| 摘要 |
A core for filter element is provided to need no separate sealing, to reduce number of components and to save cost by making a top cap and a bottom cap using paper material and forming ceiling on a central part. A core for filter element is admitted to an inner side of a filtration part in order to support the filtration part(10) of the filter. Core sheet(22) in which a plurality of penetration holes(21) are formed by winding and overlapping many times the core sheet. A plurality of penetration holes are arranged in order to be connected at a state that the core sheet is wound. A hollow(24) is formed inside the rolled core sheet.
|
