A process for producing electric stacked capacitors including forming a folded track of capacitor materials which is only a fraction of the thickness of the final capacitor, cutting the folded track into segments equalling the length of the capacitor, stacking the segments on a conveyor belt, hardening the stack, providing external contacts and encasing the capacitor. The process may include placing the folded track on their folded edges and applying pressure between a pair of clamps which have recesses to allow the subsequent forming of the contact regions by a metal spraying process.