| 摘要 |
<p>1,201,422. Filter. MASCHINENFABRIK SACK G.m.b.H. 31 July, 1968 [12 Aug., 1967], No. 36571/68. Heading B1D. Cutting oil from a machine is delivered from inlet chamber 10, where filter aid is added by hopper 26 at the beginning of a cycle, by pump 16 through valve 13 to filter chamber 1, containing inward flow gauze filter tubes, and filtrate is initially returned through valve 6, conduit 7 and chamber 11 to chamber 10, through non-return valve 9, then valve 6 is switched over to deliver filtrate to the machine, once the filter aid is deposited on the tubes and clean oil is passing sight glass 5. After the filter cake on the tubes has built up to undesirable levels, the pump is stopped and valve 13 switched over to discharge the contents of chamber 1 into sedimentation chamber 12, compressed air being admitted through conduit 28 to reverse-flow clean the tubes with filtrate from compartment 3 of chamber 1. More filter aid is added to hopper 26 and a new filtration cycle is begun in chamber 1, but after valve 6 has been switched over to the machine, part of the output of pump 16 is diverted through an injector 23, in conduit 25, which draws oil from sedimentation chamber 12 through a sieve 20 closing its lower end. Sieve 20 is subsequently lifted out by handle 19 together with used filter aid and solids.</p> |
