machine chest मीनिंग इन हिंदी

The machine chest is basically a consistency levelling chest having about 15 minutes retention.
From the machine chest stock is pumped to a head tank, commonly called a " head box ", whose purpose is to maintain a constant head ( pressure ) on the stock as it feeds the basis weight valve.
This is enough retention time to allow any variations in consistency entering the chest to be levelled out by the action of the basis weight valve receiving feedback from the on line basis weight measuring scanner . ( Note : Many paper machines mistakenly control consistency coming out of the machine chest, interfering with basis weight control .)