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Publication of FR1107739ApublicationCriticalpatent/FR1107739A/fr
B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
B21K—MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
B21K1/00—Making machine elements
B21K1/44—Making machine elements bolts, studs, or the like
B21K1/46—Making machine elements bolts, studs, or the like with heads
B21K1/463—Making machine elements bolts, studs, or the like with heads with recessed heads
B—PERFORMING OPERATIONS; TRANSPORTING
B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
B21G—MAKING NEEDLES, PINS OR NAILS OF METAL
B21G3/00—Making pins, nails, or the like
B21G3/32—Feeding material to be worked to nail or pin making machines
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FR1107739D1954-06-281954-06-28Procédé de fabrication de vis à têtes munies d'empreintes creuses et machines pour la mise en oeuvre de ce procédé
ExpiredFR1107739A
(fr)