Control syringe

DETAILED DESCRIPTION In accordance with the instant invention, there is provided a control syringe barrel which includes a substantially cylindrical body, a pair of horizontal flanges extending from the top of the cylindrical body, each of the horizontal flanges having an aperture therein adjacent the cylindrical body, and a pair of substantially horizontal flanges extending from the cylindrical body and located below the apertures in the horizontal flanges, and wherein the sides of the apertures are substantially the same shape as the sides of the substantially horizontal flanges.
In accordance with the instant invention, there is also provided apparatus for forming a control syringe barrel having a pair of upper and lower flanges.
The apparatus includes a mold cavity for forming most of the outer surface of the syringe barrel, and an integral core pin having a cylindrical core section for forming the inner surface of the syringe barrel and a pair of vertically extending ribs spaced from said cylindrical core section for forming the top surface of the lower flanges and the outer surface of the syringe barrel directly above the lower flanges.
The vertically extending ribs also form an aperture in each of the upper flanges.