Marking device

Claim 1

A MARKING DEVICE OF THE TYPE DESCRIBED COMPRISING A ONE-PIECE EXTRUDED, SEAMLESS METAL CONTAINER INITIALLY EXTRUDED TO PROVIDE A BODY HAVING A GENERALLY CYLINDRICAL SEAMLESS SIDEWALL AND A SEAMLESS BOTTOM WALL UNITARY WITH AND HAVING A SEAMLESS JUNCTION WITH SAID SIDE WALL, A QUANTITY OF ABSORBENT MATERIAL FOR CONTAINING MARKING FLUID ASSEMBLED WITHIN SAID BODY, AN END SECTION OF SAID BODY SUBSEQUENTLY BEING REDUCED IN DIAMETER FOR RETAINING SAID ABSORBENT MATERIAL AND PROVIDING AN ELONGATED SEAMLESS NECK PORTION HAVING A PREDETERMINED CROSS SECTION AND A REDUCED INTERNAL DIAMETER, AN ELONGATED SELFSUPPORTING WICK HAVING A CROSS SECTION DIFFERENT FROM SAID PREDETERMINED CROSS SECTION AND INCLUDING A MAJOR TRANSVERSE DIMENSION SUBSTANTIALLY THE SAME AS THE INTERNAL DIAMETER OF SAID REDUCED NECK PORTION, SAID WICK EXTENDING THROUGH SAID NECK PORTION WITH AN INNER END CONTACTING THE ABSORBENT MATERIAL AND AN OUTER END EXPOSED BEYOND THE END OF THE NECK PORTION AND CONSTITUTING A MARKING ELEMENT, SAID NECK PORTION INCLUDING AN INTEGRAL INWARDLY EXTENDING PROJECTION ENGAGING A CIRCUMFERENTIALLY LIMITED AREA OF A SIDE OF THE INSERTED WICK FOR POSITIONING THE SAME IN SAID NECK PORTION, SAID NECK PORTION BEING SPACED FROM SIDE PORTIONS OF SAID WICK OFFSET CIRCUMFERENTIALLY OF SAID AREA FOR PROVIDING AN AIR PASSAGEWAY BETWEEN THE WICK AND THE NECK PORTION, AND A CAP MEMBER REMOVABLY ASSEMBLED WITH AND SEALING ENGAGING SAID NECK PORTION.