DE830652C - Method and device for the production of screened offset printing plates while the image is being drawn - Google Patents
Method and device for the production of screened offset printing plates while the image is being drawnInfo
- Publication number
- DE830652C DE830652C DE1950M0002599 DEM0002599A DE830652C DE 830652 C DE830652 C DE 830652C DE 1950M0002599 DE1950M0002599 DE 1950M0002599 DE M0002599 A DEM0002599 A DE M0002599A DE 830652 C DE830652 C DE 830652C
- Authority
- DE
- Germany
- Prior art keywords
- paper
- drawn
- image
- printing plates
- screened
- 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
Links
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
- B41C1/10—Forme preparation for lithographic printing; Master sheets for transferring a lithographic image to the forme
- B41C1/1091—Forme preparation for lithographic printing; Master sheets for transferring a lithographic image to the forme by physical transfer from a donor sheet having an uniform coating of lithographic material using thermal means as provided by a thermal head or a laser; by mechanical pressure, e.g. from a typewriter by electrical recording ribbon therefor
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Optics & Photonics (AREA)
- Manufacturing & Machinery (AREA)
- Manufacture Or Reproduction Of Printing Formes (AREA)
Description
Zur Herstellung gerasterter wurde bisher zuerst der Bildentwurf hergestellt, dann das Bild auf fotochemischem Weg gerastert und schließlich auf :die Druckplatte übertragen.For the production of rastered images, the first picture was previously produced, then the image is rasterized in a photochemical way and finally onto: the printing plate transfer.
Nach dem erfindungsgemäßen Verfahren «erden diese drei Arbeitsgänge zusammengefaßt und die neue Arbeitsweise auch für Mehrfarbendrucke angewandt. Dabei wind folgendermaßen verfahren: Ein Bild wird mit Kreidestiften usw). entsprechend den Grundfarben auf ,geeignetes Papier gezeichnet. Es wird jeweils immer nur eine Farbe des Bildes, z. B. zuerst gell, gänzlich aufgetragen. Vorher legt man unter das Papier eine Druckplatte, dann Kohlepapier und ein geeignetes ;Gewebe, so daß durch die Gewebestruktur die auf das Papier aufgetragenen .gelben Farbflächen je nachdem mit dem Stift angewenideten Druck auf der ,Druckplatte als gerasterte Flächen mit mehr oder weniger dicken Punkten erscheinen. Dann wird auf das Papier die zweite Farbe des Bildes, z. B. rot, aufgetragen, wobei vorher eine andere Platte mit Kohlepapier und gleichem Gewebe untergelegt wird, die dann nur die roten Farbflächen in gerasterter Ausführung erhält. Genau so .wird mit Iden anderen Farben verfahren. Druckt man dann die so hergestellten Platten mit Druckfarben, die den angewendeten Farbstiften entsprechen, übereinander, so zeigt der Druck die gleiche Ausführung wie der mit Farbstiften auf das Papier ausgeführte Entwurf.According to the method according to the invention, these three operations are grounded summarized and the new way of working also applied to multicolor prints. Included wind proceed as follows: A picture is drawn with chalk pencils, etc.). corresponding the basic colors, drawn on suitable paper. There will be only one at a time Color of the picture, e.g. B. first gell, applied completely. Before you put under the paper a printing plate, then carbon paper and a suitable fabric so that the yellow colored areas applied to the paper due to the fabric structure after applying pressure with the pen on the pressure plate as rasterized areas appear with more or less thick points. Then the second is on the paper Color of the picture, e.g. B. red, applied, previously another plate with carbon paper and the same fabric is placed underneath, which then only the red colored areas in rasterized Execution receives. The same is done with the other colors. One prints then the plates produced in this way with printing inks that match the colored pencils used correspond, one on top of the other, the print shows the same design as the one with Color pencils on the paper executed design.
Dies setzt jedoch voraus, daß die Druckplatten genau aufeinander passen. Dies wird dadurch erreicht, daß ,der Zeichentisch a der Zeichnung durch einen Rahmen b umschlossen ist. Der Rahmen trägt das Zeichenpapier c, das in bekannter Weise, beispielsweise durch. Reißnägel, befestigt werden kann. Der Rahmen b ist durch Scharniere d o. .g1. schwenkbar am Tisch befestigt, damit die Druckplatte e, das-Kohlepapier f und das Gewebe g unter das auf den Rahmen gespannte Papier gelegt werden können. Der Zeichentisch besitzt Paßstifte h; in diese werden die entsprechend gelochten Druckplatten eingehängt. Die Lochung der Platten wird dann in der Druckmaschine in genaue Deckung zu entsprechenden Paßstellen gebracht, so daß beim Drucken die einzelnen Farben genau aufeinanderkommen und ein besonderes Einrichten nicht notwendig ist.However, this assumes that the printing plates fit exactly on one another. This is achieved in that the drawing table a of the drawing is enclosed by a frame b. The frame carries the drawing paper c, which in a known manner, for example by. Tacks, can be attached. The frame b is by hinges d o. .G1. pivotally attached to the table so that the printing plate e, carbon paper f and fabric g can be placed under the paper stretched on the frame. The drawing table has dowel pins h; The corresponding perforated pressure plates are hung in these. The perforation of the plates is then brought into exact congruence in the printing machine with the corresponding registration points, so that the individual colors come together exactly when printing and a special set-up is not necessary.
Claims (2)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE1950M0002599 DE830652C (en) | 1950-03-30 | 1950-03-30 | Method and device for the production of screened offset printing plates while the image is being drawn |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE1950M0002599 DE830652C (en) | 1950-03-30 | 1950-03-30 | Method and device for the production of screened offset printing plates while the image is being drawn |
Publications (1)
Publication Number | Publication Date |
---|---|
DE830652C true DE830652C (en) | 1952-02-07 |
Family
ID=7291773
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE1950M0002599 Expired DE830652C (en) | 1950-03-30 | 1950-03-30 | Method and device for the production of screened offset printing plates while the image is being drawn |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE830652C (en) |
-
1950
- 1950-03-30 DE DE1950M0002599 patent/DE830652C/en not_active Expired
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