D - Textiles – Paper – 21 – F
Patent
D - Textiles, Paper
21
F
34/40
D21F 5/18 (2006.01)
Patent
CA 1131012
I. ABSTRACT OF THE DISCLOSURE An air cylinder for supporting a moving web of material during heat treatment, particularly during drying, of such web. The cylinder comprises a plurality of nozzles which axe arranged in a part-circular array around which the moving web passes the nozzles being of the Coanda type wherein the discharged gaseous medium flows over a transversely extended lip surface of the nozzle between the extended surface and. the adjacent surface of a web being treated and is caused to cling to such extended surface by the so-called Coanda effect, In order to support the moving web particularly stably in the radial direction relative to the cylinder, the nozzles are arranged in pairs, with the respective trans- versely extended surfaces of the two nozzles in each pair extending in opposite directions whereby air flowing over these two extended surfaces flows in opposite circumfer- ential directions to respective radially inwardly directed air outlets. Each air outlet commonly serves two nozzles, one from each of two adjacent pairs of nozzles, respect- ively. A plurality of the part-circular arrays of Coanda nozzles can be disposed with adjacent arrays inserted in relation to each other so as to support the materiel web in a circuitous path around such arrays.
321503
Fetherstonhaugh & Co.
Spooner Edmeston Engineering Limited
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