Ink regulator, writing instrument and refill unit or refill for such writing instrument

摘要

Ink regulator (1) for a free ink writing instrument, with an air opening (3) through which air can enter the interior (4) of the ink regulator (1), and a control capillary (5), the control capillary (5) for Exchange of air and / or ink between the ink tank and the interior (4) of the ink regulator (1) is arranged, characterized in that between the air opening (3) and the control capillary (5) a buffer element (7) is arranged, wherein the Buffer element (7) in the position of use a capillary channel (8), in which for pressure equalization between the air opening (3) and the interior (4) of the ink regulator (1) a flow of air and / or ink can be formed, and wherein the at least a capillary channel (8) is formed such that in the one capillary channel (8) occurred ink completely fills the cross section (9).