WO2006049099A1 - 熱現像装置及び熱現像方法 - Google Patents
熱現像装置及び熱現像方法 Download PDFInfo
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- WO2006049099A1 WO2006049099A1 PCT/JP2005/019890 JP2005019890W WO2006049099A1 WO 2006049099 A1 WO2006049099 A1 WO 2006049099A1 JP 2005019890 W JP2005019890 W JP 2005019890W WO 2006049099 A1 WO2006049099 A1 WO 2006049099A1
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- film
- heating
- heat
- temperature
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Classifications
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03D—APPARATUS FOR PROCESSING EXPOSED PHOTOGRAPHIC MATERIALS; ACCESSORIES THEREFOR
- G03D13/00—Processing apparatus or accessories therefor, not covered by groups G11B3/00 - G11B11/00
- G03D13/002—Heat development apparatus, e.g. Kalvar
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03C—PHOTOSENSITIVE MATERIALS FOR PHOTOGRAPHIC PURPOSES; PHOTOGRAPHIC PROCESSES, e.g. CINE, X-RAY, COLOUR, STEREO-PHOTOGRAPHIC PROCESSES; AUXILIARY PROCESSES IN PHOTOGRAPHY
- G03C1/00—Photosensitive materials
- G03C1/494—Silver salt compositions other than silver halide emulsions; Photothermographic systems ; Thermographic systems using noble metal compounds
- G03C1/498—Photothermographic systems, e.g. dry silver
- G03C1/49881—Photothermographic systems, e.g. dry silver characterised by the process or the apparatus
Definitions
- the present invention relates to a heat development method and a heat development apparatus capable of rapid processing, in which a sheet film coated with a photothermographic material is heated and then cooled.
- Patent Document 1 the latent film is heated by sliding a sheet film on the EC surface (emulsion surface) side between a heated heating drum having a flexible layer and a plurality of opposing rollers.
- a thermal development apparatus for developing an image-formed film Patent Document 2 listed below uses a fixed heater divided in three instead of the above-mentioned calorie thermal drum, and heats a heat developing apparatus that heats by sliding the BC surface side (support base surface side) of the film on the heater. Is disclosed.
- Patent Document 3 discloses a thermal imaging apparatus that heats a film through a slit formed on the outer periphery of a drum.
- Patent Document 4 discloses a dry gray-scale image processing apparatus that is miniaturized by performing exposure, development, and cooling continuously to simultaneously perform exposure processing and heat treatment in parallel.
- a relatively large machine as in Patent Documents 1 to 3 and a small machine as in Patent Document 4 employ a uniform heating method in the film transport direction.
- the former device can achieve uniform image quality with a uniform heating method and demonstrate a large amount of processing capacity, but in the latter half of the heating process, the film is heated and conveyed with more precision than necessary. Cost reduction due to the reduction in the number of points could not be expected.
- the latter case not only rapid processing but also uniform heating, that is, uniform concentration was not expected.
- the heat development time is generally around 14 seconds (the length in the transport direction is 17 inches), but further rapid development of the heat development process is required.
- these patent documents do not suggest or disclose a measure for a rapid heat development process.
- Patent Document 1 JP 10-500497 Gazette
- Patent Document 2 Japanese Patent Laid-Open No. 2003-287862
- Patent Document 3 US Patent Specification No. 3739143
- Patent Document 4 Japanese Patent Laid-Open No. 2002-162692
- the present invention enables rapid development of the thermal development process while maintaining the same image quality as that of a conventional large-sized machine, and also enables downsizing and cost reduction.
- An object is to provide a thermal development apparatus. It is another object of the present invention to provide a thermal development method and a thermal development apparatus that can stabilize the density and stabilize the image quality when the thermal development process is performed with a rapid processing of 10 seconds or less.
- the present inventors have conducted intensive studies and researches.
- the heat development process raises the temperature of the film to the heat development temperature, and keeps the heated film warm.
- uniform heating over the entire surface of the film in other words, close contact with the heat transfer between the film and the heating member
- heating is performed.
- the latter heat retention process in which unevenness (that is, uneven density) is likely to occur, close contact between the heating member and the film is less important than the former.
- the heating time of the sheet film on which the latent image is formed is about 14 seconds
- the solvent component (MEK ⁇ moisture) contained in the emulsion, whether heated from the emulsion side or from the anti-emulsion side. Etc.) are almost completely volatile (evaporated), so the image quality (density) is stable, but in the rapid processing that shortens the heating time, the density of the emulsion side heating and the anti-emulsion side heating is the same.
- the inventor has obtained the knowledge that a difference occurs.
- the present invention has been made on the basis of strong knowledge, and the thermal development apparatus according to the present invention transports a sheet film coated with a photothermographic material on one side of a support substrate while heating it.
- a heat developing device for visualizing a latent image formed on a sheet film the first zone comprising a fixed guide having a heater and a counter roller for pressing the sheet film against the fixed guide, and a heater
- a fixed guide having a predetermined guide with respect to the fixed guide.
- a second zone configured with another guide provided with a guide gap, and a guide gap in the second zone is 3 mm or less.
