Printing form processing with fine and coarse engraving tool processing tracks
In a method for forming printing indicia to accept printing ink on a processing surface of a printing form associated with a printing cylinder, a first engraving tool is provided directed onto the processing surface of the printing form which creates a fine processing track. A second engraving tool is also directed onto the same processing surface which creates a coarse processing track.
1 - 263 . (canceled)
264 . A method for engraving rotogravure cups to accept printing ink on a processing surface of a rotogravure printing cylinder, comprising the steps of:
providing a first laser beam directed onto the processing surface of the printing cylinder which creates a fine processing track; and
also directing onto the same printing cylinder processing surface a second laser beam which creates a coarse processing track.
265 . A method of claim 264 wherein the first and second laser beams are modulated so that the first laser beam for the fine track creates a plurality of fine rotogravure cups and the second laser beam for the coarse track creates a plurality of coarse rotogravure cups.
266 . A method of claim 264 wherein the laser beam for at least the fine track is generated by a fiber laser.
267 . A method of claim 264 wherein the laser beam for the fine track has a spot size diameter at the processing surface of 10 μm or less.
268 . A method of claim 264 wherein the laser beam for the fine track has a spot size diameter at the processing surface of approximately 20 μm or less.
269 . A method of claim 264 wherein the first and second laser beams are amplitude modulated.
270 . A method of claim 264 wherein the processing surface comprises metal.
271 . A method for engraving rotogravure cups to accept printing ink on a processing surface of a rotogravure printing cylinder, comprising the steps of:
providing a first laser beam directed onto the processing surface of the printing cylinder which creates a fine processing track in which fine rotogravure cups are created; and
also directing onto the same printing cylinder processing surface a second laser beam which creates a coarse processing track in which coarse rotogravure cups are created.
272 . A method for engraving rotogravure cups to accept printing ink on a processing surface of a rotogravure printing cylinder, comprising the steps of:
providing a first laser beam directed onto the processing surface of the printing cylinder having a spot size of approximately 20 μm or less which creates a fine processing track in which fine rotogravure cups are created; and
also directing onto the same printing cylinder processing surface a second laser beam which creates a coarse processing track in which coarse rotogravure cups are created.
273 . A method for forming printing indicia to accept printing ink on a processing surface of a printing form associated with a printing cylinder, comprising the steps of:
providing a first engraving tool directed onto the processing surface associated with the printing cylinder which creates a fine processing track; and
also directing onto the same processing surface a second engraving tool which creates a coarse processing track.