Roller dyeing machine for surface impregnating hides and similar products

Roller machine for surface impregnating leather products with an impregnating liquid, comprising:

• a load-bearing structure which supports an upper impregnating roller, a lower drive roller arranged substantially parallel to the upper impregnating roller and slightly spaced apart so as to create a converging/diverging channel between them whose minimum passage section is approximately equal in height to the thickness of the leather product being worked, said supper and lower roller being rotated in the same rotational direction so that the tangential speeds of said rollers are opposed in said minimum passage section, and at least one conveyor belt arranged at the converging side of said channel so as to forward feed the leather product to be impregnated to the minimum passage section;
• and a pressing device arranged immediately upstream of said minimum passage section which acts flexibly and uniformly over the entire width of the leather product so as to keep it in stable contact with said lower drive roller thereby preventing rolling up of the leather product.