Crack detection in razor blades

Radiant energy – Invisible radiant energy responsive electric signalling – Infrared responsive

Reexamination Certificate

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Reexamination Certificate

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11014366

ABSTRACT:
Methods are provided for determining the presence of cracks in razor blades during manufacturing. The methods may include, for example, providing a plurality of razor blades in a stack, inducing a current in the stack, and measuring a parameter that is related to the current and indicative of the presence or absence of cracks in the razor blades.

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