US1888303A - Method of producing intaglio printing forms - Google Patents

Method of producing intaglio printing forms Download PDF

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Publication number
US1888303A
US1888303A US417603A US41760329A US1888303A US 1888303 A US1888303 A US 1888303A US 417603 A US417603 A US 417603A US 41760329 A US41760329 A US 41760329A US 1888303 A US1888303 A US 1888303A
Authority
US
United States
Prior art keywords
endless
cylinder
film
resist
pattern
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
US417603A
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English (en)
Inventor
Wolfsohn Kurt
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.)
ROTOPHOT AG fur GRAPHISCHE IN
ROTOPHOT AG fur GRAPHISCHE INDUSTRIE
Original Assignee
ROTOPHOT AG fur GRAPHISCHE IN
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 ROTOPHOT AG fur GRAPHISCHE IN filed Critical ROTOPHOT AG fur GRAPHISCHE IN
Application granted granted Critical
Publication of US1888303A publication Critical patent/US1888303A/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
    • B41C1/00—Forme preparation
    • B41C1/18—Curved printing formes or printing cylinders
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03F—PHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES, e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTOR DEVICES; MATERIALS THEREFOR; ORIGINALS THEREFOR; APPARATUS SPECIALLY ADAPTED THEREFOR
    • G03F7/00—Photomechanical, e.g. photolithographic, production of textured or patterned surfaces, e.g. printing surfaces; Materials therefor, e.g. comprising photoresists; Apparatus specially adapted therefor
    • G03F7/16—Coating processes; Apparatus therefor
    • G03F7/18—Coating curved surfaces

