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Powdering or dusting of sheet material to be printed, to assist sliding, handling and drying of ink after printing, employs electrical field to direct powder onto sheet
Powdering or dusting of sheet material to be printed, to assist sliding, handling and drying of ink after printing, employs electrical field to direct powder onto sheet
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机译:将要打印的片状材料撒粉或撒粉,以帮助在打印后滑动,处理和干燥墨水,它利用电场将粉末引导到片上
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摘要
An electric field (18) is produced between a powdering nozzle (15) and material (10) to be printed. Powder which is to be directed onto the material, is ionized or electrically-charged near the nozzle, such that it is caused to move toward the material to be printed, by the electrical field. The field is non-uniform or uniform. The material is electrically charged, so that the electrical field is formed between it and an earthed powdering nozzle. Gravity assists transfer. An independent claim is included for corresponding equipment.
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