Patent ID: 7111550

Claim:
An apparatus configured for sequentially numbering pieces produced by injection, comprising: a push rod configured to be pushed mechanically by an ejection plate or other mechanical mechanism of an injection mold in each process of injection of a piece; a series of parallel wheels; a series of digits, legends, figures or symbols, situated on a perimeter of the series of parallel wheels that correspond to units, tens and other powers of ten or other base unit systems for numerically marking a produced piece; a link configured to slide in a linear direction under action of the push rod; a central cylinder that is attached to the link and is configured to turn inside the wheels provided with inner toothing defined by recesses and projections; a comb configured to exert pressure on the projections formed of the teeth, the comb passing through and protruding externally from an opening in the central cylinder in order to change a position of at least one of the wheels in a direction of forward movement of the central cylinder and therefore of a digit displayed; and magnets matching up with the outer face of the wheel configured to assist in securing a position of the comb, thereby preventing a rotation of the at least one of the wheels while the central cylinder slides back.