Abstract: In order to greatly shorten the filter exchange time required for detachably winding a filter (20) on the opening portions (2) formed in the outer circumferential surface of a filtration drum (1), projecting or recessed annular mounting portions (6) are respectively formed near edge portions of the outer circumferential surface of the filtration drum, to have portions (7) which prevent the wound filter from moving toward the center in the thrust direction of a main shaft (4) of the filtration drum and which maintain the filter liquid-tight, and the filter (20) is firmly fixed with fastening means (22).

Abstract: A filtering apparatus and filtering system where a hinge belt 10 of a hinge-belt type filtering apparatus 100 is continuously rotated by driving of a drive motor 65 such that hinge scrapers are rotated along a bottom plate 6b of the hinge filtering apparatus main body, from a horizontal part to a slope part of the hinge filtering apparatus main body.

Abstract: In order to greatly shorten the filter exchange time required for detachably winding a filter (20) on the opening portions (2) formed in the outer circumferential surface of a filtration drum (1), projecting or recessed annular mounting portions (6) are respectively formed near edge portions of the outer circumferential surface of the filtration drum, to have portions (7) which prevent the wound filter from moving toward the center in the thrust direction of a main shaft (4) of the filtration drum and which maintain the filter liquid-tight, and the filter (20) is firmly fixed with fastening means (22).

Abstract: A filtration apparatus, used for obtaining cutting oils cleaned by using filtration apparatus so as to reuse the separated cutting oil in machining operations, includes an oil tank for storing filtered cutting oil, a storage tank for temporarily storing the filtration target cutting oil, a rotatably driven filtration drum, rotatably supported in the storage tank and having a side-surface in order to let a filtered oil to flow into the liquid tank, a dynamic seal member provided between the filtration drum and side wall of the storage tank, an injecting means for washing filters and dip-up plates for continuously conveying cutting downward from a charge port to discharge port.