Patent Document ID: 4413899
Application ID: 06229730
Patent Status: 1

Claim One:
1. A two color copying apparatus comprising a single copying apparatus to produce copy sheet duplicates of an original of two colors and a white region with the copy sheet duplicates having two colors and a white region in the same areas corresponding to the areas of the original, the apparatus including a photoconductive material around which is arranged a charging unit, an exposure unit, a developing unit having two sections one of which is adapted to one color development and the other is for another color development, a transfer unit for transferring a toner image from said photoconductive material to copy sheet, and a cleaning unit, characterized in that switch means is provided for selecting a copy mode in which duplication is performed, the switch means including control means to actuate certain combinations of the aforementioned units and sections to obtain the two-color copying mode, in which both colors of the original are copied using two colors on the copy sheet, one color copying mode in which both colors of the original are copied using one color on the copying sheet or erasable mode in which one of the two colors of the original is not duplicated on the copy sheet while the other color is duplicated on the copy sheet.