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US 4,122,682 AGranted
Methods of and apparatus for applying roof mats to mine workings
OwnerKarl M. Groetschelinventor
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OwnerKarl M. Groetschelinventor
Estimating the term…
A method of applying a protective wire mesh mat to the undersurface of the roof of an underground mine working and apparatus for applying such mat wherein a coil of the mat is carried on a supporting spindle and is paid out against the undersurface of the roof through a vertically convergent passageway defined by upper and lower jaw plates of an applicator. The applicator has an open side through which the margin of the last applied strip passes so as to be in overlapped or edge to edge relation with the mat strip undergoing application. A coil of fastening strip incorporating staple-like fastening elements is also carried by the apparatus and paid out through the applicator passageway in overlapped relation with the two mat strips and is caused by the convergence of the jaw members firstly to penetrate the two mat strips and then undergo downward bending of the prongs of the staple-like fastening elements before passing out of the exit of the convergent passageway.
A method of supporting the roof of an underground mine working comprising stationing beneath said roof a flexible mat having a stored portion and extended portion leading off from said stored portion, supporting said extended portion at an elevated position adjacent to said roof, holding said elevated portion stationary at a succession of such elevated positions while moving said stored portion along a succession of generally parallel laterally offset paths to withdraw further lengths of mat from said stored portion, and underpinning said extended portions at intervals along their lengths by prop-supported superstructure, the improvement comprising the steps of:
Apparatus for applying a flexible mat to the roof of a mine working along a plurality of generally parallel laterally offset paths comprising:
Dependencies are inferred from the claim text.