CA2139582A1 - Flexible razor head with increased rinsability - Google Patents

Abstract

An integrally formed flexible razor head having a plurality of blade platforms separated by a corrugation, at least one blade having a cutting edge, and a plurality of blade retainers which are integrally formed with the blade platforms and extend to positions above and adjacent to the top surface of the blade. While the blade retainers are integrally formed with the other pieces of the flexible razor head, each blade retainer is discrete with respect to other blade retainers.

Description

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F~S--~B~9 RAZOR D 11~1~ INCR~:D RI~8 The present invontion ig direct~d to a flexible razor --~
head and, more particularly, to a one-pieco integrally form d, fl-xible razor hoad .k S BA~10~` OF T~ ~OII _.

Razor he~ds whieh are fl xible along their longitudlnal axo~ hav~ be n di~clog d in th- art Many o~
th -- razor h-ads r quire tho as-oobly of s-v ral s-p rat~
~; piec ~ such a~ a cap, a spac-r~ on or mor blad s and a b}ad- platfor~ Thig a~-- bly proc~ time consu~ing `- -and co~tly Furthor~oro~ tho r-quir-- nt that th-s- ~ ~
picc-s are manipulat d, ~ith~r m~nu~lly or automatically, ~-is g n-rally considored to plac~ r~triction- on t~e typ of materials whieh m~y b~ ug-d in thoir manufaetUre T~e -~
~aterials used must be sub~tantially rigid to withstand th a~n-~bly~prOc--~ whil- mooting the specifieation toleranee~ nec--~ary to proporly join with the other ---pi-c~ It would, therefore, b~ d~irablo to provide a fl~xibl~ razor h-ad having int-grally for~ d el-~ nts 20~ - whieh would th-r~fore eliminate the need for the as~- bly of a~nu~b~r ot el _ nt~

T~ pr~s-nt inv-ntion o~erco _ disad~antages of pr-viou~ly di~clos-d razlor headn by providing an 2S int grally for _ d rlexibl- razor head having a pluralitY
o~;bl d~platfor~$ ~-p~rat-d by corrugations, at l~a~t ono blad~h~ving a cutting ~dg , and a pluralitY Of bl~d~
r tain r~ which ar int~graIly ~or~ad with t~ bl~d plat~oro~ and ~xt-nd to po~ltlona abova and ad~-c-nt to 30~ th top ~urr~c Or tho upp r blad~ Whll- th bl~d r~taln rr aro intagr~lly ror~ d wlth tha oth pl Of ~':, ~: ` ' r~ ~ ~ ~-~

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213~82 - th- flexibl- razor h-ad, each blade retain-r is discr-t-with r-~poct to other blade retain-rs Ths integrally for~ d fl-xible razor h-ad of th- present invention, therefor-, do-s not have a continuous cap me~ber co~monly found in commercially available razor heads B~l~F D~8C~IYTlON OF ~ DRA~rNa8 Flgur 1 is a por~p-ct~v- vi-w of ono e~bodiment of a flexible razor h-ad of tho pr-sont invention ~ Figur- 2 is a ~id- vi-w of th razor h-ad shown in -~ 10 Figur~ 1 Figure 3 is a top, p rsp ctiv view of the razor h-ad shown in Figure 1 Figur 4 is à front viow of tho razor h-ad shown in Figure 1 - 15~ Figur- S is a rear view of the razor h-ad shown in Figura 1 Figur- 6 is a bottom, p-rspoctiv- view of the razor h-ad ~hown in Figur Flgure ~ is a top vi~w of a bottom blàde of the razor h-ad illustrated in Figure 1 Figura 8 is a top view of ~n upp-r blade of th- razor h ad shown in Fiquro 1 Figure 9 is a ~octlonal vl-w tak~n along lines 9-9 o~
Figur 3 ~ :
2S Flgur 10 is a croJ---action~l vl-w taX n along lin 10-10 Or Figur 3 213~82 F1gure 11 is a cros8-sectional view along llne 11 of Figure 4.

Figure 12 is a cross-sectional view of the upper portion of one embodiment of the razor head of the present invention illustrating a shaving aid receptacle.

Figure 13 is a cross-sectional view illustrating the - posit$oning o~ a shaving aid according to one embodiment of the present invention.

Figure 14 is a sectional view with portions remov~d illustrating the positioning of a shaving aid on a blade retainer according the one embodiment of the present invention.

