Board Thread:General Discussion/@comment-24200325-20150823123552/@comment-26235098-20150823141031

All a portal/teleporter does is permit the flow of candies between two non-contiguous squares of the board. This is true regardless of whether or not there is a conveyor involved.

Clearly, since a conveyor only moves in one direction, a straight conveyor has nowhere to put the candy at the end that moves forward... so a teleporter is often put in in such situations. (With circular conveyors, they are not necessary.)

But teleporters are also used to move ingredients between isolated quadrants. The concept is the same. Connect two non-contiguous squares.