PAD PRINTING METHOD

PURPOSE:To facilitate a plate-making operation in pad printing and eliminate the need for a squeegeeing step using a doctor blade by making a plate from one of a pair of electrodes through utilizing such a property of a sticky ink that the ink becomes non-sticky to the electrode when a voltage is ap...

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Bibliographic Details
Main Authors ARAHARA KOZO, MATSUMOTO KENICHI, KAI TAKASHI, KOBAYASHI MOTOKAZU, TOYAMA JO, FUKUMOTO HIROSHI, YUASA TOSHIYA
Format Patent
LanguageEnglish
Published 10.04.1990
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Summary:PURPOSE:To facilitate a plate-making operation in pad printing and eliminate the need for a squeegeeing step using a doctor blade by making a plate from one of a pair of electrodes through utilizing such a property of a sticky ink that the ink becomes non-sticky to the electrode when a voltage is applied to the ink by the pair of electrodes. CONSTITUTION:A conductive printing plate 4 comprising an insulator pattern 2 on the surface of a conductive base 1 is coated with an ink 3 in a uniform thickness by a coating means 5. A conductive rubber 7 fixed on a conductive printing plate 6 is pressed against the surface of the ink 3 applied to the printing plate 4, and a voltage is applied between the printing plate 6 and the printing plate 4 through the rubber 7 and the ink 3 by a power supply 8. The ink applied to the conductive surfaces becomes non-sticky on the cathode side, so that when the rubber 7 is separated from the plate 4, an ink pattern 3a is formed on the surface of the rubber 7. On the other band, the ink 3 applied to the insulator parts 2 is not supplied with any voltage, and does not become non- sticky, so that the ink is left as it is on the plate 4, thereby forming an ink pattern 3b. When the ink pattern 3b is transferred, an image reverse to the ink pattern 3a is obtained.
Bibliography:Application Number: JP19880250170