Compact air bar assembly for contactless web support

Details Compact air bar assembly for contactless web support Compact air bar assembly for contactless web support

F - Mech Eng,Light,Heat,Weapons

26

B

34/7

F26B 13/20 (2006.01) B65G 51/03 (2006.01) B65H 23/24 (2006.01)

Patent

CA 1181235

Abstract of the Disclosure An assembly of air bars from which air is blown against a length- wise moving web to contactlessly confine it to a plane comprises a header having a ported wall extending along its full length, parallel to said plane. Each of a series of outlet ports along the ported wall opens into an air bar intermediate its ends. A centrifugal blower has its cylindrical rotor near a rear end of the header, spaced to the side of said ported wall remote from the plane. An internal plenum chamber in the header opens to the outlet ports in the rear one-third to one-half of the header. The blower has one outlet near the rotor periphery from which air flows into the front part of the header and another outlet, spaced at a greater distance from the rotor periphery, from which air flows into said plenum chamber. The header is movable toward and from said plane relative to the blower, for air bar retraction to facilitate web threading.

422036

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