Figure 15 is a perspective view of another e~bodiment of a flexible razor head of the present invention in which a shaving aid has been incorporated on the cap surface.

Figure 16 is a top plan view of tAe embodiment shown in Figure 15.

Figure 17 is a front elevation view of the embodiment shown in Figure 15.

Figure 18 is a rear elevation view of the embodiment shown in Figure 15.

Figure 19 is a perspective view of y~t another embodiment of a flexible razor head in accordanCe with the pres-nt invention.

Figure 20 is a cros8-sQction taken along lines 20-20 of the embodiment s~own in Figure 19.

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~:' " ' 2139~82 Figure 21 i9 an enlarged detail of the cross-s-ctional view shown in Figure 20 D~AIL~D DE8CRIp~QN

The present invention comprises an integrally-~olded, flexible razor head wh-rein all elem nts, except the blade or ~lades, are formed as a singlo piece The integral formation of the present flRxible razor head eliminate~
the time conguming and costly assembly steps necessary in the manufacture of flexible razor heads for~ed of separate piQc-s As de~cribed in further detail below, the flexible razor head of the pre9ent invention also provide~
controlled shaving goometry without the use of a continuous cap found in most commercially available razor heads As used herein, the term nrazor head~ is meant to inclùde cartridqes which are manufactured and typically marketed separate from razors, ag well as disposable razors which are formed with a handle and do not require the attach~ent of separate pieces by the consumer Figur- 1 illu~trat~ one preferred embodiment of the pre~nt invention wherein th~ fl~xible razor head 10 compris-s an upper blade 20, a lower blade 30, a plurality of discret- retaininq ~-mbers 40, quard members 50, and sid- supports 80 Fiqur- 2 is a sido view of th- flexible razor head illustrated in Figure 1 showing the side portion o~ side supports 80, a9 well as a side view of attachment neck 90 Th spacing betw n the di9cr~t~ retaining m~mb-rs 40 is shown in Figure 3, which is a top view of the e~bodiment of the pregent inveRtion illu~trat-d in Figur-1 T~is top view also provid-fi a cl~ar r vi-w of th~
r~lative positioning of cutting ~dg~ 21, 31 of upper blad 20 and lower bl~d~ 30, re~pectiv-ly Blad-retain rs 40 ovorlap upper bl~d~ 20, preferably oxt-nding 2139~8~

at least about 50~ and most preferably about 70% to about 90% of the distance from the rear edge of upper blade 20 to cutting edge 21. The retainer members 40 which are integrally formed with blade platform 70 and spacer 100 (Fig. 10) thereby maintain the vertical positioning of the blades.

According to one preferred e~bodiment illustrated in Figure~ 1 to 10, ~lade retainers 40 are discretely formed withGut connections and therefore do not form a single, unitary cap member found in many commercially available razor heads. As illustrated in Figure ~, the two end blade retainers 40 are connected to respective side supports 80 ~ia molded connecting me~ber 83. Connecting members 83 are designed to minimize the risk of exposure of either or both of the blades if the r3zor head 10 i5 misused by a person applying an outward, lateral-forCe to side supports 80.

As shown in the illustrated e~bodiment, side supports 80 comprise upper side retainers 81 and lower guard portions 82. Upper side portions 81 are located above and adjacent to the upper blade 20 to retain the upp~r blad-against the spacers 100 and also to control the blade gaometry along the side portions of the ~lexible razor head 10. ~hose ~killed in the art will also appreciate that lowcr guArd portions 82 cover the forward corner~ of lower blade 30 while also sorving as a guard member to control the blade geometry. Referring to F~g. 10, the bottom of lower blade 30 can be seen supported by a plurality of blade platfo D 70 which are integrallY
formed with corrugations 60. Each platfor~ 70 preferably has a substantially planar upper portion ~6 adjacent to lower blade 30.

