Pressure-sensitive adhesive tape roll and core therefor

Claim 1

A COMPOSITE RIMLESS CORE FOR A ROLL OF NORMALLY TACKY AND PRESSURE-SENSITIVE ADHESIVE TAPE COMPRISING TWO CONCENTRIC OUTER END INNER ANNULAR CORE MEMBERS OF EQUAL WIDTH IN SLIDABLE CONTACT WITH EACH OTHER AND SEPARABLY ROTATABLE IN EITHER CLOCKWISE OR COUNTERCLOCKWISE DIRECTION, THE INNER ANNULAR MEMBER HAVING A SPLIT-RING PORTION DEFINING A GAP, AND SHEET MATERIAL ADHERED TO THE SPLITRING PORTION OF THE INNER ANNULAR MEMBER SO AS TO SPAN AND COMPLETELY COVER SAID GAP, WHEREBY SAID CORE EITHER MAY BE MOUNTED ON A CONVENTIONAL DISPENSER SO THAT THE TWO ANNULAR MEMBERS FUNCTION AS A UNIT TO ROTATE ABOUT THE AXIS OF THE DISPENSER DRUM OR, AFTER FORCING THE SEPARATED ENDS OF THE SPLIT-RING PORTION OF THE INNER ANNULAR MEMBER TOGETHER, MAY BE FIRMLY HELD IN THE HAND OF AN OPERATOR SO THAT THE INNER ANNULAR MEMBER REMAINS STATIONARY WHILE THE WITHDRAWAL OF TAPE WOUND CONVOLUTELY UPON ITSELF ABOUT SAID CORE CAUSES THE OUTER ANNULAR MEMBER TO ROTATE ABOUT SAID INNER ANNULAR MEMBER.