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US 4,048,073 AGranted
Filter bed assembly
AssigneeHelix Technology Corporation
InventorLawrence J. Rose
Life of this patent
Estimating the term…
Abstract
A filter-bed assembly comprises two adjacent beds each including adsorbent materials held between perforate sheets. The perforate sheets form the sides of the beds and have upstanding pleats therein to add rigidity thereto and to serve as spacers between the beds. Some of the pleats extend into the adsorbent material, and others of the pleats extend away from the adsorbent material toward the adjacent bed.
Claims9
A filter bed assembly having a bed comprising:
- a frame for defining a space through which fluid to be filtered flows;
- an adsorbent material held between parallel perforate sheets, the perforate sheets being attached along perimeter edges thereof to said frame and having open spans extending across said space, each of the perforate sheets having a plurality of folded pleats extending across said open spans of the perforate sheets said pleats rising substantially perpendicularly outwardly from the remainder of said perforate sheets, the pleats in a first of said perforate sheets rising into said adsorbent material.
A filter bed assembly comprising:
- a frame for defining a space through which fluids to be filtered flow;
- first and second separate beds positioned in said space, said first and second separate beds each including an adsorbent material held between first and second parallel perforate sheets, said perforate sheets being attached along outer edges thereof to said frame, said first perforate sheets having first folded pleats therein, said first folded pleats extending approximately perpendicular to the plane of said first perforate sheets into said adsorbent material, said second perforate sheet having second folded pleats formed therein, said second folded pleats extending substantially perpendicular to the plane of said second perforate sheets away from said adsorbent material;
- the perforate sheets of said first and second beds being attached to said frame to be parallel to one another with the respective second perforate sheets being adjacent one another but spaced from one another a distance approximately equal to the lengths of said second folded pleats, said second folded pleats contacting the second perforate sheets of the other respective beds to maintain said spacing.
Dependencies are inferred from the claim text.