Electrophotographic apparatus for production of plural images on a sheet

Electrophotographic apparatus for sequentially imaging successive frames of a multi-frame photosensitive substrate which comprises:

• i. a discrete charging/exposing station positioned on a predetermined path and comprising means for impressing a substantially uniform electrostatic charge on one of said frames of said multi-frame photosensitive substrate and means for exposing said charged frame to a radiation pattern to form a latent electrostatic image;
• ii. a discrete processing station positioned on said predetermined path and comprising means for developing said latent electrostatic image;
• iii. a second discrete processing station positioned on said predetermined path and comprising means for fixing said developed image;
• iv. indexing means for changing the relative position of said substrate to said stations (i), (ii), and (iii), said indexing means performing a single advancing step which changes the position of the first frame from station (i) to station (ii) and performing a single returning step which both changes the first frame from the position of station (ii) to station (iii) and positions a second frame at station (i);
• and
• v. said station (ii) is positioned in the advancing direction along said predetermined path from said station (i) and said station (iii) is positioned in the returning direction from said station (ii) along said predetermined path so that a single indexing step presents the developed first frame to the fixing station and the second frame to the charging/exposing station.

Photographic reproduction apparatus for imaging a photosensitive substrate which comprises:

• i. indexing means for advancing a photosensitive substrate through a predetermined path;
• ii. discrete means positioned along said path comprising means for exposing only a selected one of several predetermined fractional areas of the photosensitive substrate to a radiation pattern to form a latent photographic image;
• iii. discrete means for developing said latent photographic image positioned along said path at a distance of x predetermined fractional areas downstream of the said exposure means (ii);
• iv. discrete means for fixing said developed image positioned along said path intermediate the means (ii) and (iii) and at a distance of less than x predetermined fractional areas downstream of the said exposure means (ii).

A microelectrophotographic recording organization which comprises:

• i. a surface for supporting intelligence to be microreproduced;
• ii. means for supporting a transparent electrophotographic microfiche card;
• iii. means for illuminating the surface and reflecting an image of the intelligence therefrom;
• iv. means for directing the reflected image through a lens system having a lens axis, said lens system comprising
• v. a discrete charging/exposing module, said module also comprising means for impressing a substantially uniform electrostatic charge on only a selected one of several predetermined fractional areas of the microfiche card and means whereby a microimage is projected and exposed onto the charged fractional area of the said microfiche card to form a latent electrostatic microimage;
• vi. a discrete processing module comprising means for developing said latent electrostatic microimage;
• vii. a second discrete processing module comprising means for fixing said developed microimage;
• viii. indexing means for moving said selected one of said several fractional areas through a predetermined path past said modules (v), (vi) and (vii) and along which predetermined path and parallel thereto are positioned the said modules (v), (vi) and (vii), said indexing means presenting a selected second of said several predetermined fractional areas of said microfiche card to said module (v) as the said selected one of said several fractional areas has advanced at least to a point of registration with said fixing module (vii), said predetermined path including an advance/return segment;
• ix. means for actuating said discrete processing modules (v), (vi) and (vii) to successively perform their respective functions of charge/expose, develope and fix according to pre-programmed sequential access, said pre-programmed sequential access being functionally coordinated with said indexing means (viii);
• and
• x. logic network and control means for automatically activating and functionally coordinating said indexing means (viii) and said actuating means (ix).