| 主权项 |
1. An apparatus comprising:
a frame comprising a first portion and a second portion spaced apart and opposing the first portion, wherein the first and second portions each comprise an outer track and an inner track that extend parallel with the outer track, wherein the outer and inner tracks define a machine direction; a transport member defined by a first end portion, a second end portion, and a central portion separating the first and second end portions, wherein the transport member is configured to advance in the machine direction about a closed travel path, wherein the transport member comprises:
first and second outer translation rollers operatively connected with the first end portion of the transport member and operatively engaged with the outer track of the first portion of the frame;first and second inner translation rollers operatively connected with the first end portion of the transport member and operatively engaged with the inner track of the first portion of the frame, wherein the first outer translation roller, the second outer translation roller, the first inner translation roller, and the second inner translation roller are spaced apart in the machine direction;third and fourth outer translation rollers operatively connected with the second end portion of the transport member and operatively engaged with the outer track of the second portion of the frame;third and fourth inner translation rollers operatively connected with the second end portion of the transport member and operatively engaged with the inner track of the second portion of the frame, wherein the third outer translation roller, the fourth outer translation roller, the third inner translation roller, and the fourth inner translation roller are spaced apart in the machine direction. |