~ 2139~82 A~ shown in Figur~ 9 ~nd 10, a spac-r loo is pre~erably provided b~tw~n upp-r blade 20 and low-r bl~d-30 proximat~ Qach r~taining ~ombQr 40 Th- spac-r lOo i-pr~f~rably positioned subst~ntially c-ntrally with r--p-ct S to the widt~ of th- corregponding blad~ retain~r 40 and blad platform 70 Tho~- ~kill-d in th~ art will appr ciate that th- ability to flui~h shaving d-bris fro~
tho_ 5p~C- b-tw -n th~ blad~ is nhanced by d~i~igning ach spac-r 100 to hav ~ width 1-~- than th- corr -pondinq wldths of blad~ spac-r 40 and blad~ platfor~ 70 Spac-r 100 m~intains a pr~deter~in~d space, for ~xa~ple about 02 inch-~, botw -n low-r bl~d- 30 and upp-r blade 20 A~
- shown mor- cl~arly in Figuro 11, spacer 100 is int~grally for~ d with blad- rotain~r 40 In ord-r to incr-a~- tho fl xibility of the blade support, flexible razor head 10 is provid d with corrugations 60 b~two~n ad~oining blade platforms 70 The corrugations are int~grally formed with retainer ~e~b-rs ~he positioning of corrugations 60 on both sides of a bla~do platform 70 is shown in Figure 10 which is a cros--ctional vi-w along lin ~ 10-10 of Flgur- 3 Corrugatlon~ 60 may b~ for~ d in a gon-rally U-ishap- with a round-d low~r portion or ~ay bo ~or~od with two v-rtic~l id- portion~ and a lowor horizontal ~-g~ nt conn-cting tha vortical ~ido wallg Othor ~h~p~s are p w ~ible without doparting fro~ th- scop- of th~ prQ~-nt inv-ntion Corrug~tion~ 60 allow relativ- ~ov ~ont b-tw -n nolghboring bl~d platfor~ ~0 durinq th~ fl~xing of floxibl~ r~zor h-ad 10 Tho u-- of di5cret blad-platfo N 7Q connl ct d by a corrug~tion 60 ~ini~iZ- th-pot ntial for s-p~ration b twoen tho upper supporting ~- surfac- of bIad platfor~ 70 and th~ botto of lower blad ~` i 30 In t~ nnor, th corroct bladc goo try i~
int~in-d at ~ch point ~long tho fl xibl- r~zor h-~d 10 ov n during fl xing which occur~ during h~ving ~ ~`

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As used herein, the term "corrugation" is meant to include a resilient connector disposed between adjoin~ng blade platforms and ~aving a length greater than the "normal" distance between those adjoining blade plat~orm~, i.e. the gap existing when the flexible razor head is in a substantially linear con~isuration and is not subject to external forces such as those encountered during shaving.
The corrugations of the present invention are longor than the "normal" distance and are pr~ferably at least about 20% longer than the normal distance. Furthermore, the corrugations may be formed with sidewalls having sections with different thicknesses in order to further increaao the flexibility of the blade support.

A guard support 55 depends downwardly and forwardly from each blade plat~orm 70 in the illus~rated preferred embodiment. As illustrated more cle~rly in the bottom -view of Figure 6, each guard support 55 extends fro~ a rearward position between corrugations 60 to a position forward of cutting edge 31 to gupport guard members 50.
Thos- skilled in the art will appreciate that discrete guard members 50 provide a function similar to a continuous guard bar in~providing a suitable blade geometry to the flexible shaving head 10 of the pre~ont invention, while providing qre~ter flexibility than a~
conventional continuous guard bar form~d of the same materials.
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Figures ~ and 8 illustrate an upp-r bla~o 20 and a lower hl~de 30, respectively, u~d in the illustrated emoodiment of the present invention. Both upper blade 20 30 and lower blade 30 compri~ a forw~rd cutting edgs 21, 31 and side positioninq slots 23, 33 and 24, 34. As illustrated, left side slots 23, 33 may bo ~or~ed with a shape dirrerent from right sidQ slot~ 24, 34 in ord-r to en~ure propor positioning within a mold cavity. Each 35 blade i9 also prer~rably provid d with a g n rally ,., A ', ,, ~ 2139~82 c-ntrally locat~d hole 25, 35 A~ illustrat-d in Figur 3, a s-curing me~ber 105, which is integrallY orm-d wlth c-ntral blade retainer 40 and central blade platfor~ 70, pa~-s through both of the~e contrally locat-d holes 25, S 35 In the illustrated pref~rred e bodiment of the pr --nt invention, the~ contral hole~ 25, 35 ar~ th- only po~ition~ whore a securing ~ ~b-r pa~ entirely through both blado-Tho~e ~kill~d in th~ art will appr ciat- that the fl-xibility of the razor h~ad of the pre~ent invention would bo iJpod d if upp r bl~d~ 20 wa- affix d to low r blad- 30 along its ~ntir~ longitudinal lQngth Thi~ i~
due to th fact that a~ the razor head 10 fl-x-~, point~
on upp-r blade 20 will have a tendency to ~o~e lat~rally lS r lative to points on low bl~d~ 30 If lateral shifting is not p~itt d, flexing ig i~p dod and th blades will not fl~x ev nly ther~by di~torting the bladc geo~etry Th~refore, in accordance with the illustrat~d e~bodi~ent of the pre~nt invQntion, lower blade 30 is secured at ~id-hol-s 36, 3~ to a nu~ber of di~crete blade platfora~
70 vhlch are movable relativ~ to each other as ~xplain d abov- T~- ~id-holeJ 36, 3~ of lower blade 30 r-coiv--curing a ~b-rs during the ~ormation o~ th ~lexibl-razor h-ad 10 Sinc- upp-r bl~do 20 ha~ no hol-~ at th-J-po-itiona, th upp r blado 20 doo~ not roc-iv- th~
curing ~ nbor~ Con~oquontly, th~ shifting of uppor -~
blad~ 20 rolative to lowor bladQ 30 is not impoded at ; th-~- position~ Addition~lly, in a ~anner do~cribod in ~ furt~or d-tail below, l~ft po~ition hol~ 38 al~o r~ceiv - ~ 30 so~ th-r~opla~tic mat-rial which ~l~o may t-nd to fa~t n low r blad 30 to a corr~ponding bl~do platfor~ 70 In -` `
contra~t, upper blad~ 20 r~c-iv-~ th~r~opl~tic ~atorial ~ -tbrowgb oblong, right po~itioning hol~ 29 but not at l-ft `~
po-itioning hole 28 .

