Drying process
AssigneeSandoz Ltd.
InventorsChristian Oschatz, Franz Somm
Life of this patent
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Abstract
Disclosed is a process for the removal of liquid from an absorbent substrate, comprising passing the substrate through the nip between a pair of rollers, at least one of said rollers having an effective surface of a sponge material, the sponge material having capillary pores, the average diameter of which is less than 1 mm and at least 50% of said pores having a diameter in the range of 0.1 to 0.001 mm, the pressure applied at the nip between said rollers being less than 1 kg per cm roller length.
Claims15
In a process for the removal of a liquid from an absorbent substrate comprising passing the substrate through the nip of a pair of rollers, of which at least one roller of said pair is provided with a sponge material, the improvement wherein:
- (1) the average diameter of the capillary pores of said sponge material is less than 1 mm and the diameter of at least 50% of the capillary pores being in the range of 0.1 to 0.001 mm;
- and (2) the pressure at the nip of said rollers is less than 1 kg. per cm. roller length.
A roller having a circumferential covering of a sponge material, the average diameter of the capillary pores of said sponge material being less than 1 mm and the diameter of at least 50% of the capillary pores being in the range of 0.1 to 0.001 mm.
A roller assembly comprising a pair of rollers arranged to form a nip therebetween, at least one of said rollers having an endless band of sponge material, the average diameter of the capillary pores of said sponge material being less than 1 mm and the diameter of at least 50% of the capillary pores being in the range of 0.1 to 0.001 mm, entrained therearound and around an auxiliary roller laterally displaced from said pair.
Dependencies are inferred from the claim text.