| 摘要 |
A pipe wrap machine capable of dispensing one or more continuous strips of pipe wrapping material in a constant spiral path around a pipe includes mechanisms for simultaneously setting and calibrating the pitch of the spiral path of the machine. The shafts of three longitudinally aligned pairs of wheels are connected so that each pair of wheels can be simultaneously rotated to a selected angular alignment in relation to the pipe circumference. Each connecting rod is provided with an indicator and scale, so that each pair of wheels may be easily rotated to a precalibrated position to provide the desired amount of pitch. Each of the wheel shafts extends through a collar mounted on the machine frame. A set screw through each collar permits locking of its shaft at selected lengths of extension through the collar. Depending upon the diameter of the pipe to be wrapped, the set screws are loosened, the shafts extended to conform to the length of a precut spacing rod selected according to intended pipe diameter, and the set screws retightened to lock each shaft at precisely the right length for the pipe to be wrapped.
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