EP 0228350 A3 19880127 - ITEMS COMPOSED OF A STEEL FRAME WITH STEEL SPRINGS, BEHAVING AS ELASTIC SUPPORT, FOR THE MANUFACTURING OF MATTRESSES AND CUSHIONS
Title (en)
ITEMS COMPOSED OF A STEEL FRAME WITH STEEL SPRINGS, BEHAVING AS ELASTIC SUPPORT, FOR THE MANUFACTURING OF MATTRESSES AND CUSHIONS
Publication
Application
Priority
IT 4044385 A 19851230
Abstract (en)
[origin: EP0228350A2] Items composed of a steel frame 1 with steel springs 2, behaving as elastic support, for manufacturing of mattresses and cushions with the peculiarity that the frame and the springs are completely embedded in a flexible polyurethane foam 3. The polymeric resin is polymerized and foamed directly in the structure placed in a special mould under controlled process conditions in order to obtain a polymeric foam with desired apparent density in relation to the applications. Eventually external coverings 4 in natural or synthetic material, can be added behaving as cover and/or padding.
IPC 1-7
IPC 8 full level
A47C 27/20 (2006.01)
CPC (source: EP)
A47C 27/15 (2013.01); A47C 27/20 (2013.01)
Citation (search report)
- [X] FR 85189 E 19650625
- [X] US 2994890 A 19610808 - WAGNER WILLIAM T
- [X] FR 2319471 A1 19770225 - PLASSE ROBERT [FR]
- [A] US 2398237 A 19460409 - MAX MARSACK
- [A] US 3393012 A 19680716 - CHANCELLOR JR CHARLES W
- [A] DE 3140340 A1 19830428 - METZELER SCHAUM GMBH [DE]
Designated contracting state (EPC)
AT BE CH DE ES FR LI
DOCDB simple family (publication)
EP 0228350 A2 19870708; EP 0228350 A3 19880127; IT 8540443 A0 19851230
DOCDB simple family (application)
EP 86830337 A 19861110; IT 4044385 A 19851230