WO1998030399A1 - Laser-imageable recording constructions utilizing controlled, self-propagating exothermic chemical reaction mechanisms - Google Patents
Laser-imageable recording constructions utilizing controlled, self-propagating exothermic chemical reaction mechanisms Download PDFInfo
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- WO1998030399A1 WO1998030399A1 PCT/US1998/000398 US9800398W WO9830399A1 WO 1998030399 A1 WO1998030399 A1 WO 1998030399A1 US 9800398 W US9800398 W US 9800398W WO 9830399 A1 WO9830399 A1 WO 9830399A1
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- layer
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- substrate
- ignition
- titanium
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41C—PROCESSES FOR THE MANUFACTURE OR REPRODUCTION OF PRINTING SURFACES
- B41C1/00—Forme preparation
- B41C1/10—Forme preparation for lithographic printing; Master sheets for transferring a lithographic image to the forme
- B41C1/1008—Forme preparation for lithographic printing; Master sheets for transferring a lithographic image to the forme by removal or destruction of lithographic material on the lithographic support, e.g. by laser or spark ablation; by the use of materials rendered soluble or insoluble by heat exposure, e.g. by heat produced from a light to heat transforming system; by on-the-press exposure or on-the-press development, e.g. by the fountain of photolithographic materials
- B41C1/1033—Forme preparation for lithographic printing; Master sheets for transferring a lithographic image to the forme by removal or destruction of lithographic material on the lithographic support, e.g. by laser or spark ablation; by the use of materials rendered soluble or insoluble by heat exposure, e.g. by heat produced from a light to heat transforming system; by on-the-press exposure or on-the-press development, e.g. by the fountain of photolithographic materials by laser or spark ablation
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
- B41M5/00—Duplicating or marking methods; Sheet materials for use therein
- B41M5/24—Ablative recording, e.g. by burning marks; Spark recording
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S430/00—Radiation imagery chemistry: process, composition, or product thereof
- Y10S430/146—Laser beam
Definitions
- the present invention relates to digital printing apparatus and methods, and more particularly to lithographic printing plate constructions that may be imaged on- or off-press using digitally controlled laser output.
- the '698 patent discloses laser- imageable plates that utilize thin-metal ablation layers which, when exposed to an imaging pulse, are vaporized and/or melted even at relatively low power levels .
- the remaining unimaged layers are solid and durable, typically of polymeric or thicker metal composition, enabling the plates to withstand the rigors of commercial printing and exhibit adequate useful lifespans.
- the plate construction includes a first, topmost layer chosen for its affinity for (or repulsion of) ink or an ink-abhesive fluid. Underlying the first layer is a thin metal layer, which ablates in response to imaging (e.g., infrared, or "IR" ) radiation.
- imaging e.g., infrared, or "IR"
- a strong, durable substrate underlies the metal layer, and is characterized by an affinity for (or repulsion of) ink or an ink-abhesive fluid opposite to that of the first layer.
- Ablation of the absorbing 0 second layer by an imaging pulse weakens the topmost layer as well.
- the topmost layer is rendered easily removable in a post-imaging cleaning step. This, once again, creates an image spot having an affinity for ink s or an ink-abhesive fluid differing from that of the unexposed first layer.
- the polymeric topmost coatings ordinarily required for the sandwiched-ablation-layer approach may exhibit less durability than traditional printing plates.
- conventional, photoexposure-type wet plates may utilize a heavy aluminum surface capable of surviving hundreds of thousands of impressions.
- Sandwiched-ablation-layer plates by contrast, utilize polymeric topcoats that pass laser radiation through to the ablation layer.
- Hydrophilic polymers such as polyvinyl alcohols, do not 0 exhibit the durability of metals .
- ablation the very concept of ablation, whether or not the laser-responsive layer is sandwiched or exposed, poses challenges in terms of plate fabrication and system performance demands.
- Commercially feasible s printing or platemaking apparatus generally utilize low- power lasers; consequently, the ablation layer must undergo catastrophic degradation as a result of limited energy input.
- Such layers must, therefore, be very thin (on the order of angstroms) or highly combustible (e.g., o self-oxidizing). In the former case, it may be difficult to consistently obtain uniform, well-adhered ablation layers.
- the sandwiched ablation layer is metal, a careful balance must be struck between reflection, absorption and transmission of imaging 5 radiation.
