Engraving method and apparatus using cooled magnetostrictive actuator
AssigneeOhio Electronic Engravers, Inc.
InventorLester W. Buechler
Life of this patent
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Abstract
An engraving head apparatus and method for engraving a gravure cylinder is shown. The engraving head apparatus includes a magnetostrictive actuator formed from a magnetostrictive material such as Tb.sub.1 Dy.sub.1-x. which elongatably drives a diamond-tipped stylus arm in a reciprocal manner in response to a varying magnetic field created by a bias coil and a drive coil. A cryogenic cooling mechanism is used to cool the magnetostrictive actuator when driving the stylus.
Claims20
A method for engraving a pattern of cells in a cylinder rotatably mounted on an engraver comprising the steps of:
- coupling a stylus to a magnetostrictive member;
- rotating the cylinder;
- energizing said magnetostrictive member to oscillate said stylus;
- and
- cooling said magnetostrictive member with a cryogenic fluid.
A method for engraving a pattern in a cylinder rotatably mounted on an engraver comprising the steps of:
- coupling a stylus to a magnetostrictive member formed from a magnetostrictive material comprising Tb.sub.1 Dy.sub.1-x ;
- rotating the cylinder;
- and
- energizing said magnetostrictive member to oscillate said stylus to engrave said pattern;
- thereby cooling said magnetostrictive member with a fluid.
An engraving head for use in an engraver comprising:
- a housing;
- an engraving stylus for engraving a cylinder positioned at an engraving station of said engraver;
- a magnetostrictive member situated in said housing and operatively coupled to said engraving stylus;
- an energizer for energizing said magnetostrictive member which causes said engraving stylus to oscillate to engrave a pattern on a surface of said cylinder;
- and
- a cryogenic cooling means for absorbing heat generated by said magnetostrictive member when energized by said energizer.
An engraving head for use in an engraver comprising:
- a housing;
- an engraving stylus for engraving a cylinder positioned at an engraving station of said engraver;
- a magnetostrictive member formed from a magnetostrictive material comprising Tb.sub.1 Dy.sub.1-, said magnetostrictive member being positioned within said housing and operatively coupled to said engraving stylus;
- an energizer for energizing said magnetostrictive member which causes said engraving stylus to oscillate to engrave a pattern of cells on a surface of said cylinder;
- and
- cooling means for absorbing heated generated by said magnetostrictive member when energized by said energizer.
An engraving head for use in an engraver comprising:
- a housing;
- an engraving stylus for engraving a cylinder positioned at an engraving station of said engraver;
- a magnetostrictive member situated in said housing and operatively coupled to said engraving stylus;
- an energizer for energizing said magnetostrictive member which causes said engraving stylus to oscillate to engrave a pattern on a surface of said cylinder;
- a cooling means for absorbing heat generated by said magnetostrictive member when energized by said energizer;
- wherein said stylus oscillates at frequencies in excess of 10 KHz.
An engraving head for use in an engraver comprising:
- a housing;
- an engraving stylus for engraving a cylinder positioned at an engraving station of said engraver;
- a magnetostrictive member formed from a magnetostrictive material comprising Tb.sub.1 Dy.sub.1-x, said magnetostrictive member being positioned within said housing and operatively coupled to said engraving stylus;
- and
- an energizer for energizing said magnetostrictive member which causes said engraving stylus to oscillate to engrave a pattern of cells on a surface of said cylinder;
- wherein said stylus oscillates at frequencies in excess of 12 KHz.
Dependencies are inferred from the claim text.