The splicing and joining make the belt endless. It is done with thermo fusion by heating presses and sometimes cold glued. Reveyron proposes different joining methods and will select those that is best suited for your application.
Sharp fingertip simple splicing (DSP): Joining used for narrow belts or for belts that will work on small drum diameters (knife edge)
Straight or diagonal overlap splicing (PE and PE DIAG): Alternative joining used mainly when you do not have a heating press to thermo-fuse the belt (use cold bonding instead)