| 摘要 |
A scroll-type display sign is provided, including a frame, a first fixed shaft connected on the frame, a second fixed shaft connected on the frame parallel spaced from the first shaft, a first scroll roller rotatably mounted on the first shaft, a second scroll roller rotatably mounted on the second shaft, a signage web connected on the first and second scroll rollers, a drive sprocket affixed with the first scroll roller and mounted on the first shaft, a spring sprocket affixed with the second scroll roller and mounted on the second shaft, a constant force spring connected with the spring sprocket to tension the signage web, and a motor torsionally connected with said drive sprocket.
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