1,189,526. Bobbins. LEESONA CORP. 9 March, 1967 [14 March, 1966], No. 21759/68. Divided out of 1,189,521. Heading B8M. A bobbin, e.g. for a ring frame, has a frustoconical base portion lOb with a notch lOc wider than the diameter of the yarn and effective to catch a yarn and commence winding of it on to the bobbin.