- the sheet film in the first zone, is heated by ensuring intimate contact between the heating means such as a heating member and the sheet film, thereby suppressing the occurrence of density unevenness. Because there is no need for such close contact, the sheet film is kept warm in the second zone in the guide gap, so that the thermal development process can be processed quickly while maintaining high image quality while maintaining high image quality. The structure can be reduced and the cost can be reduced. If the guide gap is 3 mm or less, the heat retention performance is less affected in the second zone regardless of the sheet film conveyance posture, and the placement accuracy between the fixed guide and another guide is not required so much. This increases the tolerance for curvature error and mounting accuracy during heating, greatly increasing the degree of design freedom, and can contribute to reducing the cost of the equipment.
- a guide gap of the second zone is in a range of 1 to 3 mm.
- the guide gap is 1 mm or more, the photothermographic material coated surface of the sheet film is difficult to touch the guide surface, and the possibility of scratches is reduced.
- the fixed guide and the guide in the second zone have substantially the same curvature.
- a guide with a substantially constant guide gap can be configured.
- the engagement time with the sheet film in the first zone and the second zone is 10 seconds or less.
- FIGS. 11 (a) and 11 (b) are diagram schematically showing the state of the emulsion side opening of the sheet film (EC surface opening) ⁇ Heating the anti-emulsion side (BC surface heating), and Fig. 11 (b) is for comparison.
- Fig. 6 is a diagram schematically showing the state of the emulsion film side opening (BC surface opening) 'emulsion side heating (EC surface heating) of the sheet film.
- the concentration difference tends to become more conspicuous, in the rapid processing method (shortening of heating time) by opening the emulsion surface side of the present invention, the concentration difference is reduced because these solvent components volatilize uniformly in a short time. It becomes difficult to occur. As a result, the density is stabilized, the sensit curve ( ⁇ curve) is stabilized, and the density gradation is stabilized.
- Fig. 11 (a) EC surface open 'In the case of BC surface heating, since the emulsion surface of the sheet film is open, the solvent (water, organic solvent) is volatilized and the concentration is reduced. Partially poor contact between the film and the heating element Fl, F2, while the amount of volatilization is relatively small and the amount of decrease in density is small, the temperature is relatively difficult to rise, and development progress is suppressed. The concentration decreases. By offsetting these, it is difficult for the density difference to occur with good contact. As a result, in-plane uniformity due to uneven density becomes advantageous.
- the thermal development method is a thermal development method in which a sheet film coated with a photothermographic material on one side of a supporting substrate is heated so that the heating time is 10 seconds or less, and then cooled in The surface of the film on which the photothermographic material is applied is opened and heated from the side of the supporting substrate.
- the thermal development process when the thermal development process is performed with a rapid processing of 10 seconds or less, the surface on which the photothermographic material is applied is opened and heated from the support substrate surface side. Since the solvent (water, organic solvent, etc.) contained in the sheet film that is heated and volatilized (evaporates) is dispersed at the shortest distance, even if the heating time (volatilization time) is short, it is not easily affected by the time reduction. At the same time, even if there is a part where the contact between the film and the heating element is poor, the difference in density is unlikely to occur, so the density can be stabilized and the image quality can be stabilized.
- the solvent water, organic solvent, etc.
- the heating step includes a temperature raising step for raising the temperature of the sheet film to a heat development temperature, and a temperature keeping for keeping the sheet film heated to the heat development temperature. Including the temperature step further prevents the occurrence of concentration unevenness.
- the heat development apparatus heats a sheet film coated with a heat-developable photosensitive material on one side of a support substrate by a heating means so that the heating time is 10 seconds or less, and then cools it by a cooling means.
- the heating means is configured to open the surface of the sheet film to which the photothermographic material is applied and to heat from the surface of the supporting substrate.
- the thermal development apparatus when the thermal development process is executed with a rapid processing of 10 seconds or less, the surface on which the photothermographic material is applied is opened and heated from the side of the support substrate. Since the solvent (water, organic solvent, etc.) contained in the sheet film that is heated and volatilized (evaporates) is dispersed at the shortest distance, even if the heating time (volatilization time) is short, it is not easily affected by the time reduction. At the same time, even if there is a part where the contact between the film and the heating element is poor, the difference in density is unlikely to occur, so the density can be stabilized and the image quality can be stabilized.
- the solvent water, organic solvent, etc.
- the heating means includes a temperature raising step for raising the temperature of the sheet film to a heat development temperature, and a temperature keeping for keeping the sheet film heated to the heat development temperature. Is configured to perform the process, and the occurrence of uneven density is less likely to occur. The invention's effect
- the heat development apparatus and the heat development method of the present invention while maintaining the image quality equivalent to that of a conventional large-sized machine, the heat development process can be quickly performed and the size and cost can be reduced. .
- the density can be stabilized and the image quality can be stabilized when the thermal development process is performed with a rapid processing of 10 seconds or less.
- FIG. 1 is a side view schematically showing a main part of a heat development apparatus according to a first embodiment.
- FIG. 2 is a side view schematically showing a main part of a heat development apparatus according to a second embodiment.
