US1857842A - Method of producing printing plates - Google Patents

Method of producing printing plates Download PDF

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Publication number
US1857842A
US1857842A US356546A US35654629A US1857842A US 1857842 A US1857842 A US 1857842A US 356546 A US356546 A US 356546A US 35654629 A US35654629 A US 35654629A US 1857842 A US1857842 A US 1857842A
Authority
US
United States
Prior art keywords
lead
printing
copper
photograph
molds
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US356546A
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English (en)
Inventor
Frederick C Goldenbaum
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
HERBERT PHOTOS Inc
Original Assignee
HERBERT PHOTOS Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by HERBERT PHOTOS Inc filed Critical HERBERT PHOTOS Inc
Priority to US356546A priority Critical patent/US1857842A/en
Priority to FR682802D priority patent/FR682802A/fr
Priority to GB32343/29A priority patent/GB347657A/en
Application granted granted Critical
Publication of US1857842A publication Critical patent/US1857842A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41C—PROCESSES FOR THE MANUFACTURE OR REPRODUCTION OF PRINTING SURFACES
    • B41C3/00—Reproduction or duplicating of printing formes
    • B41C3/06—Reproduction or duplicating of printing formes to produce printing blocks from plastics

Definitions

  • Another object of the invention is to provide a multiplicity of said flexible printing plates from a single original copper engraving or zinc etching so as to reduce the cost of news photographs, advertising material, etc., and facilitate the reproduction thereof by the printer.
  • Another object of the invention is to provide a method of producing flexible printing plates capable of printing half-tone photo graphs etc. on which the photograph or ad-4 vertising material is provided and which is at the saine time provided with integral clear type caption and descriptive printing relating to said photograph or advertising material.
  • Another object of the invention is to provide an ap aratus and method whereby said flexible printing plates are provided in the process of manufacture with integral turned flanges to facilitate the securing of the saine upon the printing block.
  • Another object of the invention is to provide a method of producing flexible printing plates of the type described in whichthe lines in the copper engravin orzinc etching may be reproduced in a lea ⁇ niold positive under pressure without producing variations in thickness and imperfections in the'leadmold.
  • Another object of the invention xistoprovide the publishers and printers in outlying cities with flexible non-metallic plates for printing photographs and the like at a lower cost than ,they can secure electrotypes for this purpose. f i
  • Fi ure 6 is an enlarged sectional view showing the production of a printing plate from the lead mold
  • Figure 7 is a plan view of the multiple printing material used in proframe used in the production of printing plates from the lead molds;
  • Figure 8- is a sectional view on the line 8-8 of Figure 7 showing the lead mold,'printing plate and pressure block in position in the frame;
  • Figure 9 is a sectional view of the lower portion of the frame with part of the upper section removed.
  • I Aam by my invention, enabled to supply ⁇ to newspapers in outlying districts a news photograph or advertising service providing them with printing plates of thin flexible material carrying the half-tone imprint of the photograph pr the like and adapted to be and take the imprint ofrall the fine lilies and printlng plates which can be .mailed to the various subscribing newspapers in the news photograph service at ay cost only slightly greater than the cost of supplying the photograph itself and much lower than the cost of mailing electrotype or stereotype platesor copper engravings.
  • a photograph 10 of any suitable subject matter is first prepared by the photographer o r artist.
  • a copper engraving or zinc plate 11 is then prepared from this photograph carrying, in addition to thephotographic subject matter, al
  • suit-able descriptive caption or descriptive printing 11a to describe the subject'matter of the photograph, the said descriptive printing 11a being reproduced on a clear backthis mold.
  • the copper engraving or zinc plate produced in thisivay is then used as the patrix for the production of a plurality of lead moldmatrixes 12 carrying an imprint of the photograph 12a and an imprint of the type or caption material 12b.
  • Any number of lead molds 12 can be produced from the original copper engraving or zinc plate 11 by placing a sheet of lead of a suitable thickness, say .O inches.
  • the copper engraving or zinc plate 11 shown with the lead 12 in position thereon in Figure 5 is provided along thc outer margins of matter to be produced with ridges 11b and depressions 11e around the margin thereof acting as dams into which the lead of the of the press squeezed out sideways along the edges of the copper enthe photographer other graving or zinc plate which would cause the lead plate to be thinner at the edges than at the center, producing an imperfect printing surface.
  • the lead molds 12 are assembled in the frame 14 and the edges of the frame 15 and 15a voverlap the edges 12e of the mold to retain the molds in position in the frame, and for the production of the printing plate, a sheet of suitable plastic, moldable material 16, such as fiberloid. (produced from a mixture of papel', camphor and alcohol), celluloid. or the like, is placed upon the frame over the lead molds 12 and vafter being heated to a softening temperature of from 225 to 250 F.,
  • thesheet 16 is covered by a resilient pressure member of felt or the like 17 and placed under av platen of a hydraulic or other press where a pressure of 25 to 100 pounds (varying with the high lights of the photograph and the thickness of the sheet 16) is placed upon thesheet 16 to cause it to take the impression of the lead molds 12.
  • the sheet 16 is preferably of slightly greater Width than the width of the opening in the frame 15 so that when the pressure member 17, which is of slightly smaller size than the opening in the frame 15, is pushed into this opening, los right angle flanges 16a are turned up along two edges ofthe sheet 16 to provide a final printing plate 18 having integral'flanges 18a by which it may be secured on a printing block and carrying on its face a negative halftone photograph 18?).
  • the printing or caption material 180 reproduced on a clear background. and the marginal raised and depressed border flanges 18d caused by the lead flowing into the ridges and depressions 11b 115 and 110 to provide a suitable margin or border for the picture.
  • the lead molds 12 after having been pressed into the face fof the copper engraving or zinc plate. to a planing operation to smooth the back thereof and assure uniform thickness throughout. so as to prevent any lack of uniformity in the final printing' plate which would cause improper printing when inserted in the presses.
  • the de- ,125 pressions 14?) in the frame'14 are of subst-antially the exact dimensions of the lead molds and correspond in depth to the thickness of the lead. so that the molds 12 are confined olf all edges by the depressions 14b and the over- 130 hangiiig of the frame 1'5, so that the pressure of the member 17 will not cause 'any ilow of the lead in the molds 12 when under the molding press. y y
  • the frame 14, used in producing the printing plates from the lead molds is provided with a bordering frame member with separate division strips l15a and lthe face of the frame 14 is provided with depressions 14?) approximately the thickness of the lead molds and of a size to receive lead molds cari'vin1r the ortion o the icture to be rethe face of the lead molds and, so as to confine the lead of the molds 12 from spreading y ⁇ under the pressure of the molding press.
  • ⁇ -strips 15a in molding press is preferably water-cooled to quickly lower the temperature of the sheet 16 and the temperature of the molds and sheet is reduced to about 100 toI150 F. under the.
  • theouter frame 15 may be ⁇ removed from the frame 14, leaving the longitudinaldivision position therein, so as to permit the lead molds 12 to be inserted under the edge of thestrips 15a or the molds to be removed therefrom. the strips 15a serving temporarily to hold the lead molds in place while the-frame 15 is inserted thereover,
  • What l claim as my invention is: 1. The method of prepari nga flexible nonmetallic photographic printing plate which comprises producing a half-tone copper engraving patirixl from a photograph, providing the copper engraving with a clear line printing caption outside the half-tone portion. preparing a' lead mold 'matrix -from the copper engraving carrying the halfftone photograph and clear' 'line printing material, molding the vflexible non-metallic printing plate from the lead mold by heat and pres-- sure and formingiutegral turned flanges on the printing plate during the molding process. ,I i
  • the ⁇ method of preparing a flexible nonmetallic photo raphic printing plate which comprises pro ucing a half-tone copper engraving from a photograph, ,providing the copper engraving patrix with a clear line printing caption and description outside the half-tone portion and with ridges and depressions on the outer edges, preparing a lead mold matrix from said copper.
  • the method of preparing a. flexible nonmetallic4 photographic printing plate which comprises producing a half-tone copper ein graving patrix froma photograph, provid- Anog the copper engraving with a clear line printing caption and description outside the half-tone portion aiid with ridges and depressions on the outer edges, preparing a lead mold matrix from said copper engraving by pressing the lead into the copper engraving and utilizing the ridges/and depressions onf v the edges of the copper engraving to prevent side-wise flow of the lead under pressure and molding the flexible non-metallic printing plate from the lead mold by'heat and pressure and confining the edges of the lead mold .from spreading during the printing plate molding operation utilizing the ridges and depressions of the copper engraving as a border for the photograph.
  • the method of preparing flanged nonmetallic photographic printing plates which comprises preparing al copper engravin patrix from the photograph, providing sai patrix with a clear line caption and descriptive printing outside the halfstone portion, preparing lead mold inatrixes from said copion - trlx and frame and the plate: material, and

