Importance

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Abstract

Two methods of producing a ribbon-shaped stream of ink and of producing an orifice for the narrow ribbon stream under 0.0005 inches thick are disclosed. Also a rotating drum-like configuration with electrostatic sites on its surface is disclosed. The drum, due to irregularities on its surface, breaks the ribbon into segments corresponding to the sites. If desired, the segments will upon release from the drum form side by side broad streams of directionally controlled droplets. The axial spacing between the apparent origins of the droplet streams can be made less than the minimum center to center spacing between control sites, because the sites can, but need not, be located along helical paths so that successive sites on a helical path would participate in originating different streams. Site and segment spacing may be only a few thousandths of an inch. Drum construction, parallel wiring for duplicate wedges around the drum, slit cleaning, and drum cleaning are also disclosed.

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First Claim