Abstract: A method for manufacturing a laminated iron core product includes laminating a plurality of iron core members which are punched from a first metal plate to form a laminate, removing oil adhering to the laminate, removing oil adhering to an end surface plate which is punched from a second metal plate, and disposing the end surface plate on an end surface of the laminate and welding the end surface plate and the laminate.

Abstract: A method for manufacturing a laminated iron core product includes laminating a plurality of iron core members which are punched from a first metal plate to form a laminate, removing oil adhering to the laminate, removing oil adhering to an end surface plate which is punched from a second metal plate, and disposing the end surface plate on an end surface of the laminate and welding the end surface plate and the laminate.

Abstract: An electrostatic type ink jet printing apparatus, wherein a charger activated by a direct current source is disposed close to the surface of the recording paper conveying drum or belt in order to charge the surface of the drum or belt inversely to the polarity of charge on charged ink drops. On that occasion, charged areas may be intermittently disposed on the recording paper conveying drum or belt. Moreover, the recording paper is tightly and electrostatically fixed on the recording paper conveying drum or belt, so that the charged condition on the surface of the recording paper is kept stable and therefore formation of high quality printed image may be realized regardless to the environmental circumstance related, for instance, to humidity, electric field, and the like.

Abstract: An ink droplet ejection system includes a pair of electrodes located in the vicinity of an ejection nozzle which defines an outlet of an ink supply passageway. An electric field is applied periodically to an ink fed under pressure to the nozzle in a direction perpendicular to or parallel with the direction of ink flow, so that a continuous stream of ink ejected from the nozzle is separated into successive droplets.

Abstract: In an ink-jet printer or the like, in order to maintain a predetermined concentration of ink, a diluent equal in quantity to the solvent of ink, which has been evaporated, is supplemented to the ink recirculation system.