Needle cartridge

Claim 1

A needle cartridge assembly for a surgical operating pen or tatooing instrument, comprising (a) elongated cylindrical tube means; (b) an upper end cap means generally closing the top end of said tube means; (c) adapter means associated with said upper end cap means for mounting said needle cartridge within an operating instrument; said adapter means including an orific for air flow; (d) a lower plug means closing the bottom end of said tube means and forming a pigment reservoir; (e) liquid pigment filling said reservoir; (f) a thin cylindrical discharge tube passing through said lower plug means; (g) a tri-needle assembly comprising elongated tatooing needles supported in and projecting outwardly from said discharge tube; (h) a steel ball adapted to be seated in a first mode upon the upper end of said discharge tube to prevent flow of pigment from said reservoir to said needle assemble and adapted to be displaced and moved within said reservoir in a second operating mode; (i) a portion of said delivery tube proximate to its bottom end being crimped about and into contact with the outer surfaces of said needles thereby retaining said needles in intimate contiguous contact and cooperating therewith to define four discrete passages for pigment flow.