Патент USA US2112010код для вставки
March 22, 1938. l. BRIMBERG 2,112,010 APPARATUS FOR PRODUCING PRINTING‘ PLATES Fialed Oct. 28, 1929 V : ‘ q‘ ' " vIVENTOR. 4,4, (3W I I BY . 4 , 3/ ,1 7,’ A TTORNEY. Patented Mar. 22, 1938 *‘ UNITED STATES _ 2,112,010 PATENT OFFICE 2,112,010 APPARATUS non PRODUCING ram'rmo rLA'rEs I Isaac Brimberg, Brooklyn, N. Y. Application October 28, 1929, Serial No. 402,963 12 Claims. (Cl. 178—6.6) This invention relates'to a novel method of an apparatus for making black and white or colored half-tone pictures in such a manner as to elimi nate the'steps of engraving and etching in the 5 making of half-tone plates for newspapers. In half-tone pictures as now made and in the making of newspaper pictures they are formed with a series of black dots on white areas and in the darker portions of the picture are white dots 10 in, black areas and graduations from a round black dot to a round white dot causes the black dot to have more of a square contour. In accordance with this invention half-tones are produced by providing a variable dot fre 15 quency. In other words, in the white portions are dots which are widely spaced and in the dark the number of dots per inch by varying the fre quency of the oscillator, it being understood that one is not limited in any way to the frequency of the oscillator or the frequency for light or dark portions of the picture. ' Other novel features of construction and ad vantage and objects of the invention will herein after more clearly appear in the detailed descrip tion and the appended claims. - With the foregoing in view, my invention com- 10 prehends a novel method of’ and apparatus for producing facsimiles, and plates for printing pic tures in any desired color, and pictures and plates resulting from such method. v It further comprehends a novel method and 15 apparatus for making a printing plate having portions the dots are very close to each other. In varying dot frequencies. order to produce such result these dots are, not It further comprehends a novel method of mak round but preferably form‘ a square‘ with indeni ing half-tone pictures on metal or mat. : 20 tations in each side. This square arrangement It further comprehends a. novel method of 20 of the dots enables one to obtain a denser black. The dot.former consists of a needle or tool hav ing its operative end in the form of a square with tits sides slightly indented, or any other desired 25 shape that will make a good half or medium tone picture or plate. ‘ If the dot forming needle is insulated from the drum and ' a paper or sheet impregnated with a substance which will change color upon 30 the passage of current instead of using a softened metal to‘ receive the picture then fac simile reproductions can be made in half-tone or any other picture and even a black and white “picture can be reproduced. 35 In accordance with my present invention a point of light is transmitted through a ?lm into a photoelectric cell. The metal in the receiving end is preferably formed by a pulsating dot form er instead of‘ by a machine tool so that it is 40 formed by indenting in contradistinction to cut one or more colors. It further comprehends a novel method and apparatus which eliminates the use of engraving and etching in newspaper reproduction of pic- 25 tures having any type of tone, half-tone or black and white. It further comprehends a novel method and apparatus for facsimile picture transmission. It further comprehends a novel dot former and 30 novel means for actuating it. The invention further comprehends a num ber of novel features‘which will hereinafter be clearly set forth. ’ For the purpose of illustrating the invention, 35 I have shown in the accompanying drawing a typical embodiment of it, which, in practice, will give reliable and satisfactory results. It is, how. ever, to be understood that this embodiment is typical only and that the various instrumentali- 40 ties of which my invention consists can be vari ened. When facsimiles are reproduced, as above set ously arranged and organized, and the invention is not limited to the precise arrangement and forth, synchronization is used between the trans cation. A further object of the invention is to devise a novel machine wherein by increasing its speed a 5 making half-tone pictures in colors. containing ting. The metal plate should be slightly soft 45 mitter and the receiver so that ‘pictures can be sent by-wireless or any other means of communi lighter picture can be received because the dots , (become further spaced from each other. A further object of the invention is to regulate I the depth of the dots by varying the output level of the last ampli?ed stage. 