- metal/non-metal combinations e.g., metal oxides
- Rigidity too, increases with layer thickness, and excessively thick metal/non-metal layers will be vulnerable to fracture; for example, dimensional stress leading to fracture can occur as a result of heating and cooling, as when a thermoset coating is applied over such a layer and cured.
- a printing plate with an imaging layer damaged in this way will exhibit poor durability and possibly a loss of image quality.
- Self-oxidizing layers such as those based on nitrocellulose (see, e.g., Canadian Patent No. 1,050,805), tend to exhibit limited or variable shelf- s life, and may also be vulnerable to pH changes.
- the present invention utilizes, as imaging layers, certain solid materials that undergo self-propagating o exothermic solid-solid reaction upon ignition by a heating source (e.g., a laser).
- a heating source e.g., a laser
- the self-propagating nature of the reaction offers a number of advantages. First, only the surface of the material need be heated to the ignition temperature to effect complete 5 consumption of an entire plug of material beneath (and generally larger in area than) the heated surface. Second, and as a result, the thickness of the ablation layer need not be limited (or otherwise adjusted) to the accommodate the imaging device; instead, thickness can o be tailored to optimize performance characteristics
- the invention comprises a recording construction directly imageable by heating (e.g., by application of laser radiation) and having at least one ignition layer comprising at least two unreacted, solid chemical species which, upon exposure to heat (e.g., through absorption of laser radiation), combine exothermically to form a final species which is physically disrupted — that is, removed (e.g., through volatilization) or rendered vulnerable to removal in the course of press roll-up or through a separate cleaning step; and a substrate thereunder that is substantially unconsumed (although possibly altered in a manner improving ink adsorption) by heat generated by the exothermic combination.
- the recording construction can serve as a printing plate (e.g., lithographic or flexographic ) , a photomask, a proofing sheet or other graphic-arts construction depending on choice of materials and the addition of further layers.
- the applied heat necessary to induce disruption is largely independent of the overall thickness of the ignition layer.
- the thickness does, however, strongly influence the areawise amount of material disrupted by an imaging pulse.
- the combustion reaction spreads outwardly as it progresses depthwise through the thickness of the ignition layer; accordingly, as the ignition layer grows in thickness, the overall area disrupted by an imaging pulse of constant area expands.
- This relationship between disrupted area and thickness may be used to control the size of image spots produced, for example, by a laser having a given beam diameter. Because the amount of energy needed to initiate reaction remains substantially constant regardless of the affected area, the ability to reduce beam diameter translates into smaller laser power requirements and, generally, increased throughput.
- the optimal layer thickness for a given application is straightforwardly determined by those of ordinary skill in the art without undue experimentation.
- the substrate is transparent, while the ignition layer (or layers) is opaque (or has an opaque overcoat), to actinic radiation.
- Imagewise ablation of the ignition layer reveals the transparent layer in a pattern corresponding to the image (or its negative), and the photomask can be used, for example, to prepare a printing plate or proofing material by conventional photoexposure .
- the construction is analogous to that of the just-described photomask; the ignition layer is a single layer or a series of adjacent layers overlying a substrate that is transparent or colored differently from the ignition layer (or its topmost component, or a sacrificial layer thereover).
- the ignition layer (or its topmost component) and the substrate exhibit different affinities for ink and/or an abhesive fluid for ink.
- the topmost ignition layer may be hydrophilic (in the printing sense of exhibiting affinity for fountain solution) and the substrate oleophilic; for example, the topmost layer may be titanium with a layer of carbon (e.g., graphite) disposed thereunder, ignition of the titanium producing an exothermic reaction with the underlying carbon to form physically disrupted TiC.
- a separate surface layer is disposed above the ignition layer (or layers).
- the surface layer that exhibits an affinity different from that of the substrate for ink and/or an abhesive fluid for ink.
- the surface layer may be hydrophilic and the substrate oleophilic, or the surface layer may instead be oleophobic and the substrate oleophilic.
- the ignition layer may comprise, for example, separate layers of titanium and carbon, or a single layer containing an unreacted mixture of titanium and carbon.
- any of the foregoing constructions may comprise a tying layer for anchoring the bottommost ignition layer to the substrate, the tying layer being physically disrupted by the exothermic combination.
- Such alternatives include aluminum and palladium, molybdenum and silicon, molybdenum and at least one chalcogenide, titanium and nickel, hafnium and carbon, silicon and carbon, titanium and silicon, tantalum and carbon, niobium and carbon, barium oxide and silicon oxide, and barium oxide and titanium oxide.