- - :.-~ -213~82 Razor head 10 is preferably ~orm-d by in~-ction molding by first placing lowor blado 30 into a ~old with locating pins extending ~rom tho botto~ of the mold cavity through positioning hole8 38 and 39 A mold cavity spac-r is then positioned on top of bottom blade 30 and uppor blad- 20 i8 thon po8itionod on th sa~ positionlng pin~
which extQnd through po~itioning hol-~ 28, 29 The plac-~ nt of th~ blades 20, 30 on th- pin~ is facilitat d by providing oach blade with ono oblong po~itioning hol-as illustrated Those skilled in tho art will appreciat-that the mold member positionod botwo n th blades is ~' d sign-d to pr vent the flow of thor~oplastiC matorial wh r- such mat-rial is not ulti~at-ly d-sir d Tho mold is then clo~-d and a thor~oplastiC mat-rial, such as polypropylon~, is inj~ct~d into the ~old cavity to ~; for~ fl-xible razor hoad 10 T,hos~ ~killed in t~e art will appreciate that other m~t~ri~ y be used in tho preferred ~olding process of the present invention such as poly-thyl-n~ Polypropylono ha~ b- n found to be d -irable sinco it allowg th~ dogired a~ount of ' fl-xibility and cost effoctiv~ ~anufacturing whilQ
provid$ng adoquat- support for th~ blado~ and suffici-nt rigidity to maintain tho d-~irod bl~d g-o~otry Polypropyl-no al80 provido- a low ~old t~p-rature r lativo to oth-r mat-rial~ Xnown in the art for th for~ation of razor hoads This low ~old te~per~tur i9 d irabl- if a shaving aid is to b~ added to th- flexibl-razor h-ad in a sequ-ntial molding proc-ss A floxibl~ razor hoad o~ tho pro~ont invontion is ~ 30 adapt d to bo supportod by a razor J chaniS~ (illustrat d ;~- partially in phantom in Fig 9) having outw~rdly bia-od ttach~ nt ~ b-rs T~Q illu tr~tod floxiblo razor h ad 10 is shown in Figuro 6 as h~ving ~n ~ttach- nt ~lot 110 dofin d by out-r sidow~ 115 d 120, inn r ~all 13S, 3S out r w~ll 140, and ~lot cov~r pl~t~ lS0 and 160 having ' ~"........ . .. . .

