The device that uses static electricity to form images is a xerographic machine, commonly known as a photocopier.

Here's how it works:

1. Charging: A drum coated with a photoconductive material is electrostatically charged.

2. Exposure: The image to be copied is projected onto the drum, causing the charged areas to lose their charge in proportion to the light intensity.

3. Toner Application: Fine toner particles, which are attracted to the remaining charged areas on the drum, are applied to the drum surface.

4. Transfer: The toner image is transferred to the paper.

5. Fusing: Heat and pressure are applied to permanently fuse the toner to the paper.

The process relies on the principle of static electricity to attract the toner to the charged areas on the drum, creating the image.