproduction by thermography
- B41M5/42—Intermediate, backcoat, or covering layers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
- B41M7/00—After-treatment of prints, e.g. heating, irradiating, setting of the ink, protection of the printed stock
- B41M7/0027—After-treatment of prints, e.g. heating, irradiating, setting of the ink, protection of the printed stock using protective coatings or layers by lamination or by fusion of the coatings or layers
Definitions
- the present invention relates to a thermal transfer sheet, a printing sheet, and a thermal transfer printing apparatus.
- Thermal transfer printers have been widely used which print letters, characters, images, and the like onto an image receiving sheet or any other body to be transferred by using a thermal transfer sheet (ink ribbon).
- the thermal transfer sheet includes a ribbon (support layer), which is a long strip, and a dye layer disposed on the ribbon, and, optionally, a protective layer and a hot-melt ink layer.
- a detection mark is formed of an ink containing a pigment, such as carbon black or aluminum, between each dye layer or between a dye layer and the adjacent protective layer.
- a thermal transfer printing apparatus reads the detection mark of the thermal transfer sheet loaded therein to determine a print start position and identify the type and the size of the thermal transfer sheet.
- securing regions where detection marks are formed between the dye layers increases the full length of the thermal transfer sheet, accordingly increasing the amount of the substrate to be used and increasing manufacturing cost.
- scattered ink may be printed at unwanted positions, leading to defects in thermal transfer images.
- PTL 1 discloses a thermal transfer sheet including dye layers for two or more colors that are sequentially arranged in a plane direction, wherein any of the dye layers has a two-layer structure and one layer of the two-layer structure forms a detection mark having a difference in color from the adjacent portion.
- the step of forming a further detection layer (dye layer) is required for the detection mark, the manufacturing cost increases.
- the color properties of the image may vary.
- PTLs 2 and 3 each disclose a thermal transfer dye sheet including a yellow dye layer, a magenta dye layer, and a cyan dye layer, wherein the yellow dye layer has a print region (detection mark) for a binary code or the like producing a difference in optical density capable of being detected by a printer, the print region being formed by varying the thickness of the yellow dye.
- the thickness of the dye layer is varied so as to produce a difference in optical density, color properties in high-resolution printing may vary.
- PTLs 4 and 5 each disclose a thermal transfer sheet including dye layers for one or more colors sequentially arranged in a plane direction and a detection layer disposed between the substrate and the dye layers or between the substrate and a rear surface layer.
- a detection layer disposed between the substrate and the dye layers or between the substrate and a rear surface layer.
- the present invention takes account of such circumstances and an object of the present invention is to provide a thermal transfer sheet capable of being identified by a thermal transfer printing apparatus, as well as being capable of preventing color property changes in high-resolution printing and reducing production cost. Also, it is an object of the present invention to provide a printing sheet capable of being identified by a thermal transfer printing apparatus. Furthermore, it is an object of the present invention to provide a thermal transfer printing apparatus configured to identify the thermal transfer sheet or a printing sheet loaded therein and perform printing operation.
- a thermal transfer sheet includes a dye layer and a protective layer disposed on one surface of a substrate, wherein the protective layer contains an invisible light absorbing material and is provided with an identification mark having at least one of a recessed portion and a protruding portion.
- the identification mark has a protruding strip or a recessed strip.
- the protruding strip or the recessed strip extends in a transverse direction of the sheet.
- the identification mark is located at a periphery of the protective layer that is not transferred to printing paper.
- a thermal transfer printing apparatus includes a thermal head and a platen roll and in which the thermal head heats the thermal transfer sheet according to the present invention to transfer a dye onto a printing paper while the thermal transfer sheet and the printing paper, lying one on the other, are transported between the thermal head and the platen roll, thus forming an image on the printing paper and transferring the protective layer onto the image.
- the thermal transfer printing apparatus includes a detector disposed between a feeder feeding the thermal transfer sheet and the thermal head, the detector detecting the identification mark, a memory storing a table in which a type of the thermal transfer sheet and a pattern of the identification mark are associated with each other, and an identification unit referring to the table and identifying the thermal transfer sheet fed from the feeder based on the pattern detected by the detector.
- the pattern of the identification mark is represented by the number of strips or portions, a width, a shape or a position of the identification mark.
- a thermal transfer printing apparatus includes a thermal head and a platen roll and in which the thermal head heats a thermal transfer sheet including a dye layer and a protective layer containing an invisible light absorbing material to transfer a dye onto a printing paper while the thermal transfer sheet and the printing paper, lying one on the other, are transported between the thermal head and the platen roll, thus forming an image on the printing paper and transferring the protective layer onto the image.
- the thermal transfer printing apparatus includes a detector disposed between a feeder feeding the thermal transfer sheet and the thermal head, the detector applying invisible light to the protective layer and measuring an intensity of invisible light transmitted through or reflected from the protective layer, a memory storing a table in which a type of the thermal transfer sheet and the intensity are associated with each other, and an identification referring to the table and identifying the thermal transfer sheet fed from the feeder based on a measurement result of the detector.
- the table contains printing conditions associated with each type of the thermal transfer sheet, and printing operation is performed under the printing conditions associated with the type of the thermal transfer sheet identified by the identification unit.
- a printing sheet includes a substrate, an intermediate layer disposed on the substrate, and a receiving layer disposed on the intermediate layer.
- the intermediate layer contains an invisible light absorbing material and is provided with an identification mark including at least one of a recessed portion and a protruding portion.
