To provide an air knife which is constituted so that the energy loss at the air knife can be lowered and the air having a uniform flow rate and flow velocity can be withdrawn from a blowoff port of the air knife even in such low air pressure that the air is supplied from a comparatively lower-powered blower and can be incorporated easily into an automatic treatment apparatus for supporting the main surface of a plate-shaped material to be erected almost vertically and conveying the plate-shaped material.
Such the above-mentioned problem that the energy loss at the air knife can be lowered and the air having the uniform flow rate and flow velocity can be withdrawn from a blowoff port of the air knife even in such low air pressure that the air is supplied from the comparatively lower-powered blower is solved by a gas flow straightening unit 13 for forming an air current from a source of air supply into a belt-like air current, expanding the belt-like air current in the longer side direction of the cross section of the flow straightening unit and contracting the belt-like air current in the shorter side direction of the cross section.
KOMURO TOYOICHI
NAKAGAWA KUNIHIRO
Next Patent: SEMICIRCULAR AIR KNIFE HEAD