USRE38230EExpiredUtility

Brush having plano-convex profile

Assignee: OREALPriority: Jun 7, 1996Filed: Feb 2, 2001Granted: Aug 26, 2003

Est. expiryJun 7, 2016(expired)· nominal 20-yr term from priority

Inventors:Jean-Louis Gueret

A46B 2200/1053A46B 9/021A46B 3/18A46B 9/02

PatentIndex Score

Cited by

References

174

Claims

Abstract

A brush ( 200 ) has a straight stem ( 201 ) defining a main axis (X—X), a flexible core ( 202 ) having a first and a second end, the first end being integral with the stem, and bristles ( 204 ) implanted radially in the core. The end of the bristles defining the surface ( 205 ) of the brush have a first face, the intersection of any meridian plane passing through the main axis with the surface of the brush defining two peak lines ( 207 ) having a specific curvature. The core is curved, the peak lines ( 207 ) are convex, and the first face ( 207.1 ) is substantially straight and parallel to the main axis (X—X).

Claims

exact text as granted — not AI-modified

What is claimed is:

1. A brush comprising:
a stem defining a main axis;
a flexible core having a first and a second end, the first end being integral with said stem; and
bristles implanted radially in said core, the ends of the bristles defining the surface of the brush,
wherein the intersection of any meridian plane of the brush which passes through including the main axis, with the surface of the brush, defines two meridian lines, and wherein the core is curved along its length such that one of said meridian lines at a first face of the surface is substantially straight in a direction parallel to the main axis.

2. The brush according to claim 1 , wherein the core is at a center of each cross-section defined by the intersection of the surface of the brush with a plane perpendicular to the core.

3. The brush according to claim 1 , wherein the surface of the brush comprises a second face at the other of said meridian lines and having a maximum curvature.

4. The brush according to claim 3 , wherein the curvature of the meridian lines increases continuously from the first face to the second face.

5. The brush according to claim 1 , wherein the brush has a single straight face.

6. The brush according to claim 1 , wherein the brush has a single line of maximum curvature.

7. The brush according to claim 3 , wherein the first face and the second face are diametrically opposite one another with respect to the core.

8. The brush according to claim 2 , wherein the bristles of each of said cross-sections are all of the same length.

9. The brush according to claim 1 , wherein the ends of the core are aligned with the main axis.

10. The brush according to claim 1 , wherein the core is formed by two branches of a helically wound metal wire bent in the form of a U.

11. The brush according to claim 10 , wherein the core is wound with a left-hand pitch.

12. The brush according to claim 1 , wherein the surface of the brush has substantially the shape of an elongate banana.

13. The brush according to claim 1 including alternate rows of short and long bristles, only the long bristles being taken into account for defining the surface of the brush.

14. A brush according to claim 1 , wherein the surface of the brush does not show any substantially concave portion.

15. A method for manufacturing a brush, comprising the steps of :
a) forming providing a starting brush having a stem defining a main axis, a flexible core having a first and a second end, the first end being integral with said stem, and bristles implanted radially in said core, the ends of the bristles defining the surface of the brush, wherein the intersection of any meridian plane of the brush which passes through including the main axis, intersects with the surface of the brush, defines to define two convex meridian lines; and
b) imparting a curve to the core of the starting brush along its length such that a brush is formed which has a first face which is substantially straight in a direction parallel to the main axis.

16. The method according to claim 15 , wherein an intersection of the surface of the starting brush with any plane perpendicular to the core, at each point of the core, defines a cross-section of the starting brush, wherein the core is central in relation to each cross-section.

17. The method according to claim 15 , including the step of imparting a twist to further comprising bending the first end of the core so as to align the second end of the core with the main axis.

18. The method according to claim 15 , wherein the surface of the starting brush has a meridian plane of symmetry.

19. The method according to claim 15 , wherein the surface of the starting brush is a surface of revolution.

20. The method according to claim 15 , wherein the starting brush has a plane of symmetry perpendicular to the axis of the core.

21. The method according to claim 15 , wherein each cross-section of the starting brush is convex.

22. The method according to claim 15 , wherein each cross-section of the starting brush is in the shape of a disk.

23. The method according to claim 15 , wherein the surface of the starting brush is in the shape of a rugby ball.

24. The method according to claim 15 , wherein each cross-section of the starting brush is in the shape of a triangle with rounded corners.

