Method and apparatus for producing wells in the surface of a rotogravure cyclinder with a laser
December 20, 2016. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent ReferencesMethod and apparatus for forming microcavities on the surface of a rolling mill roll Method for correcting beam intensity upon scanning and recording a picture Multi-beam roller phototracer Method and apparatus for roll dulling by pulse laser beam Laser machining device comprising an acousto-optic modulator unit Acousto-optical intensity control of laser beam during etching of optical servo information of magnetic media Cooling drum for casting thin cast pieces and method and apparatus for forming dimples in peripheral surface of the drum Laser engraving apparatus Laser image setter Patent #: 5459505 InventorsAssigneeApplicationNo. 765089 filed on 12/20/1996US Classes:219/121.61, Beam energy control219/121.68, Etching or trimming219/121.76Multiple beamsExaminersPrimary: Mills, GregoryAttorney, Agent or FirmForeign Patent References
International ClassesB23K 026/08121.85 121.71 Foreign Application Priority Data1995-05-03 CHAbstractA method and a device for particularly rapidly producing wells (18) in the surface of a rotating rotogravure cylinder (2) by a pulsed laser beam (13), which is deflected and directed via an optical lens (7) onto the surface of the rotogravure cylinder (2) to be processed. The power of a single laser beam pulse is adjusted in such a way that it is sufficient for removing the maximum volume needed for a well (18). Furthermore, the laser beam (13) is deflected by an optoacoustic modulator (8) by diffraction onto the optical axis of the lens (7), and the individual laser beam pulses are controlled in their pulse power by the same modulator (8) in accordance with the volumes of the wells to be formed. | |
