Patent ID: 7908830

Claim:
A stretch wrap assembly comprising: a base; a turntable mounted on the base; a column extending upwardly from the base; and a carriage vertically movable upon the column, the carriage being configured to have stretch wrap thereon for wrapping a product on the turntable; the carriage including a first nip roller, a first pre-stretch roller, a second pre-stretch roller and a second nip roller; wherein the carriage is configured to have stretch wrap threaded through the carriage from a roll of stretch wrap, around a portion of a circumference of the first nip roller, around a portion of a circumference of the first pre-stretch roller, around a portion of a circumference of the second pre-stretch roller, around a portion of a circumference of the second nip roller and to the package; wherein the first nip roller is configured to maintain the stretch wrap against the first pre-stretch roller as the stretch wrap is stretched by the first pre-stretch roller, and the second nip roller is configured to maintain the stretch wrap against the second pre-stretch roller as the stretch wrap is stretched by the second pre-stretch roller; wherein the first nip roller and the second nip roller can move rotationally and laterally relative to the first pre-stretch roller and the second pre-stretch roller, respectively; wherein a center of rotation of the first nip roller is located on a loaded side of a line drawn between a center of rotation of the first pre-stretch roller and a center of rotation of the second pre-stretch roller; and wherein a center of rotation of the second nip roller is also located on the loaded side of the line drawn between the center of rotation of the first pre-stretch roller and the center of rotation of the second pre-stretch roller.