25. The method according to claim 15 , wherein the surface of the starting brush is in the shape of a rugby ball having three substantially flattened faces.

26. The method according to claim 15 , wherein the starting brush has a meridian line of greater curvature, wherein said step of imparting a curve comprises imparting a curve to the core in the opposite direction to said meridian line.

27. A make-up device comprising:
a mascara reservoir; and
a member for the application of mascara, comprising a stem defining a main axis; a flexible core having a first and a second end, the first end being integral with said stem; and bristles implanted radially in said core, the ends of the bristles defining the surface of the brush, wherein the intersection of any a meridian plane of the brush which passes through including the main axis, intersects with the surface of the brush, defines to define two meridian lines, and wherein the core is curved along its length such that one of said meridian lines at a first face of the surface is substantially straight in a direction parallel to the main axis.

28. A make-up device according to claim 27 , wherein the surface of the brush does not show any substantially concave portion.

29. A brush comprising:

a core including first and second ends;

bristles extending radially from said core and being located between a first point along said core and a second point along said core, said bristles having ends defining a surface of said brush, said core being curved between said first and second points;

wherein a straight line passing through said first and second points defines an axis of said brush, and

wherein an intersection of said surface and a first meridian plane including said core defines a first meridian line segment and a second meridian line segment, said first meridian line segment being substantially straight in a direction parallel to said axis, and said second meridian line segment having convex curvature.

30. The brush according to claim 29 , further comprising a stem on one of said first and second ends of said core.

31. The brush according to claim 30 , wherein said stem is aligned with said axis.

32. The brush according to claim 30 , wherein said stem is on said first end of said core and said second point is located at said second end of said core.

33. The brush according to claim 29 , wherein an intersection of said surface of said brush and a second meridian plane passing through said core and being perpendicular to said first meridian plane defines third and fourth meridian line segments, said third meridian line segment being curved.

34. The brush according to claim 33 , wherein curvature of said third meridian line segment is convex.

35. The brush according to claim 33 , wherein said fourth meridian line segment is curved.

36. The brush according to claim 35 , wherein curvature of said third and fourth meridian line segments is convex.

37. The brush according to claim 29 , wherein said core is flexible.

38. The brush according to claim 29 , wherein an intersection of said surface of said brush and a cross- sectional plane defines a cross - section of said brush, said cross - sectional plane including an intersection point along said core and being perpendicular to a line tangent to said core at said intersection point, and wherein bristles defining said surface at said intersection with said cross - sectional plane are of the same length.

39. The brush according to claim 29 , wherein an intersection of said surface of said brush and a cross- sectional plane defines a cross - section of said brush, said cross - sectional plane including an intersection point along said core and being perpendicular to a line tangent to said core at said intersection point, and wherein said core is located in a central portion of said cross - section.

40. The brush according to claim 29 , wherein said core is formed of two helically wound branches of a metal wire.

41. The brush according to claim 40 , wherein said helical winding of said branches has a left- hand pitch.

42. The brush according to claim 29 , wherein said bristles include short bristles and long bristles, and wherein said surface of said brush is defined by the long bristles.

43. The brush according to claim 29 , wherein said surface of said brush has the shape of an elongate banana.

44. A device comprising:

the brush according to
claim 29
; and

a reservoir for containing a product to be applied by the brush.

45. The device according to claim 44 , further comprising a wiper configured to wipe product from the bristles.

46. The device according to claim 44 , wherein the reservoir contains mascara.

47. A method of manufacturing a brush, comprising:

providing a starting brush including

a core including first and second ends, said core being substantially straight, a line extending between two points on said core defining an axis,

wherein an intersection of said surface and a meridian plane including said core defines a first meridian line segment and a second meridian line segment, said first meridian line segment having convex curvature; and

bending said core of said brush so that at least a portion of said first meridian line segment becomes substantially straight in a direction parallel to said axis.

48. The method according to claim 47 , wherein said second meridian line segment has convex curvature.

49. The method according to claim 47 , wherein said starting brush further comprises a stem on one of said first and second ends of said core.

50. The method according to claim 49 , wherein said stem is on said first end of said core, and wherein the method further comprises bending said first end so that said stem becomes aligned with said axis.

51. The method according to claim 47 , wherein an intersection of said surface of said starting brush and a cross- sectional plane defines a cross - section of said starting brush, said cross - sectional plane including an intersection point along said core and being perpendicular to a line tangent to said core at said intersection point, and wherein said core is located in a central portion of said cross - section.

