| 摘要 |
In a scraper having an apron which may be advanced and retracted relative to the bowl in addition to being raised and lowered to provide a hoeing action and having a bucket type of ejector which may be advanced and retracted in the bowl, highly efficient loading is realized by advancing the ejector to receive the material which is loaded by the apron in the initial portion of the cycle and then retracting the ejector to move such material to the rear of the bowl thereby facilitating subsequent loading at the front of the bowl. During ejection, the apron may be scraped down along the forward surface of the ejector to dislodge material.
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