An automatic document feeder is generally used for faxing multiple pages at one time.

ADF means automatic document feeder.

A paper tray will just take (or make) a stack of documents in order, without any reversing or double siding. Sometimes it is referred to as the place where the printed paper exits.

An automatic document feeder will flip and move those documents around, and also duplex a large stack of documents.

Some advantages of an automatic cat feeder would be that it feeds your cat for you and feeds your cat when you're not around. Some other advantages to an automatic cat feeder is that you can manage how much food your cat eats.

The Perfect Pet Feeder is a safe, reliable, and clean way.There is also the Ergo 8 Day Auto Pet Feeder, Walmart also carries reliable automatic pet feeders, the PerfectPetFeeder Luxe is also reliable, and the Pet Mate C50 Automatic Pet Feeder is also reliable.