- FIG. 1 is an enlarged sectional view of a general recording construction having at least a substrate and, disposed thereon, a series of layers that undergo exothermic, self-propagating combustion, and a metallic inorganic surface layer;
- FIG. 2 is an enlarged sectional view of a lithographic plate embodying the invention and having a substrate, a series of layers that undergo exothermic, self-propagating combustion, and a polymeric surface layer.
- a first embodiment of the present invention includes a substrate 100, a layer or series of layers 105 that undergo self-propagating exothermic solid-solid reaction upon ignition of one of the layers, and, optionally, a surface layer 107 whose identity, thickness and function depends on the application.
- layers 105 include a 100 A layer 110 of titanium, a 100 A layer 112 of graphite, and a second 100 A layer 114 of titanium.
- Layer 107 is a refractory layer that exhibits hydrophilicity, and may be a 300 A layer of titanium nitride.
- Substrate 100 is preferably strong, stable and flexible, and may be a polymer film, or a paper or metal sheet.
- Polyester films in a preferred embodiment, the MYLAR film sold by E.I. duPont de Nemours Co., Wilmington, DE, or, alternatively, the MELINEX film sold by ICI Films, Wilmington, DE) furnish useful examples.
- a preferred polyester-film thickness is 0.007 inch, but thinner and thicker versions can be used effectively.
- the optimal thickness of a polymer layer is determined primarily by the environment of use; for example, if the material is to be stored in a bulk roll within the interior of a plate cylinder and incrementally advanced around the exterior of the cylinder by a winding mechanism, flexibility will be more important than dimensional stability; thicknesses on the order of 0.007 inch are suitable for such applications .
- Paper substrates are typically "saturated" with polymerics to impart water resistance, dimensional stability and strength.
- Aluminum is a preferred metal substrate. Ideally, the aluminum is polished so as to reflect any imaging radiation penetrating any overlying optical interference layers, and the construction includes apporpriate thermal insulation.
- IR-reflective substrate is the white 329 film supplied by ICI Films, Wilmington, DE, which utilizes IR-reflective barium sulfate as the white pigment.
- a preferred thickness is 0.007 inch, or 0.002 inch if the construction is laminated onto a metal support.
- Layer 107 is a hard, durable, hydrophilic layer disposed above a layers 105, and preferably above a metal layer 114, since the latter tends to improve overall adhesion.
- a finishing treatment 120 as described below, may be applied to layer 107.
- Layer 107 is a metallic inorganic layer comprising a compound of at least one metal with at least one non- metal, or a mixture of such compounds. Layer 107 ablatively absorbs imaging radiation, or passes sufficient radiation to overheat underlying layer 114 and thereby induce self-propagating combustion of layers 105, which will also ablate the region of layer 107 upon which radiation was incident (if the radiation was not itself sufficient to do so). Layer 107 may be applied at a thickness of 100-2000 A. Accordingly, the choice of material for layer 107 is critical, since it must serve as a printing surface in demanding commercial printing environments, yet ablate in response to imaging radiation.
- the metal component of layer 107 may be a d-block (transition) metal, an f-block (lanthanide) metal, aluminum, indium or tin, or a mixture of any of the foregoing (an alloy or, in cases in which a more definite composition exists, an intermetallic) .
- Preferred metals include titanium, zirconium, vanadium, niobium, tantalum, molybdenum and tungsten.
- the non- metal component of layer 107 may be one or more of the p-block elements boron, carbon, nitrogen, oxygen and silicon.
- a metal/non-metal compound in accordance herewith may or may not have a definite stoichiometry, and may in some cases (e.g., Al-Si compounds) be an alloy.
- Preferred metal/non-metal combinations include TiN, TiON, TiO x (where 0.9 ⁇ x ⁇ 2.0), TiAlN, TiAlCN, TiC and TiCN.
- the material forming layer 120 preferably comprises a polyalkyl ether compound with a molecular weight that depends on the mode of application and the conditions of plate fabrication.
- the polyalkyl ether compound when applied as a liquid, may have a relatively substantial average molecular weight (i.e., at least 600) if the plate undergoes heating during fabrication or experiences heat during storage or shipping; otherwise, lower molecular weights are acceptable.
- a coating liquid should also exhibit sufficient viscosity to facilitate even coating at application weights appropriate to the material to be coated.
