| 摘要 |
PURPOSE:To wash out the condensed magnetic fluid quickly and permit the recording of stable picture quality by a method wherein the magnetic fluid of more amount than the amount thereof upon recording is supplied for a predetermined period of time before the beginning of the recording to the tip of a multi- stylus recording needle. CONSTITUTION:A supply pump 7 is operated by a flow amount controlling means 11a for the predetermined period of time before the beginning of recording, and the magnetic fluid 8 is blown out of the vicinity of the tip of the recording needle 1. The magnetic fluid 8 is flowed along the slope of the magnet 3 for protrusion and the recording needle 1 by providing a guide member 12a at the vicinity of the tip of the recording needle 1, and the condensed magnetic fluid, adhered to a supply port B and the vicinity of the tip of the recording needle 1, may be washed out in a short time. |
