Importance

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Abstract

An apparatus, in particular writing instrument, for the application of liquid on a surface by means of an application element (12; 25), comprises: a liquid chamber (16) to accommodate a liquid reservoir, a capillary liquid duct (16; 25, 26) to supply said application element (12; 25) with liquid, a capillary storage (18; 26) to temporarily accommodate liquid in case of an air pressure or temperature change, which capillary storage is in direct contact with the capillary liquid duct (16; 25, 26) outside the liquid chamber, a ventilation way (22, 4; 22, 28, 25) passing at least partially through a capillary material (4; 25) and through which air can enter the liquid chamber in case of a reduction in the volume of liquid taken up in the liquid chamber, wherein capillarities of said liquid duct are greater than those of said capillary material of said ventilation way and capillarities of said storage are smaller than those of said capillary material of said ventilation way, which apparatus is characterized in that at least a part (4) of the wall (2, 4; 25) of the liquid chamber (6) includes the capillary material and forms a part of the ventilation way (22, 4; 22, 28) and the smallest capillarity of the capillary material of said ventilation way is greater than that of the larger part of the storage (18; 26) and smaller than the smallest capillarity of the liquid duct (16; 25, 26).

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First Claim