Razors and razor blade cartridges and methods of manufacturing therefore

Patent metadata

Field	Value
Publication number	US-2016354939-A1
Application number	US-201315110407-A
Country	US
Kind code	A1
Filing date	Nov 26, 2013
Priority date	Jan 9, 2013
Publication date	Dec 8, 2016
Grant date	—

Abstract

A razor blade cartridge having at least one razor blade and a housing made from a polymer material and having an outer surface where at least part of the outer surface of the housing is coated with a hydrophilic material, and where the outer surface of the housing includes undulations on at least a portion of the coated part.

First claim

1 .- 35 . (canceled)

36 . A razor blade cartridge including at least one razor blade and a housing made from a polymer material and comprising an outer surface wherein at least part of the outer surface of the housing is coated with a hydrophilic material, and wherein the outer surface of the housing comprises undulations on at least a portion of the coated part.

37 . A razor blade cartridge including at least one razor blade and a housing made from a polymer material and comprising an outer surface wherein at least part of the outer surface of the housing is coated with a hydrophilic material, and wherein the coating is formed from an acrylamide.

38 . A razor blade cartridge according to claim 36 , wherein the coating is formed from a vinyl monomer.

39 . The razor blade cartridge according to claim 38 , wherein the coating is formed from an acrylamide.

40 . The razor blade cartridge according to claim 36 , wherein the undulated surface portion is arranged adjacent to the at least one blade.

41 . The razor blade cartridge according to claim 36 , wherein the undulations have a length dimension, a width dimension and a height dimension and the height is defined by a lower trough surface and an upper crest surface joined by intervening side walls.

42 . The razor blade cartridge according to claim 36 , wherein undulations extend longitudinally having a greater length than the height and width.

43 . The razor blade cartridge according to claim 41 , wherein the intervening side walls of the undulations provide an increased contact surface area between the first polymer and the coating such that for a given hydrophilic coating thickness the amount of hydrophilic material is greater than would be the case for a flat surface.

44 . The razor blade cartridge according to claim 41 , wherein the hydrophilic coating is applied at a thickness which extends higher than the height of the undulations such that the troughs are completely filled with coating material.

45 . The razor blade cartridge according to claim 44 , wherein the hydrophilic coating extends in thickness beyond the top of the crests of the undulations and forms a flat outer surface having a thickness above the crests and a greater thickness above the troughs corresponding to the depth of the troughs.

46 . The razor blade cartridge according to claim 41 , wherein the depth dimension between the top of the crests and the bottom of the troughs is within the range 0.01 to 1.0 mm.

47 . The razor blade cartridge according to claim 46 , wherein the depth dimension between the top of the crests and the bottom of the troughs is within the range 0.05 to 0.5 mm.

48 . The razor blade cartridge according to claim 47 , wherein the depth dimension between the top of the crests and the bottom of the troughs is within the range 0.1 to 0.2 mm.

49 . The razor blade cartridge according to claim 41 , wherein the width dimension of the top of the crests is within the range 0.01 to 1.0 mm.

50 . The razor blade cartridge according to claim 41 , wherein the width dimension of the top of the crests is within the range 0.05 to 0.5 mm.

51 . The razor blade cartridge according to claim 41 , wherein the width dimension of the top of the crests is within the range 0.1 to 0.2 mm.

52 . The razor blade cartridge according to claim 41 , wherein the trough width or gap between the ridges is within the range 0.01 to 1.0 mm.

53 . The razor blade cartridge according to claim 41 , wherein the trough width or gap between the ridges is within the range 0.05 to 0.5 mm.

54 . The razor blade cartridge according to claim 41 , wherein the trough width or gap between the ridges is within the range 0.1 to 0.2 mm.

55 . The razor blade cartridge according to claim 44 , wherein the coating has a thickness which extends beyond the top of the crest or ridge within the range 0.01 to 1.0 mm.

56 . The razor blade cartridge according to claim 55 , wherein the coating thickness is 0.05 to 0.5 mm.

57 . The razor blade cartridge according to claim 56 , wherein the coating thickness is within the range 0.1 to 0.2 mm.

58 . The razor blade cartridge according to claim 36 , wherein the undulations are arranged in straight lines.

59 . The razor blade cartridge according to claim 36 , wherein the undulations are arranged in curved lines.

60 . The razor blade cartridge according to claim 36 , wherein the undulations are arranged as discrete circular protrusions.

61 . The razor blade cartridge according to claim 36 , wherein the coating is formed on the polymer material following modification of the surface by functionalization.

62 . The razor blade cartridge according to claim 36 , wherein the housing is made of a co-molding of a first polymer and a second, different polymer.

63 . The razor blade cartridge according to claim 62 , wherein the first co-molded polymer is a polymer to which the hydrophilic coating adheres relatively poorly wherein the second co-molded polymer is a polymer to which the hydrophilic coating adheres relatively well resulting in a coating thickness on the second polymer greater than the coating thickness on the first polymer.

64 . The razor blade cartridge according to claim 36 , wherein the razor blade cartridge is of the non-rotating cutting blade type.

65 . The razor blade cartridge according to claim 36 , wherein the razor blade cartridge is of the rotating shearing blade type.

66 . A method of manufacture of a razor blade cartridge comprising the steps of: providing a cartridge housing including undulated skin contacting surfaces of polymeric material; activating the undulated skin engaging surfaces of the polymer using either physical or chemical means to make the undulated surface receptive to the covalent grafting of a monomer: and then grafting a functional group onto the surface.

67 . The method of manufacture of a razor blade cartridge according to claim 66 , wherein the undulations are provided by molding of the cartridge housing.

68 . The method of manufacture of a razor blade cartridge according to claim 66 , wherein the undulations are provided by the activation process.

69 . The method of manufacture of a razor blade cartridge according to claim 66 , wherein the undulations are provided by a separate stage.

70 . The method of manufacture of a razor blade cartridge according to claim 66 , wherein the functional group is an acrylamide.

Assignees

• SOCIéTé BIC

Inventors

• Hill Andy
• Honour Andy
• Motley Jeff

Classifications

• C08J2355/02

  Acrylonitrile-Butadiene-Styrene [ABS] polymers · CPC title

• B26B21/4068

  Mounting devices; Manufacture of razors or cartridges (B26B21/528 takes precedence) · CPC title

• B26B21/4012 Primary

  Housing details, e.g. for cartridges · CPC title

• B26B19/3893

  Manufacturing of shavers or clippers or components thereof · CPC title

• B26B19/384

  Dry-shaver foils; Manufacture thereof · CPC title