1. A shaving blade unit comprising:
a housing having a top surface, a bottom surface, a front edge, a rear edge and a pair of side edges extending between the front edge and the rear edge, the housing having a pair of apertures between the front edge and the rear edge and extending through the housing from the top surface to the bottom surface;
at least one blade disposed between the front edge and the rear edge, the one or more shaving blades each having a cutting edge; and
a clip having a pair of legs extending through the pair of apertures, wherein each leg is bent about at least a portion of the bottom surface of the housing securing the clip to the housing and retaining the blade on the housing.
2. The shaving blade unit of claim 1, wherein the clip has a thickness of about 0.3 mm.
3. The shaving blade unit of claim 2, wherein the clip comprises aluminum.
4. The shaving blade unit of claim 1, wherein the blade is spring-biased and the clip locates the cutting edge of the blade at a desired exposure in a rest position.
5. The shaving blade unit of claim 1, wherein each of the legs has a straight portion.
6. The shaving blade unit of claim 1, wherein each of the legs has multiple bent portions.
7. The shaving blade unit of claim 6, wherein the multiple bent portions have a relatively short bend radius.
8. The shaving blade unit of claim 1, wherein each of the legs is bent to a curvature greater than 90 degrees.
9. The shaving blade unit of claim 9, wherein each of the legs has a bent portion defining a respective curvature.
10. The shaving blade unit of claim 1, wherein each leg is bent such that the clip generally corresponds to a shape of the housing.
11. The shaving blade unit of claim 10, wherein each leg is bent beyond its elastic limit.
12. The shaving blade unit of claim 10, wherein each leg is over bent to preload the clip against the housing.
13. The shaving blade unit of claim 1 wherein the clip is in electrical contact with the one or more shaving blades so as to form an anode-cathode cell in which the clip functions as a sacrificial anode that corrodes and the one or more shaving blades function as a cathode that is protected from corrosion.
14. The shaving blade unit of claim 1 wherein a plurality of blades are disposed between the front edge and the rear edge and each of the blades has a cutting edge.
15. The shaving blade unit of claim 14 wherein the clip retains the plurality of blades on the housing.
16. The shaving blade unit of claim 14 wherein five blades are disposed between the front edge and the rear edge and each of the blades has a cutting edge.
17. The shaving blade unit of claim 16 wherein the clip retains the five blades on the housing.
18. The shaving blade unit of claim 14 wherein the apertures are slots.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. A method for treating a perchlorate ion-containing liquid, comprising:
an adsorption step for bringing the perchlorate ion-containing liquid into contact with a weak base anion exchange resin, so that perchlorate ions are adsorbed to the weak base anion exchange resin; and
a removing step for bringing an acid into contact with the weak base anion exchange resin to which the perchlorate ions are adsorbed, so as to remove the perchlorate ions from the weak base anion exchange resin.
2. The method as set forth in claim 1, wherein the weak base anion exchange resin is such that a ratio of a neutral salt splitting capacity to a total exchange capacity is not less than 0 but not more than 40%.
3. The method as set forth in claim 1, wherein the acid is sulfuric acid or hydrochloric acid.
4. The method as set forth in claim 1, wherein the acid has such a concentration of 1n molL or more, where n is a valence of the acid.
5. The method as set forth in claim 1, wherein, before being treated, the perchlorate ion-containing liquid has a perchlorate ion concentration of not less than 10 \u03bcgL but not more than 1000 mgL.
6. The method as set fort in claim 1, wherein in the removing step the acid heated to a temperature of not lower than 20\xb0 C. but not higher than 80\xb0 C. is brought into contact with the weak base anion exchange resin.
7. The method as set forth in claim 1, wherein the weak base anion exchange resin is repeatedly used in such a manner that the perchlorate ions are removed from the weak base anion exchange resin by bringing the acid in contact with the weak base anion exchange resin to which the perchlorate ions are adsorbed, and then the weak base anion exchange resin is used again to adsorb the perchlorate ions thereto.
8. A method for removing perchlorate ions, comprising:
bringing an acid into contact with a weak base anion exchange resin to which perchlorate ions are adsorbed, so as to remove the perchlorate ions from the weak base anion exchange resin, in order to regain an adsorption ability of the weak base anion exchange resin.