EP 0020829 A1 19810107 - Production of load bearing panels.
Title (en)
Production of load bearing panels.
Title (de)
Herstellung von tragenden Platten.
Title (fr)
Fabrication de panneaux portants.
Publication
Application
Priority
EP 79301192 A 19790620
Abstract (en)
A load bearing panel is made from a top sheet (38 min ) and a stiffening web (39) which is made by giving a flat sheet a plurality of projections (15) to make it more rigid for which purpose the flat sheet is deformed by cold die forming using circular or nearly circular dies and circular, domed punches so as to form domed projections in the sheet, the arrangement of dies and punches being such that no straight line can be drawn across the region of the circular dies without intersecting at least two of them.
IPC 1-7
IPC 8 full level
CPC (source: EP)
E04C 2/08 (2013.01); E04C 2/326 (2013.01)
Citation (search report)
- US 3525663 A 19700825 - HALE JESSE R
- BE 683142 A 19661227
- US 3196763 A 19650727 - RUSHTON FREDERICK N
- US 4077247 A 19780307 - STEWART DENNIS C
- DE 1103550 B 19610330 - ERBEN DES VERSTORBENEN DR ING
Designated contracting state (EPC)
AT BE CH DE FR GB IT LU NL SE
DOCDB simple family (publication)
EP 0020829 A1 19810107; EP 0020829 B1 19830914; AT E4654 T1 19830915; DE 2966156 D1 19831020
DOCDB simple family (application)
EP 79301192 A 19790620; AT 79301192 T 19790620; DE 2966156 T 19790620