Razor blades

Claim 2

A mounted razor blade of the type comprising a moulded plastics support member in which is mounted, at a predetermined angle, a blade member having an exposed cutting edge located at a predetermined spacing from the support member, wherein there is provided on said support member an indicator mark visibly alterable in appearance by use of the blade.

Claim 3

A blade according to claim 1, wherein said mark is visibly alterable in appearance by immersion of the blade in water.

Claim 4

A blade according to claim 2, wherein the mark comprises a water-soluble material which dissolves upon immersion of the blade in water thereby to effect a visible alteration in the mark.

Claim 5

A mounted razor blade of the type comprising a moulded plastics support member in which is mounted, at a predetermined angle, a blade member having an exposed cutting edge located at a predetermined spacing from said support member, wherein there is provided on said support member an indicator mark comprising a water-soluble colourant absorbed in a water-soluble porous carrier material bonded to the support member, said colourant being leachable from said porous carrier material thereby to cause said mark to change colour upon immersion of the blade in water.

Claim 6

A mounted razor blade of the type comprising a moulded plastics support member in which is mounted, at a predetermined angle, a blade member having an exposed cutting edge located at a predetermined spacing from said support member, wherein there is provided on said support member an indicator mark comprising a water-soluble colourant absorbed in a water-soluble porous carrier material bonded to the support member, said colourant being leachable from said porous carrier material thereby to cause said mark to change colour upon immersion of the blade in water.

Claim 7

A mounted razor blade of the type comprising a moulded plastics support member in which is mounted, at a predetermined angle, a blade member having an exposed cutting edge located at a predetermined spacing from said support member, wherein there is provided on said support member an indicator mark comprising a water-insoluble material bonded to the support member by a layer of adhesive, said adhesive being water-soluble and thereby being effective to cause separation of said water-insoluble material from the support member and hence the disappearance of said mark upon immersion of the blade in water.

Claim 8

A mounted razor blade of the type comprising a moulded plastics support member in which is mounted, at a predetermined angle, a blade member having an exposed cutting edge located at a predetermined spacing from said support member, wherein there is provided on said support member an indicator mark comprising a water-insoluble material bonded to the support member by a layer of adhesive, said adhesive being water-soluble and thereby being effective to cause separation of said water-insoluble material from the support member and hence the disappearance of said mark upon immersion of the blade in water.

Claim 9

A blade according to claim 5, wherein the mark comprises a water-soluble pigment incorporated in a water-soluble binder adhering to the support member.

Claim 10

A blade according to claim 6, wherein the mark comprises titanium dioxide incorporated into a film of water-soluble polymer deposited on the support member.

Claim 11

A blade according to claim 5, wherein the mark comprises a patch of opaque water-insoluble material affixed to the support member by a water-soluble adhesive, and wherein the support member is provided with permanent mark underlying said patch, said permanent mark being exposed to view upon immersion of the blade in water and dissolution of said adhesive.

Claim 12

A mounted razor blade of the type comprising a moulded plastics support member in which is mounted, at a predetermined angle, a blade member having an exposed cutting edge located at a predetermined spacing from said support member, wherein there is provided on said support member an indicator mark comprising a film of water-soluble material deposited on the support member, immersion of the blade in water thereby being effective to dissolve said film and to effect the disappearance of said mark.

Claim 13

A mounted razor blade of the type comprising a moulded plastics support member in which is mounted, at a predetermined angle, a blade member having an exposed cutting edge located at a predetermined spacing from said support member, wherein there is provided on said support member an indicator mark comprising a film of water-soluble material deposited on the support member, immersion of the blade in water thereby being effective to dissolve said film and to effect the disappearance of said mark.

Claim 14

A blade according to claim 9, wherein said film is opaque and wherein said support member is provided with a permanent mark underlying said film, the said permanent mark being exposed to view upon immersion of the blade in water and consequent dissoLution of said film.

Claim 15

A mounted razor blade of the type comprising a moulded plastics support member in which is mounted, at a predetermined angle, a blade member having an exposed cutting edge located at a predetermined spacing from said support member, wherein there is provided on said support member an indicator mark comprising an acid-base indicator changeable in colour upon immersion of the blade in water of neutral or alkaline pH.

Claim 16

A mounted razor blade of the type comprising a moulded plastics support member in which is mounted, at a predetermined angle, a blade member having an exposed cutting edge located at a predetermined spacing from said support member, wherein there is provided on said support member an indicator mark comprising an acid-base indicator changeable in colour upon immersion of the blade in water of neutral or alkaline pH.

Claim 17

A blade according to claim 11, wherein the mark comprises a porous water-insoluble carrier material bonded to the support member and impregnated with the acid-base indicator.

Claim 18

A razor dispenser comprising a receptacle, a plurality of blades removably received in said receptacle, each of said blades being of the type comprising a moulded plastics support member in which is mounted, at a predetermined angle, a blade member having an exposed cutting edge located at a predetermined spacing from the support member, each of said blades being positioned in said receptacle so the plastics support member of each blade is visible therein and so that each of said blades is separately removable therefrom, wherein the plastics support member of each of said blades is provided with an indicator mark in a position to be visible while the blade is in the receptacle, said mark being visibly alterable by removal and use of the blade.

Claim 19

A razor dispenser comprising a receptacle, a plurality of blades removably received in said receptacle, each of said blades being of the type comprising a moulded plastics support member in which is mounted, at a predetermined angle, a blade member having an exposed cutting edge located at a predetermined spacing from the support member, each of said blades being positioned in said receptacle so the plastics support member of each blade is visible therein and so that each of said blades is separately removable therefrom, wherein the plastics support member of each of said blades is provided with an indicator mark in a position to be visible while the blade is in the receptacle, said mark being visibly alterable by removal and use of the blade.

Claim 20

A razor blade dispenser according to claim 13, wherein said receptacle comprises a tray in which the plurality of blades are disposed in a parallel array.

Claim 21

A razor blade dispenser according to claim 14, wherein said receptacle comprises a transparent lid fitting over said tray.