D E S C R I P T I O N

The invention concerns a safety razor of the sort stated in th * introduction to claim 1.

- 5 Such safety razors are known from the descriptions to DK precep No. 144460 and US patent No. 3 786 563.

It is a disadvantage of the conventional safety razors that th razor blades have been designed with only one cutting edge on on side, meaning that the blade cassettes have to be exchange 10 frequently. Furthermore, all conventional safety razors have complicated construction.

This invention serves the purpose of procuring a safety razor o the sort mentioned in the introduction, where the razor blade are provided with a cutting edge on both sides, and a blad 15 cassette, which can be turned inside the cassette holder, thu a blade cassette will last twice as long as that of any conven tional safety razor.

According to the invention this purpose is achieved through th fact that the safety razor mentioned in the introduction i 20 peculiar as to the characterizing part stated in claim 1.

Through this a more simple construction of the safety razor wil also be reached, and there will be a decrease in tool costs.

Claim 2 concerns special locking devices through which the ca section of a blade cassette can be locked to the base section.

25 Claim 3 concerns a special construction of both the blad cassette with exterior mating surfaces and the cassette holde with interior control surfaces, through which a blade cassett can be locked unambiguously in the cassette holder, and

« claim 4 concerns special devices through which a blade cassett 30 can be locked in position in proportion to the cassette holder

A detailed explanation of the invention shall follow referrin

to the drawing on which

Fig. 1 shows a sectional view of a safety razor as to the invention mounted with a blade cassette in the cassette holder.

Fig. 2 shows on a larger scale and in perspective a cassette holder for the safety razor shown in Fig. 1.

Fig. 3 shows on a larger scale and in perspective a blade cassette for a safety razor as to the invention.

Fig. 4 shows a separated blade cassette.

Fig. 5 shows a rear view of the blade cassette.

Fig. 6 shows a cut through a blade cassette.

Fig. 7 shows a cut through a cassette holder for a safety razor as to the invention, and

Fig. 8 shows a cut through a cassette holder, in which a blade cassette has been mounted.

The safety razor has, as it is seen from Fig. 1 a handle 1, which at the top ends in a cassette holder 2 in which a demountable blade cassette has been mounted.

As shown on Fig. 4 and 6 a blade cassette 3 consists of a cap section 4 and a base section 5. Between the cap section and the base section a front-lying, lengthy razor blade 6 with a cutting edge 7 in front; lying behind it and parallel to it a rear lengthy razor blade 8, which on its frontside has a cutting edge

9, have been mounted. The blades are held in a certain mutual distance b, which e.g. could be 0.5 mm, through a distance piece

10. The body part 4 has been designed with a contact face 11, being in contact with the skin during shaving. The front edge 12 of the contact face 11 has been somewhat drawn back a e.g. 0.63 mm in comparison to the edge 9 of the blade 8. The contact face 11 has been positioned in a lower level than a plane through the cutting edges 7 and 9, and could e.g. form an angle of 23° with the plane of the blade 8. The base section 5 protrudes in front

of the cutting edge 7 of the blade 6 and has on its front longitudinal edge or bearer 13, which on top has a wavy conta face 14, which is in contact with the skin during shaving. T contact face 14 has also been placed in a level, which is low than that of a plane through the cutting edges 7 and 9. Behi the bearer 13 there is a base section 5 with a first row of cu outs 15, and in some distance from there a second row of cut-ou 16. The cut-outs 15 and 16 are separated by a longitudinal ed 17 and the cut-outs 15,16 are separated in a crosswise directi by the edges 18.

The blades 6 and 8 have been placed in a certain mutual distan c between the cutting edges 7 and 9 , e.g. being 1.0 mm, as we as between and in a certain distance d from the edge 7 and t first wave of the contact face 14, e.g. being 1.20 mm. Furthe more the blades 6 and 8 have been mounted considering a certa angle v, e.g. being 31° with a plane through the edge 7 and t top of the first wave of the contact face 14. The cassette hold 2 can be placed so in proportion to the handle 1 and the bla cassette 3 can be placed so in proportion to the cassette hold 2 tha the blades 6 and 8 and the handle form an angle of e. 65°.

Behind the edge 7 there is a blade 8 provided with a row of cu outs 21, which - when mounted in the blade cassette 3 - lev with the second row of cut-outs of the base section 5 and t allows scraps from shaving from the cutting edge 9 to pas Scraps from shaving from the front edge 7 are led through first row of cut-outs 15 of the base section 5.

