EP 0068633 A3 19830720 - METHOD, APPARATUS AND FORMING ROLL FOR FORMING MATERIAL WITH A BIDIRECTIONAL PERIODICITY
Title (en)
METHOD, APPARATUS AND FORMING ROLL FOR FORMING MATERIAL WITH A BIDIRECTIONAL PERIODICITY
Publication
Application
Priority
JP 9300281 A 19810618
Abstract (en)
[origin: EP0068633A2] A sheet material (6) is passed between a pair of forming rolls (7, 8) having working surfaces with forming teeth of a wave-shape which has a periodicity within two mutually perpendicular sections. The rolls are constructed from elements in the form of helical spur gears (3) keyed on a common shaft (5) and may be interspersed with straight spur gears (4). This permits the continuous formation of a structural material having a bidirectional periodicity, that is a material (1) having a wave-form construction within each of two mutually perpendicular sections. The pitch of the wave-form can be altered by changing the depth of action between the rolls. Such bidirectional material can have a structural performance comparabe with that of a honeycomb sandwich material and has many other uses.
IPC 1-7
IPC 8 full level
B21D 13/04 (2006.01)
CPC (source: EP)
B21D 13/04 (2013.01)
Citation (search report)
- US 2290608 A 19420721 - EVANS GEORGE H
- US 2769479 A 19561106 - GETZ ARNSTEAD G
- GB 2033800 A 19800529 - COVRAD LTD
- US 1793629 A 19310224 - MEISELBACH AUGUST D
- US 3525138 A 19700825 - ABBOTT ROY W
Designated contracting state (EPC)
DE FR GB
DOCDB simple family (publication)
EP 0068633 A2 19830105; EP 0068633 A3 19830720; JP S57209725 A 19821223
DOCDB simple family (application)
EP 82302655 A 19820524; JP 9300281 A 19810618