A belt splicer comprising: a first jaw and a confronting second jaw supporting belt butt ends to be spliced together; a first jaw opener connected to the first jaw and a second jaw opener connected to the second jaw, each of the first and second jaws (23, 23') including: a spring mechanism connected to one of the first and second jaws and having a spring; and a crank mechanism having a crank coupled to the spring mechanism to compress and release the spring and to move the one of the first and second jaws toward the other of the first and second jaws; wherein the release of the spring thrusts the one of the first and second jaws away from the other of the first and second jaws, characterised in that the belt splicer further comprises: a master shaft connected to the crank mechanism of the first jaw opener to turn its crank; a slave shaft coupled to the master shaft to rotate together in synchronism, wherein the slave shaft is connected to the crank mechanism of the second jaw opener to turn its crank in synchronism with the crank of the first jaw opener so that the first and second jaws are closed together and so that the compressed springs of the first and second jaw openers are released simultaneously to thrust the first and second jaws open. a first jaw and a confronting second jaw supporting belt butt ends to be spliced together; a first jaw opener connected to the first jaw and a second jaw opener connected to the second jaw, each of the first and second jaws (23, 23') including: a spring mechanism connected to one of the first and second jaws and having a spring; and a crank mechanism having a crank coupled to the spring mechanism to compress and release the spring and to move the one of the first and second jaws toward the other of the first and second jaws; wherein the release of the spring thrusts the one of the first and second jaws away from the other of the first and second jaws, characterised in that the belt splicer further comprises: a master shaft connected to the crank mechanism of the first jaw opener to turn its crank; a slave shaft coupled to the master shaft to rotate together in synchronism, wherein the slave shaft is connected to the crank mechanism of the second jaw opener to turn its crank in synchronism with the crank of the first jaw opener so that the first and second jaws are closed together and so that the compressed springs of the first and second jaw openers are released simultaneously to thrust the first and second jaws open. a spring mechanism connected to one of the first and second jaws and having a spring; and a crank mechanism having a crank coupled to the spring mechanism to compress and release the spring and to move the one of the first and second jaws toward the other of the first and second jaws; wherein the release of the spring thrusts the one of the first and second jaws away from the other of the first and second jaws, characterised in that the belt splicer further comprises: a master shaft connected to the crank mechanism of the first jaw opener to turn its crank; a slave shaft coupled to the master shaft to rotate together in synchronism, wherein the slave shaft is connected to the crank mechanism of the second jaw opener to turn its crank in synchronism with the crank of the first jaw opener so that the first and second jaws are closed together and so that the compressed springs of the first and second jaw openers are released simultaneously to thrust the first and second jaws open. a master shaft connected to the crank mechanism of the first jaw opener to turn its crank; a slave shaft coupled to the master shaft to rotate together in synchronism, wherein the slave shaft is connected to the crank mechanism of the second jaw opener to turn its crank in synchronism with the crank of the first jaw opener so that the first and second jaws are closed together and so that the compressed springs of the first and second jaw openers are released simultaneously to thrust the first and second jaws open.