Patent ID: 8474300

Claim:
A method for creating a feature on a needle, the method comprising: providing a needle having a tube wall defined by an inner diameter and an outer diameter, the needle further having a length; inserting a stylet into a hollow interior of the needle; providing a lubricant between the stylet and the hollow interior of the needle; providing a crimping device having a first anvil and a second anvil, the first and second anvils having opposing planar crimping surfaces, an opposing portion of each planar crimping surface comprising a singular arched surface having a signal curve, wherein a maximum diameter of the singular arched surface is less than the outer diameter of the needle and greater than the inner diameter of the needle; aligning the needle within the singular arched surfaces of the first and second anvils such that a portion of a wall thickness of the needle overlaps the singular arched surfaces and a planar portion of the opposing planar crimping surfaces, the hollow interior of the needle being confined within the singular arched surfaces; and crimping an outer surface of the needle between the planar portions of the opposing planar crimping surfaces such that a sheared portion of the outer surface is displaced outwardly into a gap between the planar portion of the opposing planar crimping surfaces.