D - Textiles – Paper – 21 – F
Patent
D - Textiles, Paper
21
F
D21F 5/04 (2006.01)
Patent
CA 2098946
An apparatus in the dryer section of a papermaking machine for preventing the flutter of a paper web (W) comprises an air blow box (1) located between cylinders (2, 4) within a loop of a support fabric (F) formed by a guide roll (5). The blow box (1) includes a blow chamber (1a), into whose wall opens a nozzle (7) for providing an ejector assembly together with an opposite wall included in the box. The walls build therebetween a flow path (16) directed towards an uncovered section (18) of support fabric (F). An air current discharging from nozzle (7) is delivered through flow path (16) and into a space (20) confined by the un- covered section (18) of support fabric (F) and thereby through the support fabric. The all current creates a vacuum in a space (19) defined between the ejector assembly and a section (17) of support fabric (F) carrying the web (W).
Borden Ladner Gervais Llp
Valmet Paper Machinery Inc.
LandOfFree
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