- the identification mark includes a protruding strip or a recessed strip.
- a thermal transfer printing apparatus includes a thermal head and a platen roll and in which the thermal head heats the thermal transfer sheet according to the present invention to transfer a dye onto the printing sheet according to the present invention while the thermal transfer sheet and the printing sheet, lying one on the other, are transported between the thermal head and the platen roll, thus forming an image on the printing sheet and transferring the protective layer onto the image.
- the thermal transfer printing apparatus includes a first detector disposed between a feeder feeding the thermal transfer sheet and the thermal head, the first detector detecting a first identification mark provided in the protective layer, a second detector detecting a second identification mark provided in the intermediate layer, a memory storing a table in which a type of the thermal transfer sheet and a pattern of the first identification mark are associated with each other and a table in which a type of the printing sheet and a pattern of the second identification mark are associated with each other, and an identification unit referring to the tables, identifying the type of the thermal transfer sheet based on the pattern detected by the first detector, and identifying the type of the printing sheet based on the pattern detected by the second detector.
- the thermal transfer printing apparatus further includes a light source applying invisible light to the thermal transfer sheet and the printing sheet.
- the printing sheet is irradiated with invisible light transmitted through the protective layer, the first detector receives light from the protective layer, and the second detector receives light from the printing sheet, the light having been transmitted through the protective layer.
- the protective layer of the thermal transfer sheet contains an ultraviolet light absorbing material
- the intermediate layer of the printing sheet contains a fluorescent brightening agent
- the present invention enables a thermal transfer printing apparatus to identify thermal transfer sheets, as well as to prevent color property changes in high-resolution printing and reduce production cost.
- Fig. 1 is a schematic diagram of a thermal transfer printing apparatus according to an embodiment of the present invention
- Fig. 2 is a plan view of a thermal transfer sheet 5 used in the thermal transfer printing apparatus
- Fig. 3 is a sectional view of the thermal transfer sheet 5.
- the thermal transfer sheet 5 includes: dye layers 52 containing a dye and a binder resin and a transfer protective layer (hereinafter referred to as a protective layer 54) that are repetitively and sequentially arranged in a plane direction on one surface of a substrate 50; and a rear surface layer 57 on the other surface of the substrate 50.
- the dye layers 52 include yellow (Y) dye layers, magenta (M) dye layers and cyan (C) dye layers that are sequentially arranged in a plane direction.
- a dye primer layer may be disposed between the substrate 50 and the arrangement of the dye layers 52 and the protective layers 54. Also, a rear primer layer may be disposed between the substrate 50 and the rear surface layer 57.
- the thermal transfer printing apparatus includes a thermal head 1 configured to sublimate and transfer Y, M and C onto a printing sheet 7 (printing paper, image-receiving paper) with the thermal transfer sheet 5, thus printing an image and forming a protective layer over the image.
- a thermal head 1 configured to sublimate and transfer Y, M and C onto a printing sheet 7 (printing paper, image-receiving paper) with the thermal transfer sheet 5, thus printing an image and forming a protective layer over the image.
- a feeder 3 formed by winding the thermal transfer sheet 5 thereon is disposed downstream from the thermal head 1, and a collecting unit 4 is disposed upstream from the thermal head 1.
- the thermal transfer sheet 5 fed from the feeder 3 passes the thermal head 1 and is taken up by the collecting unit 4.
- a rotatable platen roll 2 is disposed below the thermal head 1.
- a printing unit 40 which includes the thermal head 1 and the platen roll 2, pinches the printing sheet 7 and the thermal transfer sheet 5 and heats the thermal transfer sheet 5 to transfer dyes onto the printing sheet 7, thus forming an image.
- the printing unit 40 also heats the protective layer 54 to transfer the protective layer onto the image.
- transfer energy for forming the protective layer printing energy for printing by the printing unit 40
- the surface of the protective layer becomes matt and has a low glossiness
- by reducing the transfer energy the surface of the protective layer becomes glossy and has a high glossiness.
- a rotatable capstan roller 9a for transporting the printing sheet 7 and a pinch roller 9b for pressing the printing sheet 7 on the capstan roller 9a are disposed upstream from the thermal head 1.
- the printing sheet 7 is wound on a printing paper roll 6 and fed from the printing paper roll 6.
- the printing sheet 7 may be a known one.
- a driving section 30, which includes the printing paper roll 6, the capstan roller 9a, and the pinch roller 9b, feeds the printing sheet 7 (transports the printing sheet forward) and takes up the printing sheet (transports the printing sheet backward).
- the printing sheet 7 that has been subjected to image formation and transfer of the protective layer in the printing unit 40 is cut into a printed cut sheet 7a with a cutter 8 on the downstream side.
- the printed cut sheet 7a is ejected through an ejection port (not shown).
- the protective layer 54 of the thermal transfer sheet 5 contains an invisible light absorbing material.
- the invisible light absorbing material may be, for example, a fluorescent brightening agent, an ultraviolet light absorbing material, or an infrared light absorbing material.
- a detector 20 suitable for a type of the invisible light absorbing material is disposed in the vicinity of the feeder 3.
- the protective layer 54 contains a fluorescent brightening agent, a fluorescence sensor is used as the detector 20, and the protective layer 54 is irradiated with ultraviolet light.
- the detector 20 receives fluorescence emitted from the protective layer 54 to measure the fluorescence intensity.
- an ultraviolet sensor or an infrared sensor is used as the detector 20, and the protective layer 54 is irradiated with ultraviolet light or infrared light.