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Manufacture Or Reproduction Of Printing Formes (AREA)
  • Printing Plates And Materials Therefor (AREA)
US356546A 1929-04-19 1929-04-19 Method of producing printing plates Expired - Lifetime US1857842A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
US356546A US1857842A (en) 1929-04-19 1929-04-19 Method of producing printing plates
FR682802D FR682802A (fr) 1929-04-19 1929-10-05 Procédé et appareil pour produire des planches d'impression
GB32343/29A GB347657A (en) 1929-04-19 1929-10-24 Method and apparatus for producing printing plates

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US356546A US1857842A (en) 1929-04-19 1929-04-19 Method of producing printing plates

Publications (1)

Publication Number Publication Date
US1857842A true US1857842A (en) 1932-05-10

Family

ID=23401895

Family Applications (1)

Application Number Title Priority Date Filing Date
US356546A Expired - Lifetime US1857842A (en) 1929-04-19 1929-04-19 Method of producing printing plates

Country Status (3)

Country Link
US (1) US1857842A (fr)
FR (1) FR682802A (fr)
GB (1) GB347657A (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2517701A (en) * 1947-05-03 1950-08-08 Electrographic Corp Plate curving process
US3221654A (en) * 1960-09-22 1965-12-07 Dynamics Corp America Plastic printing plate and method for manufacture
US5127321A (en) * 1990-05-22 1992-07-07 Silk Screen Technologies, Inc. Method and apparatus for pre-registration of multiple printing screens in a screen printing operation

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2517701A (en) * 1947-05-03 1950-08-08 Electrographic Corp Plate curving process
US3221654A (en) * 1960-09-22 1965-12-07 Dynamics Corp America Plastic printing plate and method for manufacture
US5127321A (en) * 1990-05-22 1992-07-07 Silk Screen Technologies, Inc. Method and apparatus for pre-registration of multiple printing screens in a screen printing operation

Also Published As

Publication number Publication date
GB347657A (en) 1931-04-29
FR682802A (fr) 1930-06-03

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