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The photographic news
- Bandzählung
- 29.1885
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- 1885
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- Bandzählung
- No. 1385, March 20, 1885
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The photographic news
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Band 29.1885
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- Register Index III
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186 THE PHOTOGRAPHIC NEWS. MARCI 20, 1885. 3185. ALFRED Julius Boult, 323, High Holborn, Middlesex, for “ Improvements in apparatus for applying photographic emulsion to photographic plates.".—[Eli John Palmer, Canada.) •—Complete Specification.—11th March, 1885. 3201. JoshuaBillcliff, 27, Richmond Street, Boundary Lane, Chorlton-on-Medlock, Manchester, Lancashire, for " Improve ments in photographic cameras."—11th March, 1885. Patent Sealed. 14,335. William Griffith Honey, 3, High street, Devizes, Wiltshire, for “ An Improved holder and dark slides to he used therewith for sensitive plates.”.—Dated 30th October, 1881. Patents which have become Void through Non-pay ment of the Seventh Year’s Renewal Pee. 4032. John Henry Johnson, of 47, Lincoln’s Inn Fields, in the County of Middlesex, Gentleman, for “ Improvements in the reproduction of drawings, patterns, devices, or designs.”—A communication from abroad by La Socit Henri Pellet et Campagnie, of Paris, in the Republic of France.—Dated 27th May, 1878. The well-known Pellet process of printing in blue lines on a white ground. Specification Published during the Week. 6743. Norman Macbeth, of the Victoria Foundry, Bolton, in the County of Lancaster, Engineer, for “ Improvements in the production of printing surfaces by the aid of photo reliefs.” Dated 22nd January, 1885.—Complete Specification.* At this stage in the process 1 usually remove the filling sub stance, but if preferred for any reason, it may be removed after the grinding or reducing operation next to be described. The so far prepared surface of the block or plate is now to be ground, scraped, planed, or reduced until the higher prominences are reduced in height or are reduced to one level plane, whereby the ridges, grains, or projections are made wider, and the intervening grooves or spaces narrower, to a greater or less extent, according to the degree of depression caused by the varying relief of the photo film. This reducing of the surface may be conveniently effected by grinding with emery or other abrading powder upon a flat metal surface, or by grinding upon a plane surface, or by means of a revolving grinder traversed in a straight line, or a planing machine, or tool, or a straight scraper, or any other suitable means may be employed. The filling substance is now removed, if this has not been done previously, and the block or plate may be used in the obtainment of printed impressions. If pre ferred the block or plate may receive a thin protective coating of a harder metal, such as nickel, cobalt, or copper. In place of grinding, scraping, or planing the block or plate, I may subject it to pressure to obtain a corresponding effect, the filling sub stance being removed previously to such pressing operation, or I may obtain the desired effect by the employment of both methods. The block or plate may be pressed in contact with a smooth, hard, plane surface, the pressure being so regulated as to crush or flatten down the higher prominences to the extent required to obtain the desired effect. I do not, however, con sider this method so suitable as the grinding or scraping, as the effect of the operation cannot be so well controlled. If it be desired to obtain a printing-block or plate, having deeper depressions in the high lights than would be produced by the direct pressure of the relief film, in the manner herein before set forth, I ink the block or plate, which has been im pressed by a negative photo relief film, using an acid or solvent resisting ink, and I transfer an impression in such ink from the said block or plate to a plate of zinc, copper, or suitable metal, which may afterwards be suitably etched or treated with acid or solvent, so as to produce a printing surface. In place of obtaining the impression directly from the prepared block or plate, I may take an impression upon transfer or medium, and transfer the ink therefrom to the metal-plate, which is to be etched. I may obtain this impression in the flattening opera tion, in which case I may press the zinc, copper, or other metal plate, or a sheet of transfer paper or medium, upon the inked block or plate, so as to flatten the prominences in the manner hereinbefore mentioned, the plate so used in the flattening pro cess retaining an impression in ink of the subject, and after being “ bitten ’’ in or treated with acid, maybe used in printing operations, or in case transfer paper or medium has been used, the received impression in ink may be transferred