Instead of producing an electric current when light shines onto it, it captures the pattern of the light as a pattern of static electricity.
I've colored and simplified the numbering to show roughly what's happening: We can see that by taking a look at one of the design drawings from his original photocopier patent. Sparks like this can be dangerous, potentially igniting a fire.
Since the electrons have left your pullover, it has fewer electrons than it should have and an overall positive electrical charge. As you can see from all the dozens of small numbers on the original drawing, this is a very simplified account of what's really happening—and all the parts and pieces that are involved.
Carlson, September 12, 1944.
Chester Carlson , working with a physicist friend, Otto Kornei, successfully makes the first photocopy using a zinc slide and a glass plate. The human-end of making a copy begins with a few basic steps: William Grylls Adams and Richard Evans Day use a selenium-platinum junction to turn light into electricity, effectively building the first solar cell.
Out of the three this is the one people will know it most for. Many power stations burn fossil fuels such as coal and oil.
An "electrical shadow" of the page forms on the photoconductor. Smoke particles are attracted to the collecting plates.
Smoke comprises tiny solid particles, such as unreacted carbon, which can damage buildings and cause breathing difficulties. At the end of the sequence a scraper removes any toner left on the drum and the whole process is repeated with a new image.
IBM produces its Copier I, the first machine to use an organic polymer as the photoconductor. A thoughtful look at how our idea of printed documents has changed, from the invention of printing and photocopying to the World Wide Web. Where it is white you do not. Light comes from the Sun and powers things like flashlights; electricity flows round wires and makes things like vacuum cleaners and refrigerators work. In a copier, you make an "image" -- in static electricity -- on the surface of the drum.