- the detector 20 measures the intensity (reflectance or transmittance) of light reflected from or transmitted through the protective layer 54.
- Ultraviolet light refers to a radiation having a maximum absorption wavelength ( ⁇ max) range of 280 nm or more and 400 nm or less.
- Infrared light refers to a radiation having a maximum absorption wavelength ( ⁇ max) range of 780 nm or more and 1 mm or less.
- the wavelength range of visible light is from more than 400 nm to less than 780 nm.
- the protective layer 54 has an identification mark 55 therein, and the measurement value of the detector 20 corresponding to the portion of the identification mark 55 is different from the measurement value of the detector 20 corresponding to the region other than the portion of the identification mark 55.
- the identification mark 55 may be defined by a recessed portion having a thickness smaller than the region other than the portion of the identification mark 55, as shown in Fig. 3 and Fig. 4a .
- the identification mark 55 may be defined by a protruding portion having a thickness larger than the region other than the portion of the identification mark 55, as shown in Fig. 4b .
- the identification mark 55 may be defined by a protruding or recessed strip (line pattern) extending in the width direction (the transverse direction (short length direction) of the sheet perpendicular to the longitudinal direction of the sheet) of the thermal transfer sheet.
- line pattern the width direction
- the measurement value varies at an edge of the identification mark 55.
- the detector 20 thus detects the pattern of the identification mark 55 represented by the number of strips or portions, the width, the shape, the position or the like of the mark.
- the position at which the detector 20 starts receiving fluorescence corresponds to the front edge of the protective layer 54. Subsequently, the position at which the fluorescence intensity increases (decreases) corresponds to the edge of one of the ends of the identification mark 55, and then, the position at which the fluorescence intensity decreases (increases) corresponds to the edge of the other end of the identification mark 55. The position from which the detector 20 no longer receives fluorescence corresponds to the rear edge of the protective layer 54.
- thermal transfer sheet 5 may be loaded in the thermal transfer printing apparatus.
- the type of thermal transfer sheet 5 and the pattern (the number of strips or portions, the width, the shape, or the position) of the identification mark 55 are recorded in association with each other in a table T in a memory 12 that will be described later herein.
- the number of strips of the identification mark 55 may vary depending on the type of thermal transfer sheet 5, as shown in Figs. 5a and 5b .
- the width of the identification mark 55 denoted by w1 or w2 may vary depending on the type of thermal transfer sheet 5, as shown in Figs. 6a and 6b .
- the position of the identification mark 55 in the longitudinal direction of the thermal transfer sheet may vary depending on the type of thermal transfer sheet 5, as shown in Figs. 7a and 7b .
- the identification mark 55 may be formed on a part in the transverse direction of the sheet, and the position of the identification mark 55 in the transverse direction of the sheet may vary depending on the type of thermal transfer sheet 5, as shown in Figs. 8a and 8b .
- the type of thermal transfer sheet 5 may be represented by a combination of the number of strips or portions, the width, the shape, the position and the like of the identification mark 55.
- the identification mark 55 defined by a protruding strip or a recessed strip may extend in the longitudinal direction of the sheet, as shown in Fig. 9 .
- the identification mark 55 is not necessarily in the shape of a straight line but may be in the shape of a wavy line.
- the identification mark 55 is not limited to a line pattern and may be a checkered pattern or a pattern in a shape of heart, star, spade or the like, as shown in Fig. 10 .
- a control device 10 controls the operation of members or components of the thermal transfer printing apparatus and operates for identification of the thermal transfer sheet 5 and printing.
- the control device 10 is a computer including a CPU (central processing unit) and a memory 12 including a flash memory, a ROM (Read-only Memory), and/or a RAM (Random Access Memory).
- the memory 12 stores a control program and the above-mentioned table T.
- the CPU executes the control program to implement an identification unit 11.
- the identification unit 11 refers to the table T and identifies the type of thermal transfer sheet 5 from the detection result of the detector 20 for the identification mark 55.
- suitable printing conditions printing speed, energy applied for printing
- the type of printing sheet 7 to be used and other information may be recorded in association with each type of thermal transfer sheet 5. If the type of the printing sheet 7 loaded in the thermal transfer printing apparatus is not suitable for the type of the identified thermal transfer sheet 5, the control device 10 may output an alarm sound or a warning sign or may cancel the printing operation.
- thermal transfer sheet 5 The structure of the thermal transfer sheet 5 will now be described.
- the substrate 50 used for the thermal transfer sheet 5 may be any known thermal transfer sheet, provided that it is resistant to heat to some extent and has some strength.
- a substrate include polyethylene terephthalate films, 1,4-polycyclohexylenedimethylene terephthalate films, polyethylene naphthalate films, polyphenylene sulfide films, polystyrene films, polypropylene films, polysulfone films, aramid films, polycarbonate films, polyvinyl alcohol films, cellulose derivatives, such as cellophane and cellulose acetate, polyethylene films, polyvinyl chloride films, nylon films, polyimide films, ionomer films, and other resin films.
- the thickness of the substrate 50 is generally approximately 0.5 ⁇ m or more and 50 ⁇ m or less and is preferably approximately 3.0 ⁇ m or more and 10 ⁇ m or less.
- the substrate 50 may be subjected to surface treatment to improve the adhesion to the layer to come into contact with the substrate 50.