to a metal plate, which may have the picture “bitten in.” The • Continued from page 171. blocks or plates produced by the foregoing processes may be printed from direct, or electro-type copies may be obtained and be used for printing purposes, especially in cases wherein a large number of printing impressions is required. I may vary the process by obtaining a cast or mould of the film in a suitably hard material, and using this instead of the film to impress the prepared surface of the softer block or plate, which is in all other respects treated in the manner hereinbefore set forth, or the relief film may be applied with pressure directly to the said prepared surface in the manner hereinbefore set forth, whereby the block or plate receives an impression, but in place of reduc ing, grinding, or flattening the surface of the said block or plate, a cast or impression is obtained from it by electro deposit, or by pressure or other suitable means, and this may then be ground or reduced in the manner hereinbefore set forth, to render it suitable for printing from. By these means several impressions of one subject may be obtained from the one block or plate containing the original impression. I do not confine myself to the plane formation of printing surfaces, as in some cases such surfaces may be of cylindrical formation, as, for example, when required for application to the cylinder of a printing machine, or to be used in the printing of woven fabrics, nor do I confine myself to the use of the filling material in all oases. In some cases, as, for example, when electro-type shells or thin plates, backed up with a softer metal, are used, as hereinbefore men tioned, the metal, say for example copper composing such shells, may have sufficient stiffness to of itself maintain the sectional forms of the ridges or projections to a suitable degree, without the support of a filling powder or substance. Having now particularly described and ascertained the nature of my said invention, and in what manner the same is to be performed, I declare that what I claim is— 1. Scoring, lining, graining, stippling, or preparing in the indicated manner a block or plate of suitable impressible material, pressing thereupon a photo relief film, and subsequently grind ing, scraping, reducing or flattening the prepared and impressed surface substantially as and for the purpose set forth. 2. In the process comprised in the first claim, filling the lines or depressions in the prepared block with a powder or substance, for the purpose herein set forth. 3. Obtaining an electro-type shell or film from a surface which is scored, lined, grained, stippled, or otherwise suitably adapted for my purpose, backing up such shell with a softer impressible metal, alloy, or substance, and using the block so produced in the process included in the first claim herein. 4. Pressing a photo-relief film upon a block or plate, having a suitably lined, grained, stippled, or prepared surface, as afore said, obtaining an electro-type or other impression from the said surface so impressed, and treating the surface of the said im pression by grinding, scraping, planing, or other reducing or flattening operation, substantially as and for the purpose set forth. 5. Preparing a block or plate, by pressing a photo-relief film upon a surface of a nature hereinbefore indicated, and by subse quently grinding, reducing, or flattening the prominences ; ink ing the printing surface so obtained with an acid resisting ink, obtaining an impression of or transfer from the inked surface upon a zinc, copper, or metal plate, and subsequently etching or “ biting in ” the last named plate substantially as and for the purpose set forth. 6. Preparing a lined, grained, or roughened block or plate, and filling the depressions in the surface thereof, as hereinbefore set forth ; pressing a photo-relief film upon the surface so prepared, removing the filling, inking the impressed surface, pressing a copper, zinc, or metal plate upon the inked surface, so as to flatten the prominences, and subsequently etching or “ biting in” the metal plate, which has received an impression in ink from the said block or plate, substantially as and for the purpose set forth. 7. As a variation of the process indicated in the sixth claim hereof, pressing transfer paper or medium upon the inked block or plate, so as to flatten the prominences, transferring the inked impressions so obtained to a metal plate ; and etching or biting in the said plate, in order to obtain a printing surface or plate. 6898. Henry Joseph Redding, 48, Myddelton Square, London, E.C., Optician and Photographer, for " An improved pockect ruby lantern for photographic purposes.”—Dated 27th Jan., 1885. [Complete Specification}. A folding triangular lamp, of which the body is hinged on one of the sides, so that it can be without a break or separation at | any one of the angles. The specific claim is as follows-
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