Patent ID: 8835016
Filing Date: 2014-09-16
Classification: B32B,C22C,Y10T

Abstract:
1. A sandwich structure comprising: a core layer including truncated peaks and truncated valleys, and substantially flat and peripherally circular lands located at external surfaces of the peaks and valleys, with curved intersections between the peaks and side walls extending between the peaks and valleys; a substantially flat outer layer attached to at least some of the adjacent lands on the external surfaces on one side of the core layer; another substantially flat outer layer attached to at least some of the adjacent lands on the external surfaces on an opposite side of the core layer; raised ribs of the core layer bridging between adjacent of the peaks in a first direction and abrupt depressions located between adjacent of the peaks in a second direction substantially perpendicular to the first direction; the side walls having a substantially circular cross-sectional shape where they intersect the raised ribs; and the peaks and valleys being formed in the core layer by embossing rolls to prevent core fracture during forming.