Hollow engraving points, holders and cleaning device for engraving coated sheets

Claim 1

IN A HOLLOW ENGRAVING POINT AND HOLDER FOR ENGRAVING OPAQUE COATED TRANSPARENT SHEETS, A BODY HAVING AN AXIAL BORE AND RELATIVELY MOVABLE IN ANY DIRECTION PERPENDICULAR TO SAID BORE ABOVE SAID OPAQUE COATED TRANSPARENT SHEET, A SCRIBING PLUNGER AXIALLY SLIDABLE IN SAID BORE, AN ENGRAVING POINT ASSEMBLY CARRIED BY SAID PLUNGER HAVING AN ENGRAVING POINT WITH AN ENGRAVING TIP AND FORMED WITH A CONCENTRIC SUCTION PASSAGE THERETHROUGH OPENING INWARDLY THROUGH SAID ENGRAVING TIP FOR RECEIVING AND REMOVING DEBRIS AND PLUGS FROM THE OPAQUE COATING DISPLACED BY CONTACTING ENGAGEMENT OF SAID ENGRAVING TIP WITH THE OPAQUE COATED SURFACE, AN ANNULAR ELONGATED SLEEVE-LIKE VACUUM JACKET CONCENTRICALLY SURROUNDING SAID POINT IN CLOSELY SPACED ADJACENT RELATION TO SAID ENGRAVING TIP AND TO THE OPAQUE COATING OF THE TRANSPARENT SHEET WHEN SAID ENGRAVING TIP IS IN ENGRAVING ENGAGEMENT WITH SAID OPAQUE COATING, SUCTION MEANS IN COMMUNICATION WITH SAID CONCENTRIC SUCTION PASSAGE WHICH EXTENDS THROUGH SAID ENGRAVING POINT, AND IN COMMUNICATION WITH THE INTERIOR OF VACUUM JACKET AND SAID ENGRAVING POINT FOR WITHDRAWING DEBRIS DISPLACED FROM SAID OPAQUE COATED TRANSPARENT SHEET BY SAID ENGRAVING TIP IN AN AREA COMPLETELY SURROUNDING SAID TIP DURING RELATIVE ENGRAVING MOVEMENT IN ANY DIRECTION BETWEEN THE ENGRAVING TIP AND THE OPAQUE COATED TRANSPARENT SHEET.