| 摘要 |
An improved paper tensioning device, for use with a chart recorder or densitometer of the type where the paper is tightly wound around a hollow core, which paper tensioning device prevents the chart paper from unwinding too fast. The paper tensioning device comprises a rod and plug combination with the plug secured to one end of the hollow core and with the rod being inserted through the hollow core, from the other end thereof, to mate with the plug. Axial pressure on the rod is maintained to cause a constant drag on the hollow core and on the chart paper. The plug and hollow core may be an integrally formed unit onto which the paper is wound. Optionally, the rod and plug may be a one piece unit or the rod, plug and core may be a one piece unit.
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