52. The method according to claim 47 , wherein said surface of said starting brush is symmetrical about a plane including said axis.

53. The method according to claim 47 , wherein said surface of said starting brush is symmetrical about a cross- sectional plane including an intersection point along said core and being perpendicular to a line tangent to said core at said intersection point.

54. The method according to claim 47 , wherein an intersection of said surface of said starting brush and a cross- sectional plane defines a cross - section of said starting brush, said cross - sectional plane including an intersection point along said core and being perpendicular to a line tangent to said core at said intersection point, and wherein said cross - section of said starting brush is disk - shaped.

55. The method according to claim 47 , wherein said surface of said starting brush is in the shape of a rugby ball.

56. The method according to claim 47 , wherein said surface of said starting brush is in the shape of a rugby ball having a plurality of substantially flat faces.

57. The method according to claim 47 , wherein an intersection of said surface of said starting brush and a cross- sectional plane defines a cross - section of said starting brush, said cross - sectional plane including an intersection point along said core and being perpendicular to a line tangent to said core at said intersection point, and wherein said cross - section of said starting brush is in the shape of a triangle with rounded corners.

58. The method according to claim 48 , wherein curvature of said core after said bending is substantially the same as curvature of said second meridian line segment before said bending.

59. A brush manufactured according to the method of claim 47 .

60. A brush manufactured according to the method of claim 54 .

61. A brush manufactured according to the method of claim 55 .

62. A brush manufactured according to the method of claim 56 .

63. A brush manufactured according to the method of claim 57 .

64. A brush comprising:

a core including first and second ends, said core being curved along a length of said core;

a stem defining an axis of the brush, said stem being on one of said first and second ends of said core; and

bristles extending radially from said core and being located along said core, said bristles having ends defining a surface of said brush;

65. The brush according to claim 64 , wherein an intersection of said surface of said brush and a second meridian plane passing through said core and being perpendicular to said first meridian plane defines third and fourth meridian line segments, said third meridian line segment being curved.

66. The brush according to claim 65 , wherein curvature of said third meridian line segment is convex.

67. The brush according to claim 65 , wherein said fourth meridian line segment is curved.

68. The brush according to claim 67 , wherein curvature of said third and fourth meridian line segments is convex.

69. The brush according to claim 64 , wherein said core is flexible.

70. The brush according to claim 64 , wherein an intersection of said surface of said brush and a cross- sectional plane defines a cross - section of said brush, said cross - sectional plane including an intersection point along said core and being perpendicular to a line tangent to said core at said intersection point, and wherein bristles defining said surface at said intersection with said cross - sectional plane are of the same length.

71. The brush according to claim 64 , wherein an intersection of said surface of said brush and a cross- sectional plane defines a cross - section of said brush, said cross - sectional plane including an intersection point along said core and being perpendicular to a line tangent to said core at said intersection point, and wherein said core is located in a central portion of said cross - section.

72. The brush according to claim 64 , wherein said core is formed of two helically wound branches of a metal wire.

73. The brush according to claim 72 , wherein said helical winding of said branches has a left- hand pitch.

74. The brush according to claim 64 , wherein said bristles include short bristles and long bristles, and wherein said surface of said brush is defined by the long bristles.

75. The brush according to claim 64 , wherein said surface of said brush has the shape of an elongate banana.

76. A device comprising:

the brush according to
claim 64
; and

a reservoir for containing a product to be applied by the brush.

77. The device according to claim 76 , further comprising a wiper configured to wipe product from the bristles.

78. The device according to claim 76 , wherein the reservoir contains mascara.

79. A method of manufacturing a brush, comprising:

providing a starting brush including

a core including first and second ends, said core being substantially straight,

a stem defining an axis, said stem being on one of said first and second ends of said core, and

bristles extending radially from said core and being located along said core, said bristles having ends defining a surface of said starting brush, and

bending said core of said brush so that at least a portion of said first meridian line segment becomes substantially straight in a direction parallel to said axis.

80. The method according to claim 79 , wherein said second meridian line segment has convex curvature.

81. The method according to claim 79 , wherein said stem is on said first end of said core, and wherein the method further comprises bending said first end of said core so that said second end of said core becomes aligned with said axis.

