Patent ID: 8795806

Claim:
A folded honeycomb, formed from a plurality of cells arranged in rows, comprising: cells comprising two 3D-structures forming cell halves, the cell halves adjoining each other in the longitudinal direction of each cell to form lateral cell walls which adjoin one another in the cross-sectional form of a ring and, the cells being bounded toward first and second opening sides of each cell by covering-layer planes whereby the cells are each bridged completely in one or other of the covering-layer planes; the 3D-structures are formed by plastic deformation from uncut flat body along with connecting areas produced by plastic deformation, the 3D-structures being folded together to form the lateral walls, the connecting areas closing the cells at the first and second opening sides of the cells, the connecting areas being located in one or other of the covering-layer planes in the folded honeycomb, and connecting in one of said covering-layer planes the two cell halves of a cell and in the other covering-layer plane adjacent cell halves of two neighboring cells, each cell has an opening defined by the lateral cell walls covered by a first covering-layer; each cell has a bottom area defined by the lateral cell walls and covered by a second covering-layer; each cell is surrounded by four adjacent cells having openings covered by the second covering-layer opposite the first covering-layer, all cells extending between the two covering-layers; the honeycomb, in each covering-layer plane, has alternate rows of openings and bottom areas, the folded honeycomb being a lightweight sandwich panel after lamination or direct extrusion of the covering layers on both sides of the honeycomb core.