Method of making a gas phase permeable filter
AssigneeD-Mark, Inc.
InventorsJames W. Kasmark, Jr., Myron L. Dooley, Arthur H. Jones
Life of this patent
Estimating the term…
Abstract
Described is a gas phase permeable filter and method for making same comprising the steps: 1. providing a gas phase permeable substrate having opposite surfaces; 2. applying an adhesive to one or both of the surfaces of the substrate; 3. applying particulate gas phase odor-removing means to the adhesive coated surface or surfaces of the substrate; 4. drying the adhesive; and 5. assembling the substrate in a desired filter configuration wherein the outer surface of the filter is a surface of the substrate free of particulate gas phase odor-removing means and the inner surface of the filter is a surface of the substrate coated with the particulate gas phase odor-removing means adhesively secured thereto.
Claims2
The method of making an odor removing thin bed filter comprising the steps:
- (1) providing a self supporting perforated sheet-like substrate having opposite faces and discrete perforations extending through the substrate and opening through the faces with the substrate having a width substantially equal to the width of the filters to be formed and a length sufficient to form several filters;
- (2) cutting such substrate into successive equal lengths, each substantially equal to the length of each filter to be formed;
- (3) depositing the cut lengths successively on a moving conveyor belt with one face disposed upwardly and the other lying on the belt to transport the cut lengths through a series of work performing stations;
- (4) at a first station, roll-coating the upwardly disposed face of each of the successive lengths of substrate with an adhesive without seepage of the adhesive through the perforations to the other face;
- (5) at a second station, tackifying the adhesive coating sufficiently to prevent any appreciable capillation into the odor removing particles to be subsequently applied;
- (6) at a third station and before the adhesive hardens preventing odor removing particles from settling into it, applying a uniform layer of such particles ranging in size from approximately 12/28 to 4/6 measured by the Tyler screen series to the upwardly disposed face of the substrate on top of the tackified adhesive coating with the particles settling into the coating;
- (7) while continuing to transport the cut lengths on the conveyor, curing the adhesive to a condition retaining the particles;
- (8) removing the successive lengths of coated substrates from the conveyor and removing unadhered particles therefrom;
- (9) assembling two such coated substrates with the coated faces in opposing abutting contact;
- and
- (10) securing a peripheral frame around and to the thus assembled pair of substrates to integrate them into a filter structure.
Dependencies are inferred from the claim text.