- FIG. 3 is a graph showing a temperature profile in the rapid processing method of the thermal development process in the thermal development apparatuses 1 and 40 of FIGS.
- Example IV is a side view showing the main configuration of the thermal development apparatus used in Example 1.
- FIG. 5 is a diagram showing a sensit curve ( ⁇ curve) representing the relationship between exposure dose and density in Example 1 (a) and Comparative Example 1 (b) of rapid processing.
- FIG. 6 is a diagram showing a sensit curve ( ⁇ curve) representing the relationship between exposure amount and density in Comparative Example 2 (a) and Comparative Example 3 (b) of normal processing.
- FIG. 7 is a side view showing the main configuration of the heat development apparatus used in Example 2.
- Example 2 In Example 2, measure the surface temperature of the heating plate in the slit of Fig. 7, the temperature of the heat insulating material facing the surface of the heating plate, and the temperature of the air in the slit until the heat development temperature reaches the heat development temperature. And it is a graph which shows the relationship between the time and temperature.
- FIG. 9 is a graph showing changes in film temperature when passing a film near the surface of a heating plate in a slit and when passing a wall near a heat insulating material wall in Example 2.
- FIG. 10 is a diagram showing a sensit curve (y curve) representing the relationship between exposure dose and density obtained in Example 2 and Comparative Example 4.
- Fig. 11 is a diagram schematically showing the state of the emulsion film side opening (EC surface opening) 'anti-emulsion side heating (BC surface heating) of the sheet film, and Fig. 11 (b) For comparison, it is a diagram schematically showing the state of anti-emulsion side opening (BC surface opening) ⁇ emulsion surface side heating (EC surface heating) of a sheet film.
- FIG. 1 is a side view schematically showing the main part of the thermal development apparatus according to the first embodiment.
- the thermal development apparatus 1 according to the first embodiment includes an EC surface in which a photothermographic material is coated on one side of a sheet-like support substrate having PET isotropic force, and a surface opposite to the EC surface.
- a sheet film F (hereinafter referred to as “film”) having a BC surface on the substrate side is transported in the direction H, while being transported in the direction H, based on the image data!
- a latent image is formed on the EC surface by optical scanning and exposure, and then the film F is heated from the BC surface side to be visualized and visualized.
- the heat development apparatus 1 in FIG. 1 is configured to heat the film F on which the latent image has been formed from the BC surface side to raise the temperature to a predetermined heat development temperature, and the heated film F.
- a heat retaining unit 13 that retains the temperature at a predetermined thermal image temperature and a cooling unit 14 that cools the heated film F from the BC surface side are provided.
- the temperature raising unit 10 and the heat retaining unit 13 constitute a heating unit, and the film F is heated to the heat development temperature and maintained at the heat development temperature.
- the temperature raising unit 10 includes a first heating zone 11 that heats the film F on the upstream side, and a second heating zone 12 that heats the film F on the downstream side.
- the first heating zone 11 also has a flat heating guide 1 lb which is fixed by a metal material force such as aluminum, and a silicon rubber heater which is in close contact with the back surface of the heating guide 1 lb.
- Planar heater 1 lc and heating guide 1 lb fixed guide surface 1 Id arranged to maintain a gap narrower than the film thickness so that the film can be pressed, and the surface is more thermally insulating than metal etc.
- a plurality of opposed rollers 11a having a certain force such as silicon rubber.
- the second heating zone 12 includes a planar heating guide 12b fixed by a metal material force such as aluminum, and a planar heating heater also having a force such as a silicon rubber heater in close contact with the back surface of the heating guide 12b.
- 12c and the fixed guide surface 12d of the heating guide 12b are arranged so as to maintain a gap narrower than the film thickness so that the film can be pressed, and the surface is a plurality of heat-insulating silicon rubber, etc.
- an opposing roller 12a is arranged so as to maintain a gap narrower than the film thickness so that the film can be pressed, and the surface is a plurality of heat-insulating silicon rubber, etc.
- the heat retaining unit 13 includes a planar heating guide 13b fixed by a metal material force such as aluminum, a planar heating heater 13c also having a silicon rubber heater isotropic force in close contact with the back surface of the heating guide 13b, And a guide portion 13a that also has a heat insulating material equal force disposed so as to have a predetermined gap (slit) d with respect to the fixed guide surface 13d formed on the surface of the heating guide 13b.
- the fixed guide surface 1 is supported by the opposed rollers 11a to which the film F conveyed by the conveying roller pair 16 and the like from the upstream side of the temperature raising unit 10 is rotationally driven.
- the BC surface comes into close contact with the fixed guide surface 1 Id and is conveyed in the direction H while being heated.
- the BC surface is fixed by pressing the film F conveyed from the first heating zone 11 against the fixed guide surface 12d by each counter roller 12a that is rotationally driven. It is transported in the direction H while being heated in close contact with the guide surface id.
- a concave part 17 opened in a V shape is provided, and foreign matter from the temperature raising part 10 is in the concave part 17. It is configured so that it will fall. As a result, it is possible to prevent foreign matter from the temperature raising unit 10 from being brought into the heat retaining unit 13 and to prevent the occurrence of jam “scratch” density unevenness and the like on the film.
