摘要:
An adjustable lumbar support for a chair back having a frame with a top end and a bottom end. The frame has a series of flexing zones and a series of control zones. The adjustable lumbar support for a chair back further includes a support having a first end and a second end. The first end of the support is adapted to engage the top end of the frame. The lumbar support also includes an adjusting means adapted to adjust the support in a vertical plane for flexing of the frame and the chair back in a horizontal plane. The adjusting means is also adapted to engage the second end of the support and adapted to engage the bottom end of the frame. The frame is mounted to the chair back.
摘要:
A radio frequency welding system for flexible work pieces having a top-side and an underside. The welding system includes a fixed weld platform, a mobile radio frequency welder adapted to move over the fixed weld platform, movable welding electrodes configured over the fixed weld platform and adapted to engage the underside of the flexible work pieces and movable grounding apparatus adapted to engage the fixed weld platform and the mobile radio frequency welder so as to provide a return radio frequency electrical circuit.