Paper web handling apparatus having improved air bar with dimens

Details Paper web handling apparatus having improved air bar with dimens Paper web handling apparatus having improved air bar with dimens

1987-06-11

1988-11-22

Levy, Stuart S.

Advancing material of indeterminate length

By fluid current

And web storage

34160, B65H 2014, F26B 1320

Patent

active

047859865

ABSTRACT:
Apparatus for drying a running paper web and floatingly suspending it without contact during the drying process, including air bars which are considerably larger than conventional air bars, for example, being about five and one-fourth inches square in cross-section, and being about three and one-half inches between their nozzle slots. These large air bars are spaced apart from one another along each side of the web a distance of about 15 inches. By so dimensioning the air bars providing the greater spacing between the air bars, considerably more drying capacity is provided, on the order of 14 percent, and requiring less energy input into the dryer. Web drying equipment for sealingly mounting the air bars on the air supply duct means so that the bars can be individually adjusted toward and away from the web can also be tilted or pivoted to change the angle of the drying air being discharged against the web. An air distributing member defining an air distributing chamber within said bar having a pair of opposed and inclined side walls, and having a plurality of small holes therethrough to provide fine scale air turbulence for air passing through said holes to said slot nozzles. The distributing member also has a perforated inner plate spaced inwardly from said outer wall and through which pressurized air passes from the interior of said bar, including guide means for slidably supporting said perforated plate on the air distributing member.

REFERENCES:
patent: 3448907 (1969-10-01), Otepka et al.
patent: 3964656 (1976-06-01), Hella
patent: 4265384 (1981-05-01), Daane

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