Agfa-gevaert Ag

Mlt Micro Laser Technology Gmbh

Walter Herrmann

Albert Maier

Helmut Paul

Karl Steinsberger

An apparatus for substrate treatment by means of laser radiation includes a rotating polygonal mirror by which at least one incident laser beam is reflected and is pivotable across an arrangement of converging lenses which lie next to one another and which are arranged at a spacing from the substrate corresponding precisely or approximately to their focal lengths. The rotating polygonal mirror is divided into at least two regions having a different number of facets and is adjustable such that different regions can be introduced into the beam path of the laser radiation and accordingly different sweep angles or fan angles of the laser beam reflected by the rotating polygonal mirror can be set.

Device for substrate treatment by means of laser radiation

Apparatus is disclosed for threading tapping holes in workpieces wherein the tapping hole is surrounded by a surface having alternating recesses and arcuate projections which are to be threaded. The apparatus has a hold-down plate one side of which is movable against the exposed side of the workpiece, a carrier which is reciprocable toward and away from the workpiece by a plunger and a spring, a tool holder which has external threads meshing with the internal threads of a nut in the hold-down plate and a helical cam groove receiving a pin of the carrier, and a fluted tap which is coaxially affixed to the holder and extends into the tapping hole when the hold-down plate abuts against the workpiece whereby the externally threaded ribs of the tap which alternate with the flutes extend into the recesses in the surface surrounding the tapping hole. The carrier is thereupon moved toward the hold-down plate to cause the tool holder to rotate whereby the tool holder moves axially and the tap cuts or rolls threads into the projections between the recesses in the surface surrounding the tapping hole. The length of the cam groove determines the extent of rotation of the tap, and such extent is selected with a view to ensure that each rib of the tap moves from a preceding recess into the next-following recess when the surface bounding one end of the cam groove terminates the movement of the carrier toward the hold-down plate. The carrier, the means for moving the carrier and the hold-down plate can constitute parts of a stamping machine.

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Munich, Germany

Walter Herrmann