|국가/구분||United States(US) Patent 등록|
|국제특허분류(IPC7판)||B01D-029/02 B01D-035/18 B01D-033/32|
|미국특허분류(USC)||210/774 ; 210/780 ; 210/184 ; 210/401|
|발명자 / 주소|
|인용정보||피인용 횟수 : 2 인용 특허 : 4|
A process and apparatus for filtering a polymer which passes through a heated, high pressure filtering chamber across which a filter members passes and in which sealing plugs made of the substance being filtered are formed within entry and exit zones thereof. A plug removal zone is provided between the entry port for said filter and the outflow aperture of the filtering chamber. The zone is provided with a valve to permit removal of sealing plug material when in a heat-softened state. A cooled, substantially rigid plug of polymer is formed initially. The...
In a filtering process in which a filter is moved through an inlet port into a filtering passage containing a substance which is passed through the filter and the inlet port is sealed by a plug of the substance being filtered by controlling the temperature conditions in the inlet port, the improvement comprising, heating the substance which occupies that part of the inlet port adjacent the filtering passage so as to be substantially fully molten thereby providing melt homogeneity before passing into the passage upon movement of the filter, while sealing ...