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The Iron Age 1880-01-22: Vol 25 Iss 4

1880 Reed Business Information US

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‘The Published every Thursday Morning by DAVID WILLIAMS, No. 83 Reade Street, New York. A Review of the Hardware, Iron and Metal Trades. Vol. XXV: No. 4. On Improvements in Machinery for | Rolling Iron and Steel Plates.* Before proceeding to describe the nature of the proposed improvements, it will be well to notice briefly the method generally adopted at present in rolling plates, as compared with that in use for producing flat bars, angles or other sections. These latter forms of manufactured iron | are produced by means of rolls with several grooves of gradually decreasing sectional area cut on their surfaces, so that generally two, and sometimes three, pairs of rolls are required to contain the number of grooves rough 12-inch strip, is cut to waste on the edges alone. In other words, whereas a pile of 6 cwt. would be heavy enough to make a bar of a given weight 12 inches wide, a g-cwt. pile would be required to produce a sheared plate of corresponding dimensions. This difference, of course, de- creases as the width of the bar or plate increases, because the proportion which the allowance for waste bears to the whole mass becomes less and less the wider the plate. In all cases, …

Citation

The Iron Age 1880-01-22: Vol 25 Iss 4. Reed Business Information US. 1880.