TRAK is a mobile printing structure which can be attached to the rear side of the laptop screen. Users can just clip on the print head and print an A4 sized document conveniently. By using the ‘toy train’ structure, the separate mechanism design enables the track of TRAK to attach to the laptop. The TRAK will be an alternative choice of the traditional printer.

Currently most of the inkjet printers on the market are huge and heavy. People don't want to carry around a big "monster" like this, but it's still necessary to have the ability to print out their documents just in case. We can briefly analize the structure of the inkjet printer .The important parts to make an inkjet printer work are the track and cartridge. Why don't we erase the extra components to make it lighter and smaller? The objective of this concept is to do the same printing as a normal printer while reducing the dimensions and materials for this device.