Definitions

  • the present invention relates to a process for the manufacture of endless intaglio printing formes or plates for printing paper, textile materials, oil-cloth, linoleum and similar materials.
  • Endless intaglio formes or plates for printing paper and similar materials are already known.
  • the pattern to be reproduced has heretofore been copied on a light-sensitive, preferably screened pig- 1o 'ment gelatine paper, such as carbon tissue backed with paper and the copy was then transferred to the metal support and developed. Since the transference was not possible without a so-called securing edge, the pattern' could not be applied to theperiphery of the endless intaglio forme without a break.
  • the process was particularly difiicult to carry out in the case of patterns exhibiting a long range of shades covering the entire surface of the intaglio forme and having a uniformly bright tone which forms as it were the ground work of the pattern to which the remaining elements of the pattern are applied. Even if the successively etched portions were subjected to a subsequent etching process which was difiicult to carry out, complete uniformity in the portions of the etchings was hardly ever obtained, so that in most cases several etchings had to be rejected, before two etchings which matched after a fashion were obtained.
  • the novel feature of the present invention consists in com- 50 bining the parts of the etching ground or resist on the endless forme or cylinder before either part is etched and then carrying out the etching in a single operation.
  • the securing edge of each part of the resist covermg is removed, for example by cutting it off, before the application of any further ad- ]oining part of the resist covering and the securing edge of the last part which comgletes the resist covering is also removed.
  • the pertaining parts of the resist covering are preferably covered by a medium, for example varnish, which protects their surface.
  • a medium for example varnish
  • the protecting medium is removed from the endless resist covering, for example by the use of a solvent for the varnish, and the etching of the endless resist which has been prepared in this manner is carried out in a single operation.
  • Fig. 1 shows a printing cylinder having one-half of a film applied thereto
  • Fig. 2 is a top plan view of Fig. 1;
  • Fig. 3 shows a cylinder on which the first half of the film has beencut and trimmed, and the second half of the film positioned upon the other half of the cylinder;
  • Fig. 4 illustrates in plan the cylinder shown in Fig. 3;
  • Fig. 5 is a view showing the cylinder with the two halves of the film in proper position thelreon and ready for the etching treatment;
  • Fig. 6 shows a plan view of the finished cylinder shown. in Fig. 5.
  • the numeral 1 indicates a copper c linder which is to be provided with an end ess intaglio pattern for the printing of paper, textiles, oilcloth, linoleum, and similar materials.
  • the cylinder 1 is provided with a continuous endless pattern free of breaks or irregularities in the following manner. A 100 selected portion of the pattern, two securing edges 5 and 6.
  • the part 2 of the film which,
  • Figs. 2, 4 and 6 which illustrate plan views of the cyl-- inder at the various stages of the process, only the lines 3-3 being visible, the lines 4-4 being at thezunderside of the cylinder as shown in Figs. 1, 3 and 5.
  • Figs. 1 and 2 show the steps of the process in which the part 2 of the film is covered with the protecting varnish 7.
  • the securing edges 5 and 6 of the developed, protected film are either lightly cut off with a sharp knife without injuring the cylinder, and the superfluous film pulled off dry, or they are moistened and then pulled off. It is of advantage to coat the varnish layer 7 with a solution of a colloid (chromate-albumin, gelatine, dextrin), to which metallic salts, such as aluminum sulfate, may be added, in order to secure a better adhesion of the second transfer.
  • a colloid chromate-albumin, gelatine, dextrin
  • metallic salts such as aluminum sulfate
  • the film section containing the rest of the pattern is now positioned upon the cylinder 1.
  • This second film is composed of a portion 8 which contains the remainder of the pattern, and the two securing edges 9 and 10.
  • the portion 8 of the second'film is bounded by the curved or irregular lines 3-3 and 4-4, like the portion 2 containing the other section of the pattern, it is only necessary so to position the film 8, 9, 10 upon the cylinder that the lines 3-3 and 4-4 of the parts 2 and 8 coincide in order properly to join up the two parts of the pattern.
  • the second part of the pattern is now developed and after drying is covered with a coat of varnish 11. This phase of the process is illustrated in Figs. 3 and 4.
  • any dilferences in the height of the relief can at once be equalized by the employment of suitable etching solutions, since the progress of the etching on the periphery of the printing cylinder which has been prepared in accordance with the invention can be controlled continuously.
  • the result of the process is an endless intaglio printing forum or plate which is quite uniform in the gradations of tone, such as could not be obtained by the hitherto usual method of successive partial etchings.
  • I claim 1 Process for the manufacture of circular intaglio printing forms which comprises transferring parts of a picture or pattern to a light-sensitive screened, pigment film, applying the pigment film to the surface of the printing cylinder, developing it, coating it with a medium which protects its surface, removing its securing edge, combining this portion of the resist covering similarly with further portions which fit on to and adjoin the adjacent portion so as to form an endless resist, removing the protecting medium from the endless resist and then etching in a single process of operation.
  • the steps which comprise applying to the form in succession a plurality of resist covering sections each provided with a securing edge, removing the securing edge of each part before the application of the next adjoining section of the covering, then removing the securing edge of the last section applied and thereby completing the endless resist covering, and then etching the cylinder in a single treatment.
  • the steps which comprise applying to the form in succession a plurality of resist covering sections each provided with a securing edge, coating each part of the resist covering with a medium which protects its surface and removing its securing edge before the application of the next adjoining section of the resist covering, removing the securing edge of the last portion applied and thereby completing the endless resist covering, removing .the protecting medium, and then etching the cylinder in a single treatment.
  • the steps which comprise applying to the form in succession a plurality of resist covering sections each provided with a securing edge. coating each section of the resist covering with a medium which protects its surface and removing its securing edge before the application of the next adjoining section of the resist covering, coating the last section of the resist covering with such protecting medium and removing its securing edge, removing the protect- 7 ing medium and then etching the cylinder in a single operation.

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Printing Plates And Materials Therefor (AREA)
  • Photosensitive Polymer And Photoresist Processing (AREA)
  • Printing Methods (AREA)
US417603A 1929-06-21 1929-12-30 Method of producing intaglio printing forms Expired - Lifetime US1888303A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE1888303X 1929-06-21

Publications (1)

Publication Number Publication Date
US1888303A true US1888303A (en) 1932-11-22

Family

ID=7747697

Family Applications (1)

Application Number Title Priority Date Filing Date
US417603A Expired - Lifetime US1888303A (en) 1929-06-21 1929-12-30 Method of producing intaglio printing forms

Country Status (5)

Country Link
US (1) US1888303A (en, 2012)
BE (1) BE371050A (en, 2012)
FR (1) FR697332A (en, 2012)
GB (1) GB355872A (en, 2012)
NL (1) NL30485C (en, 2012)

Also Published As

Publication number Publication date
BE371050A (en, 2012)
GB355872A (en, 2012) 1931-09-03
FR697332A (fr) 1931-01-15
NL30485C (en, 2012) 1933-03-15

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