- the surface treatment may be corona discharge treatment, flame treatment, ozone treatment, ultraviolet treatment, radiation treatment, surface roughening treatment, chemical treatment, plasma treatment, grafting treatment, or any other known treatment for improving the surface of the resin.
- One or two or more of surface treatment techniques may be applied.
- the substrate 50 may be provided with an undercoat layer on one or both of the surfaces thereof.
- Primer treatment for forming the undercoat layer may be performed by applying a primer liquid onto the unstretched plastic film extruded from a melt extruder and stretching the film.
- a rear primer layer (adhesive layer) may be formed between the substrate 50 and the rear surface layer 57 by coating.
- the rear primer layer may be formed of, for example, polyester-based resin, polyacrylate-based resin, polyvinyl acetate-based resin, polyurethane-based resin, styrene acrylate-based resin, polyacrylamide-based resin, polyamide-based resin, polyether-based resin, polystyrene-based resin, polyethylene-based resin, polypropylene-based resin, vinyl-based resin, such as polyvinyl chloride resin, polyvinyl alcohol resin, and polyvinylidene chloride resin, polyvinyl acetal-based resin, such as polyvinyl acetoacetal and polyvinyl butyral, and cellulose-based resin.
- polyester-based resin polyacrylate-based resin, polyvinyl acetate-based resin, polyurethane-based resin, styrene acrylate-based resin, polyacrylamide-based resin, polyamide-based resin, polyether-based resin, polystyrene-based resin, polyethylene-based resin, polypropylene
- materials prepared by melting or dispersing a sublimable dye in a binder resin are used for the dye layers 52.
- the sublimable dye include diarylmethane-based dyes; triarylmethane-based dyes; thiazole-based dyes; merocyanine dyes; pyrazolone dyes; methine-based dyes; indoaniline-based dyes; azomethine-based dyes, such as acetophenoneazomethine, pyrazoloazomethine, imidazolazomethine, imidazoazomethine, and pyridoneazomethine; xanthene-based dyes; oxazine-based dyes; cyanostyrene-based dyes, such as dicyanostyrene and tricyanostyrene; thiazine-based dyes; azine-based dyes; acridine-based dyes; benzene azo-based dyes; azo dye
- the sublimable dye content in each dye layer is 5% by mass or more and 90% by mass or less, preferably 20% by mass or more and 80% by mass or less, relative to the total solid content of the dye layer.
- the binder resin used to hold the dye is, in general, resistant to heat and appropriately compatible with the dye.
- the binder resin include cellulose-based resins, such as ethyl cellulose, hydroxyethyl cellulose, ethyl hydroxy cellulose, hydroxypropyl cellulose, methyl cellulose, cellulose acetate, and cellulose butyrate; vinyl-based resins, such as polyvinyl alcohol, polyvinyl acetate, polyvinyl butyral, polyvinyl acetoacetal, and polyvinylpyrrolidone; acrylic resins, such as poly(meth)acrylates and poly(meth)acrylamide; polyurethane-based resins; polyamide-based resins; and polyester-based resins.
- cellulose-based resins such as ethyl cellulose, hydroxyethyl cellulose, ethyl hydroxy cellulose, hydroxypropyl cellulose, methyl cellulose, cellulose acetate, and cellulose butyrate
- binder resins cellulose-based resins, vinyl-based resins, acrylic resins, urethane-based resins, polyester-based resins, and the like are preferred in terms of, for example, heat resistance and dye transferability.
- Vinyl-bases resins are more preferred, and polyvinyl butyral, polyvinyl acetoacetal, and the like are particularly preferred.
- the dye layers 52 may contain an additive, such as a release agent, inorganic particles, or organic particles.
- the release agent may be silicone oil, phosphoric acid ester, or the like.
- the inorganic particles may be particles of carbon black, aluminum, molybdenum disulfide, or the like.
- the organic particles may be polyethylene wax particles or the like.
- the dye layers 52 may be formed by applying a coating liquid, which is prepared by dissolving or dispersing any of the above-cited dyes, the binder resin, and optionally added additives in an appropriate organic solvent or water, onto one of the surfaces of the substrate 50 by a known method, such as gravure printing, screen printing, or reverse roll coating using a gravure plate, and drying the applied coating liquid.
- a coating liquid which is prepared by dissolving or dispersing any of the above-cited dyes, the binder resin, and optionally added additives in an appropriate organic solvent or water
- the organic solvent may be toluene, methyl ethyl ketone, ethanol, isopropyl alcohol, cyclohexanone, dimethylformamide [DMF], or the like.
- Each dye layer when dried, has a thickness of approximately 0.2 ⁇ m or more and 6.0 ⁇ m or less, preferably approximately 0.2 ⁇ m or more and 3.0 ⁇ m or less.
- the protective layer 54 is made of a resin conventionally used for forming a protective layer, to which a fluorescent brightening agent, an ultraviolet light absorbing material, or an infrared light absorbing material is added.
- a resin conventionally used for forming a protective layer to which a fluorescent brightening agent, an ultraviolet light absorbing material, or an infrared light absorbing material is added.
- the resin used for forming a protective layer include polyester resin, polystyrene resin, acrylic resin, polyurethane resin, acryl urethane resin, vinyl chloride-vinyl acetate copolymer, silicone-modified resins of these resins, and mixtures of these resins.