82. The method according to claim 79 , wherein an intersection of said surface of said starting brush and a cross- sectional plane defines a cross - section of said starting brush, said cross - sectional plane including an intersection point along said core and being perpendicular to a line tangent to said core at said intersection point, and wherein said core is located in a central portion of said cross - section.

83. The method according to claim 79 , wherein said surface of said starting brush is symmetrical about a plane including said axis.

84. The method according to claim 79 , wherein said surface of said starting brush is symmetrical about a cross- sectional plane including an intersection point along said core and being perpendicular to a line tangent to said core at said intersection point.

85. The method according to claim 79 , wherein an intersection of said surface of said starting brush and a cross- sectional plane defines a cross - section of said starting brush, said cross - sectional plane including an intersection point along said core and being perpendicular to a line tangent to said core at said intersection point, and wherein said cross - section of said starting brush is disk - shaped.

86. The method according to claim 79 , wherein said surface of said starting brush is in the shape of a rugby ball.

87. The method according to claim 79 , wherein said surface of said starting brush is in the shape of a rugby ball having a plurality of substantially flattened faces.

88. The method according to claim 79 , wherein an intersection of said surface of said starting brush and a cross- sectional plane defines a cross - section of said starting brush, said cross - sectional plane including an intersection point along said core and being perpendicular to a line tangent to said core at said intersection point, and wherein said cross - section of said starting brush is in the shape of a triangle with rounded corners.

89. The method according to claim 80 , wherein curvature of said core after said bending is substantially the same as curvature of said second meridian line segment before said bending.

90. A brush manufactured according to the method of claim 79 .

91. A brush manufactured according to the method of claim 85 .

92. A brush manufactured according to the method of claim 86 .

93. A brush manufactured according to the method of claim 87 .

94. A brush manufactured according to the method of claim 88 .

95. A brush comprising:

a stem defining a main axis;

a flexible core having a first and a second end, the first end being integral with said stem; and

bristles implanted radially in said core, the ends of the bristles defining the surface of the brush,

wherein a meridian plane of the brush including the main axis intersects with the surface of the brush to define two meridian lines, and wherein the core is curved along its length, and one of said meridian lines at a first portion of the surface is substantially straight in a direction parallel to the main axis.

96. The brush according to claim 95 , wherein the core is at a center of each cross- section defined by the intersection of the surface of the brush with a plane perpendicular to the core.

97. The brush according to claim 95 , wherein the surface of the brush comprises a second portion at the other of said meridian lines, said surface at the second portion having a maximum curvature.

98. The brush according to claim 97 , wherein the curvature of the meridian lines increases continuously from the first portion to the second portion.

99. The brush according to claim 95 , wherein the surface of the brush has a single straight portion.

100. The brush according to claim 95 , wherein the surface of the brush has a single line of maximum curvature.

101. The brush according to claim 97 , wherein the first portion and the second portion are diametrically opposite one another with respect to the core.

102. The brush according to claim 96 , wherein the bristles of each of said cross- sections are all of the same length.

103. The brush according to claim 95 , wherein the ends of the core are aligned with the main axis.

104. The brush according to claim 95 , wherein the core is formed by two branches of a helically wound metal wire bent in the form of a U.

105. The brush according to claim 104 , wherein the core is wound with a left- hand pitch.

106. The brush according to claim 95 , wherein the surface of the brush has substantially the shape of an elongate banana.

107. The brush according to claim 95 , wherein the bristles include alternate rows of short and long bristles, only the long bristles being taken into account for defining the surface of the brush.

108. A brush according to claim 95 , wherein the surface of the brush does not show any substantially concave portion.

109. A brush comprising:

a core including first and second ends;

wherein a straight line passing through said first and second points defines an axis of said brush, and

wherein an intersection of said surface and a first meridian plane including said axis defines a first meridian line segment and a second meridian line segment, said first meridian line segment being substantially straight in a direction parallel to said axis, and said second meridian line segment having convex curvature.

110. The brush according to claim 109 , further comprising a stem on one of said first and second ends of said core.

111. The brush according to claim 110 , wherein said stem is aligned with said axis.

112. The brush according to claim 110 , wherein said stem is on said first end of said core and said second point is located at said second end of said core.

113. The brush according to claim 109 , wherein an intersection of said surface of said brush and a second meridian plane including said axis and being perpendicular to said first meridian plane defines third and fourth meridian line segments, said third meridian line segment being curved.