~''1. '' ' , ~ ~
, ~ . .
~` -2139~82 inn~r dge~ 151 and 161, re~pectively Inner wall 13S h~
an inner wall slot 180 defined by inner side walls 12S and 130 The slot cover plates 150 and 160 cover the outQr ends of th- slot 110 but, a5 shown in Figure 6, leave a portion of the inner end of slot 110 and the entire central region of slot 110 uncovered for the passage of an attachm~nt me~ber of a razor ~he outwardly biased ar~s are advantag ously desiqned to aainta$n the razor cartridgQ in a substantially linear configuration in the absence of shaving forces As be~t illustrat d in Figure 9, inner side walls 125 and 130 ~ay be extend d downwardly together forming an attach~ nt neck 90 Attachment neck 90 is designed to provid- a greater bearing sur~ace for a razor attachment _ ber (shown in phantom) thereby reducing the potential for flexible razor head to rock when attached to a razor -m chanism A fl~xible razor head of the presont invention aay ;~
also b- d~sign~d to receive one or more additional ~ -el-~ nts such as a shaving aid in a subsequent molding or ass~bly stcp For xa~pl~, during th- molding of a fl~xible razor head according to th~ pr sent invention, a blad- r-tain-r ~ay b- form-d with dopr Jsions design~d to -~
~;-; r~c~iv a shaving aid Th~ co~pleted Slexible razor h~ad could then b~ subjected to a gupplemental molding step wh-r in a shaving aid is sequentially molded into the rec-s~-s in the blade retainers ~;
-, In accordance with th anoth~r preferred eabodi~ nt -~-illustrat~d in Figures 12 to 14, on~ or ~ore of the blade retainers 140 is initially molded with a receptacl~ 142 hiaving flexible sid walls 143 Th- initially ~old d fl-xibl- razor h-ad is th-n sub~ct d to a ~ub--qu-nt molding st-p wherain sido wallJ 143 ara ~ir-t b-nt downwardly into racaptaclo 142 and th n a ~having aid is :: `
~:

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~ 2139582 injected into r-ceptacle 142 Figure~ 13 and 14 $11ustrate the final positioning of th- shaving aid 14S on blade retainers 140 The cut away vi-w of Figur- 14 illustrates the positioning of sidewall 143 below the S shaving aid 14S in the final flexible razor head of this embodiment _ Ex-Dplary materials con~tituting th- ~having aid ~ay co~prise one or varioug conbinationg of the followinq:

a A lubricating aq-nt for roducing th frictional forces between the razor head and the g~in, e g , a nicro-encapsulated silicone oil ~ b An agent which r-duces the drag betwe-n the ; razor parts and the shavor~s face, e g , a polyethyl-n oxido in the rango of ~olocular weights of about lOO,oO0 --to about 6,000,000 a non-ionic polyacrylamide and/or a natural polysaccharide derived fro~ plant materials such as nguar gumU
:~:
c An ag-nt wh$c~ modi~ies t~ chemical structur-of th hair to allow the razor blade to paJ- through th whi~k rs v-ry easily, e g , a depilatory ag-nt is on-exa~pi-d A cleaning agent which allow~ whiskers and ~kin d-bris to be washed more ea~ily fro~ tho razor parts during shavinq, e g , a silicon~ poly~thylene oxide block ~ 25 copolym r and detergent such a~ sodium lauryl sulphatQ

; i ~ e A m dicinal ag-nt ~or killing bact ria, or repairing skin da~age and abra~ions f A cos~otic ag-nt for ~o~ton~ng, ~oothinq, conditioning or improvinq th kin ~' . . .
i,..i ~.

i,~,,..

