公开(公告)号：US20240041103A1

公开(公告)日：2024-02-08

申请号：US18256833

申请日：2021-12-08

申请人： FILTRONA DEVELOPMENT CO. PTE. LTD.

发明人： Rosi Ana QOLBI ,  Sudirman WIDIARTO ,  Areif RAHMAN ,  Hendra Kresa WIJAYA ,  . GIYANTO ,  . WURYANTO ,  . FERIANTO

IPC分类号： A24D3/02 ,  A24D3/06 ,  A24D3/04

CPC分类号： A24D3/0216 ,  A24D3/0233 ,  A24D3/0254 ,  A24D3/061 ,  A24D3/048

摘要： There is disclosed a method for making a filter element comprising the steps of: advancing two or more sheets of filtering material in a longitudinal direction; separating the two or more sheets of longitudinally advancing filtering material; gathering the separated sheets of longitudinally advancing filtering material to form a partially gathered rod of filtering material having a longitudinally extending recess; inserting an additive release vessel into the longitudinally extending recess; gathering the filtering material around the additive release vessel to close the recess and thereby form a rod comprising a longitudinally extending core of filtering material and one or more additive release vessels.