Machine for producing plates and prints from microfilm

Claim 1

A machine comprising an electrostatic copier having a casing with an open top, storage means for paper, said paper of the type coated with a material which holds an electrostatic charge which is discharged bY exposure to light, corona means for applying a static charge to said paper, support means for supporting charged paper below said open top, a toner trough for subjecting said paper to a toner chemical comprising carbon ions in a dispersant, transport means for advancing said paper from said storage means through said corona means to said support means, holding said paper at said support means, and then advancing said paper through said toner trough to the exterior of said casing, and an electrical drive for said transport means; an enlarger having a lens mounted to project light through said open top, focusing means to focus said light on paper on said support means, a source of light, light timing means for optically connecting said source and said lens for a limited time period; an electrical timer controlling opening and closing of said light timing means; a film advance having a frame interposed between said light timer means and said lens, a microfilm input reel mount at one end and a microfilm takeup reel mount at the opposite end of said frame, guide means on said frame for centering film fed from said input reel laterally of said frame relative to the optical axis of said lens, film engaging means engaging said film to pull said film longitudinally of said frame, and longitudinal film moving means for centering frames of film longitudinally relative to said optical axis, said last-named means comprising a motor arranged to drive said film engaging means, motor disengaging means driven by said film engaging means to discontinue drive of said film after said film has advanced a predetermined distance, and stop means accurately limiting forward movement of said film; and an electrical circuit means to first advance paper from said storage means to said support means, then to energize said electrical timer to open said light timing means for a preselected interval, and then simultaneously to advance said film one frame length while advancing one sheet from said support means out of said casing while advancing the next sheet from said support means out of said casing.