- a preferred formulation for aqueous coating comprises 80 wt% polyethylene glycol (PEG) with an average molecular weight of about 8000 combined with 20 wt% hydroxypropyl cellulose to serve as a thickener.
- PEG polyethylene glycol
- a formulation according to this specification was prepared by combining 4.4 parts by weight (“pbw”) of Pluracol
- the polyalkyl ether can be replaced with a polyhydroxyl compound, a polycarboxylic acid, a polysulfonamide or a polysulfonic acid or o mixtures thereof.
- Gum arabic or the gumming agents found in commercial plate finishers and fountain solutions can also be used to provide the protective layer.
- the TRUE BLUE plate cleaning material and the VARN TOTAL fountain solution supplied by Varn Products 5 Company, Oakland, NJ are also suitable for this purpose.
- the protective layer 120 is preferably applied at a minimal thickness consistent with its roles, i.e., providing protection against handling and environmental damage, extending plate shelf life by shielding the plate from airborne contaminants, and entraining debris produced by imaging.
- the thinner layer 120 can be made, the more quickly it will wash off during press make- ready, the shorter will be the roll-up time, and the less the layer will affect the imaging sensitivity of the plate. Keeping layer 120 thin also minimizes contamination of fountain solution, or upset of the balance between fountain solution and ink.
- the combustion reactants can instead be mixed, in an unreacted solid (generally powdered) form, and applied as a single layer.
- the materials of layers 105 may include such alternatives as aluminum and palladium, molybdenum and silicon, molybdenum and at least one chalcogenide, titanium and nickel, hafnium and carbon, silicon and carbon, titanium and silicon, tantalum and carbon, niobium and carbon, barium oxide and silicon oxide, and barium oxide and titanium oxide.
- Layers 105 can also include mixtures of these sets of materials in single or discrete layers.
- topmost layer 105 i.e., layer 114 in FIG. 1
- layer 107 it may be possible to eliminate layer 107.
- titanium layer 114 when exposed to air, develops a native oxide surface that accepts fountain solution and can therefore serve as a printing surface.
- Finishing layer 120 can be applied directly to a titanium/titanium oxide layer serving as a printing surface.
- the constituents of layers 105 may be applied by vacuum evaporation or sputtering (e.g., with argon); it is preferred to vacuum sputter onto a plasma-treated polyester substrate 100.
- a titanium nitride layer 107 may be applied, for example, by reactively sputtering titanium in an atmosphere of argon and nitrogen.
- the construction may be imaged in accordance, for example, with the '092 patent; one or more diode lasers emitting in the near-IR region are scanned over the surface of the plate and actuated in an imagewise pattern, thereby causing combustion and ablation of the layers overlying substrate 100 in spots corresponding to image portions of the construction.
- unremoved portions of layer 107 accept fountain solution, while exposed portions of substrate 100 accept ink. Because of the intense nature of the combustion reaction and the very small overall thickness of layers 105, little debris is generated as a consequence of imaging.
- the use of a finishing layer 120 obviates the need for any separate cleaning step, since whatever debris remains will be entrained in layer 120, which is itself removed during press roll-up.
- the construction can be formed as a photomask.
- layer 107 may be eliminated, and the necessary opacity to actinic radiation provided by layers 105. Because these layers all participate in a self-propagating combustion reaction, it is not necessary to restrict the overall thickness to conform to imaging power limitations, so the fabricator is free to use as many layers 105 as are appropriate to the application; of course, a layer 107 of particularly high opacity can be employed in order to limit the number of layers 105 if this is desired.
- Substrate 100 is transparent to actinic radiation, so selective, imagewise removal of layers 105 (by heating, e.g., with low-power, near-IR imaging radiation) produces a photomask that can be used in the exposure of, for example, a traditional, photochemically developed printing plate or proofing material.
- layer 107 contrasts in color with substrate 100; alternatively, substrate 100 can be transparent.
- FIG. 2 illustrates a second embodiment of the invention directed toward lithographic printing.
- the construction includes a substrate 200 and a stack of ignition layers 205.
- the top layer 230 is a polymeric coating that exhibits an affinity for fountain solution and/or ink different from that of substrate 200.
- surface layer 230 is a silicone polymer or fluoropolymer that repels ink, while substrate 100 is an oleophilic polyester or aluminum material; the result is a dry plate.
- surface layer 230 is a hydrophilic material such as a polyvinyl alcohol (e.g., the Airvol 125 material supplied by Air Products, Allentown, PA), while substrate 100 is both oleophilic and hydrophobic (again, polyester is suitable) .
