Document Type and Number:
Japanese Patent JPS577806
Kind Code:
B2
Abstract:
The invention concerns a machine for the continuous manufacture of corrugated filter structures out of a thin strip. On the two sides of the thin strip, by means of marking lines, a series of impressions are marked for the purpose of beginning the formation of longitudinal folded ribs, the strip thus marked being pushed through a passage having an evolving shape and longitudinal ribs, for the purpose of compressing the strip transversely as well as longitudinally, and the folded structure coming out of such passage being cut at will.
Application Number:
JP5138476A
Publication Date:
February 13, 1982
Filing Date:
May 07, 1976
Export Citation:
International Classes:
B21D5/16; B21D13/04; B31F1/12