114. The brush according to claim 113 , wherein curvature of said third meridian line segment is convex.

115. The brush according to claim 113 , wherein said fourth meridian line segment is curved.

116. The brush according to claim 115 , wherein curvature of said third and fourth meridian line segments is convex.

117. The brush according to claim 109 , wherein said core is flexible.

118. The brush according to claim 109 , wherein an intersection of said surface of said brush and a cross- sectional plane defines a cross - section of said brush, said cross - sectional plane including an intersection point along said core and being perpendicular to a line tangent to said core at said intersection point, and wherein bristles defining said surface at said intersection with said cross - sectional plane are of the same length.

119. The brush according to claim 109 , wherein an intersection of said surface of said brush and a cross- sectional plane defines a cross - section of said brush, said cross - sectional plane including an intersection point along said core and being perpendicular to a line tangent to said core at said intersection point, and wherein said core is located in a central portion of said cross - section.

120. The brush according to claim 109 , wherein said core is formed of two helically wound branches of a metal wire.

121. The brush according to claim 120 , wherein said helical winding of said branches has a left- hand pitch.

122. The brush according to claim 109 , wherein said bristles include short bristles and long bristles, and wherein said surface of said brush is defined by the long bristles.

123. The brush according to claim 109 , wherein said surface of said brush has the shape of an elongate banana.

124. A device comprising:

the brush according to
claim 109
; and

a reservoir for containing a product to be applied by the brush.

125. The device according to claim 124 , further comprising a wiper configured to wipe product from the bristles.

126. The device according to claim 124 , wherein the reservoir contains mascara.

127. A method of manufacturing a brush, comprising:

providing a starting brush including

a core including first and second ends, said core being substantially straight, a line extending between two points on said core defining an axis,

wherein an intersection of said surface and a meridian plane including said axis defines a first meridian line segment and a second meridian line segment, said first meridian line segment having convex curvature; and

bending said core of said brush so that at least a portion of said first meridian line segment becomes substantially straight in a direction parallel to said axis.

128. The method according to claim 127 , wherein said second meridian line segment has convex curvature.

129. The method according to claim 127 , wherein said starting brush further comprises a stem on one of said first and second ends of said core.

130. The method according to claim 129 , wherein said stem is on said first end of said core, and wherein the method further comprises bending said first end so that said stem becomes aligned with said axis.

131. The method according to claim 127 , wherein an intersection of said surface of said starting brush and a cross- sectional plane defines a cross - section of said starting brush, said cross - sectional plane including an intersection point along said core and being perpendicular to a line tangent to said core at said intersection point, and wherein said core is located in a central portion of said cross - section.

132. The method according to claim 127 , wherein said surface of said starting brush is symmetrical about a plane including said axis.

133. The method according to claim 127 , wherein said surface of said starting brush is symmetrical about a cross- sectional plane including an intersection point along said core and being perpendicular to a line tangent to said core at said intersection point.

134. The method according to claim 127 , wherein an intersection of said surface of said starting brush and a cross- sectional plane defines a cross - section of said starting brush, said cross - sectional plane including an intersection point along said core and being perpendicular to a line tangent to said core at said intersection point, and wherein said cross - section of said starting brush is disk - shaped.

135. The method according to claim 127 , wherein said surface of said starting brush is in the shape of a rugby ball.

136. The method according to claim 127 , wherein said surface of said starting brush is in the shape of a rugby ball having a plurality of substantially flattened faces.

137. The method according to claim 127 , wherein an intersection of said surface of said starting brush and a cross- sectional plane defines a cross - section of said starting brush, said cross - sectional plane including an intersection point along said core and being perpendicular to a line tangent to said core at said intersection point, and wherein said cross - section of said starting brush is in the shape of a triangle with rounded corners.

138. The method according to claim 128 , wherein curvature of said core after said bending is substantially the same as curvature of said second meridian line segment before said bending.

139. A brush manufactured according to the method of claim 127 .

140. A brush manufactured according to the method of claim 134 .

141. A brush manufactured according to the method of claim 135 .

142. A brush manufactured according to the method of claim 136 .

143. A brush manufactured according to the method of claim 137 .

144. A brush comprising:

a core including first and second ends, said core being curved along a length of said core;

a stem defining an axis of the brush, said stem being on one of said first and second ends of said core; and

bristles extending radially from said core and being located along said core, said bristles having ends defining a surface of said brush;

145. The brush according to claim 144 , wherein an intersection of said surface of said brush and a second meridian plane including said axis and being perpendicular to said first meridian plane defines third and fourth meridian line segments, said third meridian line segment being curved.

