Tubular core assemblies for rolls of paper or other sheet material

A tubular core assembly for a roll of paper or other sheet material comprising:

• a hollow cylindrical core member formed of paperboard material, and
• an annular end member or plastic material with each opposite end portion of the core member, each end member having an outer annular surface secured to the inner annular surface of the core member and an inner annular surface shaped to receive a roll supporting chuck,
• each end member having a pair of radially-projecting lugs at diametrically opposite positions at the respective end of the tubular core assembly, said core member having a pair of lug-receiving notches at diametrically opposite positions at each end receiving said lugs of the respective end member to facilitate transmission of torque and axial chuck pressure from the end member to the core member,
• each end member having a pair of notches at diametrically opposite positions extending inwardly from the respective end of the tubular core assembly for receiving a projection of a roll supporting chuck, each projection-receiving notch being located circumferentially mid-way between said pair of lugs, and
• each end member having a further pair of projection-receiving notches, said further pair of projection-receiving notches extending inwardly from the respective end of tubular core assembly immediately radially inwardly of a respective lug.