55 A further object of the invention is to control i organization of these instrumentalities as herein set forth. ' ' ~ ' ' 4,5 Figure 1 is an electrical diagram illustrative of a mechanism which can be employed in carry ing out my‘ invention. ' ' Figure 2 is a sectional elevation of a machine which can be employed in carrying out the in- 50 vention, the illustration being partly diagram matic. : Similar numerals of reference indicate corre spondins Darts. Referring ‘to the drawing: 55 ' ‘ 2,112,010 Referring ?rst to the electrical diagram seen in Figure 1, l designates a light source which is movable into a cylinder 2 which carries the ?lm 3 so that the light passing through the ?lm 3 causes a varying direct current in the photoelec tric cell 4. These pulsations of the direct current are ampli?ed by the photoelectric cell ampli?er 5. The output current of this ampli?er 5 causes a varying current to flow in the coil 6 thereby 10 actuating a plunger 1 and causing the frequency of the coil circuit 8 associated with the vacuum tube 9 to vary in period depending upon the in ductive variation of the coil 8. This ?uctuated frequency is ampli?ed by any desirable type of 15 ampli?er i0. The‘output of the ampli?er ill actuates the needle or tool ll of the dot im~ pressor l2. The needle H forms the dots by indenting or marking a metal paper or other receiver l3 carried by a revoluble support 14. Referring now more particularly to Figure 2, I5 is a base having a groove IE to receive a slide I‘! which is moved by means of a shaft I8 of a synchronous motor l9 ?xed to the base IS. The 25 light source I is movable under the ?lm 3 and one or more photoelectric cells 20 are employed carried by a bar 2| connected with the slide I1. This bar is indicated as being separated as at 22 for remote synchronization. 30 23 is a panchromatic ?lter which may be em ployed if desired. The shaft i8 is grooved as at . needle I l'of the dot impressor and the cylinder l4, facsimile work canvbe produced. This invention is'not limited to the shape or form of the transmitting head which may be cylinder as shown, or a flat plate holder, keeping in mind however that the transmitter and the re ceiver must be run in synchronism. The picture received is not limited to metal or paper but may be impinged on any desired mate rial, such as leather, stencil paper or wood or any other devices for picture reproduction. The light can be located either inside the transmitter drum or ?lm holder or exterior of it and the same holds true of the photoelectric cell. By increasing the speed of the rotating ma chine a lighter picture can be produced as the dots become further spaced. The depth to which the dots are formed can be regulated by varying the output level of the last stage of ampli?cation. The number of dots per inch are controlled by varying the frequency of the oscillator. It will be clear that in accordance with this invention one is not limited in any way to the frequency of the oscillator or the frequency for the light or dark portions of the picture. In so far as I am aware I am the ?rst in the art to devise the method herein set forth or to make a plate having a varying dot frequency and printed in any desired'color or colors or to re produce for transmission by wireless or any other 24, for example, the grooves may be about sixty to the inch, to cause the travel of the guide 25 ?xed to the bar 2| on which is also mounted the 35 photoelectric cell 20 and the dot impressor I 2. As before explained the ampli?ed varying cur made, and its is therefore to be understood that I desire my claims to such features to receive the broad and generic interpretation to which a pioneer in the art is entitled. rent from the photoelectric cell 4 goes into the coil 6 and varies the distance the plunger 1 goes It will now be apparent that I have devised a new and useful method of and apparatus for into the primary coil 26 of the oscillator 9; or, the ampli?ed varying current from cell 4 goes into coil 6 and varies the degree of magnetic satura tion of the plunger 1, thus varying the inductance of the ‘coil 26 and varying the frequency of the oscillator 9. This oscillator is a pure electric wave oscillator of sixty to three hundred or more cycles per second preferably. This varying frequency at ‘constant output of the oscillator varies the number of dots per inch impinged on the metal plate or paper mat l3. From this mat a plate 60 for a half-tone printing can be made. If four photo cells are employed each having its oscillating and amplifying circuits as shown in Figure 1, four color plates can be made simul taneously. 55 By placing photoelectric cells around the periphery of the transmitting drum 2 associated with the light i and by employing suitable panchromatic ?lters 23 with each associated photoelectric cell, a plate can be produced simul~ 60 taneously in half-tone for one or more colors. Each cell will have associated with it its cell ampli?er, variable plunger, oscillator, ampli?er, and dot impressor. Thus for each color a half-tone impression in Ga metal or any other material can be produced. After removing each of these impressions from the receiving drum or plate they can be inked with their proper color, and then superimposed 70 one on the other to print a picture in rich half tone colors or any other desired color com bination. If the receiving mat is impregnated with a sub stance which will change color upon the passage of current, and voltage is applied between the 3O means of communication, pictures as herein producing facsimiles and plates for printing pic tures in any desired color, and pictures and plates 40 resulting from such method, which embodies the features of advantage enumerated as desirable in the statement of the invention and the above description and while I have, in the present in stance shown and described a preferred embodi ment thereof which will give in practice satisfac tory and reliable results it is to be understood that this embodiment is susceptible of modi?ca~ tion in various particulars without departing 45 from the spirit or scope of the invention or 50 sacri?cing any of its advantages. Having, thus described my invention What I claim -as new and desire to secure by Letters Patent, is:— 1. Anapparatus for making half-tone printing 55 plates or engravings, comprising means to scan a picture or negative by light, means to translate the picture shadings into electrical pulsations, an oscillator having a resonant circuit actuated by said electrical pulsations to produce a varying 80 frequency, amplifying means for said varying frequency, and an engraving tool actuated by the output from said amplifying means. 