Connected to each cut-out 21 is a blade 6 designed with an ext short cut-out 22 into each of which a dowel 23 with a cro sectional shape identical to the cut-out 22 can be adapted. The dowels are placed on the longitudinal edges 17.

Behind the cut-outs 16 of the base section 5 the construct includes e.g. two dowels 24 and two holes 25. The cap sectio has on level with the dowels 24 holes 25 and on level with holes 25 dowels 24. The blades 6 and 8 and the distance piece has been constructed with holes 26 and 27, respectively, thro which the dowels 24 have been led during assembly of the bl

casette. The cap section 4, the blade 8, the distance piece 10, the blade 6 and the base section 5 have been directed into a precise mutual position by the dowels 24 during the assembly of the cassette.

The blade 6 is on the long side opposite to the edge 7 provided with another edge 19, and the blade 8 is on the side opposite to the edge 9 provided with another edge 20.

The distance piece 10 has, on level with the edges 28 between the cut-outs 21 of the blades 6 and 8, fingers 29 each having an upper contact face 30 to the blade 8 and a lower contact face 31 to the blade 6.

The contact faces 11' and 14' belonging to the cutting edges 19 and 20 have been designed as and placed with the same angles as exist between the contact faces 11 and 14 and the blades 6 and 8. The cut-outs 15' and 16' are constructed as the cut-outs 15 and 16, and they have been placed in the same mutual position to the edges 19 and 20 as exist between the cut-outs 15 and 16 and the edges 7 and 9. Furthermore the distances a, c and d are identical to both sets of edges.

The two blades 6 and 8 may be of uniform design, and the blade 8 is then mounted in the blade cassette in a turned position of 180° in proportion to the blade 6.

The cap section 4 may be designed as the base section 5, but it is then mounted in the blade cassette 3 in a turned position of 180° in proportion to the base section 5.

The base section 5 and the cap section 4 have at both ends an end piece 32. Each end piece has, on the side which is turned against each other inside the assembled blade cassette, a mating surface 33. Each end piece also has at one end a dowel 34 and at the other end a cut-out or a recess 35.

During assembly of a blade cassette the two dowels 34 of the cap section 4 may mesh in a self-locking grip with the two cut-outs 35 of the base section 5, and the two dowels 34 of the base section

5 a grip with the two cut-outs 35 of the cap section, in whi position the two mating surfaces 33 of each end piece 32 wi meet.

As it is seen from Fig. 6, 7 and 8 in particular the bla cassette 3 has been constructed with mating surfaces, and t cassette holder has been provided with interior control surfac constructed to maintain the cassette holder 3 in a specifi definite first position as well as in an alternate position whe it is turned 180° around a central axis in the cassette, meani that the blades 6 and 8 form the same angle with the handle that of the position mentioned first.

With reference to the base section 5 the mentioned mati surfaces may consist of the first mating surface 36 stretchi from the lower edge 37 of the bearer 13 to for instance the re edge 38 of the cut-out 16 from where the surface 36 continues the contact face 11 and from there to the centre line C-C. Aft that the mating surface continues into surface 39 and anoth surface 40 both of which are shaped into end pieces 32. Simil mating surfaces are found on the top side of the cap section The frontside of the bearer 13 has been provided with additional mating surface 41.

The cassette holder has both an interior, upper control surfa 42, which matches the mating surface 36, and a lower cont surface 43, which matches the mating surfaces 40 of the two e pieces 32. In front the control surface 43 continues into a fro control surface 44, which matches the mating surface 39, and the back it continues into a rear control surface 45, whi matches the mating surface 41.

The bottom piece 46 and the top section 47 of the cassette hol has been placed so that they up front end by the rear edge 38 the cut-outs 16 in the base section 5 and the cap section respectively, in a blade cassette 3 mounted in the casse holder 2. The top section 47 ends in a front tip, and the side 48 of the top section is even with the same gradient as contact face 11. As shown the bottom piece 46 may be provi with a dowel 49, which meshes with a hole 50 of the base sect

position.

The safety razor which has been shown and described is only on example of the invention. Other designs and constructions may b " developed within the limits of the invention. The mating surface as well as the control surfaces may be elaborated differently.