US3816699A - Engraving system for producing a screened rotary printing matrix with a variable diameter - Google Patents

Engraving system for producing a screened rotary printing matrix with a variable diameter Download PDF

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Publication number
US3816699A
US3816699A US00332128A US33212873A US3816699A US 3816699 A US3816699 A US 3816699A US 00332128 A US00332128 A US 00332128A US 33212873 A US33212873 A US 33212873A US 3816699 A US3816699 A US 3816699A
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United States
Prior art keywords
vacuum chamber
electron beam
engraving
housing
engraving system
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
US00332128A
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English (en)
Inventor
K Wellendorf
P Padberg
B Struck
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.)
Hell R dt GmbH
HELL R GmbH
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HELL R GmbH
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 HELL R GmbH filed Critical HELL R GmbH
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Publication of US3816699A publication Critical patent/US3816699A/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41C—PROCESSES FOR THE MANUFACTURE OR REPRODUCTION OF PRINTING SURFACES
    • B41C1/00—Forme preparation
    • B41C1/02—Engraving; Heads therefor
    • B41C1/04—Engraving; Heads therefor using heads controlled by an electric information signal
    • B41C1/05—Heat-generating engraving heads, e.g. laser beam, electron beam
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J37/00—Discharge tubes with provision for introducing objects or material to be exposed to the discharge, e.g. for the purpose of examination or processing thereof
    • H01J37/30—Electron-beam or ion-beam tubes for localised treatment of objects
    • H01J37/301—Arrangements enabling beams to pass between regions of different pressure

Definitions

  • a method which employs an electronic beam, as the engraving means, with which one is able to produce the necessary cup-shaped engravings reliably and, with a desired speed.
  • This method and the associated apparatus for practicing the method generally resides in that for the processing of an object according to a desired reproduction plan, by means of a charge carrying beam the picture is recorded. More particularly, the picture is recorded by means of a TV camera and during the recording the deflecting signals used for controlling the scanning beam of the TV camera tube are used simultaneously for the synchronized deflection of the charge carrying beam which is processing the object to be reproduced. At the same time the video-signals delivered from the TV camera are used to control the intensity of the charge carrying beam falling on the object under processing.
  • cup-shaped engravings can be made, however, one cannot attain a desirable engraving speed notwithstanding the fact that the fact that the electronic beam can be very quickly deflected within a vacuum chamber into which the workpiece is also placed. It has been found that only very few cup-shaped engravings can be made, since in the apparatus proposed by such method the advancing of the printing matrix or cylinder is slow. Probably a speed could be attained with such method if the vacuum chamber would be dimensioned so large that the printing matrix could be passed within the vacuum chamber with a desired speed in front of the system producing the electron beam. This would, however, require an enormous out-lay respecting the size of the vacuum chamber, since the printing cylinder has a length of several meters and also a large diameter. Also the mounting and removal of the printing cylinder into and out of the vacuum chamber would require long idle machine times, to which the time required for the evacuation of the chamber is still to be added.
  • an object of the present invention to provide an improved engraving system which eliminates the above described disadvantages of the known apparatus and stystems and, which permits in a simple fashion to perform the engraving of printing cylinders having different diameters with the same beam device.
  • one or several interchangeable members are provided which define the relation between the vacuum chamber and the printing cylinder when different diameter cylinders are used and, which members are provided with conical sealing surfaces with respect to the vacuum chamber housing.
  • FIG. 1 is a schematic representation, in section, of the engraving system and its position with respect to a printing cylinder;
  • FIG. 2 is a sectional view along the line A-B in FIG. 1.
  • FIG. 1 illustrating an engraving system constructed according to the present invention and to be used in a manner with a printing cylinder as described in our copending US. Pat. application Ser. No. 322,129 filed Feb. 13, 1973.
  • the engraving system illustrated in FIG. 1 consists of a vacuum chamber housing I having the shape of a rotational body of the cylindrical type, and which is provided with suction connections 2, 3 which lead to one or several vacuum pumps, not shown in the drawings for the sake of simplicity.
  • the chamber 1 has a central portion 4 in which the electron beam system, hereinafter described, is placed and which produces a charge carrying electron beam 5 falling on a predetermined portion of the printing cylinder 6 under engraving and performs the engraving operation.
  • the vacuum chamber 1 has a removable lower portion 7 which by means of a pair of annular cone-shaped surfaces 8 is in gastight connection with the upper wall portions of the chamber 1.
  • the member 7 is dimensioned to follow the contour of the upper surface of the printing cylinder 6 and, according to the present invention, it can be exchanged for another member 7 having a curvature to follow the appropriate curvature of a new printing cylinder having a different diameter and which is to be used at that process.
  • the dimensioning of the exchangeable member 7 is such that there is always a defined gap 9 formed between the vacuum chamber housing 1 and the printing cylinder 6 nothwithstanding the fact that the diameter of the printing cylinder has changed.
  • Such a gap 9 is dimensioned so that a sufficient vacuum is always present within the vacuum chamber 1 and substained by the vacuum pumps at a level which assures a reliable operation of the electron beam 5.
  • FIG. 2 illustrating a section through the vacuum chamber 1 along the line A B in the FIG. 1, it is seen that the center portion 4 of the vacuum chamber 1 accomodates the electron beam.
  • stiffening ribs 10 extending to the beam housing wall 4a.
  • an exchangeable electron-passing foil 41 covering the vacuum chamber 1.
  • Such foil 41 can be secured in its place by means of annular clamping means 42 securing it on the central portion 4a of the vacuum chamber l.
  • An engraving system for producing screened printing matrices on printing cylinders of different diameters comprising, in combination:
  • a vacuum chamber housing comprising a vacuum chamber having a reduced pressure, a housing member having an opening defined therein in the part thereof in the direction of the upper surface of a printing cylinder and having at the opening a curvature conforming to said printing cylinder and coupling means for removably coupling said housing member to said vacuum chamber, electron beam means for producing an electron beam for performing the engraving operation on said printing cylinder, said electron beam means being located within said vacuum chamber housing, said electron beam being directed towards the opening of said vacuum chamber housing, and means for defining a predetermined gap between said housing member and said printing cylinder.
  • said coupling means is an annular cone-shaped projection formed on said housing member for forming a gas-tight coupling for said vacuum chamber.
  • said vacuum chamber comprises a central portion guiding the electron beam, the dimensions of said gap being such that the reduced pressure of said vacuum chamber is sustained enabling a reliable operation of said electron beam means.
  • said housing means comprises stiffening ribs for abutting said central portion of said vacuum chamber containing said electron beam guiding means.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Plasma & Fusion (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Manufacture Or Reproduction Of Printing Formes (AREA)
  • Welding Or Cutting Using Electron Beams (AREA)
US00332128A 1972-02-15 1973-02-13 Engraving system for producing a screened rotary printing matrix with a variable diameter Expired - Lifetime US3816699A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2207090A DE2207090A1 (de) 1972-02-15 1972-02-15 Graviersystem zur herstellung gerasterter druckformen

