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
  • B41N1/083—Printing plates or foils; Materials therefor metallic for lithographic printing made of aluminium or aluminium alloys or having such surface layers
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B32—LAYERED PRODUCTS
  • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
  • B32B15/00—Layered products comprising a layer of metal
  • B32B15/01—Layered products comprising a layer of metal all layers being exclusively metallic
  • B32B15/016—Layered products comprising a layer of metal all layers being exclusively metallic all layers being formed of aluminium or aluminium alloys
• • C—CHEMISTRY; METALLURGY
  • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
  • C22C—ALLOYS
  • C22C21/00—Alloys based on aluminium
  • C22C21/06—Alloys based on aluminium with magnesium as the next major constituent
  • C22C21/08—Alloys based on aluminium with magnesium as the next major constituent with silicon
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10S428/00—Stock material or miscellaneous articles
  • Y10S428/922—Static electricity metal bleed-off metallic stock
  • Y10S428/923—Physical dimension
  • Y10S428/924—Composite
  • Y10S428/925—Relative dimension specified
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
  • Y10T428/00—Stock material or miscellaneous articles
  • Y10T428/12—All metal or with adjacent metals
  • Y10T428/12431—Foil or filament smaller than 6 mils
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
  • Y10T428/00—Stock material or miscellaneous articles
  • Y10T428/12—All metal or with adjacent metals
  • Y10T428/12493—Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, joint, etc.]
  • Y10T428/12639—Adjacent, identical composition, components
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
  • Y10T428/00—Stock material or miscellaneous articles
  • Y10T428/12—All metal or with adjacent metals
  • Y10T428/12493—Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, joint, etc.]
  • Y10T428/12736—Al-base component
  • Y10T428/12764—Next to Al-base component

Definitions

• An aluminum printing plate for use in offset roller plating is made of an aluminum base alloy including the following alloying components:
• a material consisting of aluminum as the base material with a purity of 99% and more has already been used for printing plates in offset printing, particularly for single-color prints. However, these plates were not suitable for so-called roller offset printing. If the aluminum plate or sheet has a tensile strength of about 16 to 18 kp./mm. as required to obtain the necessary stability and rigidity, the danger of tearing of the sheet at the sharp-angled clamping edges is substantial. These edges, however, are necessary for the narrow, tight clamping of the offset plates on the rollers of the printing machine. A tearing of the sheet is particularly obnoxious if it occursnot during the initial angling of the edges or during the clamping butby virtue of the centrifugal force during actual operation such as results from the high rotation speed of the printing cylinder.
• 'It is therefore an object of the present invention to provide for printing plates for offset roller printing processes which (a) have a high rigidity to be stored in upstanding position and also to assure form stability during high rotation speeds; (b) are sufficiently flexible to permit that the plates, when clamped on the printing cylinder, conform smoothly and exactly to the surface of the cylinder; and (c) have good angling properties so as to prevent tearing during the acute angle folding or subsequently when subjected to a high tensile stress.
• an offset printing plate which consists of an aluminum base alloy and includes the following alloying components in the following percentages by reference to the weight of the total composition Percent Magnesium 0.8-2.5 Silicon 0.2-0.4 Manganese 0.8-1.4 Copper 0.05-0.3 Iron 0.2-0.6 Zinc 0.01-0.2 Aluminum Balance DESCRIPTION OF THE PREFERRED EMBODIMENTS
• the print- 3,672,878 Patented June 27, 1972 "ice ing plate of the invention may also include 0.01 to 0.05% titanium, and 0.001 to 0.005% boron.
• the preferred composition for the printing plates would be as follows:
• Another preferred embodiment would be constituted as just described, but would additionally include 0.03% titanium and 0.003% boron.
• the alloy furthermore has a sufficient flexibility.
• the plates therefore, when clamped onto the printing cylinder, can be made to conform completely to the cylinder.
• the aluminum base plates formed as described are provided on both major faces with plating layers. These layers may be applied by conventional roller plating processes.
• the plating may for instance consist of pure aluminum of a degree of purity between 99 and 99.9%.
• the plating layer has a thickness between 2 and 16% relative to the thickness of the entire plate. The thickness just stated for the layer applies to each separate plating layer.
• the ofliset plate may be anodized. Particularly preferred would be an aluminum plating of a purity of about 99.4%
• the plates most preferably are provided with plating layers on both major faces which layers are composed like the principal material, that is, the aluminum coating contains the same components as the core material but in different percentages.
• the total plating layers may for instance have a thickness of about 8% relative to the total thickness of the entire plate.
• the total plate may for instance after plating have a thickness of 0.50
• EXAMPLE 1 An aluminum offset printing plate was formed by plating in a roller plating process an aluminum core with layers having a combined thickness of about 8% of the total thickness of the plate. The total thickness was 0.50 mm.
• composition of the aluminum alloy employed was as follows (all percentages relative to weight of the total composition) Core element: Percent Copper 0.15 Manganese 1.10 Magnesium 1.12 Silicon 0.30
• EXAMPLE 2 The same type of printing plate was formed as described in Example 1. However, the composition of the core material and plating layers was as follows:
• the printing plate of this example had the following properties -Yield point: 24 kp./mm.
• the printing plate of this example had the following properties:
• the printing plates of all three examples as above described had excellent properties for roller oflset printing and were generally considered acceptable by the printers.
• An aluminum printing plate for use in offset roller printing consisting of an aluminum base alloy including the following alloying components:
• Aluminum Balance 2 The printing plate of claim 1 which includes 0.01 to 0.05% titanium and 0.001 to 0.005% boron.
• the printing plate of claim 1 wherein the aluminum base alloy includes the following alloying components in the following percentages:
• the printing plate of claim 3 which includes 0.03% titanium and 0.003% boron.

Landscapes

• Chemical & Material Sciences (AREA)
• Engineering & Computer Science (AREA)
• Materials Engineering (AREA)
• Mechanical Engineering (AREA)
• Metallurgy (AREA)
• Organic Chemistry (AREA)
• Printing Plates And Materials Therefor (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=25755897

Family Applications (2)

Family Applications After (1)

Country Status (8)

Cited By (4)

Families Citing this family (17)

• 1969
  • 1969-09-02 NO NO3511/69A patent/NO120955B/no unknown
  • 1969-09-05 BE BE738445D patent/BE738445A/xx unknown
  • 1969-09-08 FR FR6930466A patent/FR2018993A1/fr not_active Withdrawn
  • 1969-09-09 LU LU59419D patent/LU59419A1/xx unknown
  • 1969-09-24 US US860805A patent/US3672878A/en not_active Expired - Lifetime
  • 1969-09-25 GB GB47297/69A patent/GB1222777A/en not_active Expired
  • 1969-09-26 NL NL6914659A patent/NL6914659A/xx unknown
  • 1969-09-26 SE SE13315/69A patent/SE347292B/xx unknown
• 1971
  • 1971-10-26 US US00192621A patent/US3717915A/en not_active Expired - Lifetime

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