Here is a a clip taken from the Discovery Channel documentary 'The First Time Machine'. It is very interesting, but I have heard a similar theory based on 'worm holes'.
The way the machine works is that it allows a portal to be opened from the time it is turned on. So in theory it would be possible information or matter to be brought back from the future to the time that the machine was first turned on.
Interesting theory, but then we have to deal with the consequences of time paradoxes.