Scientific American Supplement, No. 1178, June 25, 1898
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Therewere about that time five other rubber reclaiming plants in the UnitedStates, operating either the "acid" or the "mechanical" process, besides nine general rubber factories producing their own reclaimedrubber by the "acid" process. While several of the latter--rubber shoeconcerns controlled by the United States Rubber Company--have beenconsolidated, there has been an increase in the number of rubbermanufacturers reclaiming their own rubber, since the end of the patentlitigation, so that th...e total number of reclaiming plants now probablyis twenty.
The first step in any process for reclaiming rubber is the grinding ofthe waste, for which purpose several machines have been designedspecially, an early patent for disintegrating rubber scrap by"subjecting it to the abrading action of grindstones" having failed tomeet with favor. The most usual chemical treatment is a bath in asolution of sulphuric acid in lead-lined tanks. Generally heat isemployed to hasten the process, through the medium of steam, in whichcase the tanks are tightly closed.
What to read after Scientific American Supplement, No. 1178, June 25, 1898?
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To quickly assess the difficulty of the text, read a short excerpt:
Therewere about that time five other rubber reclaiming plants in the UnitedStates, operating either the "acid" or the "mechanical" process, besides nine general rubber factories producing their own reclaimedrubber by the "acid" process. While several of the latter--rubber shoeconcerns controlled by the United States Rubber Company--have beenconsolidated, there has been an increase in the number of rubbermanufacturers reclaiming their own rubber, since the end of the patentlitigation, so that th...e total number of reclaiming plants now probablyis twenty.
The first step in any process for reclaiming rubber is the grinding ofthe waste, for which purpose several machines have been designedspecially, an early patent for disintegrating rubber scrap by"subjecting it to the abrading action of grindstones" having failed tomeet with favor. The most usual chemical treatment is a bath in asolution of sulphuric acid in lead-lined tanks. Generally heat isemployed to hasten the process, through the medium of steam, in whichcase the tanks are tightly closed.
What to read after Scientific American Supplement, No. 1178, June 25, 1898?
You can find similar books in the "Read Also" column, or choose other free books by Various to read onlineMoreLess
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