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An adjustable core pin for molding vials for use in levels and those vials molded using the adjustable core pin are disclose. The core pin includes an elongate rod with a crest at its cross section with the greatest diameter and a rod retainer with a cavity which receives the rod such that the dista

An adjustable core pin for molding vials for use in levels and those vials molded using the adjustable core pin are disclose. The core pin includes an elongate rod with a crest at its cross section with the greatest diameter and a rod retainer with a cavity which receives the rod such that the distal end of the rod projects from a rod retainer distal opening, the rod being adjustable in relation to the rod retainer so that the crest can be adjustably placed at a preferred position in a molding cavity for vial molding.

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1. An adjustable core pin for molding vials for use in levels, the core pin comprising:an elongate rod having a distal end, said distal end including a crest at a cross section of the elongate rod with the greatest diameter; and a rod retainer having distal and proximal openings and an elongate rod-

1. An adjustable core pin for molding vials for use in levels, the core pin comprising:an elongate rod having a distal end, said distal end including a crest at a cross section of the elongate rod with the greatest diameter; and a rod retainer having distal and proximal openings and an elongate rod-retainer cavity extended from the distal opening to the proximal opening, the rod-retainer cavity receiving the rod such that the distal end projects from the distal opening for a determinable length, whereby the determinable length is adjustable so that the crest is placed at a preferred position in a molding cavity for vial molding.2. The adjustable core pin of claim 1 further comprising:a stripper bushing having first and second ends, a stripper-bushing cavity extending from the first end to the second end, and a stripper surface on the second end, the stripper-bushing cavity receiving the rod retainer such that when the stripper bushing and rod retainer are engaged the stripper surface is adjacent to the distal end of the elongate rod, the stripper bushing being movable from the engaged position toward the distal portion of the rod such that the stripper surface contacts any vial molded on the distal portion and ejects the vial from the rod. 3. The adjustable core pin of claim 2 wherein:the rod retainer comprises two integral sections, a proximal section having a outer cylindrical shape and a distal section having an outer conical shape, the distal section having a smaller outer diameter than the proximal section at the junction between the distal and proximal sections thereby forming a stripper shoulder, and the stripper-bushing cavity has a conical shape corresponding to the outer conical shape of the distal section of the rod retainer; whereby the stripper bushing rests on the distal section of the rod retainer when the stripper-bushing cavity receives the rod retainer.4. The adjustable core pin of claim 3 wherein the first end of the stripper bushing rests on the stripper shoulder of the rod retainer when the stripper-bushing cavity receives the rod retainer.5. The adjustable core pin of claim 1 wherein:the elongate rod has a proximal end, intermediate and proximal portions with cross sections, the intermediate portion having a smaller diameter than the proximal portion such that the rod has a shoulder at the junction of the proximal and intermediate portions; and the rod-retainer cavity of the rod retainer has first and second segments with the first segment having a first diameter substantially equal to the diameter of the proximal portion and the second segment having a second diameter substantially equal to the diameter of the intermediate portion such that the rod-retainer cavity has an inner shoulder at the junction of the first and second segments, whereby the crest is placed at a preferred position in the molding cavity by the adjustment insertion of shims between the shoulder and the inner shoulder or machining.6. The adjustable core pin of claim 1 wherein:the elongate rod has a proximal end, intermediate and proximal portions with cross sections, the intermediate portion having a smaller diameter than the proximal portion such that the rod has a shoulder at the junction of the proximal and intermediate portions, the proximal portion having a proximal surface; and the rod-retainer cavity of the rod retainer has first and second segments with the first segment having a first diameter substantially equal to the diameter of the proximal portion and the second segment having a second diameter substantially equal to the diameter of the intermediate portion such that the rod-retainer cavity has an inner shoulder at the junction of the first and second segments, whereby the crest is placed at a preferred position in the molding cavity by machining the shoulder or inner shoulder and inserting machinable spacers at the proximal surface to adjust the position of the rod in relation to the rod retainer.7. The adjustable core pin of claim 5 further comprising:a stripper bushing having first and second ends, a stripper-bushing cavity extending from the first end to the second end, and a stripper surface on the second end, the stripper-bushing cavity receiving the rod retainer such that when the stripper bushing and rod retainer are engaged the stripper surface is adjacent to the distal end of the elongate rod, the stripper bushing being movable from the engaged position toward the distal portion of the rod such that the stripper surface contacts any vial molded on the distal portion and ejects the vial from the rod. 8. The adjustable core pin of claim 7 wherein:the rod retainer comprises two integral sections, a proximal section having a outer cylindrical shape and a distal section having an outer conical shape, and the stripper-bushing cavity has a conical shape corresponding to the outer conical shape of the distal section of the rod retainer, so that the conical sections of the stripper bushing and distal section engage one another when the stripper bushing rests on the rod retainer. 9. The adjustable core pin of claim 5 wherein the rod includes a recess located at the proximal end such that the diameter of the rod at the proximal end is less than the diameter of the proximal portion and the rod retainer includes a recess located at the proximal opening such that the diameter of the rod-retainer cavity adjacent to the opening is greater than the first diameter, and further comprising a proximal-end seal retainer having seals and a bore with an inner diameter substantially equal to the diameter of the rod at the proximal end and an outer diameter substantially equal to the diameter of the rod-retainer cavity adjacent to the opening, the seal retainer positioned in the recesses of the rod and rod retainer to allow the seals to prevent fluid from entering the rod-retainer cavity.10. The adjustable core pin of claim 9 wherein the proximal opening of the rod retainer extends beyond the proximal end of the rod.11. The adjustable core pin of claim 1 wherein:the elongate rod has a proximal end, intermediate and proximal portions with cross sections, the intermediate portion being narrower than the proximal portion such that the rod has a shoulder at the junction of the proximal and intermediate portions, the proximal portion being threaded; and the rod-retainer cavity of the rod retainer has first and second segments with the first segment having a shape corresponding to the proximal portion and the second segment having a shape corresponding to the intermediate portion such that the rod-retainer cavity has an inner shoulder at the junction of the first and second segments, the first segment being threaded to receive the threaded proximal portion; whereby the crest is properly positioned for vial molding by rotating the proximal portion with respect to the first segment.12. The adjustable core pin of claim 11 wherein a spring washer is inserted between the shoulder and inner shoulder to provide tension on the threaded engagement and prevent unwanted rotation of the proximal portion with respect to the first segment.13. An adjustable molding assembly for molding vials for use in levels comprising:an elongate rod having a distal end, said distal end including a crest at a cross section of the elongate rod with the greatest diameter; a molding cavity receiving the distal end during molding, and a rod retainer having distal and proximal openings and an elongate rod-retainer cavity extended from the distal opening to the proximal opening, the rod-retainer cavity receiving the rod such that the distal end projects from the distal opening for a determinable length, the determinable length being adjustable so that the crest is placed at a preferred position within the molding cavity during vial molding. 14. The adjustable molding assembly of claim 13 further comprising:a stripper bushing having first and second ends, a stripper-bushing cavity extending from the first end to the second end, and a stripper surface on the second end, the stripper-bushing cavity receiving the rod retainer such that when the stripper bushing and rod retainer are engaged the stripper surface is adjacent to the distal end of the elongate rod, the stripper bushing being movable from the engaged position toward the distal portion of the rod such that the stripper surface contacts any vial molded on the distal portion and ejects the vial from the rod.