| 摘要 |
<p>1512140 Fibre distribution in web formers CROWN ZELLERBACH CORP 29 Nov 1976 [24 Dec 1975] 49704/76 Heading DIN A device 14 for distributing fibres in the production of fibre webs comprises a duct in which front and rear walls converge from an inlet 60 to an outlet 62 while side walls 54, 56 diverge linearly, the front and rear walls being convexly curved in the direction shown to give a cross section area which does not deviate by more than 20%. The inlet of the duct is circular while the exit has two long parallel sides with curved or linear ends. Vanes 80 can be provided to be selectively positioned in a slot 82 in order to adjust the fibre distribution across the duct by means of their wakes. Gas entrained fibres are projected into the distributor 14 from a conduit 10 which is spaced from the distributor to entrain air. The distributor leads the fibres on to a foraminous collecting belt 16 below which a suction box 20 is located. Two examples are given with details of how the dimensions of the duct are derived to maintain a substantially constant cross section. Specification 1406650 is referred to regarding the source of fibre material.</p> |