- fluorescent brightening agent examples include fluorescein-based compounds, thioflavin-based compounds, eosin-based compounds, rhodamine-based compounds, coumarin-based compounds, imidazole-based compounds, oxazole-based compounds, triazole-based compounds, carbazole-based compounds, pyridine-based compounds, imidazolone-based compounds, naphthalic acid derivatives, stilbenedisulfonic acid derivatives, stilbenetetrasulfonic acid derivatives, and stilbenehexasulfonic acid derivatives.
- the ultraviolet light absorbing material examples include organic ultraviolet light absorbing materials, such as benzotriazole-based compounds, triazine-based compounds, benzophenone-based compounds, and benzoate-based compounds, and inorganic ultraviolet light absorbing materials, such as titanium oxide, zinc oxide, cerium oxide, iron oxide, and barium sulfate.
- organic ultraviolet light absorbing materials such as benzotriazole-based compounds, triazine-based compounds, benzophenone-based compounds, and benzoate-based compounds
- inorganic ultraviolet light absorbing materials such as titanium oxide, zinc oxide, cerium oxide, iron oxide, and barium sulfate.
- benzotriazole-based compounds are preferably used.
- Examples of the infrared light absorbing material include diimonium-based compounds, aluminum-based compounds, phthalocyanine-based compounds, dithiol-based organic metal complexes, cyanine-based compounds, azo-based compounds, polymethine-based compounds, quinone-based compounds, diphenylmethane-based compounds, triphenylmethane-based compounds, and oxol-based compounds.
- the protective layer 54 may be formed by, for example, gravure printing application of a coating liquid containing the above-described resin to which an above-described fluorescent brightening agent, ultraviolet light absorbing material or infrared light absorbing material is added, followed by drying.
- the plate cylinder used in the gravure printing has very small recesses called cells in the surface thereof. The recesses are filled with the coating liquid, and the coating liquid in the recesses is applied onto the substrate 50.
- the protective layer 54 having a recessed or protruding portion (identification mark 55) having a varied thickness is formed by adjusting the recess or protrusion formed at the surface of the plate cylinder.
- the thickness of the protective layer 54 (region other than the portion of the identification mark 55), when dried, is preferably 0.1 ⁇ m or more and 2.0 ⁇ m or less.
- the thickness of the portion of the identification mark 55 is preferably 65% or more and 80% or less or 125% or more and 150% or less relative to the thickness of the region other than the portion of the identification mark 55.
- the thickness of the portion of the identification mark 55 when the thickness of the portion of the identification mark 55 is 80% or less relative to the thickness of the region other than the portion of the identification mark 55, the values, detected by the detector 20, of the identification mark 55 and the other region have a sufficient difference, and thus the identification mark 55 is easily detected. Also, when the thickness of the portion of the identification mark 55 is 65% or more relative to the thickness of the region other than the portion of the identification mark 55, the recess or protrusion of the identification mark 55 will be inconspicuous on the printed cut sheet 7a having a thermally transferred image.
- the thickness of the portion of the identification mark 55 when the thickness of the portion of the identification mark 55 is 125% or more relative to the thickness of the region other than the portion of the identification mark 55, the values, detected by the detector 20, of the identification mark 55 and the other region have a sufficient difference, and thus the identification mark 55 is easily detected. Also, when the thickness of the portion of the identification mark 55 is 150% or less relative to the thickness of the region other than the portion of the identification mark 55, the recess or protrusion of the identification mark 55 will be inconspicuous on the printed cut sheet 7a having a thermally transferred image.
- the thermal transfer sheet 5 includes the rear surface layer 57 on the surface of the substrate 50 opposite the dye layers 52 and the protective layers 54.
- the rear surface layer 57 is disposed on that surface of the substrate 50 to increase the runnability for the thermal head 1 during printing, as well as heat resistance.
- the rear surface layer 57 is made of a material appropriately selected from the known thermoplastic resins and the like.
- a thermoplastic resin include polyester-based resins, polyacrylate-based resins, polyvinyl acetate-based resins, styrene acrylate-based resins, polyurethane-based resins, polyolefin-based resins, such as polyethylene-based resins and polypropylene-based resins, polystyrene-based resins, polyvinyl chloride-based resins, polyether-based resins, polyamide-based resins, polyimide-based resins, polyamide-imide-based resins, polycarbonate-based resins, polyacrylamide resin, polyvinyl chloride resin, polyvinyl acetal resins such as polyvinyl butyral resin and polyvinyl acetoacetal resin, and silicone-modified forms of these thermoplastic resins.
- a curing agent may be added to the thermoplastic resin.
- the curing agent may be selected from the known polyisocyanate resins without particular limitation, and it is desirable to use an aromatic isocyanate adduct.
- aromatic polyisocyanate examples include 2,4-toluene diisocyanate, 2,6-toluene diisocyanate, a mixture of 2,4-toluene diisocyanate and 2,6-toluene diisocyanate, 1,5-naphthalene diisocyanate, tolidine diisocyanate, p-phenylene diisocyanate, trans-cyclohexane-1,4-diisocyanate, xylylene diisocyanate, triphenylmethane triisocyanate, and tris(isocyanatophenyl) thiophosphate.
- 2,4-toluene diisocyanate, 2,6-toluene diisocyanate, and a mixture of 2,4-toluene diisocyanate and 2,6-toluene diisocyanate are preferable.
- Such a polyisocyanate resin causes the hydroxy group of the above-described hydroxy-including thermoplastic resin to form crosslinks, thus increasing the strength and the heat resistance of the coating film for the rear surface layer 57.