146. The brush according to claim 145 , wherein curvature of said third meridian line segment is convex.

147. The brush according to claim 145 , wherein said fourth meridian line segment is curved.

148. The brush according to claim 147 , wherein curvature of said third and fourth meridian line segments is convex.

149. The brush according to claim 144 , wherein said core is flexible.

150. The brush according to claim 144 , wherein an intersection of said surface of said brush and a cross- sectional plane defines a cross - section of said brush, said cross - sectional plane including an intersection point along said core and being perpendicular to a line tangent to said core at said intersection point, and wherein bristles defining said surface at said intersection with said cross - sectional plane are of the same length.

151. The brush according to claim 144 , wherein an intersection of said surface of said brush and a cross- sectional plane defines a cross - section of said brush, said cross - sectional plane including an intersection point along said core and being perpendicular to a line tangent to said core at said intersection point, and wherein said core is located in a central portion of said cross - section.

152. The brush according to claim 144 , wherein said core is formed of two helically wound branches of a metal wire.

153. The brush according to claim 152 , wherein said helical winding of said branches has a left- hand pitch.

154. The brush according to claim 144 , wherein said bristles include short bristles and long bristles, and wherein said surface of said brush is defined by the long bristles.

155. The brush according to claim 64 , wherein said surface of said brush has the shape of an elongate banana.

156. A device comprising:

the brush according to
claim 144
; and

a reservoir for containing a product to be applied by the brush.

157. The device according to claim 156 , further comprising a wiper configured to wipe product from the bristles.

158. The device according to claim 157 , wherein the reservoir contains mascara.

159. A method of manufacturing a brush, comprising:

providing a starting brush including

a core including first and second ends, said core being substantially straight,

a stem defining an axis, said stem being on one of said first and second ends of said core, and

bristles extending radially from said core and being located along said core, said bristles having ends defining a surface of said starting brush, and

bending said core of said brush so that at least a portion of said first meridian line segment becomes substantially straight in a direction parallel to said axis.

160. The method according to claim 159 , wherein said second meridian line segment has convex curvature.

161. The method according to claim 159 , wherein said stem is on said first end of said core, and wherein the method further comprises bending said first end of said core so that said second end of said core becomes aligned with said axis.

162. The method according to claim 159 , wherein an intersection of said surface of said starting brush and a cross- sectional plane defines a cross - section of said starting brush, said cross - sectional plane including an intersection point along said core and being perpendicular to a line tangent to said core at said intersection point, and wherein said core is located in a central portion of said cross - section.

163. The method according to claim 159 , wherein said surface of said starting brush is symmetrical about a plane including said axis.

164. The method according to claim 159 , wherein said surface of said starting brush is symmetrical about a cross- sectional plane including an intersection point along said core and being perpendicular to a line tangent to said core at said intersection point.

165. The method according to claim 159 , wherein an intersection of said surface of said starting brush and a cross- sectional plane defines a cross - section of said starting brush, said cross - sectional plane including an intersection point along said core and being perpendicular to a line tangent to said core at said intersection point, and wherein said cross - section of said starting brush is disk - shaped.

166. The method according to claim 159 , wherein said surface of said starting brush is in the shape of a rugby ball.

167. The method according to claim 159 , wherein said surface of said starting brush is in the shape of a rugby ball having a plurality of substantially flattened faces.

168. The method according to claim 159 , wherein an intersection of said surface of said starting brush and a cross- sectional plane defines a cross - section of said starting brush, said cross - sectional plane including an intersection point along said core and being perpendicular to a line tangent to said core at said intersection point, and wherein said cross - section of said starting brush is in the shape of a triangle with rounded corners.

169. The method according to claim 159 , wherein curvature of said core after said bending is substantially the same as curvature of said second meridian line segment before said bending.

170. A brush manufactured according to the method of claim 159 .

171. A brush manufactured according to the method of claim 165 .

172. A brush manufactured according to the method of claim 166 .

173. A brush manufactured according to the method of claim 167 .

174. A brush manufactured according to the method of claim 168 .

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