| 摘要 |
A spool assembly upon which can be wound a sheet of material. The spool assembly having at least two tubes, each of the tubes having an annular tube wall with a tube slot along an entire length of the tube wall. The tubes are disposed in opposite ends of a connector, each in annular spaces between radially inner and outer annular connector walls of the connector. A more particular embodiment provides a solar pool cover assembly having a solar pool cover with a flexible sheet having bubbles and secured to the spool assembly. The tube slots have a gap that is sufficiently smaller than a height of the bubbles such that the bubbles cannot pass through the slots.
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