公开(公告)号：US20030024872A1

公开(公告)日：2003-02-06

申请号：US10254713

申请日：2002-09-25

Applicant: PTI Advanced Filtration, Inc.

Inventor： Tom Muzik ,  Kevin Knebel ,  Alex Vinarov

IPC: B01D027/06

CPC classification number: B01D46/522 ,  B01D27/06 ,  B01D29/21 ,  B01D29/232 ,  B01D46/0031 ,  B01D46/2411 ,  B01D46/523 ,  B01D2201/12 ,  B01D2201/122 ,  B01D2275/10

Abstract: The present invention relates to a novel filter element having a septum with a staged pleating that repeats a pleating sequence having a major (longest) pleat, a minor (shortest) pleat and at least one intermediate pleat therebetween. The intermediate pleat(s) have pleat heights that are evenly distributed within the range of pleat heights bounded by the pleat height of the minor pleat and the pleat height of the major pleat. In two particular embodiments of the invention, the pleat height ratios of the major, intermediate and minor pleats are 3:2:1 and 4:3:2:1. In an filter element, the pleated septum may be held between an inner core and an outer guard. The tip of the major pleat in each pleating sequence may be in contact with the inner core of the filter element. The septum may also include drainage layers on upstream and downstream of the filter material layer.

Abstract translation: 本发明涉及一种具有隔膜的新型过滤元件，其具有重复具有主要（最长）褶皱，次要（最短）褶皱和其间的至少一个中间褶皱的褶皱序列的褶皱。 中间褶具有均匀分布在由小褶皱的褶皱高度和主褶皱的褶皱高度限定的褶皱高度的范围内的褶皱高度。 在本发明的两个具体实施方案中，主要，中间和次要褶皱的褶皱高度比为3:2:1和4:3:2:1。 在过滤元件中，打褶的隔膜可以保持在内芯和外护罩之间。 每个打褶顺序中的主褶皱的尖端可以与过滤元件的内芯接触。 隔膜还可以包括在过滤材料层的上游和下游的排水层。