DEVICE FOR REDUCING EFFECT OF CHANGE IN AMBIENT HUMIDITY ON IONOGRAPHIC PRINTING MACHINE

摘要

PURPOSE: To protect the printhead of an ionic type printing machine against the adverse effects of humidity. CONSTITUTION: A conductive coating film 31 arranged on a marking head 32 part near a charge receiver 42 is electrically connected to a housing 10 so that the voltage potentials of the housing 10 and the marking head 32 are substantially equalized. Thus it is possible to set the device at a single operating state which enables the device to be operated very near its breakdown threshold at all humidity levels under the described arrangement.