Publications (1)

Publication Number Publication Date
US3816699A true US3816699A (en) 1974-06-11

Family

ID=5836024

Family Applications (2)

Application Number Title Priority Date Filing Date
US00332128A Expired - Lifetime US3816699A (en) 1972-02-15 1973-02-13 Engraving system for producing a screened rotary printing matrix with a variable diameter
US00332129A Expired - Lifetime US3816698A (en) 1972-02-15 1973-02-13 Arrangement for producing screened printing forms, such as printing cylinders, by means of an electron beam

Family Applications After (1)

Application Number Title Priority Date Filing Date
US00332129A Expired - Lifetime US3816698A (en) 1972-02-15 1973-02-13 Arrangement for producing screened printing forms, such as printing cylinders, by means of an electron beam

Country Status (4)

Country Link
US (2) US3816699A (enrdf_load_stackoverflow)
DE (1) DE2207090A1 (enrdf_load_stackoverflow)
GB (1) GB1422198A (enrdf_load_stackoverflow)
NL (2) NL7301895A (enrdf_load_stackoverflow)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4071731A (en) * 1974-03-16 1978-01-31 Dr. -Ing. Rudolf Hell Gmbh Matrix engraving by electron beams
US4317982A (en) * 1978-05-08 1982-03-02 Dr. Ing. Rudolf Hell Gmbh Orifice for coupling an electron beam gun to print form cylinders
US6530317B2 (en) 2000-12-05 2003-03-11 Creo Srl Method to engrave surface using particle beam

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2819993C3 (de) * 1978-05-08 1982-01-28 Dr.-Ing. Rudolf Hell Gmbh, 2300 Kiel Mundstück zur Ankoppelung einer Elektronenstrahlkanone an Druckformzylinder
DE2834458A1 (de) * 1978-08-05 1980-02-14 Hell Rudolf Dr Ing Gmbh Mundstueck zur ankopplung einer elektronenstrahlkanone an druckformoberflaechen
US4607167A (en) * 1982-10-19 1986-08-19 Varian Associates, Inc. Charged particle beam lithography machine incorporating localized vacuum envelope
EP0109147A3 (en) * 1982-10-19 1986-04-16 Varian Associates, Inc. Charged particle beam lithography machine incorporating localized vacuum envelope
DE3382460D1 (de) * 1982-10-19 1991-12-19 Varian Associates Bearbeitungsgeraet mit einer vorrichtung zur erzeugung eines lokalisierten vakuums.
DE4038183C2 (de) * 1990-11-30 1994-10-20 Hell Ag Linotype Verfahren und Vorrichtung zur Ausrichtung eines Elektronenstrahls relativ zu einem Bezugsobjekt
DE19720877A1 (de) * 1997-05-17 1998-11-19 Anatolii Dipl Ing Fel Verfahren zur Herstellung von Abbildungen auf Glas, Stein und anderen harten Materialien durch Zerstörung ihrer Oberfläche

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3136883A (en) * 1962-04-02 1964-06-09 United Aircraft Corp Seal for moving electron beam column
US3678241A (en) * 1970-07-31 1972-07-18 Continental Can Co Inert atmosphere tack welder

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3402278A (en) * 1965-06-14 1968-09-17 United Aircraft Corp Electron beam cutting of printing plates

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3136883A (en) * 1962-04-02 1964-06-09 United Aircraft Corp Seal for moving electron beam column
US3678241A (en) * 1970-07-31 1972-07-18 Continental Can Co Inert atmosphere tack welder

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4071731A (en) * 1974-03-16 1978-01-31 Dr. -Ing. Rudolf Hell Gmbh Matrix engraving by electron beams
US4317982A (en) * 1978-05-08 1982-03-02 Dr. Ing. Rudolf Hell Gmbh Orifice for coupling an electron beam gun to print form cylinders
US6530317B2 (en) 2000-12-05 2003-03-11 Creo Srl Method to engrave surface using particle beam

Also Published As

Publication number Publication date
NL7301896A (enrdf_load_stackoverflow) 1973-08-17
DE2207090A1 (de) 1973-09-06
US3816698A (en) 1974-06-11
NL162013C (nl) 1980-04-15
NL7301895A (enrdf_load_stackoverflow) 1973-08-17
GB1422198A (en) 1976-01-21
NL162013B (nl) 1979-11-15

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