Apparatus for producing a printing image by means of a laser

Details Apparatus for producing a printing image by means of a laser Apparatus for producing a printing image by means of a laser

2007-08-14

2007-08-14

Pham, Hai (Department: 2861)

Incremental printing of symbolic information

Light or beam marking apparatus or processes

Reexamination Certificate

active

11117415

ABSTRACT:
In an apparatus for producing a printing image on a printing medium held by a cylinder (1) by a laser, the laser writing head (7) of which is positioned on a crossmember (3) so as to be displaceable parallel to the axis of the cylinder (1), a space-saving functionally reliable embodiment is attained by the fact that a protective switch (10) which detects the presence of a cylinder (1) is provided fixedly on the crossmember (3) and the crossmember (3) bears switching strips (5, 6) which expose a laser writing head displacement region (b) between them having the width of the printing image (8) and interact with a further protective switch (11) attached to the laser writing head (7) for switching off the laser when it is situated outside the laser writing head displacement region (b).

REFERENCES:
patent: 4119032 (1978-10-01), Hollis
patent: 6186068 (2001-02-01), Gelbart
patent: 6249300 (2001-06-01), Kerr et al.
patent: 6792858 (2004-09-01), Kolbe et al.
patent: 2003/0090731 (2003-05-01), Knopf
patent: 198 45 711 (2000-06-01), None
patent: 0 962 316 (1999-12-01), None

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