US2214950A - Planographic printing plate - Google Patents
Planographic printing plate Download PDFInfo
- Publication number
- US2214950A US2214950A US147140A US14714037A US2214950A US 2214950 A US2214950 A US 2214950A US 147140 A US147140 A US 147140A US 14714037 A US14714037 A US 14714037A US 2214950 A US2214950 A US 2214950A
- Authority
- US
- United States
- Prior art keywords
- ink
- printing
- plate
- areas
- chromium
- 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
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41N—PRINTING PLATES OR FOILS; MATERIALS FOR SURFACES USED IN PRINTING MACHINES FOR PRINTING, INKING, DAMPING, OR THE LIKE; PREPARING SUCH SURFACES FOR USE AND CONSERVING THEM
- B41N1/00—Printing plates or foils; Materials therefor
- B41N1/04—Printing plates or foils; Materials therefor metallic
- B41N1/08—Printing plates or foils; Materials therefor metallic for lithographic printing
- B41N1/10—Printing plates or foils; Materials therefor metallic for lithographic printing multiple
Definitions
- the invention relates to a planographic printing plate, more particularly a printing plate for offset printing, and a method of producing such a printing plate.
- Planographic printing plates are produced, generally, by etching a stone plate or a zinc or aluminium plate. Printing by means of these plates is based in principle on the different cam pability of the etched and the non-etched areas ink in a moist condition.
- the said printing plates are not so hard and so resistant against wear as it is desirable particularly for the purpose of producing greater issues.
- the surface of the said plates must be provided with a grain previous to transferring the picture to the plate and etching the same, which limits naturally the fineness of the details in picture which can be transferred thereto, and in particular the fineness of the points of an autotype to be printed therewith.
- the said plates must be coated with 8 11 arabic or some other protecting agent in order to prevent the chemical or physical differences between the ink-receiv- 35 ing and ink-refusing areas of the picture being destroyed by the oxidising influence of the atmospheric air.
- the abovenamed drawbacks of known methods are avoided by employing a printing plate in the manner known from printing with stone, aluminium and zinc, the water-retaining areas refusing the printer's ink in moist condition consisting of stainless steel, chromium, chromium alloys, metals related to chromium and possessing the same capability of refusing ink in moist condition' or alloyed steels containing such metals and having the said property.
- the present invention comprises also the printing method in which a printing plate, the ink-refusingareas consist of stainless steel, chromium etc. is used, and in which the plate is moistened during the printing process, and printing is carried out in the same manner as printing by stone plates or aluminium or zinc plates.
- the ink-receiving areas of the printing plate consist of metal capable of refusing water and retaining ink, when the printing method is carried out in the manner known from the stone printing method or from aluminotype or zincotype.
- metals are well known to printers.
- Such metals may be mentioned copper, nickel and the like.
- the ink-receiving areas consist of areas of the metals in question applied in a very thin layer to a supporting surface consisting of the ink-refusing material.
- the areas of ink-receiving material are preferably formedby the areas remaining on the support, when a thin coating of the ink-retaining metal on the same is locally etched through, so as to reveal the underlying surface of the supporting inkrefusing material.
- the employment of the printing plate of the preferred form above described is advantageous on several points.
- the surface of the stainless steel or chromium forms a firm and hard support of the printing points, which causes the plate to be very durable.
- the durability of the printing plate may be further improved.
- printing with the new printing plate may be discontinued without necessity for coating the picture, the ink-refusing areas of the plate remaining unaltered, even if they are exposed to atmospheric air for ever so long, and, as it is Q well known, it is not dimcult choosing an inkreceiving material that is not altered in an undesirable way by exposure to air.
- the plate of material having ink-refusing properties is made in condition for re-use simply by removing the ink-receiving metal by etching.
- the ink-refusing supporting surface may be brightly polished which permits the points, lines and areas of the picture to be as sharply limited as desired.
- the ink-refusing supporting surface is resistant against scratching during preparation of it and during erecting in the printing machine. Further the stainless steel or similar material possesses the greatest possible strength in the shape of plates, cylinders or the like.
- the printmg plate consists of a plate of stainless steel or chromium which plate is plain or cylindrical or has the shape of a sector of a cylinder or any other shape suitable for graphical purposes.
- the plate is thick and self-supporting or thin like sheet metal in which case it is arranged during employment on a suitable support.
- the plate does not consist of stainless'steel or chromium but of a supporting plate or cylinder sector to which a thin plating of chromium or similar metal having the capability of refusing ink when used in a moist state is applied.
- the supporting plate or cylinder in this case may consist'of common steel.
- a thin layer of copper or another ink-receiving metal is applied in the localities corresponding the points or lines or areas of the picture.
- This layer is preferably applied galvanically.
- the copper is applied galvanically by means of a bath the pH of which is at a very low value for instance 1.5 to 2.5 or still lower.
- nickel is applied to the chromium-containing support in place of copper, the pH of the bath being at the low value mentioned above.
- Nickel is capable of receiving ink when moist but the capability of copper for this purpose is still better. Accordingly it is preferred to apply a layer of copper on the surface of the layer of nickel, the latter being in this case extremely thin.
- the surface of the plate is preferably completely covered by a thin layer of the said metal ormetals after which this layer is locally etched away at the. localities where the printing plate shall yield no print so that the stainless steel or chromium is exposed at these localities.
- a planographic printing plate comprising areas of a metal capable of receiving printers ink and areas of an ungrained metal capable of refusing ink, said areas consisting of different metals, the ink refusing areas consisting of a substance selected from the group consisting of stainless steel, chromium, and chromium alloys.
- a planographic printing plate the surface of which comprises areas of chromium in an ungrained state and areas of an ink receptive metal selected from the group consisting of copper and nickel.
