B - Operations – Transporting – 21 – D
Patent
B - Operations, Transporting
21
D
113/52
B21D 51/16 (2006.01)
Patent
CA 1231007
Abstract Disclosed is an apparatus for helically curling longitudinally corrugated thin strip material into a flexible corrugated tube, the apparatus comprising, in combination a base, an upright support which is mounted on the base and two driven output rollers, the output rollers having intermeshing arcuate lands and grooves forming a nip which matches the corrugations of a strip of material to be helically curled so as to drive the strip. A spider is carried on the upright support in cooperative relationship to the two driven output rollers. Idler rollers are mounted on the spider which have arcuate lands and grooves to receive the strip of material from the output rollers and guide the strip in a helical path in which each successive turn of the strip passes through the nip of the output rollers in partially overlapped relationship with the strip entering the output rollers, the idler rollers being journalled on spindles all of which are equidistant from the longitudinal axis of a tube formed by the curling of the strip. Spindle adjusting means is provided for moving the spindles radially and retaining them in predetermined radially equidistant positions from the longitudinal axis and spider adjusting means is provided for moving the spider vertically on the upright support to change the distance between the output roller nip and the longitudinal axis, the spindle adjusting means and the spider adjusting means permitting the apparatus to form tubes of different diameters. Finally, locking means are provided for intermittently crimping overlapping parts of the strip to lock the parts to one another.
533376
Meredith & Finlayson
Security Lumber & Supply Co.
LandOfFree
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