公开(公告)号：US5240540A

公开(公告)日：1993-08-31

申请号：US645983

申请日：1991-01-23

申请人： Noriya Matsumoto ,  Yoshihiko Oya ,  Hajime Akado ,  Yoshihiro Taki ,  Kazumi Nonoyama ,  Takanari Okumura

发明人： Noriya Matsumoto ,  Yoshihiko Oya ,  Hajime Akado ,  Yoshihiro Taki ,  Kazumi Nonoyama ,  Takanari Okumura

IPC分类号： B01D29/07 ,  B01D25/00 ,  B01D29/11 ,  B01D46/00 ,  B29C65/48 ,  B31D3/02

CPC分类号： B01D25/001 ,  B01D29/111 ,  B01D2201/46 ,  B29C65/4815 ,  B29C66/1312 ,  B29C66/438 ,  B29K2101/12 ,  B29K2105/0854 ,  B29K2313/00 ,  B29L2031/14 ,  B29L2031/602 ,  Y10T156/1056 ,  Y10T156/1057 ,  Y10T156/109

摘要： A method for producing a filter element has three steps. In first step, a filter body including at least one first passageway and at least one second passageway or clearance extends closely and substantially parallel to the first passageway and communicate with first hole through a filter material is formed. In second step, a sheet-shaped thermoplastic adhesive is arranged on one end of the filter body, the first passageway and the second passageway or clearance are open at the one end of the filter body. In third step, the sheet-shaped thermoplastic adhesive is melted by heating to close and seal an end of the second passageway or clearance at the one end of the filter body so that the passageways do not deform.