Method for generating raised or recessed structures on hollow bodies, preferably comprised of glass
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United States of America Patent
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Feb 28, 2012
Grant Date -
Oct 15, 2009
app pub date -
Apr 9, 2009
filing date -
Apr 9, 2008
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Abstract
The invention relates to a method for the generation of raised and/or recessed structures on workpieces comprising the steps: applying a pressure difference between one side of a wall of the workpiece and another side substantially opposite thereto; local heating of the wall of the workpiece to a softening temperature of the workpiece by a heat source in order to induce local deformation of the wall of the workpiece; and cooling of the workpiece. The invention relates, moreover, to an apparatus for carrying out this method.
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