- a planographic printing plate the surface of which comprises areas of water receptive steel not sensitive to fatty drawings or transfer impressions in an ungrained state and areas .of an ink receptivemetal selected from the group consisting of copper and nickel.
- a planographic printing plate comprising an unbroken layer of stainless steel not sensitive to fatty drawings or transfer impressions having an ungrained surface, parts of which are covered by areas of copper.
Landscapes
- Printing Plates And Materials Therefor (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEA79973D DE767607C (de) | 1936-07-11 | 1936-07-11 | Flachdruckplatte |
Publications (1)
Publication Number | Publication Date |
---|---|
US2214950A true US2214950A (en) | 1940-09-17 |
Family
ID=6542955
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US147140A Expired - Lifetime US2214950A (en) | 1936-07-11 | 1937-06-08 | Planographic printing plate |
Country Status (8)
Country | Link |
---|---|
US (1) | US2214950A (fi) |
CH (1) | CH201302A (fi) |
DE (1) | DE767607C (fi) |
FR (1) | FR818110A (fi) |
GB (1) | GB483349A (fi) |
IT (1) | IT349271A (fi) |
NO (1) | NO60897A (fi) |
SE (1) | SE101954C1 (fi) |
Cited By (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2430965A (en) * | 1942-04-21 | 1947-11-18 | Goss Printing Press Co Ltd | Inking mechanism using water base inks |
US2558504A (en) * | 1946-03-12 | 1951-06-26 | Aller Claes Borge | Method of producing a printing form having a bimetallic surface |
US2584317A (en) * | 1946-09-09 | 1952-02-05 | Aller Claes Bphirge | Method of producing bimetallic printing forms |
US2678299A (en) * | 1946-10-04 | 1954-05-11 | Printing Dev Inc | Method of making planographic printing plates |
US2690119A (en) * | 1951-05-25 | 1954-09-28 | Coates Brothers & Co | Bimetallic moistening roller for lithographic printing apparatus |
US2726200A (en) * | 1952-06-07 | 1955-12-06 | Kemart Corp | Lithographic plates and method of preparing |
US2753800A (en) * | 1952-03-24 | 1956-07-10 | Ohio Commw Eng Co | Production of printing plates |
US2760432A (en) * | 1950-05-06 | 1956-08-28 | Harris Seybold Co | Lithographic plate and method of making it |
US2907656A (en) * | 1953-11-12 | 1959-10-06 | Chrome Steel Plate Corp | Lithographic plates |
US3280736A (en) * | 1964-06-08 | 1966-10-25 | Metalgamica S A | Multi-metal planographic printing plates |
US3958994A (en) * | 1974-08-26 | 1976-05-25 | American Hoechst Corporation | Photosensitive diazo steel lithoplate structure |
US4480549A (en) * | 1980-03-17 | 1984-11-06 | Nippon Paint Co., Ltd. | Lithographic printing plate |
-
0
- IT IT349271D patent/IT349271A/it unknown
- NO NO60897D patent/NO60897A/no unknown
-
1936
- 1936-07-11 DE DEA79973D patent/DE767607C/de not_active Expired
-
1937
- 1937-02-10 SE SE69237A patent/SE101954C1/xx unknown
- 1937-02-19 FR FR818110D patent/FR818110A/fr not_active Expired
- 1937-03-01 GB GB6138/37A patent/GB483349A/en not_active Expired
- 1937-06-08 US US147140A patent/US2214950A/en not_active Expired - Lifetime
- 1937-11-25 CH CH201302D patent/CH201302A/de unknown
Cited By (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2430965A (en) * | 1942-04-21 | 1947-11-18 | Goss Printing Press Co Ltd | Inking mechanism using water base inks |
US2558504A (en) * | 1946-03-12 | 1951-06-26 | Aller Claes Borge | Method of producing a printing form having a bimetallic surface |
US2584317A (en) * | 1946-09-09 | 1952-02-05 | Aller Claes Bphirge | Method of producing bimetallic printing forms |
US2678299A (en) * | 1946-10-04 | 1954-05-11 | Printing Dev Inc | Method of making planographic printing plates |
US2760432A (en) * | 1950-05-06 | 1956-08-28 | Harris Seybold Co | Lithographic plate and method of making it |
US2690119A (en) * | 1951-05-25 | 1954-09-28 | Coates Brothers & Co | Bimetallic moistening roller for lithographic printing apparatus |
US2753800A (en) * | 1952-03-24 | 1956-07-10 | Ohio Commw Eng Co | Production of printing plates |
US2726200A (en) * | 1952-06-07 | 1955-12-06 | Kemart Corp | Lithographic plates and method of preparing |
US2907656A (en) * | 1953-11-12 | 1959-10-06 | Chrome Steel Plate Corp | Lithographic plates |
US3280736A (en) * | 1964-06-08 | 1966-10-25 | Metalgamica S A | Multi-metal planographic printing plates |
US3958994A (en) * | 1974-08-26 | 1976-05-25 | American Hoechst Corporation | Photosensitive diazo steel lithoplate structure |
US4480549A (en) * | 1980-03-17 | 1984-11-06 | Nippon Paint Co., Ltd. | Lithographic printing plate |
US4556462A (en) * | 1980-03-17 | 1985-12-03 | Nippon Paint Co., Ltd. | Method for producing a lithographic printing plate |
Also Published As
Publication number | Publication date |
---|---|
DE767607C (de) | 1953-04-09 |
IT349271A (fi) | |
SE101954C1 (fi) | 1941-07-08 |
NO60897A (fi) | |
GB483349A (en) | 1938-04-19 |
FR818110A (fr) | 1937-09-18 |
CH201302A (de) | 1938-11-30 |
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