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US 6,197,079 B1Granted
Pleated air filter and method for producing same
AssigneeBridgeston Corporation
InventorsHisashi Mori, Masami Aoki
Life of this patent
Estimating the term…
Abstract
An air filter suitably usable in an air cleaner, room air-conditioner or especially in car air-conditioners in which air is driven at a high speed. The air filter is made of a pleated polyurethane foam having on one or both sides thereof a three-dimensional network skeletal structure of micro cells.
Claims14
A method for producing an air filter, comprising the steps of:
- providing a polyurethane foam sheet having a three-dimensional porous network skeletal structure of micro cells;
- heating said polyurethane foam sheet;
- compressing said polyurethane foam sheet to form a pleated structure;
- cooling said pleated structure while maintaining said step of compressing of said polyurethane foam sheet.
1 more element
An air filter, comprising:
- a polyurethane foam sheet having a three-dimensional porous network skeletal structure of micro cells;
- a dust filter layer in laminated engagement with at least one side of said polyurethane foam sheet, said dust filter layer comprising a non-woven, porous material made of an electrified fabric of polypropylene;
- and
- a combination of said polyurethane foam sheet and said dust filter layer comprising a filter matrix, said filter matrix having a pleated configuration.
1 more element
Dependencies are inferred from the claim text.