Improvements relating to tamping plugs for use in shot holes for blasting purposes

摘要

877,252. Tamping plugs. STEMMING SUPPLY CO. Ltd. July 4, 1960 [July 3, 1959], No. 22864/59. Drawings to Specification. Class 9(1). A tamping plug is provided comprising a bag made for example of fireproofed paper or polyvinyl chloride and filled with sand, the mouth of the bag then being folded over and secured by a staple or by welding, when the bag is of plastic.