GumRoller (Eraser residue cleaner)

thingiverse

A neighbor girl had to create a business plan for a revolutionary new product. She came up with an innovative solution - an eraser residue cleaner that actually works. I managed to get my hands on her school drawings, so I decided to surprise her by building a prototype of her invention. The standard office eraser is inserted into the device. As you erase, the eraser leaves behind annoying residue, but don't worry - our clever machine has got this covered. Simply roll the sticky roller over the paper and voila! The residue disappears, leaving your work looking fresh and new again.