The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 15, 2015
Filed:
Feb. 04, 2008
David E. Rhodes, Hartsville, SC (US);
John F. Auten, Hartsville, CA (US);
Yiming Wang, Middleton, WI (US);
Wim Van DE Camp, Hartsville, SC (US);
Terry Gerhardt, Hartsville, SC (US);
Lawrence E. Renck, Hartsville, SC (US);
David E. Rhodes, Hartsville, SC (US);
John F. Auten, Hartsville, CA (US);
Yiming Wang, Middleton, WI (US);
Wim Van de Camp, Hartsville, SC (US);
Terry Gerhardt, Hartsville, SC (US);
Lawrence E. Renck, Hartsville, SC (US);
Sonoco Development, Inc., Hartsville, SC (US);
Abstract
Winding cores for elastically stretched or shrinkable materials are designed to significantly reduce the amount of roll strain energy developed during winding. This is accomplished by building into the core an energy-absorbing zone that can be collapsed by a substantial amount and in a relatively controlled fashion over a substantial period of time under the influence of a continued radially inward pressure exerted by the roll of wound material. The energy-absorbing zone is formed by one or more collapsible layers having repeated atomic regions projecting out of a plane of the sheet and each defining a plurality of normal vectors in different sub-regions of the atomic region, wherein the normal vectors, when projected onto the two-dimensional plane of the sheet, are in a plurality of different directions in the plane.