Strip of flexible corrugated material

Details Strip of flexible corrugated material Strip of flexible corrugated material

B - Operations, Transporting

21

D

113/52

B21D 51/16 (2006.01) B21C 37/12 (2006.01) F16L 11/16 (2006.01)

Patent

CA 1220094

ABSTRACT IMPROVED STRIP OF FLEXIBLE CORRUGATED MATERIAL A strip of very thin flexible material has continuous longitudinal corrugations in the form of curved ridges and hollows, and may be curled helically to form a flexible tube. The strip has a first marginal ridge with a radius of curvature smaller than that of all other ridges, and a second marginal ridge with a radius of curvature larger than that of all other ridges. As the strip is curled with the first marginal ridge overlying a first intermediate ridge and the second marginal ridge underlying a second intermediate ridge, the marginal ridges are respectively spread over and closed under the intermediate ridges to conform to the curvature thereof.

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