- the rear surface layer 57 may contain wax, a higher fatty acid amide, a phosphate ester compound, metal soap, silicone oil, a surfactant or any other release agent, fluororesin powder or any other organic powder, inorganic particles of silica, clay, talc, calcium carbonate, or the like, and other additives to increase slip properties.
- the rear surface layer 57 is formed by applying a coating liquid, which is prepared by, for example, dispersing or dissolving the above-cited thermoplastic resin and optional additives in an appropriate solvent, onto the surface of the substrate 50 opposite the dye layers 52 and the protective layers 54 by a known method, such as gravure printing, screen printing, or reverse roll coating using a gravure plate, and drying the applied coating liquid.
- a coating liquid which is prepared by, for example, dispersing or dissolving the above-cited thermoplastic resin and optional additives in an appropriate solvent
- the thickness of the rear surface layer, when dried, is preferably 3 ⁇ m or less, more preferably 0.1 ⁇ m or more and 2 ⁇ m or less, from the viewpoint of increasing heat resistance or the like.
- the printing sheet 7 and the Y layer of the dye layers 52 are first caused to correspond in position to each other, and the thermal head 1 is brought into contact with the platen roll 2 with the printing sheet 7 and the thermal transfer sheet 5 interposed therebetween. Then, the printing sheet 7 and the thermal transfer sheet 5 are transported backward by driving for rotation of the capstan roller 9a and the collecting unit 4. During this operation, the region of the Y layer is selectively heated by the thermal head 1 on the basis of image data, so that Y is sublimated and transferred onto the printing sheet 7 from the thermal transfer sheet 5.
- the thermal head 1 rises to separate from the platen roll 2. Subsequently, the printing sheet 7 and the M layer are caused to correspond in position to each other. In this instance, the printing sheet 7 is transported forward by a distance corresponding to the print size, while the thermal transfer sheet 5 is transported backward by a distance corresponding to the margin between the Y layer and the M layer.
- M and C are sublimated to be transferred one after the other onto the printing sheet 7 on the basis of image data in a manner similar to the sublimation transfer of Y, thus forming an image on the printing sheet 7.
- the printing sheet 7 and the protective layer 54 are caused to correspond in position to each other, and the protective layer 54 is heated by the thermal head 1, thus transferred from the thermal transfer sheet 5 onto the printing sheet 7 so as to cover the image.
- the portion of the identification mark 55 has a thickness of 65% or more and 80% or less or 125% or more and 150% or less relative to the thickness of the region other than the portion of the identification mark 55. Accordingly, the identification mark 55 in the protective layer after being transferred cannot be perceived by the naked human eye, not affecting the finished quality of the resulting printed item.
- the identification mark 55 may be formed at the periphery of the protective layer 54 that is outside the print region so as not to be transferred to the printing sheet 7. Also, from the viewpoint of reducing the effect on the appearance of the printed item, a linear identification mark 55 may be positioned only at the periphery of the printed item.
- the identification mark 55 is formed in the protective layer 54 but not in the dye layers 52, color properties are not affected.
- a coating liquid containing an invisible light absorbing material for forming the protective layer can be applied after adjusting the recess or protrusion at the surface of the plate cylinder, the number of application process steps for forming the identification mark 55 does not increase, and, accordingly, production cost does not increase.
- the identification mark 55 may have either a recessed portion or a protruding portion or both in combination.
- the above-described embodiment has described an example in which the pattern (the number of strips or portions, the width, the shape, the position, or the like) of the identification mark 55 formed in the protective layer 54 is varied for each type of thermal transfer sheet 5, the content (added concentration) of the invisible light absorbing material relative to the resin for forming the protective layer may be varied for each type of thermal transfer sheet 5 (without varying the thickness of the protective layer 54).
- the value detected by the detector 20 varies depending on the type of thermal transfer sheet 5.
- the type of thermal transfer sheet 5 and the intensity of transmitted light or reflected light are recorded in association with each other in the table T in the memory 12.
- the invisible light absorbing material added to the resin for forming the protective layer may be changed for each type of thermal transfer sheet 5.
- ultraviolet or infrared light absorption wavelength varies depending on the type of thermal transfer sheet 5.
- absorption wavelength is recorded in association with each type of thermal transfer sheet 5.
- the identification mark 55 may be located at a back end of the protective layer 54 in the longitudinal direction of the sheet so as to be used as a detection mark to determine the position of the following dye layer 52 (Y layer).
- the identification mark 55 may be located in a region not transferred to the printing sheet 7, for example, in the vicinity of the Y layer.
- the type of thermal transfer sheet 5 is identified by providing the identification mark 55 (first identification mark) formed in the protective layer 54.
- the printing sheet 7 may be provided with an identification mark (second identification mark) to identify the type of the printing sheet.
- Fig. 12 is a schematic diagram of the structure of a thermal transfer printing apparatus configured to identify also the type of printing sheet 7
- Fig. 13 is a plan view of a printing sheet 7
- Figs. 14a and 14b are each a sectional view of a printing sheet 7. While the thermal transfer printing apparatus shown in Fig. 1 is provided with a detector 20 (first detector), the thermal transfer printing apparatus shown in Fig. 12 is different in that it is provided with the detector 20 (first detector) and a detector 60 (second detector).
- the printing sheet 7 has a receiving layer 71 on one surface of a substrate 70 and a rear surface layer 72 on the other surface.
- the substrate 70 and the receiving layer 71 are provided with an intermediate layer 73 interposed therebetween to increase adhesion between the substrate 70 and the receiving layer 71.
