Tubular core assemblies for rolls of paper or other sheet material
First Claim
1. A tubular core assembly for a roll of paper or other sheet material comprising:
- a hollow cylindrical core member formed of paperboard material, andan 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, andeach 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.
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Accused Products
Abstract
A tubular core assembly for a roll of paper or other sheet material has a hollow cylindrical core member formed of paperboard material, and an annular end member of metal or plastic material within each opposite end portion of the core member. Each end member has 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 also has a pair of radially-projecting lugs at diametrically opposite positions at the respective end of the tubular core assembly, the core member has a pair of lug-receiving notches at diametrically opposite positions at each end receiving the 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 further has 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 the pair of lugs.
76 Citations
15 Claims
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1. A tubular core assembly for a roll of paper or other sheet material comprising:
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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. - View Dependent Claims (2, 3, 4, 5)
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6. An annular end member of metal or plastic material for insertion in to an end portion of a hollow cylindrical core member of a tubular core assembly for a roll of paper or other sheet material,
said end member having an outer annular surface securable to an inner annular surface of a core member and an inner annular surface shaped to receive a roll supporting chuck, a pair of radially-projecting lugs at diametrically opposite positions adjacent an end thereof engageable in lug-receiving notches in the core member, a pair of notches at diametrically opposite positions extending inwardly from said end for receiving a projection of a roll supporting chuck, said projection receiving notches being located circumferentially midway between said pair of lugs, and a further pair of projection receiving notches extending inwardly from said ends said further pair of projection-receiving notches being located immediately radially inwardly of a respective lug.
Specification