| 摘要 |
1,153,638. Electro-forming metal screen sheet. BUDD CO. Dec.29, 1966 [Dec. 29, 1965], No.58191/66. Heading C7B. Metal screen sheet, e.g. of nickel, is produced by offset printing a resist pattern of insulating dots of electrolyte-resistant coating material on a highly polished rotary drum surface, drying and hardening the coating material on the drum, electro-depositing sheet-forming metal on the drum as cathode as it rotates, peeling the formed screen sheet from the drum, cleaning adherent coating material from the sheet, and cleaning adherent coating material from the drum in preparation for the printing of a fresh resist pattern at the next turn of the drum. The drum may be of stainless steel and may be chromium plated if desired, the resist material may be printing ink or paint, and for forming a nickel sheet the electrolytic bath may be a nickel sulphamate solution and anodes of depolarized nickel may be employed. Provision is made to prevent the solvent used for removing the resist material from contaminating the bath. |
