子分类：
| 序号 | 专利名 | 申请号 | 申请日 | 公开（公告）号 | 公开（公告）日 | 发明人 |
|---|---|---|---|---|---|---|
| 141 | Etching solution for etching of photopolymeric films | US420480 | 1982-09-20 | US4409115A | 1983-10-11 | Manfred A. J. Sondergeld |
| Etching solution for dot etching photopolymerized materials which comprises an organic polymeric binder having alkali soluble groups, monomer and photoinitiator, the material having an optical density in the actinic region of at least 1.0, wherein a water-soluble salt of a water-insoluble polymeric polycarboxylic acid whose acid strength is the same or less than that of the binder is present as the etching agent. | ||||||
| 142 | Correction circuit of a halftone dot area rate detector | US320096 | 1981-11-10 | US4400617A | 1983-08-23 | Yasuhiro Yonekura |
| A correction circuit of a halftone dot area rate detector wherein a relation between a detected halftone dot area rate and a light transmittance or reflectance of an object obtained by a halftone photography is approximately expressed by a turning curve having at least one turning point, which comprises line segments, by using a turning point correction circuit comprising an inverting amplifying circuit, wherein another inverting amplifying circuit is coupled in parallel with the turning point correction circuit, and wherein a potensiometer couples the outputs of the two circuits and outputs a signal corresponding to a correction amount. | ||||||
| 143 | Method of controlling the contrast by reproduction such as screen reproduction | US251047 | 1981-04-06 | US4378157A | 1983-03-29 | Richardt Norgaard; Vagn N. Rasmussen |
| A method of controlling the contrast by reproduction such as screen reproduction, e.g. screen reproduction of halftone pictures by means of a main exposure and an auxiliary exposure, whereby the density both in the lightest and in the darkest field of the picture and consequently the contrast range of the halftone picture are first measured by means of a densitometer, whereafter the ratio of the lightest spot of the background chosen to the lightest spot of the original is measured and the main exposure is adjusted in response thereto. According to the invention a slider is on the basis of the screen range adjusted in a table indicating the flash percentage versus the screen range and the image range, whereby the flash percentage is automatically measured on the basis of a signal value corresponding to the image range. In this manner references to tables are avoided without using calculating units. | ||||||
| 144 | Dot percentage measuring device | US190171 | 1980-09-23 | US4371265A | 1983-02-01 | Yuji Mitsuhashi |
| In printing with dots, a dot percentage is one of the important factors which determine the quality of a printed matter, and accordingly it is essential to control the dot percentage throughout the printing process from makeup to printing. In order to readily and quickly measure the dot percentage with high accuracy, a microscope section and a display section are formed as one unit, and a correction circuit for light transmittance is provided. | ||||||
| 145 | Photographic light-sensitive silver halide elements | US197358 | 1980-10-15 | US4343873A | 1982-08-10 | Senzo Sasaoka |
| A photographic light-sensitive silver halide element is described comprising a support, at least one light-sensitive silver halide emulsion layer and a light-scattering layer. This element is used for forming a dot image by a photographic exposure using laser through a contact screen. The light-scattering layer is provided in such a manner that the silver halide emulsion layer is exposed to laser through the light-scattering layer. | ||||||
| 146 | Dot-etchable masks from photopolymerizable elements | US802511 | 1977-06-01 | US4173673A | 1979-11-06 | Martin D. Bratt; Abraham B. Cohen |
| Photopolymerizable elements are described comprising a sheet support, a photopolymerizable layer having a thickness of, at most, 0.0006 inch (0.015 mm.) and an optical density of at least 3.0 in the actinic region. Resist images made from these elements may be etched by a process of chemically undercutting the image areas and then spraying or rubbing them. The elements are useful as contact speed lithographic films and for other graphic arts applications. | ||||||
| 147 | High resolution halftone microimages and method therefor | US869619 | 1978-01-16 | US4153457A | 1979-05-08 | Truman F. Kellie |
| High resolution microimages of continuous tone photographs must be prepared in halftone form to enable inexpensive duplication of the microimages by conventional graphic arts processes. The halftone pattern in such microimages must have a spatial frequency of not less than about 40 line pairs per millimeter in order to enable the projection of an acceptably detailed enlarged image. In the present invention, such halftone microimages are prepared using an ultra-high resolution gradient density screen having therein an image of an interference fringe field resulting from an exposure of a preform of the screen to two interferring mutually coherent beams of radiation. | ||||||
| 148 | Lithographic printing process | US511293 | 1974-10-02 | US4011085A | 1977-03-08 | Sidney L. Rapoport; Douglas F. Mitchell |
| An improved two printing step process for reproducing visual subject matter including the making of a secondary printing plate with a positive image random pattern screen and printing a substrate sequentially and in registry with the secondary printing plate and a master printing plate made with a conventional half tone screen. The random pattern screen is a positive image phototransparency having a large plurality of irregularly shaped highlight areas and contrasting shadow areas per square inch, an optical density from about 0.17 to about 1.6, a contrast factor from about 0.75 to about 1.5 and a transparency factor from about 0.25 to about 0.60. The random pattern screen is made from a transparent plate having light disruptive projections on its surface. A negative and a positive phototransparency of the transparent plate are made while controlling exposure and developing conditions to produce a positive image screen having the desired characteristics. | ||||||
| 149 | Process for preparing reflection replica used in optical processing system | US3563743D | 1967-06-28 | US3563743A | 1971-02-16 | COOK SAM P |
| A PROCESS FOR IMPROVING THE QUALTY OF THE REFLECTION REPLICA USED IN THE OPTICAL DATA PROCESSING SYSTEM DESCRIBED IN THE COPENDING APPLICATION OF S.P. COOK, SERIAL NO. 451,795, NOW PATENT NO. 3,438,693. THE IMPROVED REFLECTION REPLICA IS OBTAINED A FLAT, REFLECTIVE SURFACE WITH A PHOTOSENSITIVE PLASTIC MATERIAL AND THEN EXPOSING THE COATED SURFACE TO LIGHT THAT PASSES THROUGH BOTH A TRANSPARENT DISPLAY OF THE INFORMAION-CONTAINING PATTERN AND A LIGHT-DIFFUSING SCREEN, SUCH AS A HALFTONE SCREEN. THE PHOTOSENSITIVE COATING IS THEN DEVELOPED SO THAT THE PORTION OF THE PHOTOSENSITIVE COATING THAT REMAINS IS PERMEATED BY THE IRREGULARITIES CORRESPONDING TO THE PATTERN OF THE SCREEN.
