Abstract: The size applicator includes first and second spaced-apart squeeze rolls supported for rotation on a common horizontal axis and having their lower peripheral surface portions at least partially submerged in size solution contained in an open top pan. A single combination immersion and squeeze roll is positioned between the first and second squeeze rolls and on a common horizontal azis with said first and second squeeze rolls. The lower peripheral surface of the combination immersion and squeeze roll is also at least partially submerged in the size solution and pressure engagement is applied between the combination roll and the first and second squeeze rolls to form a pair of yarn squeezing nips therebetween.

Abstract: A washing machine suitable for washing a washable dust mat comprises means for supplying a main wash liquid to each mat in turn from a tank, means for collecting at least the used main wash liquid and returning it to the tank, an overflow from the tank, means for employing the overflow of liquid from the tank in a pre-washing operation for each mat, and means for rinsing the washed mat. A single supply of water is thereby recirculated to provide the main wash liquid and also provides the pre-wash liquid.

Abstract: A rinsing machine suitable for rinsing a washable dust mat is provided with first squeeze means, pressure means downstream of the first squeeze means and at least one intermediate squeeze means between the first squeeze means and the pressure means. Rinsing water is applied onto the mat between the pressure means and the last intermediate squeeze means, part of the rinsing water being allowed to pass upstream of each intermediate squeeze means in turn whereby the mat is rinsed at least twice from the single supply of rinsing water. The means which allow part of the rinsing water to pass upstream of each intermediate squeeze means is disposed within the length of the respective intermediate squeeze means. A washing machine comprises the rinsing machine and discharge means upstream of the first squeeze means for flushing a mat with a washing liquid.