- the film F conveyed from the second heating zone 12 is placed in the gap d between the fixed guide surface 13d of the heating guide 13b and the guide section 13a! /, And the heating guide 13b While being heated (heat-retained) by the heat from the second heating zone 12, the conveying force of the opposing roller 12a on the second heating zone 12 side It passes through the gap d.
- the gap d is preferably in the range of 1 to 3 mm.
- the film F is further conveyed in the direction H by the opposing roller 14a while being brought into contact with the cooling guide surface 14c of the cooling plate 14b having a metal material isotropic force and cooling.
- the cooling effect can be increased by adopting a finned heat sink structure for the cooling plate 14b. Place a heat sink structure cooling plate with fins on the downstream side of the cooling plate 14b.
- the film F faces the fixed guide surfaces l ld, 12d, and 13d in which the BC surface is heated in the temperature raising unit 10 and the heat retaining unit 13. It is transported with the EC side coated with photothermographic material open. Further, in the cooling unit 14, as indicated by the alternate long and short dash line, the film F is conveyed with the BC surface contacting the cooling guide surface 14c and being cooled, and the EC surface coated with the thermal imaging material is conveyed open. .
- the film F is conveyed by the facing rollers lla and 12a so that the passage time of the temperature raising unit 10 and the heat retaining unit 13 is 10 seconds or less. Therefore, the heating time from temperature rise to heat retention is also 10 seconds or less.
- the thermal development apparatus 1 of FIG. 1 in the heating unit 10 that requires uniform heat transfer, the calorie heat guide l lb, 12b and the film F are heated to the heating guide l lb, The film F is transported while ensuring contact heat transfer by bringing the film F into close contact with the fixed guide surfaces l ld and 12d by a plurality of opposite rollers 11a and 12a pressed against 12b. Since the temperature rises evenly, the finished film becomes a high-quality image with reduced density unevenness.
- the heat retaining unit 13 transports the film to the gap d between the fixed guide surface 13d of the heating guide 13b and the guide unit 13a, and in particular, closely contacts the fixed guide surface 13d. Without heating, the film temperature remains at the development temperature (eg, 123 ° C) even if heating is performed in the gap d (direct heat contact with the fixed guide surface 13d and heat transfer by contact with Z or surrounding hot air). ) Within a predetermined range (for example, 0.5 ° C). In this way, the film temperature difference is less than 0.5 ° C. regardless of whether the film is conveyed along the wall surface of the heating guide 13b or the guide portion 13a in the gap d. Since it can be maintained, there is almost no wrinkle of density unevenness in the finished film. For this reason, it is Since there is no need to provide drive parts such as a la, the number of parts can be reduced.
- the heating time of the film F is 10 seconds or less, a rapid heat development process can be realized, and the film transport path extending linearly from the temperature raising unit 10 to the cooling unit 14 is arranged in the apparatus layout.
- the installation area can be reduced and the entire equipment can be reduced.
- the heat transfer function is the same as that of the temperature raising part even in the part where the heat retention function after the film is raised to the developing temperature is sufficient, and as a result, unnecessary members are used. This increases the number of parts and increases the cost, and it is difficult to guarantee high image quality due to the problem of uneven density due to the difficulty in ensuring heat transfer during temperature rise in conventional small machines.
- the heat development process is separately executed by the temperature raising unit 10 and the heat retaining unit 13, so that all the problems that can be solved can be solved.
- the temperature difference from the part with good contact is alleviated, and as a result, the density difference hardly occurs, so the density can be stabilized and the image quality is stabilized.
- the heat conductivity of PET on the support base of force film F which was thought to be better on the EC side, was 0.17 W / m ° C
- the thickness of the PET base Considering that the length is around 170 m, the time delay is slight and can be easily offset by increasing the capacity of the heater, etc., and it is preferable to expect the effect of reducing the above-mentioned contact unevenness.
- FIG. 2 is a side view schematically showing the main part of the thermal development apparatus according to the second embodiment.
- the thermal development apparatus 40 of the second embodiment is an EC in which a photothermographic material is applied on one side of a sheet-like support base made of PET or the like as described above.
- a latent image is formed on the EC surface with the laser light L from the optical scanning exposure section 55 while carrying the sub-scan transport film F having the surface and the BC surface on the side of the supporting substrate opposite to the EC surface.
- Film F is heated from the BC side and developed to visualize the latent image, and it is transported to the top of the device through a curved transport path and discharged.
- the heat development apparatus 40 in Fig. 2 is provided near the bottom of the apparatus housing 40a and accommodates a film storage section 45 for storing a large number of unused films F and a top film F in the film storage section 45.
- Pickup roller 46 for carrying up and carrying, conveyance roller pair 47 for carrying film F from pickup roller 46, and curved surface so that the film F from conveyance roller pair 47 is guided and conveyed with the conveyance direction almost reversed.
- a light scanning exposure unit 55 that forms a latent image on the EC surface by exposing the laser light L to light scanning.
- the thermal development device 40 further heats the film F on which the latent image has been formed by heating the film F from the BC surface side to raise the temperature to a predetermined thermal development temperature, and the heated film F.
