Patent ID: 11858156
Assignee: DORCO CO., LTD.
Field: Machine tools (Mechanical engineering)
Classification: CPC B | IPC B

Claim 13:
14. A razor cartridge, comprising:
a blade housing comprising a guard, a cap, and at least one cutting blade disposed between the guard and the cap; and
a lubricating strip disposed on at least one of the guard or the cap,
wherein the lubricating strip comprises:
a first layer comprising a first lubricating material having a first color; and
a second layer disposed under the first layer and comprising a second lubricating material having a second color different from the first color,
wherein the first layer and the second layer are configured to:
form at least one boundary line, which is not parallel to a straight line along a width direction of the lubricating strip, on a cross-section of the lubricating strip cut in a direction perpendicular to a longitudinal direction of the lubricating strip; and
define multiple shaving layers including a first shaving layer comprising the first layer, a second shaving layer comprising the first layer and the second layer, and a third shaving layer comprising the second layer, the multiple shaving layers being arranged along a straight line parallel to a height direction of the lubricating strip, and
wherein:
a thickness of the first shaving layer is less than a thickness of the second shaving layer in the height direction of the lubricating strip,
the thickness of the second shaving layer is defined as a distance in the height direction of the lubricating strip between the highest point and the lowest point of the at least one boundary line,
a top exposure surface of the lubricating strip is configured to display the first color alone when the lubricating strip has not been used,
the second color is displayed on the top exposure surface of the lubricating strip when the lubricating strip has been used at least once,
in the second shaving layer, a sum of widths in the width direction of one or more areas of the second layer exposed on an upper surface of the lubricating strip is configured to increase as the lubricating strip is worn,
the first lubricating material and the second lubricating material are different from each other,
the at least one boundary line forms a plurality of protrusion profiles, and respective heights of peaks of the protrusion profiles are different from each other,
as the peaks of the protrusion profiles are sequentially exposed, a number of longitudinally elongated exposed strips having the second color increases, and a respective width of each of the exposed strips increases,
a number of the peaks is at least three, and
each of the protrusion profiles has a shape of an isosceles triangle.