- the printing sheet 7 may include further layers.
- the intermediate layer 73 contains an invisible light absorbing material.
- the invisible light absorbing material may be, for example, a fluorescent brightening agent, an ultraviolet light absorbing material, or an infrared light absorbing material.
- the invisible light absorbing material in the intermediate layer 73 is different from the invisible light absorbing material in the protective layer 54.
- the detector 20 is suitable for the type of the invisible light absorbing material contained in the protective layer 54
- the detector 60 is suitable for the type of the invisible light absorbing material contained in the intermediate layer 73.
- the intermediate layer 73 contains a fluorescent brightening agent
- a fluorescence sensor is used as the detector 60. The sensor irradiates the printing sheet 7 with ultraviolet light and receives fluorescence emitted from the printing sheet 7, thus measuring the fluorescence intensity. If the intermediate layer 73 contains an ultraviolet light absorbing material or an infrared light absorbing material, an ultraviolet sensor or an infrared sensor is used as the detector 60, and the printing sheet 7 is irradiated with ultraviolet light or infrared light, thus measuring the intensity (reflectance or transmittance) of reflected light or transmitted light.
- a light source for ultraviolet irradiation may be shared with the detectors.
- Ultraviolet light emitted from the light source is transmitted through the protective layer 54, and the intermediate layer 73 is irradiated with the ultraviolet light.
- the ultraviolet light reflected from the intermediate layer 73 or the fluorescence emitted from the intermediate layer 73 is transmitted through the protective layer 54 and detected by the detector 60.
- the detector 60 may be disposed between the printing unit 40 and the printing paper roll 6.
- the intermediate layer 73 of the printing sheet 7 has an identification mark 75 therein, and the measurement value of the detector 60 by measuring the portion of the identification mark 75 is different from the measurement value of the detector 60 by measuring the region other than the portion of the identification mark 75
- the identification mark 75 in the intermediate layer 73 may be defined by a recessed portion having a thickness smaller than the region other than the portion of the identification mark 75, as shown in Fig. 14a .
- the identification mark 75 in the intermediate layer 73 may be defined by a protruding portion having a thickness larger than the region other than the portion of the identification mark 75, as shown in Fig. 14b .
- the identification mark 75 may be defined by a protruding or recessed strip (line pattern) extending in the width direction (the transverse direction (short length direction) of the sheet perpendicular to the longitudinal direction of the sheet) of the printing sheet 7.
- the detector 60 irradiates the printing sheet 7 fed and transported from the printing paper roll 6 with ultraviolet light or infrared light and scans the printing sheet 7 in the longitudinal direction, the measurement value varies at an edge of the identification mark 75.
- the detector thus can detect the pattern of the identification mark 75 represented by the number of strips or portions, the width, the shape, the position and the like of the mark. Identification marks 75 are provided at regular intervals.
- the position at which the intensity of fluorescence received by the detector 60 increases (decreases) corresponds to the edge of one of the ends of the identification mark 75, and then, the position at which the fluorescence intensity decreases (increases) corresponds to the edge of the other end of the identification mark 75.
- the type of printing sheet 7 and the pattern (the number of strips or portions, the width, the shape, and the position) of the identification mark 75 are recorded in association with each other in the table T in the memory 12. For example, the number of strips, the width, the position or the like of the identification mark 75 varies depending on the type of printing sheet 7.
- the identification unit 11 refers to the table T and identifies the type of printing sheet 7 from the detection result of the detector 60 for the identification mark 75.
- control device 10 may output an alarm sound or a warning sign or may cancel the printing operation.
- a cutter 8 cuts the printing sheet 7 in the width direction at the boundary between a region for a printed cut sheet and a region for a margin.
- the region for a printed cut sheet is ejected as the printed cut sheet 7a through the ejection port.
- the region for a margin is cut off as a margin piece and collected in a collection container (not shown) disposed right under the cutter 8.
- the image is printed slightly larger than the region for the printed cut sheet.
- the image is printed over the entire surface of the printed cut sheet 7a even if the cutting position of the cutter 8 is slightly shifted.
- the above-cited identification mark 75 may be formed in the region of a margin that will be collected as a margin piece.
- the substrate 70 of the printing sheet 7 may be high-quality paper, coated paper, resin-coated paper, art paper, cast-coated paper, paperboard, synthetic paper (polyolefin-based paper, polystyrene-based paper), synthetic resin or emulsion-impregnated paper, synthetic rubber latex-impregnated paper, synthetic resin internally added paper, cellulose fiber paper, or the like.
- the thickness of the substrate 70 may be, but is not limited to, approximately 10 ⁇ m or more and 300 ⁇ m or less.
- the receiving layer 71 contains a binder resin and a release agent.
- the binder resin may be a known resin material that can easily receive the dyes contained in the dye layers of the thermal transfer sheet.
- the release agent is intended to facilitate easy release of the thermal transfer sheet from the dye layers and may be silicone oil, polyethylene wax, amide wax, or a fluorine-based or phosphate ester-based surfactant, or the like.
- the rear surface layer 72 may be a layer having a desired function, appropriately selected in accordance with the use of the printing sheet 7.
- a rear surface layer 72 having a function to facilitate the transfer of the printing sheet 7 or a function to prevent curling is preferably used.
- an invisible light absorbing material is added to a known resin functioning as a good adhesive between the substrate 70 and the receiving layer 71.
- a resin include polyurethane resin, acrylic resin, polyethylene resin, polypropylene resin, and epoxy resin.
