Electrostatic printing with oscillating screen frame and dual printing at a single station

Claim 1

AN ELECTROSTATIC PRINTING APPARATUS COMPRISING: (A) BASE MEANS, (B) A FIRST CONTINUOUSLY ROTATABLE SHAFT OPERATIVELY MOUNTED ON SAID BASE MEANS, (C) AN ACTUATING WHEEL OPERATRIVELY MOUNTED ON SAID SHAFT AND ROTATING THROUGH CONTINUOUS 360* REVOLUTIONS, (D) A SECOND SHAFT OPERATIVELY DISPOSED IN SPACED RELATION TO SAID FIRST SHAFT, (E) A SLOT-WHEEL HAVING A PLURALITY OF ENGAGEABLE SLOTS OPERATIVELY MOUNTED ON SAID SECOND SHAFT AND BEING INTERMITTENTLY ROTATABLE, (F) AN EXTENDED PIN ON SAID ACTUATING WHEEL FOR ENGAGING ANY OF SAID SLOTS ON SAID SLOT-WHEEL AND ROTATING THE SLOT-WHEEL THROUGH 90* ARCS DURING 90* ARCUATE ROTATIONAL MOVEMENTS OF SAID ACTUATING WHEEL, (G) A TURRET OPERATIVELY CONNECTED TO SAID SLOT-WHEEL AND BEING ROTATABLE THEREWITH SO THAT SAID TURRET IS MOVED TO SUCCESSIVE POSITIONS WHICH ARE SPACED 45* APART, (H) A PLURALITY OF ARTICLE RETAINING MEANS MOUNTED ON SAID TURRET AND BEING SIZED TO RETAIN DESIRED ARTICLES FOR PRINTING, (I) AN OSCILLATING SCREEN FRAME OPERATIVELY MOUNTED ON SAID BASE MEANS AND BEING SHIFTABLE BETWEEN UPPER AND LOWER POSITIONS DURING A PRINTING CYCLE, (J) AN ELECTROSTATIC PRINTING SCREEN OPERATIVELY ASSOCIATED WITH SAID SCREEN FRAME AND BEING MOVABLE THEREWITH, (K) MEANS FOR FEEDING A SUPPLY OF ELECTROSCOPIC INK TO SAID SCREEN WHEN SAID ARTICLE RETAINING MEANS ARE ALIGNED WITH SAID SCREEN, (L) MEANS FOR MOVING SAID MOVABLE SCREEN FRAME IN PRETIMED RELATIONSHIP TO SAID TURRET SO THAT EACH ONE OF SAID ARTICLE RETAINING MEANS BECOMES ALIGNED WITH SAID SCREEN, (M) AND MEANS FOR CREATING AN ELECTROSTATIC FIELD BETWEEN SAID SCREEN AND ARTICLE RETAINING MEANS SO THAT INK WILL PASS THROUGH THE OPEN PORTIONS OF THE SCREEN TO THE ARTICLE RETAINING MEANS.