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| 150 | Continuous prescreening of film | US6915460 | 1960-11-14 | US3110594A | 1963-11-12 | HOWE DONALD J; MAURER RICHARD E |
| 151 | Drop-out process for halftone photography | US81775559 | 1959-06-03 | US3031303A | 1962-04-24 | HUTTKAY ARTHUR L |
| 152 | Half-tone visual film scanner | US77874258 | 1958-12-08 | US2985088A | 1961-05-23 | PHILIP TAYLOR |
| 153 | Light-sensitive film prescreened by herschel exposure | US40992354 | 1954-02-12 | US2912325A | 1959-11-10 | MAURER RICHARD E |
| 154 | Optically sensitized prescreened photographic material | US23433251 | 1951-06-29 | US2742833A | 1956-04-24 | EVANS RALPH M; STAUFFER ROBERT E; YUTZY HENRY C |
| 155 | Photographic light-sensitive material for making halftones | US29162352 | 1952-06-04 | US2691586A | 1954-10-12 | YULE JOHN A C; MAURER RICHARD E |
| 156 | Prescreened photographic film employing albert reversal | US21681751 | 1951-03-21 | US2691583A | 1954-10-12 | MAURER RICHARD E |
| 157 | Medium for use in making camera copy and method of preparing the same | US4505848 | 1948-08-19 | US2601161A | 1952-06-17 | MCINTOSH MAURICE D |
| 158 | Indirect photomechanical reproduction | US59428745 | 1945-05-17 | US2507431A | 1950-05-09 | GODDARD ANNE F |
| 159 | Medium for use in making camera copy and method of preparing the same | US33621140 | 1940-05-20 | US2301900A | 1942-11-10 | MCINTOSH MAURICE D |
| 160 | Media, process for the representation of figures, designs, drawings, etc., thereon and method of making said media | US24342038 | 1938-12-01 | US2224654A | 1940-12-10 | MCINTOSH MAURICE D |
| 536,831. Pictures. SANDERS, L. S. Nov. 27, 1939, No. 30901. Convention date, Dec. 1, 1938. Drawings to Specification. [Class 11] [Also in Group XX] Drawing material suitable for the production of representations for use as camera copy comprises a transparent or opaque support, a chemically developable layer, a thin transparent or translucent gum or resin layer soluble in or penetrable by the developer, and a coating of transparent or translucent material insoluble in and penetrable by the developer on the film and having a multiplicity of spaced openings. A dull surface transparent or translucent coating insoluble in but penetrable by the developer may be provided. In an example, a suspension of mercurous chloride in gelatine containing also sodium metatungstate and formaldehyde is applied to a paper support. A thin film of gum or resinous material is applied, the gum being benzoin, ammoniac, sandarac, galbanum, olibanum. mastic, copal and dammer. A varnish film insoluble in and impenetrable by the developer is applied by printing to leave the small spaced openings. The surface coating comprises either (a) an aqueous-alcoholic solution of gum mastic and gum dammer, (b) an aqueous-alcoholic solution of cherry gum and gum galbanum or (c) an aqueous solution of albumen followed by after-treatment with sorbitol. The cherry gum may be replaced by other water soluble substances. The developers are applied with a brush by an artist. The slow developer employed first comprises an aqueous solution of thiourea and sodium sulphate. The fast developer comprises an aqueous solution of thiourea, ethylenediamine, phenolphthalein (or o-cresolphthalein) and urea, to which has been added a small quantity of alcoholic shellac solution. The solution is coloured a dark red which disappears on drying. The ethylenediamine may be replaced by alkali hydroxides or salts, ammonia, propylenediamine, monoethenolamine, benzylamine, or piperidine. The developable substance may comprise silver chloride which is developable by reducing agents or amines. A silver chloride, bromide, or iodide photographic printing paper may be exposed, photographically developed and fixed and bleached in mercuric chloride solution to give suitable developable material. Material having a transparent support may be used for tracing particularly for use in the production of colour plates, or when developed may be used as photographic negatives. Specification 522,782, [Group XXXV], is referred to. | ||||||
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