- a heat retaining part 53 that keeps the temperature at a predetermined developing temperature
- a cooling part 54 that cools the heated film F from the BC surface side
- a densitometer that is disposed on the outlet side of the cooling part 54 and measures the density of the film F 56
- a transport roller pair 57 for discharging the film F from the densitometer 56, and an inclined surface on the upper surface of the apparatus housing 40a so that the film F discharged by the transport roller pair 57 is placed.
- a film placement unit 58 that is disposed on the outlet side of the cooling part 54 and measures the density of the film F 56
- a transport roller pair 57 for discharging the film F from the densitometer 56
- an inclined surface on the upper surface of the apparatus housing 40a so that the film F discharged by the transport roller pair 57
- the film storage unit 45 As shown in FIG. 2, in the heat developing device 40, from the bottom of the device housing 40a upward, the film storage unit 45, the substrate unit 59, the conveyance roller pair 49a, 49b ′ the temperature raising unit 50 and the heat retaining unit. 53 (upstream side) in order, the film storage 45 is at the bottom, and the substrate 59 is located between the heating unit 50 and the thermal insulation unit 53. Yes.
- the transport path from the pair of transport rollers 49a, 49b to the temperature raising unit 50 in the sub-scan transport is relatively Since it is configured to be short, the film F is exposed by the optical scanning exposure unit 55, while the temperature development unit 50 and the heat retaining unit 53 perform heat development heating on the leading end side of the film F.
- the heating unit 50 and the heat retaining unit 53 constitute a heating unit, and the film F is heated to the heat development temperature and maintained at the heat development temperature.
- the temperature raising unit 50 includes a first heating zone 51 that heats the film F on the upstream side, and a second heating zone 52 that heats the film F on the downstream side.
- the first heating zone 51 includes a planar heating guide 51b fixed by a metal material force such as aluminum, and a silicon rubber heater that is in close contact with the back surface of the heating guide 51b.
- 51c and heating guide 5 lb fixed guide surface 5 Id is arranged to maintain a gap narrower than the film thickness so that the film can be pressed, and the surface is equivalent to silicon rubber with heat insulation compared to metal etc.
- a plurality of opposing rollers 51a is arranged to maintain a gap narrower than the film thickness so that the film can be pressed, and the surface is equivalent to silicon rubber with heat insulation compared to metal etc.
- the second heating zone 52 includes a planar heating guide 52b fixed by a metal material force such as aluminum, and a planar heating heater also having a force such as a silicon rubber heater in close contact with the back surface of the heating guide 52b.
- 52c and a fixed guide surface 52d of the heating guide 52b are arranged so as to maintain a gap narrower than the film thickness so that the film can be pressed, and the surface is a plurality of heat-insulating silicon rubber and the like having a thermal insulation property compared to metal etc.
- an opposing roller 52a is arranged so as to maintain a gap narrower than the film thickness so that the film can be pressed, and the surface is a plurality of heat-insulating silicon rubber and the like having a thermal insulation property compared to metal etc.
- the heat retaining unit 53 includes a heating guide 53b that is fixed by a metal material such as aluminum, a planar heating heater 53c that also has a silicon rubber heater and the like that is in close contact with the back surface of the calo heat guide 53b, and a heating guide 53b. And a guide portion 53a that also has a heat insulating material equal force and is disposed so as to have a predetermined gap (slit) d with respect to the fixed guide surface 53d formed on the surface.
- the heat retaining unit 53 is configured in a planar manner on the temperature raising unit 50 side continuously with the second heating zone 52, and is configured in a curved surface with a predetermined curvature from the middle toward the upper part of the apparatus.
- the gap d is preferably in the range of 1 to 3 mm.
- the heat retaining section 53 is configured in a planar manner on the temperature raising section 50 side continuously with the second heating zone 52, and is formed in a curved surface with a predetermined curvature from the middle toward the upper part of the apparatus.
- the curved heating guide 53b and the guide portion 53a have substantially the same curvature.
- the fixed guide is provided by the opposing rollers 51a to which the film F conveyed by the conveying roller pairs 49a and 49b from the upstream side of the temperature raising unit 50 is rotationally driven.
- the BC surface is in close contact with the fixed guide surface 5 Id and is not heated by being pressed by the surface 5 Id. Power is being transported!
- the BC surface is fixed by pressing the film F conveyed from the first heating zone 51 against the fixed guide surface 52d by each counter roller 52a that is driven to rotate. It is conveyed while being in close contact with the guide surface 51d and being heated.
- the film F conveyed from the second heating zone 52 is heated by heat from the heating guide 53b in the gap d between the fixed guide surface 53d of the heating guide 53b and the guide section 53a. While being kept warm, the gap d is passed by the conveying force of the opposing roller 52a on the second heating zone 52 side. At this time, the film F is conveyed in the gap d while gradually changing the direction of the horizontal force in the vertical direction and heads toward the cooling unit 54.
- the film F conveyed in the substantially vertical direction from the heat retaining unit 53 is cooled while being brought into contact with the cooling guide surface 14c of the cooling plate 54b, which also has a metal material isotropic force, by the counter roller 54a and cooling.
