Philly entrepreneurs who created a kid-safe saw for cardboard will cut their teeth on tonight's episode of "Shark Tank." ...

The annexed engraving is a perspective view of a machine for cutting paper, pasteboard ... between cleats inside of the box. This rack-bar meshes into a pinion inside of the sliding stock ...

DIY Automatic Coin Sorting Machine from Cardboard v2.0 For this project you need cardboard, cutting knife, battery, electric ...