- a hydrophilic material such as a polyvinyl alcohol (e.g., the Airvol 125 material supplied by Air Products, Allentown, PA)
- substrate 100 is both oleophilic and hydrophobic (again, polyester is suitable) .
- a titanium layer 205 immediately benath layer 230 (i.e., as the layer onto which layer 230 is coated) .
- an underlying titanium layer offers substantial advantages over other metals. Coating an addition-cured silicone over a titanium layer results in enhancement of catalytic action during cure, promoting substantially complete cross-linking; and may also promote further bonding reactions even after cross-linking is complete. These phenomena strengthen the silicone and its bond to the titanium layer, thereby enhancing plate life (since more fully cured silicones exhibit superior durability), and also provide resistance against the migration of ink- borne solvents through the silicone layer (where they can degrade underlying layers ) . Catalytic enhancement is especially useful where the desire for high-speed coating (or the need to run at reduced temperatures to avoid thermal damage to the ink-accepting support) make full cure on the coating apparatus impracticable; the presence of titanium will promote continued cross- linking despite temperature reduction.
- suitable silicone materials are applied using a wire-wound rod, then dried and heat- cured to produce a uniform coating deposited at, for example, 2 g/m 2 .
- suitable materials are typically produced by hydrolysis of polyvinyl acetate polymers. The degree of hydrolysis affects a number of physical properties, including water resistance and durability.
- the polyvinyl alcohols used in the present invention reflect a high degree of hydrolysis as well as high molecular weight.
- Effective hydrophilic coatings are sufficiently crosslinked to prevent redissolution as a result of exposure to fountain solution, but also contain fillers to produce surface textures that promote wetting. Selection of an optimal mix of characteristics for a particular application is well within the skill of practitioners in the art.
- Useful polyvinyl-alcohol surface coatings may be applied, for example, using a wire-wound rod, followed by drying for 1 min at 300 °F in a convection oven to application weight of 1 g/m 2 .
- Laser output generally passes through layer 230 and heats the topmost layer 205, initiating ignition and self-propagating combustion. Ablation of layers 205 weakens or removes layer 230 as well. If not entirely removed, the weakened surface coating 230 (and any debris remaining from destruction of the absorbing second layer) is removed in a post-imaging cleaning step. In particular, such cleaning can be accomplished using a contact cleaning device such as a rotating brush (or other suitable means as described, for example, in
- any of the foregoing constructions used as lithographic printing plates can, if desired, by laminated to a metal support as set forth, for example, in the '032 patent and U.S. Patent No. 5,570,636, the entire disclosure of which is hereby incorporated by reference.
- a purple, laser-imageable lithographic printing plate in accordance with FIG. 1 was prepared in a vacuum chamber by reactively plasma etching a polyester sheet in an argon/nitrogen atmosphere, followed by successive sputter depositions of a 100 A layer of titanium, a 100 A layer of graphite, a 100 A layer of titanium, and a 300 A layer of titanium nitride.
- the plate was imaged using a Presstek PEARL platesetter (a computer-to-plate imagesetter utilizing diode lasers as discussed above) with an imaging laser flux of about 200 mJ/cm 2 . Used as a wet plate on a printing press, the plate exhibited a useful life — that is, the number of impressions achieved before any noticeable print image degradation — of over 100,000 impressions.
- a blue-colored, laser-imageable lithographic printing plate was prepared by repeating the procedure set forth in Example 1 with the exception of increasing the thickness of the titanium nitride layer to 600 A. Imaged as set forth in Example 1, the plate exhibited a useful life in excess of 100,000 impressions.
- a gray-green, laser-imageable lithographic printing plate was prepared in a vacuum chamber by reactively plasma etching a polyester sheet in an argon/nitrogen atmosphere, followed by successive sputter depositions of a 50 A layer of titanium, a 50 A layer of graphite, a 50 A layer of titanium, a 50 A layer of graphite, a 50 A layer of titanium, a 50 A layer of graphite, and finally a 300 A layer of titanium nitride. Imaged as set forth in Example 1, the plate exhibited a useful life in excess of 100,000 impressions.
