referring to fig1 shaving razor 10 includes handle 12 and replaceable shaving cartridge 14 . cartridge 14 includes molded plastic housing 16 , which carries three blades 18 , guard 20 and cap 22 . cartridge 14 also includes plastic interconnect member 24 on which housing 16 is pivotally mounted . interconnect member 24 removably and fixedly attaches to handle 12 and has two arms 26 that pivotally support housing 16 at its two sides . cartridge 14 is shown in its spring - biased , upward position in fig1 . referring to fig2 housing 16 of cartridge 14 has inwardly facing slots 28 in side walls 30 for receiving the ends of base portions 32 of blades 18 . housing 16 also has respective pairs of resilient arms 36 on which each blade 18 is resiliently supported . blades 18 are located in a substantially unobstructed region 38 between side walls 30 to provide for ease of rinsing of the cartridge during use . cap 22 provides a lubricous shaving aid and is received in slot 40 at the rear of housing 16 . cap 22 may be made of a material comprising a mixture of a hydrophobic material and a water leachable hydrophilic polymer material , as is known in the art and is described , e . g ., in u . s . pat . nos . 5 , 113 , 585 and 5 , 454 , 164 , which are hereby incorporated by reference . guard 20 includes a finned elastomeric unit molded on the front of housing 16 to engage and stretch the user &# 39 ; s skin ; other skin engaging protrusions , e . g ., as described in u . s . pat . no . 5 , 191 , 712 , which is hereby incorporated by reference , can be used . metal clips 42 are secured at the respective sides of housing 16 inside of raised edges 44 of side walls 30 in order to retain blades 18 within housing 16 and to locate the cutting edges of spring - biased blades 18 at a desired exposure when in the at - rest position . clips 42 also wrap around the bottom of housing 16 and prevent the removal of the ends of arms 26 of interconnect member 24 . clips 42 are made of 0 . 018 &# 34 ; thick aluminum material , which is thicker than the material used in the clips of the blade unit of the commercial embodiment of the type of design described in the above - mentioned u . s . pat . no . 4 , 378 , 634 . in addition , the arms of the clips that are bent around the bottom of housing 16 are both longer than those employed in the commercial embodiment of the type of design described in the above - mentioned patent , because there are three blades ( instead of two ) and the housing thus is wider . the thicker material and the longer arms to be bent cause the arms to tend to elastically return to a larger extent after forces bending the clips around the housing have been released . housing 16 includes certain features ( described below ) to maintain the thicker , longer clips in a desired final position . referring to fig3 it is seen that the end portions 50 of clips 42 have notches 52 that are aligned with notch posts 54 ( see also fig4 ) of housing 14 . it is also seen that housing 16 has wedge portions 56 that extend in from raised edges 44 and have angled surfaces 58 that contact angled surfaces 60 of end portions 50 of clips 42 . wedge portions 56 ( see also fig4 ) and the contacting surfaces 60 of clips 42 make an interference fit in order to help retain the ends of clips 42 on housing 16 . referring to fig4 and 5 , it is seen that housing 16 has fulcrums 62 that extend outward beyond the adjacent surface portions of housing 16 on both sides of fulcrums 62 . as shown in fig5 fulcrums 62 have a semicircular cross - section and therefore are tapered and have a blunt upper surface . in manufacture , blades 18 are located on housing 16 by inserting the ends of base portions 32 in slots 28 and depressing the blades downward against resilient arms 36 . prior to assembly , retaining clips 42 are u - shaped , and the portion of the u that joins the two legs has the same contour as the upper portion of housing 16 within raised edges 44 . the upper portions of the preassembled clips 42 thus have the same shape of the upper portions of clips 42 as shown in fig2 . prior to assembly , the two legs of the u - shaped clip ( which legs correspond to portions 66 , 68 in fig2 ) are directed straight downward and parallel to each other , and leg 66 is shorter than leg 68 . the clip / housing / blade assembly ( with the upper portion of clips 42 seated on housing 16 inside of raised edges 44 ) is directed downward against forming die 100 shown in fig6 . surfaces 102 , 104 of die 100 deflect legs 66 and 68 inward as the housing / blade / clip assembly is brought closer to die 100 . this causes the legs 66 , 68 of clip 42 to initially bend around the bottom of housing 16 to the position shown in fig7 . at this stage in the forming process , the end portions 50 of legs 66 , 68 have just made initial contact with fulcrums 62 . ( in fig7 - 10 , the base portions 32 of blades 18 and the ends of arms 26 are not shown on housing 16 , though they are present during these stages of the manufacturing process and in the final assembly .) referring to fig8 with further advancement of the housing / blade / clip assembly toward die 100 , the end portions 50 of the clips 42 tend to bend around fulcrums 62 at regions nearby notches 52 where clips 42 are thinner . simultaneously with bending of clips 42 around fulcrums 62 , fulcrums 62 begin to be crushed from the resulting forces , and the crushed material of fulcrums 62 is directed toward recess 72 . at the same time , angled surfaces 60 of clips 42 move past angled surfaces 58 of wedge portions 56 ( fig3 ), and notches 52 begin to pass over notch posts 54 ( fig3 ). referring to fig9 further advancement of the housing / blade / clip assembly toward the forming die causes the ends 70 of the clips to contact the bottom of recess 72 of housing 16 in the position of their most deflected travel . at this point , fulcrums 62 have been crushed flat , with displaced material in recess 72 , and ends 50 have been permanently bent beyond the elastic limit of the clip material at the regions of the clips overlying fulcrums 62 . at the same time , angled surfaces 60 of clips 42 travel further over angled surfaces 58 of wedge portions 56 ( fig3 ), and the tops of wedge portions 56 are deformed ( i . e ., swaged ) by projection 106 of forming die 100 , causing displaced wedge material to slightly overly the ends of clips 42 and to create an interference fit that exerts a normal spring force against wedge portions 56 . when the housing / blade / clip assembly is removed from forming die 100 , the ends 50 tend to elastically return slightly to the position shown in fig1 and 11 , though such movement is inhibited by the swaged plastic of wedges 56 . the interference fit between angled clip surfaces 60 and angled wedge surfaces 58 and the overlying swaged material ( as shown in fig1 ) tend to hold the ends of the clips 42 in place and to inhibit them from moving outward from housing 16 . also , notches 52 of clips 42 receive notch posts 54 , causing end portions 50 of clips 42 to be captured between projections 42 and wedge portion surfaces 58 and to inhibit clip 42 from opening up during use , e . g ., when the cartridge is subjected to excessive forces as might arise when the cartridge is dropped .