WebCPC CPC COOPERATIVE PATENT CLASSIFICATION

B21G　MAKING NEEDLES, PINS OR NAILS

B21G 1/00 Making needles used for performing operations (forming heads on pin-like needles B21G 3/12; making U-shaped hairpins B21G 7/04)

B21G 1/003 ・{Needles for special purposes, e.g. knitting, crochet, hat-pins}

B21G 1/006 ・{Special treatments of pins or needles, e.g. annealing, straightening}

B21G 1/02 ・of needles with eyes, e.g. sewing-needles, sewing-awls

B21G 1/04 ・・of needles specially adapted for use in machines or tools

B21G 1/06 ・of needles with hook or barb, e.g. crochet hooks

B21G 1/08 ・of hollow needles or needles with hollow end, e.g. hypodermic needles, larding-needles (B21G 1/10 takes precedence)

B21G 1/10 ・equipped with locking means for the material to be drawn through, e.g. for repairing tubeless tyres

B21G 1/12 ・Securing, cleaning-off burrs, reconditioning polishing, grinding (takes precedence over B21G 1/02 to B21G 1/10)

B21G 3/00 Making pins, nails, or the like (of pins with individual caps B21G 5/00; of U-like shape B21G 7/00; of split-pins B21G 7/08)

B21G 3/005 ・{Nails or pins for special purposes, e.g. curtain pins}

B21G 3/02 ・of pins of the kind used in the tailoring trade or the house- hold

B21G 3/04 ・・with locking or shielding device for the pin point, e.g. safety-pins

B21G 3/06 ・of nails with shoulders

B21G 3/08 ・of nails with head and two or more shanks or split shanks

B21G 3/10 ・of undulated nails or pins

B21G 3/12 ・Upsetting; Forming heads

B21G 3/14 ・Reducing diameter of parts otherwise than by rolling

B21G 3/16 ・Pointing; with or without cutting

B21G 3/18 ・by operations not restricted to one of the groups B21G 3/12 to B21G 3/16(B21G 3/06 to B21G 3/10 take precedence)

B21G 3/20 ・・from wire of indefinite length (by rolling B21G 3/30)

B21G 3/22 ・・・in pairs arranged head to head

B21G 3/24 ・・・by simultaneously forming the head of one nail and the adjacent point of another

B21G 3/26 ・・by cutting from strip or sheet material

B21G 3/28 ・・by forging or pressing

B21G 3/30 ・・by rolling

B21G 3/32 ・Feeding material to be worked to nail or pin making machines

B21G 5/00 Making pins or nails with attached caps or with coated heads

B21G 5/02 ・of drawing-pins or pins of drawing-pin type

B21G 7/00 Making pins of U-like shape or split-pins (of paper fasteners or staples B21D 53/46, B21F 45/16)

B21G 7/02 ・of U-like shape

B21G 7/04 ・・of hairpins

B21G 7/06 ・・・of undulated hairpins

B21G 7/08 ・of split-pins, e.g. cotter-pins