A drive in I used to work at back in high school used to do them this way:
1.Potatoes were put in a tumbler peeler, which is a spinning drum with rough material on the perimeter of the interior. Took about 30 seconds and water was also spraying in there to help expel the peelings. It still left some of the peel on. 
2. Hand chop with a wall apparatus and cuts fall into a tub of cold water to rinse. Water drained, refilled. 
3. Cuts go into second fresh tub of water and spud spud white is sprinkled in to keep them from turning reddish brown.
4. Put into deep fryer baskets, as needed and allowed to drain.
5. Put basket down into fryer for blanching, for about 2 minutes.
6 Hang rack back up on cart to drain and age for a few hours.
7 Final deep fry until golden brown, stirring with long spoon to separate the fries. 
8. Pour onto tray under heat lamp, salt and serve into fry containers.