A machine for treating a fabric (T) with air, comprises a tunnel (10) for pneumatically transporting the fabric and means for injecting the air into the tunnel above and/or below the fabric and comprising at least one diverting valve (16;18) located substantially half way along the tunnel and having two channels (16a,16b;18a,18b) which are oriented to direct the air flow entering the tunnel in one direction or the other. The valve comprises an adjustable baffle (17;19) adapted to shut off access to the channels (16a,16b;18a,18b) either wholly or partly. In the treatment method of the invention, the air flow (F;F) entering the tunnel is divided into two unequal components (F.sub.1, F.sub.2; F.sub.1, F.sub.2) directed towards opposite ends of the tunnel.

The present invention provides a conveyor belt tracking system for a dryer having a web of a mesh material having a protrusion extending along the length proximal one lateral edge and above a flat surface and a first generally cylindrical roller having a three-tiered slot for receiving the protrusion and two flanking shallow tracks for receiving base flanges.

The present invention relates to an apparatus for evaluating drying quality of an electrode, and the apparatus includes: an oven configured to provide a space in which an electrode is dried; a measuring unit configured to be positioned at an outlet of the oven and measure a color coordinate value of an electrode active material layer with respect to the dried electrode; and an determination unit configured to determine whether the electrode is dry from the color coordinate value, wherein the determination unit sets a reference value, and determines that a dry state of the electrode is defective if the measured color coordinate value is less than the reference value, and a difference between the measured color coordinate value and the reference value is more than a preset value.

The present invention provides a conveyor belt tracking system for a dryer having a web of a mesh material having a protrusion extending along the length proximal one lateral edge and above a flat surface and a first generally cylindrical roller having a three-tiered slot for receiving the protrusion and two flanking shallow tracks for receiving base flanges.

The present invention relates to an apparatus for evaluating drying quality of an electrode, and the apparatus includes: an oven configured to provide a space in which an electrode is dried; a measuring unit configured to be positioned at an outlet of the oven and measure a color coordinate value of an electrode active material layer with respect to the dried electrode; and an determination unit configured to determine whether the electrode is dry from the color coordinate value, wherein the determination unit sets a reference value, and determines that a dry state of the electrode is defective if the measured color coordinate value is less than the reference value, and a difference between the measured color coordinate value and the reference value is more than a preset value.

An electrode drying device includes: a drying chamber having an inlet for receiving the electrode substrate on one side and an outlet for discharging the electrode substrate on other side; a piston rod positioned inside the drying chamber, extending upwardly and downwardly to press against both end portions in the width direction of an electrode substrate; a cylinder for moving a piston rod up and down in the thickness direction of the electrode substrate; and a plate coupled to an end facing the electrode substrate of the piston rod, and extending in a direction perpendicular to the width direction of the electrode substrate, so that even, the piston rod presses on the two end portions to suppress the bending phenomenon of the two end portions, and the plate coupled with the piston rod blocks the hot air applied to the two end portions to prevent excessive drying by hot air.