Method and apparatus for xerographically printing a composite record of fixed and variable data

An improved xerographic printing process of the class wherein a latent electrostatic image is formed on an electrically insulative surface, developed, and transferred onto a record medium, the improved process being characterized in that it provides the capability of forming a latent, electrostatic image derived from first and second complementary sources of information, the improved process including the steps of:

• (a) imaging a light pattern representative of the information from the first source onto a first photoreceptive medium, the first photoreceptive medium being formed of an electrically conductive base layer and a photoconductive receiving layer having the property of persistent conductivity, to form a conductive image of the information from the first source;
• (b) transferring and transforming the conductive image from the first photoreceptive medium onto a second photoreceptive medium in the form of an electrostatic image of the conductive image, the second photoreceptive medium being formed of an electrically conductive base layer and a photoconductive receiving layer;
• and
• (c) imaging a light pattern representative of the information from the complementary second source onto the second photoreceptive medium to form a composite electrostatic image.

Apparatus for xerographically printing a composite record of information derived from first and second complementary sources of information comprising:

• first imaging means for forming a light pattern representative of information from the first source;
• first photoconductive means, responsive to the light pattern representative of information from the first source, for forming a conductive image of such information;
• second photoconductive means for supporting a latent electrostatic image;
• image transfer means for transferring the conductive image from the first photoconductive means and transforming it into a corresponing latent electrostatic image on the second photoconductive means;
• second imaging means for forming a light pattern representative of information from the second source and imaging such light pattern onto the second photoconductive means to form a corresponding latent electrostatic image thereon;
• image development means for developing the resultant electrostatic image on the second photoconductive means;
• and
• image removal means for removing a developed image from the second photoconductive means and placing it onto a record medium.

An improved xerographic printing system of the class wherein an electrostatic image representative of an informational source is formed on a photoconductive surface, developed, and then transferred onto a medium to form a record thereof, the improved system being characterized in that it provides the capability of forming a latent, electrostatic image derived from first and second complementary sources of information, the improvement comprising:

• first imaging means for forming a light pattern representative of information from the first source;
• first photoconductive means, responsive to the light pattern representative of information from the first source, for forming a conductive image of such information;
• second photoconductive means for supporting a latent electrostatic image;
• image transfer means for transferring the conductive image from the first photoconductive means and transforming it into a corresponding latent electrostatic image on the second photoconductive means;
• and
• second imaging means for forming a light pattern representative of information from the second source and imaging such light pattern onto the second photoconductive means to form a corresponding latent electrostatic image thereon, which image forms a part of an overall composite image based on information from the first and second information sources.