Air filter
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United States of America Patent
Stats
-
Aug 5, 2003
Grant Date -
N/A
app pub date -
Dec 10, 1999
filing date -
Mar 26, 1997
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A method of making an air filter insert for cleaning the combustion air of an internal combustion engine. The method includes producing the filter insert (21) from a pleated filter medium (33) which is formed into a hollow cylinder, in which at least one end plate (33, 34) made of thermoplastic elastomer or thermoplastic polyurethane is disposed on the axial end faces of the filter medium (33). The at least one end plate (33, 34) is bonded to the cylindrical filter medium (33) by heating the filter medium or the end plate (33, 34) with a high-temperature heating element and fusing the filter medium (33) and the end plate (33, 34) to form a welded joint.
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