2. An apparatus for making printing plates or engravings, comprising means to scan a picture or 65 negative, means to translate the picture shadings into electrical pulsations, a purely electrical os-' cillator actuated by said electrical pulsations to produce a varying frequency, and an engraving tool actuated by said frequency variations. 3. A machine for reproducing a picture on the surface of a plate suit-able for printing, comprising 70 means to scan a picture or a negative, means to translate the shading of the picture into electrical pulsations, an oscillator having a resonant circuit 75 2,112,010 actuated by said electrical pulsations to produce a varying frequency, amplifying means for said varying frequency, an engraving tool actuated by the output from said amplifying means, and means to vary the frequency 'of said oscillator to vary the spacing of the impressions. 4. A machine for making printing ‘plates or engravings comprising means to scan a picture or negative, means to translate the shading of the picture into electrical pulsations, a purely electrical oscillator actuated by said pulsations to produce a varying frequency, an engraving tool actuated by said varying frequency, and means to vary the spacing of the impressions by varying the frequency of the oscillator. 5. In the automatic engraving of a pictorial subject, means for synchronously scanning the subject and engraving a surface, means to trans late the picture shadings into electrical pulsations, an oscillator having a resonant circuit actuated 'by said pulsations to produce a varying frequency, an engraving tool actuated by said varying fre quency, and means to vary the level of said vary ing frequency‘ to vary the depth of the impressions. 6. In the automatic engraving of a printing plate, means for synchronously scanning ‘the pic ture and engraving the plate, means to translate the picture shadings into electrical pulsations, a purely electrical oscillator actuated by said pulsa tions to produce a varying frequency, an engrav ing'tool actuated by said varying frequency, and means to vary the depth of the impressions by 3 produce a varying frequency, an engraving tool actuated by said varying frequency, and means to vary the spacing of the impressions by varying the speed of the transmitting and the receiving surfaces simultaneously. 9. A machine for making half-tone surfaces for printing in color, comprising means for synchro nously scanning the subject photoelectrically and engraving the surface, means for ?ltering the color characteristics of said subject to produce 10 color separations, means including ‘a, resonant circuit for changing the scanning pulsations into frequency variations, and engraving means re sponsive to said frequency variations. 10. An apparatus for the engraving of color 15 separation plates suitable for color printing, com prising means for varying the frequency of a purely electrical oscillator in accordance with the ‘ lights and shades of the subject to be reproduced as modi?ed by each color ?lter, and a separate 20 engraving device actuated by the frequency va riations. 11. An apparatus for automatic color separa tion engraving, comprising means for synchro nously scanning a colored subject and engraving 25 a printing surface successively for each color, means to modify the light and shade character istics of the subject with a color ?lter for each scanning, means including a purely electrical os cillator for changing the modi?ed scanning into 30 frequency variations, and an engraving device re sponsive to said frequency variations. varying the amplitude of said varying frequency. ' 12. An apparatus for automatic color separa T7. In a‘ ‘system of the class described, an oscil tion engraving, comprising means for synchro lator having a resonant circuit whose frequency is varied in accordance with the picture shadings, amplifying means for said varying frequency, an engraving tool actuated by said amplifying means, and means to vary the spacing of the impressions by varying the speed of the transmitter and the receiver simultaneously. 8. An apparatus for producing printing plates or engravings- comprising means for synchro nously scanning‘the picture and engraving the ' printing surface, means to translate the picture ' shadings into electrical pulsations, a purely elec trical oscillator actuated by said pulsations to nously scanning a colored subject and engraving 35 a surface simultaneously for each 'color, means for ?ltering each color simultaneously, means to translate the modi?ed scanning for each color into electrical pulsations, means to amplify the pulsations for each color, means including a reso 40 nant circuit for changing each ampli?ed pulsa tion into, frequency variations, and means re sponsive to said frequency variations to engrave separate surfaces for each color suitable for direct Printing. ' ISAAC BRIMBERG.