Filter cartridge; components thereof; and methods
An air filter cartridge includes a coiled media pack with inlet flutes and outlet flutes. The coiled media pack has first and second rounded ends with at least a first straight side and a second side. The coiled media pack has: (i) a length extending along a straight line from a center of the first rounded end to a center of the second rounded end; (ii) a first width between the first straight side and second side; the first width being perpendicular to the length; and (iii) a second width thereacross; the second width being perpendicular to the length. The first width is narrower than the second width.
1. An air filter cartridge comprising:
(a) a coiled media pack having a first flow face and a second flow face which is opposite of the first flow face; the coiled media pack including:
(i) a set of inlet flutes open at the first flow face to passage of air to be filtered therein;
(ii) a set of outlet flutes open at the second flow face;
(iii) the coiled media pack being closed to flow of unfiltered air into the first flow face and then outwardly from the second flow face without filtering;
(b) the coiled media pack having first and second rounded ends with at least a first straight side and a second side in complete extension therebetween;
(i) the coiled media pack having a length extending along a straight line from a center of the first rounded end to a center of the second rounded end;
(i) the coiled media pack having a first width between the first straight side and second side; the first width being perpendicular to the length;
(ii) the coiled media pack having a second width thereacross; the second width being perpendicular to the length; and
(iii) wherein the first width is narrower than the second width.
2. An air filter cartridge according to claim 1 further comprising:
a non-circular core; the coiled media pack being wound around the non-circular core.
3. An air filter cartridge according to claim 2 wherein:
the non-circular core is generally sector-shaped.
4. An air filter cartridge according to claim 1 wherein:
the first flow face is planar.
5. An air filter cartridge according to claim 1 wherein:
the coiled media pack includes fluted sheet secured to a facing sheet.
6. An air filter cartridge according to claim 1 further comprising:
a wedge-shaped core; the coiled media pack being wound around the wedge-shaped core.
7. An air filter cartridge according to claim 1 wherein:
the first flow face and second flow face are planar.
8. An air filter cartridge according to claim 1 wherein:
the coiled media pack has a third width thereacross extending between two sides of one of the first rounded end or the second rounded end; the third width being perpendicular to the length; and
wherein the third width is narrower than the first width.
9. An air filter cartridge according to claim 1 wherein:
the second side is a straight side in complete extension between the first and second rounded ends.