In this Instructable I will show you a simple and easy way to make your own book binding cradle which only took me around 15 mins to make thanks to the tools at TechShop San Jose.
You will need:
a 24"x12" piece of wood or other material to cut your cradle out of
blue painter's tape
wood glue (or another type of glue depending on what you make your cradle out of)
Laser cutter or wood working tools
You could use any 1/4" thick material for this project (acrylic, cardboard, metal, etc...). I have chosen to use 1/4" plywood because of its durability and how easy it is to work with.
If you chose wood or acrylic, you could cut all your pieces out by hand using wood working tools, but since I have access to TechShop's laser cutters, I chose to build a file and cut my pieces out that way.
Take a straight edge and place it from one corner to the one diagonally opposite and draw a line about 1/2 way down, then do the same thing for the other 2 corners so you are left with a V.
Repeat on the front and back of both side pieces.
Although you could potentially put the sides together with a hinge, I found that the blue tape is very forgiving when you're punching holes in the paper you are about to bind, and is also cheap and easy to replace once your tape is too chewed up to use anymore.