I don't have Aldi where I live, but we do have a place called WinCo. At WinCo, there are two conveyer belts after the cashier, and the cashier switches which conveyer belt to use by switching a gate. So, once you pay, you go over to your conveyer belt and bag up your purchase, and the stuff from the next customer goes to the other side.

It works pretty well and I actually prefer to reload myself, as opposed to other stores that have someone there to bag for you.