- the thickness of the intermediate layer 73 (region other than the portion of the identification mark 75), when dried, is preferably 0.1 ⁇ m or more and 2.0 ⁇ m or less.
- the thickness of the portion of the identification mark 75 is preferably 65% or more and 80% or less or 125% or more and 150% or less relative to the thickness of the region other than the portion of the identification mark 75.
- the thickness of the portion of the identification mark 75 when the thickness of the portion of the identification mark 75 is 80% or less relative to the thickness of the region other than the portion of the identification mark 75, the values, detected by the detector 60, of the identification mark 75 and the other region have a sufficient difference, and thus the identification mark 75 is easily detected. Also, when the thickness of the portion of the identification mark 75 is 65% or more relative to the thickness of the region other than the portion of the identification mark 75, the recess or protrusion of the identification mark 75 will appear inconspicuously at the surface of the receiving layer 71. If the identification mark 75 is formed in a region for a margin, the recess or protrusion will not appear at the surface of the printed cut sheet 7a.
- the thickness of the portion of the identification mark 75 when the thickness of the portion of the identification mark 75 is 125% or more relative to the thickness of the region other than the portion of the identification mark 75, the values, detected by the detector 60, of the identification mark 75 and the other region have a sufficient difference, and thus the identification mark 75 is easily detected. Also, when the thickness of the portion of the identification mark 75 is 150% or less relative to the thickness of the region other than the portion of the identification mark 75, the recess or protrusion of the identification mark 75 will be inconspicuous on the printed cut sheet 7a having a thermally transferred image. If the identification mark 75 is formed in a region for a margin, the recess or protrusion will not appear at the surface of the printed cut sheet 7a, as described above.
- the identification mark 75 may have either a recessed portion or a protruding portion or both in combination.
- the content of the invisible light absorbing material in the intermediate layer 73 may be varied for each type of printing sheet 7 (without varying the thickness of the intermediate layer 73).
- the value (received light intensity) detected by the detector 60 varies depending on the type of printing sheet 7.
- Types of printing sheet 7 and detection values are recorded in association with each other in the table T in the memory 12.
- the identification mark 55 and the identification mark 75 may be detected simultaneously or independently.
- the invisible light absorbing material in the protective layer 54 and the invisible light absorbing material in the intermediate layer 73 are the same, it is difficult to determine which the identification mark 55 or the identification mark 75 has produced a change in light intensity detected by the detector.
- the invisible light absorbing material contained in the protective layer 54 and the invisible light absorbing material contained in the intermediate layer 73 be different from each other.
- the protective layer 54 contains an ultraviolet light absorbing material
- the intermediate layer 73 contains a fluorescent brightening agent.
- the intermediate layer 73 is irradiated with ultraviolet light transmitted through the identification mark 55 of the protective layer 54.
- the identification mark 55 is preferably defined by a recessed form.
- the present invention is not limited to the above described embodiments as they are, and the elements thereof may be modified without departing from the scope and spirit of the invention when the invention is implemented. Also, appropriate combinations of the elements or components disclosed in the above-described embodiments can lead to various inventions. For example, some of the elements used in the embodiments may be omitted. Furthermore, some elements used in an embodiment may be combined with elements used in another embodiment as required.
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JP2018008302A JP6525074B2 (ja) | 2017-07-31 | 2018-01-22 | 熱転写シート、印画シートと熱転写シートとの組合せ、及び熱転写印画装置 |
PCT/JP2018/028642 WO2019026901A1 (fr) | 2017-07-31 | 2018-07-31 | Feuille de transfert thermique, feuille d'impression, et dispositif d'impression par transfert thermique |
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GB0412969D0 (en) * | 2004-06-10 | 2004-07-14 | Esselte | Thermal laser printing |
EP1872960B1 (fr) | 2006-06-30 | 2009-06-24 | Imperial Chemical Industries Limited | Feuille pour le transfert de colorant par la chaleur et imprimante |
JP2010064360A (ja) * | 2008-09-11 | 2010-03-25 | Dainippon Printing Co Ltd | 熱転写シート、熱転写受像シートと、それに使用するボビンもしくはカセット |
JP2011158627A (ja) * | 2010-01-29 | 2011-08-18 | Fujifilm Corp | 印画用シートの製造方法、印画用シート及びプリント装置 |
JP5799525B2 (ja) | 2011-02-23 | 2015-10-28 | 大日本印刷株式会社 | 熱転写シート及び熱転写記録方法 |
JP2013001047A (ja) | 2011-06-21 | 2013-01-07 | Dainippon Printing Co Ltd | 熱転写シート |
JP5760763B2 (ja) * | 2011-07-04 | 2015-08-12 | 大日本印刷株式会社 | 熱転写シート |
JP6372863B2 (ja) | 2016-02-22 | 2018-08-15 | 株式会社友縫機械 | 被服の肩ヨーク布縫製装置及び肩ヨーク布縫製方法 |
JP2018008302A (ja) | 2016-07-15 | 2018-01-18 | 日本軽金属株式会社 | 接合方法 |
-
2018
- 2018-07-31 EP EP18841727.3A patent/EP3530477B1/fr active Active
- 2018-07-31 WO PCT/JP2018/028642 patent/WO2019026901A1/fr unknown
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EP3530477A4 (fr) | 2020-07-29 |
WO2019026901A1 (fr) | 2019-02-07 |
EP3530477B1 (fr) | 2022-04-06 |
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