- Directional force The film F is gradually transported in an oblique direction by changing the direction of the film F to the film mounting portion 58.
- the cooling effect can be increased by making the cooling plate 54b into a heat sink structure with fins.
- a part of the cooling plate 54b may have a finned heat sink structure.
- the cooled film F coming out of the cooling unit 54 is subjected to density measurement by a densitometer 56, conveyed by a pair of conveyance rollers 57, and discharged to a film placement unit 58.
- the film placement unit 58 can temporarily place a plurality of films F.
- the film F has the BC surface facing the heated fixed guide surfaces 51d, 52d, and 53d in the heating unit 50 and the heat retaining unit 53, and Development sensitive material is transported with the EC surface coated with light-sensitive material open.
- the film F is transported with the BC surface contacting the cooling guide surface 54c and being cooled, and the EC surface coated with the heat developing material is opened.
- the film F is designed so that the passage time of the temperature raising section 50 and the heat retaining section 53 is 10 seconds or less. It is conveyed by the direction rollers 51a and 52a. Therefore, the heating time from temperature rise to heat retention is also 10 seconds or less.
- the calorie heat guides 51b and 52b and the film F are heated to 5 lb.
- the film F is transported while ensuring contact heat transfer by bringing the film F into close contact with the fixed guide surfaces 51d and 52d by a plurality of opposite rollers 51a and 52a that press against the 52b. Since the temperature rises evenly, the finished film becomes a high-quality image with reduced density unevenness.
- the heat retaining unit 53 transports the film to the gap d between the fixed guide surface 53d of the heating guide 53b and the guide unit 53a, and in particular closely contacts the fixed guide surface 53d. Without heating, the film temperature remains at the development temperature (eg, 123 ° C) even if heating is performed in the gap d (direct heat contact with the fixed guide surface 53d for heat transfer and heat transfer due to contact with Z or surrounding hot air). ) Within a predetermined range (for example, 0.5 ° C).
- the film temperature difference is less than 0.5 ° C regardless of whether the film is transported along the wall surface of the heating guide 53b or the curved surface guide 53a in the gap d, and a uniform heat insulation state is obtained. Since it can be maintained, there is almost no wrinkle of density unevenness in the finished film. For this reason, since it is not necessary to provide driving parts such as a sealer in the heat retaining section 53, the number of parts can be reduced.
- the heating time of the film F is 10 seconds or less, a rapid heat development process can be realized, and the heat retaining portion 53 extending in the horizontal direction from the temperature raising portion 50 is curved in the middle. Since the film F is almost reversed in the direction of the film F by the cooling unit 54 and discharged to the film mounting unit 58, the cooling unit 54 has a predetermined curvature according to the apparatus layout. By doing so, it is possible to reduce the installation area and reduce the overall size of the device.
- the film F can be heated in a rapid process of 10 seconds or less.
- the solvent moisture, organic solvent, etc. contained in the film F that is heated and volatilized (evaporates) by the opening of the EC surface side is dispersed at the shortest distance.
- the heat conductivity of PET on the support base of force film F which was thought to be better on the EC side, was 0.17 W / m ° C
- the thickness of the PET base Considering that the length is around 170 m, the time delay is slight and can be easily offset by increasing the capacity of the heater, etc., and it is preferable to expect the effect of reducing the above-mentioned contact unevenness.
- the cooling section 54 also has a force that attempts to volatilize (evaporate). Since the EC surface of film F is open, the solvent (water, organic solvent, etc.) is not trapped and will evaporate for a longer time, thus stabilizing the image quality. Thus, the cooling time cannot be ignored during rapid processing, and is particularly effective for rapid processing with a heating time of 10 seconds or less.
- the guide gap d of the heat retaining portions 13 and 53 is 3 mm or less, the heat retaining portions 13 and 53 have little influence on the heat retaining performance regardless of the film transport posture.
- the positioning accuracy between the heating guides 13b and 53b and the opposing guides 13a and 53a is not so much required, and the tolerance for the curvature error and mounting accuracy when machining both guides is increased, resulting in a significant increase in design freedom.
- the cost of the apparatus can be reduced.
- the guide gap d of the heat retaining portions 13 and 53 is 1 mm or more because the EC surface of the film is difficult to touch the guide surface and the possibility of scratches is reduced.
- FIG. 3 is a graph showing a temperature profile in the rapid processing method of the thermal development process in the thermal development apparatuses 1 and 40 of FIGS.
- this rapid processing method shortens the heating time B in order to shorten the total processing time A of the film in the heat development apparatuses 1 and 40 of FIGS. is there.
- the film F is urged by the opposing rollers 11a, 12a, 51a, 52a at the temperature rising portions 10, 50 that shorten the temperature rising time C to the optimum developing temperature E, and the fixed guide surface 11d, 12d, 51d and 52d are in intimate contact.
- the film F is kept at the heat development temperature for the heat retention time D in the heat retaining portions 13 and 53.
- the heat retaining units 13 and 53 convey the gap (slit) d without contacting the fixed guide surfaces 13d and 53d without an urging means such as a counter roller.
