A method for assembling elastic laminates, the method comprising the steps of: providing a first substrate and a second substrate, the first substrate and the second substrate each comprising a first surface (204, 212) and an opposing second surface (206, 214), and defining a width in a cross direction; wrapping the first surface of the first substrate onto an outer circumferential surface of an anvil; advancing an elastic film to a spreader mechanism wherein the spreader mechanism comprises a first disk and a second disk canted relative each other, each disk (116, 118) comprising an outer rim (116b, 118b), wherein as the first and second disks (116, 118) rotate, the outer rims (116b, 118b) are separated from each other by a distance that increases from a minimum distance at a first location to a maximum distance at a second location, the elastic film comprising a first edge and a second edge separated from the first edge in the cross direction by a central region; advancing the elastic film onto the first disk and the second disk at or downstream of the first location; stretching the elastic film to the first elongation in the cross direction by rotating the first disk and the second disk of the spreader mechanism, wherein the step of stretching the elastic film further comprises advancing the central region of the elastic film along a deflection member positioned between the first disk and the second disk; advancing the elastic film from the spreader mechanism to the anvil; consolidating the elastic film to a second elongation in the cross direction, wherein the second elongation is less than the first elongation reducing the elongation from a first stretched length to a second stretched length that is less than the first stretched length and greater than zero; positioning the consolidated elastic film in contact with the second surface of the first substrate on the anvil; advancing the second substrate to position the first surface of the second substrate in contact with the consolidated elastic film and the second surface of the first substrate on the anvil; and ultrasonically bonding the first substrate together with the second substrate with the elastic film positioned between the first substrate and the second substrate on the anvil to form an elastic laminate. providing a first substrate and a second substrate, the first substrate and the second substrate each comprising a first surface (204, 212) and an opposing second surface (206, 214), and defining a width in a cross direction; wrapping the first surface of the first substrate onto an outer circumferential surface of an anvil; advancing an elastic film to a spreader mechanism wherein the spreader mechanism comprises a first disk and a second disk canted relative each other, each disk (116, 118) comprising an outer rim (116b, 118b), wherein as the first and second disks (116, 118) rotate, the outer rims (116b, 118b) are separated from each other by a distance that increases from a minimum distance at a first location to a maximum distance at a second location, the elastic film comprising a first edge and a second edge separated from the first edge in the cross direction by a central region; advancing the elastic film onto the first disk and the second disk at or downstream of the first location; stretching the elastic film to the first elongation in the cross direction by rotating the first disk and the second disk of the spreader mechanism, wherein the step of stretching the elastic film further comprises advancing the central region of the elastic film along a deflection member positioned between the first disk and the second disk; advancing the elastic film from the spreader mechanism to the anvil; consolidating the elastic film to a second elongation in the cross direction, wherein the second elongation is less than the first elongation reducing the elongation from a first stretched length to a second stretched length that is less than the first stretched length and greater than zero; positioning the consolidated elastic film in contact with the second surface of the first substrate on the anvil; advancing the second substrate to position the first surface of the second substrate in contact with the consolidated elastic film and the second surface of the first substrate on the anvil; and ultrasonically bonding the first substrate together with the second substrate with the elastic film positioned between the first substrate and the second substrate on the anvil to form an elastic laminate.