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Colored razor blades

A razor and blade technology, applied in the field of color razor blades, which can solve problems such as poor performance and loss of hardness

Inactive Publication Date: 2011-02-02
THE GILLETTE CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the steel is tempered then it will lose its hardness and may not perform well during use

Method used

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  • Colored razor blades
  • Colored razor blades
  • Colored razor blades

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1 to 4

[0057] General color coating process equipment

Embodiment 1

[0060] Nitrogen in high temperature furnace ;

[0061] Dry air in oxidation zone for color control

[0062] In this experiment, the high temperature furnace was kept Figure 4 The temperature distribution curve shown in . The environment in the high temperature furnace is flowing nitrogen (18.9 liters / minute). The coated stainless steel sheet was pulled through the furnace at a speed of 36.6 m / min (120 ft / min). A controlled mixture of nitrogen (1 liter / min) and dry air (0 to 225 ml / min) was introduced to each side of the oxidation zone. The amount of air introduced into the oxidation zone determines the final color of the color coat. The initial color of the sample is blue-gray. If there is no air flow to the oxidation zone, the final color will be purple. When the air flow rate is increased to 25ml / min, the color changes to dark blue. When the air flow rate is greater than 200ml / min, the color is light blue. The use of oxidation zones allows for a fast response co...

Embodiment 2

[0064] Mixed gas in high temperature furnace ;

[0065] Dry air in oxidation zone for color control

[0066] The high temperature furnace contains an environment of flowing mixed gas (75% hydrogen, 25% nitrogen). The flow rate was set between 4.7 L / min and 18.9 L / min. A controlled mixture of nitrogen (1 liter / min) and dry air (0 to 225 ml / min) was introduced to each side of the oxidation zone. The amount of air introduced into the oxidation zone determines the final color of the color coat. During this process, it is believed that the original titanium oxide film is densified, reduced and lightly nitrided. These changes reduce the apparent film index of refraction of the oxide film when the film is inside a high temperature furnace. As the hot film is pulled through the oxidation zone, the enhanced oxygen environment re-oxidizes the film, increasing the apparent film index of refraction and changing the color of the film. For a given film thickness, process responsive...

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Abstract

Colored razor blades are provided. Methods for manufacturing such blades are also provided, including methods involving depositing an oxide coating prior to heat treatment of the blade material and heat treating under conditions selected to enhance the color of the coating.

Description

technical field [0001] This invention relates to razor blades and methods for making razor blades, and more particularly to colored razor blades. Background of the invention [0002] Razor blades are typically formed from sheet metal, such as stainless steel, that is cut to the desired width and heat treated to harden the metal. The hardening operation utilizes a high temperature furnace in which the metal can be placed at temperatures above 1100°C for up to 10 seconds, followed by quenching. [0003] After hardening, a cutting edge is formed on the blade. The cutting edge typically has a wedge-shaped configuration with the final tip having a radius of less than about 0.0001 mm (1000 Angstroms), such as about 0.00002 to 0.00003 mm (200 to 300 Angstroms). [0004] The cutting edge can be coated with various coatings. For example, hard coatings such as diamond, amorphous diamond, diamond-like carbon (DLC) materials, nitrides, carbides, oxides, or ceramics are often applied ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B26B21/60C23C14/06B26B21/14B26B21/54B41M3/12C23C8/00C23C8/10C23C26/00C23C30/00
CPCC21D1/76C23C8/10B26B21/60B26B21/4068C23C30/00C23C8/00C21D11/00C23C26/00C23C14/0015
Inventor K·J·斯克罗毕斯A·博卡洛R·J·斯万森E·刘
Owner THE GILLETTE CO