- the rapid cooling in the cooling unit in FIG. 3 can be realized by arranging a heat sink, a cooling fan, etc. in the cooling units 14 and 54.
- the heating time B (temperature increase time C + heat retention time D) can be shortened from about 14 seconds to 10 seconds or less, and the total processing time A can be shortened. .
- Example 1 The heat development apparatus shown in Fig. 4 was used in the experiment, and the configuration was as follows.
- a silicon rubber heater was pasted on the back surface of an aluminum plate having a thickness of 10 mm to form a plate-shaped heating plate.
- a silicon rubber roller with a diameter of 12 mm and an effective conveyance length of 380 mm with a silicon rubber layer with a thickness of 1 mm is placed on the surface so that the linear pressure is about 8 gfZcm.
- the coated film was pressed and conveyed while the BC surface was in contact with the heating plate.
- the transport length of the heating plate is 21 Omm.
- an aluminum plate having a thickness of 10 mm is used as first to third cooling plates, and a silicon rubber heater is provided on each of the first and second cooling plates so that the cooling temperature can be controlled.
- a heatsink with 21 fins with a thickness of 0.7 mm, a height of 35 mm, and a depth of 390 mm arranged at a pitch of 4 mm was joined to the back surface of the aluminum plate of No. 3 cooling plate.
- a silicon rubber roller with a diameter of 12 mm and an effective conveyance length of 380 mm with a silicon rubber layer of lmm thickness on the surface is placed at a linear pressure of about 8 gfZcm. It was conveyed while pressing the rum.
- the transport lengths of the first to third cooling plates are 60 mm, 105 mm, and 105 mm, respectively.
- the conveyance speed was changed to 15. ImmZs during normal processing and 21.2 mmZs during rapid processing.
- the temperature of the heating plate was 123 ° C
- the temperature of the first cooling plate was 110 ° C
- the temperature of the second cooling plate was 90 ° C
- the temperature of the third cooling plate was 30-60 ° C.
- a 2 mm gap was provided between the heat plate and the cooling plate to suppress heat transfer between the plates.
- SD-P manufactured by Co-Caminolta Co., Ltd. which is an organic solvent-based heat developing film as disclosed in JP-A-2004-102263, was used.
- the film was allowed to acclimatize by leaving it in three environments of normal (25 ° C, 50% RH), high humidity (25 ° C, 80% RH) and low humidity (25 ° C, 20% RH). (This will also change the moisture content in the film.)
- Example 1 the emulsion layer surface (EC surface) side coated with the coating solution was opened and pressed with a silicon rubber roller, and conveyed while the BC surface was in contact with the heating plate, and the heating time B in FIG. Heat development was performed in seconds (EC surface open 'BC surface heating. Rapid processing).
- FIGS. 5A and 5B are diagrams showing sensit curves ( ⁇ curves) representing the relationship between exposure amount and density in Example 1 and Comparative Example 1 of rapid processing.
- FIGS. 6 (a) and 6 (b) are diagrams showing sensit curves ( ⁇ curves) representing the relationship between exposure amount and density in Comparative Examples 2 and 3 of normal processing. [0087] As shown in Figs. 6 (a) and (b), in the conventional normal processing, there is no significant difference in the absolute concentration 'sensit curve regardless of normal' high humidity 'and low humidity for both BC surface heating and EC surface heating. I helped.
- Example 2 the effect of heating the gap (slit) in the heat retaining portion will be described according to Example 2.
- the heat development apparatus shown in FIG. 7 was used in the experiment.
- the heating system in FIG. 4 is the first heating plate on the upstream side, the rubber roller is omitted on the downstream side, and the second heating plate is used.
- a slit shape is used to heat the slit.
- the slit distance between the second heating plate and the heat insulating material was 3 mm.
- FIG. 9 shows changes in film temperature when the film is passed through the vicinity of the surface of the heating plate in the slit and when the film is passed near the wall surface of the heat insulating material.
- the slit interval is 3 mm or less and the heat retention time is 8 seconds or less
- the film temperature is slightly lower than the development temperature of 123 ° C.
- the film temperature is lower than that when passing near the heating plate surface.
- the slit gap of the heat retaining part can be 3 mm or less, and the tolerance for the curvature error and mounting accuracy when machining both guides becomes large, resulting in a great increase in design freedom.
- Example 2 the heat development process was performed using the heat development apparatus of FIG. Figure 10 shows the sensit curve ( ⁇ curve) representing the relationship between the exposure and density obtained at this time. Also, as Comparative Example 4, the heat development process was performed under the same conditions as in Example 2 except that the heat development apparatus of FIG. 4 was used, and a sensit curve ( ⁇ curve) representing the relationship between the exposure amount and density obtained at this time was used. B) is also shown in Figure 10.
- an organic solvent solvent was used for film production, but an aqueous solvent can also be used.
- a film for heat development using an aqueous solvent can be prepared as follows.
- the organic silver salt-containing layer is formed on a PET film by using a coating solution in which 30% by mass or more of the solvent is water, and is dried to form a photothermographic material having a thickness of 200 / zm.
