EP 1015151 A1 20000705 - METHOD AND APPARATUS FOR MANUFACTURING COIL SPRINGS
Title (en)
METHOD AND APPARATUS FOR MANUFACTURING COIL SPRINGS
Title (de)
VERFAHREN UND VORRICHTUNG ZUR HERSTELLUNG VON SPIRALFEDERN
Title (fr)
PROCEDE ET APPAREIL PERMETTANT DE FABRIQUER DES RESSORTS A BOUDIN
Publication
Application
Priority
- US 9811355 W 19980529
- US 86812097 A 19970530
Abstract (en)
[origin: WO9853933A1] A method and apparatus for forming a length of connected, pocketed coil springs to be used in mattresses and the like where wire (10) from a supply source is heated (16) to between 450 and 500 degrees Fahrenheit by an induction heater before the wire is coiled. Thereafter, the wire is hot coiled (18), severed (20) and cooled (22) below a temperature where a permanent set might occur fromfurther processing of the spring. Thereafter, the spring is compressed (24) in preparation for its insertion (26) into a space provided by stretchable fabric from a supply reel. The fabric (12) is folded (14) on itself to provide the space. The temperature of the spring must also be sufficiently low to contact the fabric without causing burns or other damage. After insertion of a compressed spring into the space, the fabric is ultrasonically welded (28) to create individual but connected pockets for each spring. Thereafter, the springs are oriented (30) to allow each spring to expand thereby creating the length of connected, pocketed coil springs.
IPC 1-7
IPC 8 full level
B21F 33/04 (2006.01); B21F 35/00 (2006.01); C21D 9/02 (2006.01); B21F 27/16 (2006.01)
CPC (source: EP)
B21F 33/04 (2013.01); C21D 9/02 (2013.01)
Designated contracting state (EPC)
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE
DOCDB simple family (publication)
WO 9853933 A1 19981203; AR 012893 A1 20001122; AU 7810498 A 19981230; BR 9809886 A 20000627; CA 2291822 A1 19981203; CN 1264327 A 20000823; CO 4870768 A1 19991227; EP 1015151 A1 20000705; HU P0003166 A2 20010228; HU P0003166 A3 20010328; IL 133186 A0 20010319; JP 2000512914 A 20001003; PE 43399 A1 19990506; PL 337209 A1 20000814; SK 161399 A3 20000814; TW 407074 B 20001001; ZA 984692 B 19990104
DOCDB simple family (application)
US 9811355 W 19980529; AR P980102549 A 19980601; AU 7810498 A 19980529; BR 9809886 A 19980529; CA 2291822 A 19980529; CN 98807404 A 19980529; CO 98030700 A 19980601; EP 98926211 A 19980529; HU P0003166 A 19980529; IL 13318698 A 19980529; JP 50103599 A 19980529; PE 00044298 A 19980601; PL 33720998 A 19980529; SK 161399 A 19980529; TW 87108577 A 19980616; ZA 984692 A 19980601