Filtration device and process for its manufacture
AssigneeValeo
InventorsRichard Guerin, Claude Legrand
Life of this patent
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Abstract
Disclosed is a process for manufacturing a filtration device. The process includes a fibre carding procedure which forms a web. The filtration device in accordance with the invention takes the form of a web having a single layer lap.
Claims20
A process for manufacturing a gas filter comprising:
- carding fibers having a length in the range 38 mm to 120 mm and a diameter greater than about 10 μm to form an isotropic web;
- binding the web by passing very fine water jets at a high pressure through the web disposed on a rotating drum followed by a drying operation;
- and
- forming a filter from the web having a specific gravity lower than 0.12.
A filtration device for filtering gases such as air for ventilating, heating or air conditioning rooms or motor vehicles manufactured by the process comprising:
- carding fibers having a length in the range 38 mm to 120 mm and a diameter greater than about 10 μm to form an isotropic web;
- binding the web by passing very fine water jets at a high pressure through the web disposed on a rotating drum followed by a drying operation;
- and
- forming a filter from the web having specific gravity lower than 0.12.
A process for manufacturing a gas filter comprising:
- carding fibers to form an isotropic web;
- and
- binding the web by passing very fine water jets at a high pressure through the web disposed on a rotating drum followed by a drying operation;
- and
- forming a filter from the web having a specific gravity lower than 0.12.
A filtration device for filtering gases such as air for ventilating, heating or air conditioning rooms or motor vehicles manufactured by the process comprising:
- carding fibers to form an isotropic web;
- and
- binding the web by passing very fine water jets at a high pressure through the web disposed on a rotating drum followed by a drying operation;
- and forming a filter from the web having a specific gravity lower than 0.12.
Dependencies are inferred from the claim text.