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
  • B41C1/02—Engraving; Heads therefor
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B44—DECORATIVE ARTS
  • B44B—MACHINES, APPARATUS OR TOOLS FOR ARTISTIC WORK, e.g. FOR SCULPTURING, GUILLOCHING, CARVING, BRANDING, INLAYING
  • B44B3/00—Artist's machines or apparatus equipped with tools or work holders moving or able to be controlled substantially two- dimensionally for carving, engraving, or guilloching shallow ornamenting or markings

Definitions

• the invention relates to a method for engraving texts and images on printing cylinders using an electronic Engraving machine and a device for Execution of such a procedure.
• the said line engraving is used for the engraving of the impression cylinder used.
• the engraving tool for example a stylus
• the engraving data is dependent on the engraving data based on the print data inserted at different depths in the impression cylinder, without the signal necessary for line engraving is superimposed by a signal that the vibration engraving performs. That is, only in those places of the impression cylinder on which to carry out an engraving process is the engraving element or the stylus in the The printing cylinder is immersed.
• the object is achieved according to the invention in view on the process in that both an engraving process using the line engraving method as well as an engraving method according to the method of vibration engraving for Execution of the engraving process of the impression cylinder used become.
• the advantage of the method according to the invention lies in essential in that both engraving methods in the inventive methods are used in this way can that they have their respective advantages, namely great Contour accuracy and the creation of large printing ink volumes, can virtually unite, being for the execution of the method that provided for the overall engraving process Amount of data related to those to be printed Text and image information used almost simultaneously can be.
• Procedure an increase in the size for the overall engraving process of the printing cylinder in time Measures greater than the time it takes to run either the vibration engraving would be required or for execution a line engraving, this time increase can but by increasing the speed of each Engraving methods according to the invention in a wide range be compensated.
• the method becomes the text component of the engraving and the image component engraving with different engraving methods generated.
• the invention Overall procedures are operated so that for in each case different components of the Engraving, namely text engraving and image engraving, the most suitable method for each of these engravings is used.
• the line engraving for the engraving of the text and the Vibration engraving is used to engrave the images so that e.g. the line engraving only applies to those print data limited, which also increased as required Detail reproduction should do justice.
• the data representing the texts is the procedure to carry out the line engraving and those representing the images Vibration engraving data generated as separate databases if
• the basic data stock separated into image and text components is present.
• the image component is usually included with data a resolution of 120 to 200 lines per centimeter before, while the text component is several times higher Has resolution.
• CT data continuous tone
• LW data line work
• the method according to the invention is a common one Texts and data representing the images to perform the engraving before, being used for execution the entire engraving, a data set for the Execution of the line engraving and a data set for the Vibration engraving can be separated. at the presence of a text and pictures representing each common database is called "All-in-CT data.”
• Data and text representing images (all-in-CT data) generate a subset of data with the least partly both positive and negative Writings of texts as well as at least partially pictures be engraved. Not only the contour, but the entire LW data is regenerated, in such a way that not only the contour is reproduced will, but these areas will be interconnected, so that in the LW database, as I said, both positive / negative fonts as well as areas, which are done with line engraving, whereas the remaining CT database with the usual Screening can be documented and with the vibration engraving is applied to the impression cylinder.
• the text component by means of the method according to the invention the engraving at least in part through use using the method of vibration engraving, i.e. for certain parts of the the contours in their entirety, including the contours of texts or letters not separately with the Execute line engraving, but certain selected ones Areas of the texts only with the method of Engrave vibration engraving.
• An apparatus for performing the above Process for engraving texts and images on printing cylinders using an electronic engraving machine is characterized in that the engraving system both close to the line engraving method as well Can be controlled and driven using the vibration engraving method is.
• the advantage of the basic design of the invention Device is that only one Engraving system is provided that includes both the line engraving as well as vibration engraving.
• This Basic design of the device has the advantage that the basic principles of constructive design Such device compared to the previous one designed for line engraving and vibration engraving Devices of known type are used can, so that such a device inexpensive can be provided, even if the time required with which the overall engraving should be carried out on the basis of Use of an engraving system for both types of engraving is relatively high.
• At least one engraving system for the Execution of the line engraving and at least one engraving system intended for the execution of the vibration engraving is.
• the engraving system for the execution of the line engraving and for the execution the vibration engraving can be controlled and driven sequentially is.
• the vibration engraving first and then the line engraving or vice versa.
• sequential control and sequential Drive of a uniform single engraving system is possible, in which case the sequential Engraving by exchanging filter parameters with respect to the total engraving Data takes place, i.e. by filtering the The engraving system then performs data after performing the data the first type of engraving selected, the second type selected the engraving.
• the invention is now based on the device described to carry out the method.
• An electronic engraving machine for example, is considered to be state of the art for the engraving of printing cylinders as they are made of DE-C-25 08 734 is known.
• the experts are such electronic engraving machines have long been known so that there is no detailed description here becomes. It should only be pointed out that the Device for engraving text or images on Printing cylinders using an electronic engraving machine So far at least one engraving system for execution the engraving included.
• the tool with which the impression cylinder is used to execute its engraving is regularly a diamond, usually used to carry out the vibration engraving an angle of 120 to 130 degrees, based on a imagined solder on the surface of the engraving Printing cylinder has.
• the angle can be chosen smaller as the stresses on the diamond due to the regularly lower number of punctures in the surface of the impression cylinder compared to those of the vibration engraving are reduced. The result is that in the case the line engraving of the diamond is regularly larger Has service life.
• the line depth is the engraving depth at max. 120 ⁇ m.
• engraved impression cylinders are said to the line engraving was used for the execution the contours of the text or the LW data absolutely comparable volumes as in the case of vibration engraving can be achieved.
• the engraving depths in the order of 15 to 25 ⁇ m, it has been shown that despite this in any case for Engraving depth of the pure line engraving of low value sufficient due to the areal distribution Volume is achievable.
• the line engraving and the vibration engraving are done with the same Diamond operated.
• An exchange of diamonds between Both types of engraving are then no longer necessary.
• larger angles of pressure can be used, For example, a diamond angle of 130 or 140 degrees, if e.g. water colors are used for the printing process should.
• a diamond angle of 130 or 140 degrees if e.g. water colors are used for the printing process should.
• the vibration engraving and line engraving with a single engraving system or feasible on a single diamond.
• a line spacing of equal or finer than 47 ⁇ m or e.g. in the order of magnitude of 50 ⁇ m can be selected.

Landscapes

• Engineering & Computer Science (AREA)
• Manufacturing & Machinery (AREA)
• Manufacture Or Reproduction Of Printing Formes (AREA)

Priority Applications (3)

Applications Claiming Priority (1)

Publications (1)

Family

ID=32864979

Family Applications (1)

Country Status (3)

Citations (2)

• 2003
  • 2003-04-09 EP EP03008276A patent/EP1466726A1/fr not_active Withdrawn
  • 2003-05-27 JP JP2003149664A patent/JP2004306576A/ja active Pending
  • 2003-05-30 CN CNA03138191XA patent/CN1535816A/zh active Pending

Patent Citations (2)

Non-Patent Citations (1)

Also Published As

Similar Documents

Legal Events