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Apparatus for producing a printing image by means of a laser

  • US 20050241515A1
  • Filed: 04/29/2005
  • Published: 11/03/2005
  • Est. Priority Date: 04/30/2004
  • Status: Active Grant
First Claim
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1. An apparatus useful for producing a printing image on a printing medium held by a cylinder by a laser, the cylinder having an axis, the apparatus comprising:

  • a crossmember;

    a laser writing head positioned on the crossmember so as to be displaceable parallel to the axis of the cylinder;

    a first protective switch configured and arranged to detect the presence of a cylinder, the first protective switch being fixedly positioned on the crossmember;

    two switching strips on the crossmember which strips expose a laser writing head displacement region therebetween having a width of the printing image; and

    a second protective switch attached to the laser writing head configured and arranged to switch off the laser when the laser is situated outside the laser writing head displacement region;

    wherein the two switching strips and the second protective switch are mutually configured and arranged so that the second protective switch interacts with the two switching strips.

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