Patent ID: 7134626
Filing Date: 2006-11-14
Classification: B65H

Abstract:
1. A tubular core assembly for a roll of paper or other sheet material having a hollow cylindrical core member formed of paperboard material, said core member having a recess extending axially inwardly from an end thereof and radially outwardly from an inner surface thereof at least partway to an outer surface thereof, said core member recess having opposed side surfaces and a rear surface extending upwardly from said inner surface, and a stand-alone lug of non-isotropic polymeric or cellulosic material in the core member recess, said lug having side surfaces extending from top to bottom and from front to rear of said lug and a rear surface extending from said top to said bottom and from side to side of said lug, said lug side surfaces engaging the side surfaces of the core member recess and said lug rear surface engaging the rear surface of the core member recess, the core member having an outer diameter in the range of from about 3 to about 14 inches and an inner diameter in the range of from about 2 to about 13 inches, the core member recess and the lug each having a circumferential width in the range of from about 0.25 to about 4 inches, an axial length in the range of from about 0.5 to about 4 inches, and a radial thickness in the range of from about 0.25 to about 1 inch, and the lug having at least one radially inner surface flush with the inner surface of the core member adjacent the end thereof, the total circumferential width of the inner surface or surfaces of the lug being at least about 0.2 inches, said lug having a recess for receiving a key on a stub-chuck, said lug recess extending axially inwardly from an end of the lug adjacent said end of the core member, and said lug recess extending radially outwardly from an inner surface of the lug only partway to an outer surface thereof, whereby the lug has a roof portion over the recess.