US 11,787,103 B2
Core with improved chuck interaction
Neil Roland Davis, Asheboro, NC (US); John Franklin Auten, Jr., Hartsville, SC (US); Michael Lee Thompson, Matthews, NC (US); Kevin Manly Kelley, Hartsville, SC (US); Xiaokai Niu, Hartsville, SC (US); David E. Rhodes, Hartsville, SC (US); and Michael David Zold, Hartsville, SC (US)
Assigned to Sonoco Development, Inc., Hartsville, SC (US)
Filed by Sonoco Development, Inc., Hartsville, SC (US)
Filed on Feb. 28, 2022, as Appl. No. 17/682,730.
Application 17/682,730 is a continuation of application No. 16/291,112, filed on Mar. 4, 2019, granted, now 11,279,077.
Prior Publication US 2022/0250306 A1, Aug. 11, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. B29C 53/82 (2006.01); B29C 33/38 (2006.01); B65H 75/02 (2006.01); B65H 75/10 (2006.01)
CPC B29C 53/825 (2013.01) [B29C 33/3842 (2013.01); B65H 75/02 (2013.01); B65H 75/10 (2013.01)] 20 Claims
OG exemplary drawing
 
1. An improved core for mounting on one or more core engaging elements, the core adapted for winding and unwinding material thereon, the core being hollow and cylindrical and having an inner surface and an outer surface adapted to accommodate the material, the core having a length and two axially opposed ends with engaging surfaces proximate the opposed ends that are engaged by the engaging elements, wherein the improvement comprises:
a high coefficient of friction (high COF) coating disposed on the inner surface of the core, the high COF coating adapted to increase the coefficient of friction (COF) between the inner surface of the core and the core engaging elements, wherein the high COF coating is applied to less than all of the surface area of the engaging surfaces proximate the opposed ends.