- the binder of the organic silver salt-containing layer is soluble or dispersible in an aqueous solvent (aqueous solvent), and also has a latex power of a polymer having an equilibrium water content of 2% by mass or less at 25 ° C. and 60% RH.
- the aqueous solvent in which the polymer is soluble or dispersible is a mixture of water or water with 70% by mass or less of a water-miscible organic solvent.
- water-miscible organic solvent examples include alcohols such as methyl alcohol, ethyl alcohol, and propyl alcohol, cellosolves such as methyl caffeosolve, ethylcethylsolve sorb, and butylcectosolve, ethyl acetate, and dimethylformamide. Can be mentioned.
- alcohols such as methyl alcohol, ethyl alcohol, and propyl alcohol
- cellosolves such as methyl caffeosolve, ethylcethylsolve sorb, and butylcectosolve, ethyl acetate, and dimethylformamide.
- the emulsion layer (photosensitive layer) coating solution is prepared as follows. Fatty acid silver dispersion 10 00g, 276ml of water-1 dispersion, organic polyhalogen compound-1 dispersion, organic polyhalogen compound-2 dispersion, phthalazine compound 1 solution, SBR latex (Tg: 17 ° C) solution, reducing agent 1 Dispersion, reducing agent 2 Dispersion, hydrogen bonding compound 1 Dispersion, development accelerator 1 Dispersion, development accelerator 2 Dispersion, color modifier 1 Dispersion, mercapto compound 1 aqueous solution, mercapto compound 2 aqueous solution Add the silver halide mixed emulsion immediately before coating, and mix well mixed emulsion layer coating solution to the coating die and apply.
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Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
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CN2005800369161A CN101048701B (zh) | 2004-11-05 | 2005-10-28 | 热显影装置以及热显影方法 |
JP2006542338A JP4363445B2 (ja) | 2004-11-05 | 2005-10-28 | 熱現像装置 |
EP05799238A EP1808730A1 (en) | 2004-11-05 | 2005-10-28 | Heat developing apparatus and heat developing method |
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JP2004322120 | 2004-11-05 | ||
JP2004322121 | 2004-11-05 | ||
JP2004-322120 | 2004-11-05 | ||
JP2004-322121 | 2004-11-05 | ||
JP2004-371256 | 2004-12-22 | ||
JP2004371256 | 2004-12-22 |
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WO2006049099A1 true WO2006049099A1 (ja) | 2006-05-11 |
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PCT/JP2005/019890 WO2006049099A1 (ja) | 2004-11-05 | 2005-10-28 | 熱現像装置及び熱現像方法 |
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US (1) | US7281868B2 (ja) |
EP (1) | EP1808730A1 (ja) |
JP (1) | JP4363445B2 (ja) |
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WO (1) | WO2006049099A1 (ja) |
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US20080084591A1 (en) * | 2006-10-05 | 2008-04-10 | Rassatt Bradley B | Imaging apparatus with moveable entrance guide |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
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JP2000284456A (ja) * | 1999-03-31 | 2000-10-13 | Fuji Photo Film Co Ltd | 熱現像装置 |
JP2004212565A (ja) * | 2002-12-27 | 2004-07-29 | Fuji Photo Film Co Ltd | 画像記録装置 |
JP2004219795A (ja) * | 2003-01-16 | 2004-08-05 | Fuji Photo Film Co Ltd | 熱現像感光材料およびその画像形成方法 |
Family Cites Families (2)
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JP3296482B2 (ja) * | 1998-08-13 | 2002-07-02 | 富士写真フイルム株式会社 | 熱現像装置 |
US7112402B2 (en) * | 2003-01-16 | 2006-09-26 | Fuji Photo Film Co., Ltd. | Photothermographic material |
-
2005
- 2005-10-28 JP JP2006542338A patent/JP4363445B2/ja not_active Expired - Fee Related
- 2005-10-28 EP EP05799238A patent/EP1808730A1/en not_active Withdrawn
- 2005-10-28 WO PCT/JP2005/019890 patent/WO2006049099A1/ja active Application Filing
- 2005-10-28 CN CN2005800369161A patent/CN101048701B/zh not_active Expired - Fee Related
- 2005-11-02 US US11/263,868 patent/US7281868B2/en not_active Expired - Fee Related
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2000284456A (ja) * | 1999-03-31 | 2000-10-13 | Fuji Photo Film Co Ltd | 熱現像装置 |
JP2004212565A (ja) * | 2002-12-27 | 2004-07-29 | Fuji Photo Film Co Ltd | 画像記録装置 |
JP2004219795A (ja) * | 2003-01-16 | 2004-08-05 | Fuji Photo Film Co Ltd | 熱現像感光材料およびその画像形成方法 |
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Publication number | Publication date |
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CN101048701B (zh) | 2012-05-09 |
US7281868B2 (en) | 2007-10-16 |
US20060099537A1 (en) | 2006-05-11 |
EP1808730A1 (en) | 2007-07-18 |
CN101048701A (zh) | 2007-10-03 |
JPWO2006049099A1 (ja) | 2008-05-29 |
JP4363445B2 (ja) | 2009-11-11 |
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