- a dry laser-imageable lithographic printing plate in accordance with FIG. 2 is prepared in a vacuum chamber by reactively plasma etching a polyester sheet in an argon/nitrogen atmosphere, followed by successive sputter depositions of a 50 A layer of titanium, a 50 A layer of graphite, a 50 A layer of titanium, a 50 A layer of graphite, a 50 A layer of titanium, a 50 A layer of graphite.
- This structure is overcoated with the silicone formulation described in U.S. Patent No. 5,487,338 (Examples 1-7); the silicone is applied by solvent to a dry coat weight of about 2 g/m 2 and then cured, after which the plate is imaged and used to print copy on a waterless press.
- a wet laser-imageable lithographic printing plate in accordance with FIG. 2 is prepared in a vacuum chamber by reactively plasma etching a polyester sheet in an argon/nitrogen atmosphere, followed by successive sputter depositions of a 50 A layer of titanium, a 50 A layer of graphite, a 50 A layer of titanium, a 50 A layer of graphite, a 50 A layer of titanium, a 50 A layer of graphite.
- This structure is overcoated with the polyvinyl alcohol formulation described in U.S. Patent No.
Abstract
Description
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Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP10531120A JP2000507178A (en) | 1997-01-13 | 1998-01-12 | Laser-imageable recording structure using controlled self-propagating exothermic chemical reaction mechanism |
AU59112/98A AU717700B2 (en) | 1997-01-13 | 1998-01-12 | Laser-imageable recording constructions utilizing controlled, self-propagating exothermic chemical reaction mechanisms |
EP98902452A EP0889787A1 (en) | 1997-01-13 | 1998-01-12 | Laser-imageable recording constructions utilizing controlled, self-propagating exothermic chemical reaction mechanisms |
CA002246542A CA2246542C (en) | 1997-01-13 | 1998-01-12 | Laser-imageable recording constructions utilizing controlled, self-propagating exothermic chemical reaction mechanisms |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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US08/782,625 | 1997-01-13 | ||
US08/782,625 US5786129A (en) | 1997-01-13 | 1997-01-13 | Laser-imageable recording constructions utilizing controlled, self-propagating exothermic chemical reaction mechanisms |
Publications (1)
Publication Number | Publication Date |
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WO1998030399A1 true WO1998030399A1 (en) | 1998-07-16 |
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Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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PCT/US1998/000398 WO1998030399A1 (en) | 1997-01-13 | 1998-01-12 | Laser-imageable recording constructions utilizing controlled, self-propagating exothermic chemical reaction mechanisms |
Country Status (6)
Country | Link |
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US (1) | US5786129A (en) |
EP (1) | EP0889787A1 (en) |
JP (1) | JP2000507178A (en) |
AU (1) | AU717700B2 (en) |
CA (1) | CA2246542C (en) |
WO (1) | WO1998030399A1 (en) |
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US5906909A (en) * | 1997-01-06 | 1999-05-25 | Presstek, Inc. | Wet lithographic printing constructions incorporating metallic inorganic layers |
US5924364A (en) * | 1997-01-17 | 1999-07-20 | Agfa-Gevaert N.V. | Laser-imagable recording material and printing plate produced therefrom for waterless offset printing |
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1997
- 1997-01-13 US US08/782,625 patent/US5786129A/en not_active Expired - Lifetime
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1998
- 1998-01-12 AU AU59112/98A patent/AU717700B2/en not_active Ceased
- 1998-01-12 EP EP98902452A patent/EP0889787A1/en not_active Withdrawn
- 1998-01-12 CA CA002246542A patent/CA2246542C/en not_active Expired - Fee Related
- 1998-01-12 JP JP10531120A patent/JP2000507178A/en active Pending
- 1998-01-12 WO PCT/US1998/000398 patent/WO1998030399A1/en not_active Application Discontinuation
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Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0941839A2 (en) * | 1998-03-09 | 1999-09-15 | Fuji Photo Film Co., Ltd. | Radiant ray-sensitive lithographic printing plate precursor |
EP0941839A3 (en) * | 1998-03-09 | 2001-01-24 | Fuji Photo Film Co., Ltd. | Radiant ray-sensitive lithographic printing plate precursor |
Also Published As
Publication number | Publication date |
---|---|
CA2246542A1 (en) | 1998-07-16 |
AU5911298A (en) | 1998-08-03 |
EP0889787A1 (en) | 1999-01-13 |
AU717700B2 (en) | 2000-03-30 |
JP2000507178A (en) | 2000-06-13 |
CA2246542C (en) | 2004-07-27 |
US5786129A (en) | 1998-07-28 |
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