B - Operations – Transporting – 29 – C
Patent
B - Operations, Transporting
29
C
18/521
B29C 49/04 (2006.01)
Patent
CA 1190364
Abstract of the Disclosure A guide assembly for blown plastic tubes to guide and support the tube after its extrusion from a die consists of a frame carrying a plurality of pairs of vertically-extending members distributed circumferentially around the tube. Each of the vertically-extending members carries a plurality of vertically- spaced parallel radially-inwardly-extending arms. Each arm of one vertical member of the pair cooperates with a respective arm of the other member of the pair, each cooperating pair of arms having a flexible wire support member extending between these ends, the wire engaging the tube and conforming to its circumference. As the tube diameter decreases the arms are moved simultaneously radially inward by opposite rotation of the respective vertical members, whereupon the wire conforms to the new reduced diameter, and vice-versa. The actual contact of the support member with the tube is by side-by-side cylindrical rollers (e.g. of nylon) threaded on the wire. An additional support means may be provided that engages the centre of the guide wire and, in addition to preventing downward sagging, automatically presses it radially inward with an increasing force as the tube diameter is decreased.
422485
Hirons & Rogers
Macro Engineering Company Ltd.
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