Liquid purification or separation – Filter – Supported – shaped or superimposed formed mediums
Patent
1992-08-10
1994-03-01
Dawson, Robert A.
Liquid purification or separation
Filter
Supported, shaped or superimposed formed mediums
2104933, 2104935, 55475, 55500, 55521, B01D 2706
Patent
active
052904474
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
The invention relates to a filter insert having a blocked shape configuration.
A filter insert disclosed in U.S. Pat. No. 3,531,920 has a block shape and is composed of a filter element that is pleated in a zigzag pattern. Mutually parallel dimples project from the pleat walls, with the dimples projecting from the plane of the pleat walls on both sides of the pleat walls and the dimples of adjacent pleat walls lying against one another at their contacting faces. Each one of the dimples extending perpendicularly to the edges of the zigzag pleats forming the crease has a height that gradually increases and decreases in the direction of movement of the medium and a width that increases in the direction of increasing height. Each pair of dimples that are adjacent within the pleat wall extend in mutually opposite directions with respect to the plane of the pleat wall; they are thus embossed to be raised and recessed, respectively.
The dimples are here arranged in such a way that each raised dimple in the pleat wall has an associated likewise raised, embossed dimple in the adjacent pleat wall in such a way that the zigzag pleat causes the associated dimples to lie on top of one another and to support one another in the region of their contacting faces.
In this way a space is ensured between the adjacent pleat walls which uniformly decreases in the direction of movement of the medium and uniformly increases after passage of the medium through the wall.
The drawback is here that the width of the dimples increases and decreases in the direction of movement of the medium so that the direction of flow of the medium to be filtered is deflected laterally. This increases flow resistance and requires greater conveying power for the medium to be filtered. With the increasing width of the dimples, the surface area available in the region of the wall for passage of the medium to be filtered is also reduced.
Moreover, the width of a channel for the medium formed between two adjacent dimples increases in the direction of movement of the medium. The change in cross section caused thereby additionally increases flow resistance in an undesirable manner. In order, to make the filtering of large quantities of a medium economically feasible, the energy to be made available for the filtering process should be as low as possible, particularly since the corresponding drive means generate more noise with increasing power.
SUMMARY OF THE INVENTION
It is an object of the invention to reduce the flow resistance as much as possible in a filter insert of the above mentioned type, with high stability of the arrangement being ensured in spite of a simple configuration.
This is accomplished by a filter insert having a block-shaped configuration, comprising:
a planar material which is permeable to a medium and is arranged as a plurality of pleats having pleat walls, each pleat wall defining a plane and having opposing first and second edges, the pleat walls being arranged in a zigzag pattern presenting first and second edge sections wherein a medium to be filtered passes through the filter insert in a direction from the first edge section toward the second edge section, the pleat walls having embossed projections which are parallel to one another and project with a height with respect to the plane of the pleat wall an in a direction toward an adjacent pleat wall, the projections having a length in a direction from one edge to the opposite edge of a respective pleat wall and a width perpendicular to the length, the width being essentially constant over the entire length, and the length exceeding the width, wherein adjacent projection of adjacent pleat walls contact one another for securing, spacing and stiffening the pleats and the filter insert, and the planar material is further arranged so the first edges of every other pair of adjacent pleat walls and the second edges of a different every other pair of adjacent pleat walls are connected to one another by respective planar intermediate regions of the filter mat
REFERENCES:
patent: 3531920 (1970-10-01), Hart
patent: 3799354 (1974-03-01), Buckman et al.
patent: 3849314 (1974-11-01), Niccum et al.
patent: 4268290 (1981-05-01), Barrington
patent: 5028331 (1991-07-01), Lippold
patent: 5053131 (1991-10-01), Lippold
patent: 5066400 (1991-11-01), Rocklitz et al.
patent: 5071555 (1991-12-01), Enbom
Dawson Robert A.
Walker W. L.
LandOfFree
Block-shaped pleated filter insert does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Block-shaped pleated filter insert, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Block-shaped pleated filter insert will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-574239