Patent ID: 7256810
Filing Date: 2007-08-14
Classification: B41F,B41P

Abstract:
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.