Adjustable marking device for use in mold wall

In combination with a mold for shaping a plastically moldable material and having a mold wall having an inner surface adapted to contact said material, an outer surface, and a stepped bore in said wall extending between and opening at both of said surfaces, a marking device received in said bore and having an end lying generally along said inner surface for marking an article formed by said material in said mold against said inner surface, said marking device comprising:

• an axially elongated cylindrical stepped ring body received in said stepped bore and shaped complementarily thereto, said ring body having a small-diameter annular end terminating at said inner surface and a large-diameter annular end remote from said inner surface and exposable at said outer surface, said ring body having a stepped passage extending axially therethrough with a small passage step opening at said small-diameter end and a large passage step opening at said large-diameter end, said passage steps defining between them an annular shoulder turned away from said small-diameter end and transverse to an axis of said device;
• means for fixing said ring body in said bore with said small-diameter end flush with said inner surface;
• an axially elongated central body of circularly cylindrical cross section rotatably received in said stepped passage and formed with a large-diameter circular collar adapted to abut said shoulder and a cylindrical shank extending from said collar through said small passage step, said shank having an inner end carrying at least one marking formation adjacent said small-diameter end and an outer end exposable at said outer surface, said small-diameter end of said ring body being circular and provided with a plurality of other marking formations selectively cooperating with said formation on said inner end of said shank;
• indexing means for arresting said central body relatively angularly in any of a plurality of respective positions in each of which the formation on said inner end of said shank is angularly aligned with a selected respective one of said formations on said small-diameter end of said ring body to set the marking applied to said article;
• and
• means including a formation on the outer end of said central body and accessible at said outer surface for rotating said central body in said ring body through said positions.