g A blood coagulant ~or the supprosJion o~
bleeding that occurs fro~ nicks and cuts As has been mentioned h~r~inabove, the configuration of the shaving aid, its place o~ application to the razor cartridge, the ~anner of attach~nt and/or other neans and m thod of ineorporation ~ay vary widely to ~it particular require~ nts An alt-rnativo e~bodiment of tho pre~ont invention, i e , razor head 10,~ ig illustrated in Figs 15-18 Like razor h-ad 10, razor head 10~ ig a one piece continuous th r~oplastie body in which the blades are seeured substantially rigidly again~t ~ov -ent and vibration during shaving As is known in th~ ~having industry, th d sign and po~itioning of the eap portion and guard bar of th razor h~d with r-sp-ct to the cap and soat bladeJ
creat- what is co~monly referr~d to as a ~shave geo~etry ~
A proper shave geo~etry is an i~portant factor in ensuring a co~fortable and a suooth shave The e bodi~ nt d-piet-d in Figur~ 15 shows t~-addition of a skin ~low control rail 200 and a shaving aid 210 which inolud ~ corruqation~ 211 to p~rmit flexing during ~havinq. Razor head 10~ has also be-n ins-rt nold d so that the guard ~e~bers 50~ are interconnected and eontinuous with skin flow control rail 200 As ~hown in Fig 18, r~zor h~d 10~ is also provid d with flow-throuqh ring~glots 220 Shaving d~bris tend-to aeeu ulate b-twoen th~ c~p and g~t blado~ during ~havinq.~ Thi8 d bri~, whieh ean detraet fro~ th eff~etiv~nQss of the razor unit, i8 oft n dif~icult to r ov by rinsinq alon~ T~1~ dir~ieulty in r ~oving th shaving d bris whieh b-eo~ ~ lodg d betwaen th blad--ott n fore-- the usar to hav- to ~t~p~ the r~zor ~ ad again t t~- ink, count-r, te to elear the blad--~ 2139~82 Razor head 10~ addresse8 this concern by incorporating rinse slots ~20 in the back surface Or the head The slots are positioned between the blades such that a flow o~ water directed into the slots from the rear of the razor unit will dislodge any shaving debris trapped betw-en the blades Another embodiment of the present invention is illustrated in Figs 19-21 Reforring to Figs 20 and 21, razor unit lon is molded so that both the cap blade and lo the seat blade are supported egually by plastic In particular, the amount of unsupported seat blade (i e , lengtb Xl) i5 substantially equal to th a~ount of unsupported cap blade (i e , length X2) Phantom line~ A, B, and C depict the additional continuoug body sections a, b, and c which distinguish this preferred embodiment These minute body modifications provide unique cooperative support characteristics over the basic invention illustrated best for comparison in Figures g and 11 The additional body s-gments a, b and c are also 2 0 continuous with the remaind~r of the shaving head ~:
Body segments a, b and c perform basically two functions First, the additional body s-gments equalize lengtb X~ and length X2 so that the vibration cycle of the blad-s will begin substantially simultan-ously when an impact force is exerted on the bladeJ In other words, the blades are synchronized and will vibrate together, thereby ensuring that the sp~n betwe~n the bladas remains substantially constant during sbaving Second, the additional plastic increase9 the rigidity of the blade-, whicb, in turn, decrease th~ a~plitude o~ any vibration in th- blade Ideally, the a~plitud~ o~ any vibration in tb blades should be ~aintained a5 low as po~sibl- to n-ur-tbat the razor h-ad is providing th- us-r witb a con~ortablQ and c109- shav- Soth Or th ~e ~-at~ro-:~. . . .
~ , , , ,, .., ~ .., . .:
~... . . .

~ 21~9~82 nhanc- th~ ability to Daintain ~hav~ g~ometr,v ov~r th-entire length of thQ shaving unit during shaving Though the pregent invention has been illu~trated utilizing two bladeg, thoge skilled in the art will S appr ciate that tho advantage~ o~ the pre~ent invention may alQo bo achi-vod u~ing a single blad razor hQad : ~ :"'`' .,::

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Claims (29)

WHAT IS CLAIMED IS:

1. A razor head comprising:
a) at least one flexible blade having a forward cutting edge, a rear edge, two side edges, and an upper, and a lower surface; and b) a flexible blade support with a continuous single piece thermoplastic body having formed therein i) at least one blade platform formed integrally and continuously with said single piece thermoplastic body, said platform supporting said lower surface of said at least one blade, ii) at least one blade retainer integrally formed and continuous with said single piece thermoplastic body for securing said blade cooperatively between said platform and said retainer, and iii) edge guards integrally formed and continuous with said single piece thermoplastic body, said guard substantially covering corners formed at the intersections of said edges whereby a user of said razor head is protected from said corners during shaving.

2. The razor head of Claim 1 wherein said at least one platform and said at least one retainer are substantially aligned.

3. The razor head of Claim 1 wherein there are at least two blade platforms and a corrugation adjoining said platforms, said corrugation integrally formed and continuous with said single piece thermoplastic body.

4. The razor head of Claim 3 wherein there are seven said blade platforms with said corrugations adjoining them.

5. The razor head of Claim 4 wherein there are seven discrete blade retainers for cooperative securement of said at least one blade.

6. The razor head of Claim 1 which further comprises a plurality of guard members disposed forwardly of said cutting edge, said guard members integrally formed and continuous with said single piece thermoplastic body and disposed forwardly of said cutting edge to provide a desired shave geometry.

