| 摘要 |
A shake bolt is carried between upper and lower rollers that are mounted on a movable carriage. A saw and a vertical splitting bar aligned with the saw are mounted on a stationary frame adjacent to the carriage. The bolt is advanced by simultaneously rotating said rollers. In one embodiment the bolt is tilted by first rotating the top roller alone. A kerf is cut in the bolt by moving the carriage past the saw blade. A shake is then split from the bolt by returning the carriage while passing the splitting bar through the kerf adjacent to the inner end thereof. The shake has a tip portion of uniform thickness and a thicker naturally split weather portion. In one form, the tip portion is at an angle with respect to the weather portion. A method of making semi-split shakes comprising making a cut into and across an end of a shake bolt to establish a predetermined tip length and splitting the weather portion of the shake from the bolt by applying a prying force within the cut and adjacent to the inner edge of the cut.
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