Patent ID: 6923582

Claim:
A spindle-mountable core for supporting a roll of web material, comprising: a tubular body having an outer surface for receiving and supporting a length of web material wound thereupon, and having a generally cylindrical inner surface defining a bore through said body for receiving a spindle inserted thereinto from one end, a major portion of said bore having a first diameter; a plurality of circumferentially spaced ribs extending axially along said bore and radially inwardly from said inner surface of said body, said ribs being constructed for slidable engagement with corresponding groove structure formed into the outer surface of a mounting spindle; stop means on said core for engaging a spindle inserted into said bore through said body from said one end so as to limit the depth of insertion of the spindle and thereby define a fully mounted position of said core thereon; and collar structure on said inner surface of said body effectively circumscribing said bore and having a contact surface with an effective inside diameter smaller than said first diameter, said collar structure being disposed near the end of said bore opposite to said one end and presenting said contact surface thereof for frictional engagement with circumferential contact means on a spindle in said fully mounted position of said core thereon.