in the form of spools or bobbins

Full Title

Hair-curling or hair-waving appliances (heated curling-tongs, curling-irons A45D1/00 ) > Hair winders or hair curlers for use substantially perpendicular to the scalp, i.e. steep-curlers (A45D6/14, A45D6/16 take precedence; with incorporated heating or drying means A45D2/36; heating devices designed for use external to and in connection with, hair curlers or hair wavers A45D4/02) > in the form of spools or bobbins