EP 0307062 A3 19890920 - AUTOMATIC FRAME BENDING MACHINE FOR BENDING STEEL RODS OR STRIPS, AND METHOD AND APPARATUS FOR MAKING SPRING CORES FOR MATTRESSES OR UPHOLSTERED FURNITURE
Title (en)
AUTOMATIC FRAME BENDING MACHINE FOR BENDING STEEL RODS OR STRIPS, AND METHOD AND APPARATUS FOR MAKING SPRING CORES FOR MATTRESSES OR UPHOLSTERED FURNITURE
Publication
Application
Priority
GR 870101408 A 19870909
Abstract (en)
[origin: WO8902323A2] An automatic frame bending machine is disclosed for bending off rod steel or steel bands, and a process and device for producing spring mattresses. The purpose of the invention is to design a frame bending machine with which frames of the most diverses types can be automatically produced without risk of material losses or of deforming the frames. The frame bending machine should also be easy to integrate in an assembly line. For this purpose, a spool is provided, after which the steel passes through a wire straightener composed of a rotor and rollers, measurement and traction rollers linked to the bending device, cutting means and a centering metal sheet. Hydraulic motors controlled by a microprocessor from a control panel are provided for driving and bending.
IPC 1-7
IPC 8 full level
B21D 7/022 (2006.01); B21D 7/024 (2006.01); B21F 1/00 (2006.01); B21F 33/02 (2006.01); B23P 19/04 (2006.01)
CPC (source: EP US)
B21D 7/022 (2013.01 - EP US); B21F 1/00 (2013.01 - EP US); B21F 33/02 (2013.01 - EP US); B21F 33/025 (2013.01 - EP US); Y10T 29/48 (2015.01 - EP US); Y10T 29/481 (2015.01 - EP US); Y10T 29/53313 (2015.01 - EP US); Y10T 29/53383 (2015.01 - EP US)
Citation (search report)
- US 4280350 A 19810728 - KING JAMES F, et al
- FR 2472523 A1 19810703 - ISHIHARA MASAMITSU [JP]
- EP 0032656 A2 19810729 - EVG ENTWICKLUNG VERWERT GES [AT]
- US 4590779 A 19860527 - STANGE RONALD R [US], et al
- US 4161110 A 19790717 - JAHRBACHER GERT [AT], et al
- FR 2553314 A1 19850419 - PIEGATRICI MACCH ELETTR [IT]
- EP 0198984 A2 19861029 - SHINSEI INDUSTRIES CO [JP]
- DE 2723846 A1 19771215 - HUFNAGL & CO RISTA DRAHT
Designated contracting state (EPC)
ES
DOCDB simple family (publication)
EP 0307062 A2 19890315; EP 0307062 A3 19890920; CA 1332805 C 19941101; DE 3851342 D1 19941006; EP 0343199 A1 19891129; EP 0482674 A2 19920429; EP 0482674 A3 19920603; EP 0482674 B1 19940831; GR 871408 B 19870917; JP H02501205 A 19900426; JP H0669593 B2 19940907; MX 170669 B 19930803; US 5054178 A 19911008; WO 8902323 A2 19890323; WO 8902323 A3 19890518
DOCDB simple family (application)
EP 88202057 A 19880907; CA 576225 A 19880831; DE 3851342 T 19880907; EP 8800811 W 19880907; EP 88908188 A 19880907; EP 91121406 A 19880907; GR 870101408 A 19870909; JP 50757688 A 19880907; MX 1296288 A 19880908; US 35974889 A 19890508