US 12,311,296 B2
Melt-blown depth filter element and method of making it
Travis Gerald Stifter, Minnetonka, MN (US); and Thomas Martin Aune, Minnetonka, MN (US)
Assigned to BL TECHNOLOGIES, INC., Minnetonka, MN (US)
Filed by BL Technologies, Inc., Minnetonka, MN (US)
Filed on Jan. 28, 2022, as Appl. No. 17/587,519.
Application 17/587,519 is a division of application No. 15/549,446, granted, now 11,266,936, previously published as PCT/US2016/025758, filed on Apr. 1, 2016.
Claims priority of provisional application 62/153,641, filed on Apr. 28, 2015.
Prior Publication US 2022/0152535 A1, May 19, 2022
Int. Cl. B01D 39/00 (2006.01); B01D 39/16 (2006.01); D01D 5/00 (2006.01)
CPC B01D 39/163 (2013.01) [B01D 39/1623 (2013.01); B01D 2239/0622 (2013.01); B01D 2239/065 (2013.01); B01D 2239/10 (2013.01)] 13 Claims
OG exemplary drawing
 
1. A machine for making a depth filter element comprising,
a rotatable mandrel;
one or more fixed nozzles configured to spray melt spun filaments towards the mandrel,
a press roller, and
a nozzle assembly, wherein the nozzle assembly moves with compound motion relative to the mandrel.