A water filter system including a filter cartridge removably secured in a container. The filter cartridge includes a handle extending from the filter cartridge, where the handle includes at least one vent hole, so that air within the filter housing moves outwardly through the at least vent hole during filtration.

A fiber filtering apparatus includes: an enclosure including an upper box and a lower box communicating with the upper box; a strainer installed in the upper box along a longitudinal direction; a plurality of fiber yarn media configured to be fixed to upper and lower fixing means each coupled to upper and lower parts of the strainer; a plurality of fiber ball media configured to be embedded in the lower box to form a second filtering layer; a first pipe configured to be formed on one side wall on the lower part of the upper box and introduced with raw water during filtration and drain backwashing water during backwashing; and a second pipe formed on one side wall on a lower part of the lower box and drain filtered water during the filtration and introduced with washing water during the backwashing.

A fiber filtering apparatus includes: an enclosure including an upper box and a lower box communicating with the upper box; a strainer installed in the upper box along a longitudinal direction; a plurality of fiber yarn media configured to be fixed to upper and lower fixing means each coupled to upper and lower parts of the strainer; a plurality of fiber ball media configured to be embedded in the lower box to form a second filtering layer; a first pipe configured to be formed on one side wall on the lower part of the upper box and introduced with raw water during filtration and drain backwashing water during backwashing; and a second pipe formed on one side wall on a lower part of the lower box and drain filtered water during the filtration and introduced with washing water during the backwashing.

A deep media bed filter is combined with an oil skimmer integrated into the filter, the oil skimmer including an arrangement for collecting oil floating on the water to be filtered in a filter tank. In an unpressurized version of the filter, the level of water to be filtered in the tank is controlled so as to normally not flow over an annular trough inside wall located at the top of the tank. The inside wall of the trough thereby acting as a weir extending around the inner perimeter of the annular trough to be able to receive oil flowing over the weir. When a predetermined oil accumulation atop the water is detected by an interface detector, the water level in the tank is increased sufficiently so that the oil be high enough to pass over the weir and into the annular trough. The collected oil is thereafter drained out of the annular trough as by gravity into a vessel. In a pressurized version of the filter, the integrated oil skimmer has an open bottomed chamber located at the top of the filter tank which is open to the pressurized water and oil in the tank and thereby receives the oil accumulating atop the water in the tank. The oil accumulating in the chamber is periodically discharged out of the chamber by the pressure in the tank when an automatic vent valve is opened when oil accumulates in the chamber to a predetermined level detected by an interface detector, and closed after the oil is discharged from the chamber.

A deep media bed filter is combined with an oil skimmer integrated into the filter, the oil skimmer including an arrangement for collecting oil floating on the water to be filtered in a filter tank. In an unpressurized version of the filter, the level of water to be filtered in the tank is controlled so as to normally not flow over an annular trough inside wall located at the top of the tank. The inside wall of the trough thereby acting as a weir extending around the inner perimeter of the annular trough to be able to receive oil flowing over the weir. When a predetermined oil accumulation atop the water is detected by an interface detector, the water level in the tank is increased sufficiently so that the oil be high enough to pass over the weir and into the annular trough. The collected oil is thereafter drained out of the annular trough as by gravity into a vessel. In a pressurized version of the filter, the integrated oil skimmer has an open bottomed chamber located at the top of the filter tank which is open to the pressurized water and oil in the tank and thereby receives the oil accumulating atop the water in the tank. The oil accumulating in the chamber is periodically discharged out of the chamber by the pressure in the tank when an automatic vent valve is opened when oil accumulates in the chamber to a predetermined level detected by an interface detector, and closed after the oil is discharged from the chamber.

The present invention relates to a multistage fiber filtering apparatus capable of selectively filtering depending on turbidity of raw water, in which a first filtration mode where the raw water passes through a fiber ball medium, a second filtration mode where the raw water passes through a fiber yarn medium, or a third filtration mode where the raw water passes through both of the fiber yarn medium and the fiber ball medium may be selectively operated.

The present invention relates to a multistage fiber filtering apparatus capable of selectively filtering depending on turbidity of raw water, in which a first filtration mode where the raw water passes through a fiber ball medium, a second filtration mode where the raw water passes through a fiber yarn medium, or a third filtration mode where the raw water passes through both of the fiber yarn medium and the fiber ball medium may be selectively operated.

In a gravity filtration system, upper and lower fluid reservoirs may be mated together. Unfiltered fluid may be supplied to the upper reservoir. One or more filters provide fluid communication between the upper and lower fluid reservoirs. Fluid may pass through the filters into the lower fluid reservoir. The weight of the fluid in the gravity filtration system may be monitored to maximize the fluid flow rate without loss of fluid by supporting the fluid reservoirs on a moveable platform interconnected to a stationary base by a force reactive linkage. Automatic fill components may be provided for automatically actuating a fluid supply valve connected to an unfiltered fluid source. As filtered fluid is withdrawn from the lower reservoir, actuation of the fluid supply valve to an open position may permit unfiltered fluid to be supplied to the upper reservoir. Supply of unfiltered fluid to the upper reservoir may be stopped upon actuation of the fluid supply valve to the closed position. Actuation of the fluid supply valve is a function of the weight of the fluid in the filtration system and/or vertical travel of the moveable platform.

A method of applying a pattern formed of two different materials to a pattern support layer includes: providing a die form having a surface with recesses defining the pattern; applying a first curable material to a surface first region, received in some of the first region recesses and partially filling a first region recess set; applying a second curable material to some of the surface first region, the second curable material at least partially fills the first set of the first region recesses; contacting a pattern support layer with the die form surface to cover the recesses containing both the first and second curable materials; separating the pattern support layer from the die form surface, the first and second curable materials in the covered recesses removed therefrom and retained on the pattern support layer; and curing the first and second curable materials during and/or after the second and third steps.

A method of applying a pattern formed of two different materials to a pattern support layer includes: providing a die form having a surface with recesses defining the pattern; applying a first curable material to a surface first region, received in some of the first region recesses and partially filling a first region recess set; applying a second curable material to some of the surface first region, the second curable material at least partially fills the first set of the first region recesses; contacting a pattern support layer with the die form surface to cover the recesses containing both the first and second curable materials; separating the pattern support layer from the die form surface, the first and second curable materials in the covered recesses removed therefrom and retained on the pattern support layer; and curing the first and second curable materials during and/or after the second and third steps.