Nonwoven layer for a filter and filter medium

Details Nonwoven layer for a filter and filter medium Nonwoven layer for a filter and filter medium

2003-12-08

2011-12-20

Greene, Jason M (Department: 1776)

Gas separation

Flexible or collapsible bag type

Seaming, reinforcing or bag structure

C055S382000, C055S482000, C055S486000

Reexamination Certificate

active

08080076

ABSTRACT:
The invention is directed to a nonwoven layer for a filter, in particular, for a vacuum cleaner bag, wherein at least one region of the nonwoven layer, the region having a predetermined thickness and a predetermined area, has an average pore size smaller than 50 μm and comprises fibers being bonded together such that a movement of the fibers relative to each other in a direction parallel to the surface of the layer is inhibited. The invention is further directed to a filter medium, in particular, for a vacuum cleaner bag, comprising a filter structure wherein a surface or an interface of the filter structure is provided with a filter paper layer having a smaller surface area than the filter structure.

REFERENCES:
patent: 2792076 (1957-05-01), Meyerhoefer
patent: 2848062 (1958-08-01), Meyerhoefer
patent: 3498031 (1970-03-01), Fesco
patent: 4663222 (1987-05-01), Ohue et al.
patent: 4877526 (1989-10-01), Johnson et al.
patent: 4941309 (1990-07-01), Fluent et al.
patent: 5203061 (1993-04-01), Hamada
patent: 5206061 (1993-04-01), Ando et al.
patent: 5707468 (1998-01-01), Arnold et al.
patent: 5855992 (1999-01-01), Etzold
patent: 6193773 (2001-02-01), Schlör et al.
patent: 6425978 (2002-07-01), Diehl et al.
patent: 2008/0011034 (2008-01-01), Hochrein et al.
patent: 0 338 479 (1989-04-01), None
patent: 0 960 645 (1999-12-01), None
patent: WO 93/21812 (1993-11-01), None
patent: WO 01/12427 (2001-02-01), None
Karger-Kocsis, J. (1999). Polypropylene—An A-Z Reference. (pp. 301-303). Springer-Verlag.
Subhash Chand, Gajanan S. Bhat, Joseph E. Spruiell, Sanjiv Malkan. Structure and properties of polypropylene fibers during thermal bonding—Thermochimica Acta 367-368 (2001) 155-160.
Ward (Micro Denier Nonwoven Process and Fabrics) 1998.
Webster's Third New International Dictionary, Unabridged, 1993.
International Search Report Dated Apr. 28, 2004.

Affiliated with

Also associated with

Rating

Nonwoven layer for a filter and filter medium does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Nonwoven layer for a filter and filter medium, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Nonwoven layer for a filter and filter medium will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-4315856