Abstract: An apparatus and method are provided for generating a foam from a preheated dye solution and subsequently applying the foam to continuous strands of yarn wherein the foam is driven by a pressure differential. The apparatus has a foaming pan for producing the foam from the dye solution and a gas. The pan opens into a foam transmission chamber at or near ambient pressure which fluid communicates with an evacuated spent foam discharge chamber across an open interface. The yarn is dyed by conveying it through the open interface and contacting it with the foam which is drawn across the open interface in a flow path perpendicular to the yarn by the pressure differential between the foam transmission and discharge chambers.

Abstract: A carpet printing method is disclosed, and an apparatus for carrying out the method. The method includes the steps of supporting a piece of fabric on a perforate belt, generating a foam adjacent to the fabric and directing the foam through the belt to treat the fabric. The apparatus includes a pan having pipes for admitting dye and air into the pan to generate a foam. A belt is disposed across the open top of the pan, the belt carrying the fabric. The air both foams the liquid and provides pressure within the pan to urge the foam through the belt and into the fabric.