7. The razor head of Claim 6 which further comprises a skin flow control rail which extends across and between said guard members, said control rail integrally formed and continuous with said single piece thermoplastic body.

8. The razor head of Claim 1 which further comprises means for attaching said razor head to a razor handle, said attaching means integrally formed and continuous with said single piece thermoplastic body.

9. The razor head of Claim 8 wherein said attaching means comprises two slots integrally formed in the bottom of said blade support and adapted to receive an outwardly biased attachment member of a razor handle.

10. The razor head of Claim 9 wherein said attaching means comprises an attachment neck which extends lower than said guard supports, and is integrally formed and continuous with said single piece thermoplastic body.

11. The razor head of Claim 1 wherein said thermoplastic body comprises polypropylene.

12. A twin blade razor head comprising a) a flexible cap blade having a forward cutting edge, a rear edge, two side edges, an upper, and a lower surface;
b) a flexible seat blade having a forward cutting edge, a rear edge, two side edges, an upper, and a lower surface; and c) a flexible blade support with a continuous single piece thermoplastic body having a front and a rear and having formed therein i) at least one blade platform supporting said lower surface of said seat blade, ii) at least one spacer integrally formed and continuous with said single piece thermoplastic body securing said seat blade therebetween and for supporting said cap blade thereon, iii) at least one blade retainer integrally formed and continuous with said single piece thermoplastic body for securing said cap blade between said retainer and said spacer at a distance and spatial location to form a desired shaving geometry, and iv) edge guards integrally formed and continuous with said single piece thermoplastic body, said guards substantially covering corners formed at the intersections of said edges whereby a user of said razor head is protected from said corners during shaving.

13. The razor head of Claim 12 wherein said at least one platform, said at least one spacer, and said at least one retainer are substantially aligned to secure said blades in said desired shave geometry.

14. The razor head of Claim 12 wherein there are at least two blade platforms and a corrugation adjoining said platforms, said corrugation integrally formed and continuous with said single piece thermoplastic body.

15. The razor head of Claim 14 wherein there are three said blade platforms with said corrugations adjoining them.

16. The razor head of Claim 15 wherein there are three discrete blade retainers and three discrete spacers which are substantially aligned for cooperative securement of said blades in a blade geometry.

17. The razor head of Claim 12 which further comprises a plurality of guard members disposed forwardly of said cutting edge, said guard members integrally formed and continuous with said single piece thermoplastic body.

18. The razor head of Claim 17 which further comprises a skin flow control rail which extends across and between said guard members, said control rail integrally formed and continuous with said single piece thermoplastic body.

19. The razor head of Claim 12 wherein said seat blade comprises a seat blade securing opening, said cap blade comprises a cap blade securing opening substantially aligned with and above said seat securing opening, and said razor head further comprising a securing member extending through said seat blade securing opening and said cap blade securing opening and integrally formed and continuous with said single piece thermoplastic body.

20. The razor head of Claim 19 wherein said seat blade securing opening is substantially centrally located in said seat blade.

21. The razor head of Claim 12 wherein said seat blade is directly affixed to a plurality of said blade platforms.

22. The razor head of Claim 12 wherein said seat blade comprises a first opening and a second opening, said first opening larger than said second opening.

23. The razor head of Claim 22 wherein said seat blade is attached to one of said platform members with a securing member extending through said first opening.

24. The razor head of Claim 12 further comprising means for attaching said flexible razor head to a razor handle, said attaching means integrally formed and continuous with said single piece thermoplastic body.

25. The razor head according to Claim 23 wherein said attaching means comprises two slots integrally formed in the bottom of said blade support and adapted to receive an outwardly biased attachment member of said razor handle.

26. A flexible razor head according to Claim 23 wherein said attaching means comprises an attachment neck extending below said guard supports, said attachment neck integrally formed and continuous with said one piece thermoplastic body.

27. The razor head of Claim 12 wherein said one piece thermoplastic body is polypropylene.

28. The razor head of Claim 12 which further comprises body segments added to said platforms, said spacer, and said retainer in incremental amounts sufficient to provide substantially equal unsecured body portions of seat blade and cap blade, said body segments integrally formed and continuous with said single piece thermoplastic body.

29. The razor head of Claim 12 which further comprises rinse slots formed in the rear of said razor head whereby fluid can be directed through said razor head to remove shaving debris and soap.