A scraper device not guided imperatively for the extraction of carbon. (Machine-translation by Google Translate, not legally binding)

摘要

A scraper device not guided imperatively for the extraction of cardboard, characterized by two carrier bodies with thick walls, equal to each other, which constitute the essential weight of the extraction tool, which are prepared on the outer side for the exchangeable application of bodies tool holders in the manner of plates and are completed by a traverse, in which are provided to achieve different force-attack lever arms in line with each other stop devices for the traction branch, to give a U-shaped body. (Machine-translation by Google Translate, not legally binding)