Patent ID: 7338611
Filing Date: 2008-03-04
Classification: B41J,B81B,B81C

Abstract:
1. A method comprising: forming a first slot portion into a substrate, the first slot portion being formed into a first surface of the substrate and extending to a first depth that is less than a thickness of the substrate as defined between the first surface and a generally opposing second surface of the substrate, the first slot portion having an oval shape defining a footprint at the first surface of the substrate, the oval shape having an inner perimeter and an outer perimeter spaced from the inner perimeter defined in the first surface; removing additional substrate material through the first surface of the substrate to form a second slot portion to a second depth in the substrate, including maintaining the outer perimeter of the oval shape of the footprint at the first surface of the substrate and removing all substrate material within the outer perimeter of the oval shape to the second depth; and removing substrate material through the second surface of the substrate to at least the second slot portion to form a slot extending between the first surface and the second surface of the substrate.