In order to hide the spine, place the back cover on the front then once bound rotate that back cover to the reverse.
GBC Binding Machines
come in many different models that are suitable for low volume home use, right up to very high volume departmental use. You only get one chance to make a first impression so make sure you use a GBC Binding Machine
to bind your next report or proposal for a sharper and more impressive look than ever before. GBC have produced a handy Binding Guide that can be downloaded here