Claims
- 1. A method of producing a single-edged safety razor blade tool having a cutting edge and an opposed non-cutting edge, the method comprising the steps of:injecting a substantially rigid thermoplastic in a viscous state into a mold cavity of an injection-molding device shaped to form a protective cover part for a razor blade; allowing the substantially rigid thermoplastic in a viscous state to solidify; injecting a thermoplastic rubber in a viscous state into the mold cavity of the injection-molding device, the thermoplastic rubber being compatible with the substantially rigid thermoplastic; allowing the thermoplastic rubber to solidify, thereby forming a first cover part comprising an inner layer and an outer layer, the inner layer comprising the substantially rigid thermoplastic and the outer layer comprising the compatible thermoplastic rubber covering the inner layer; forming a second cover part, which is substantially identical and complementary to the first cover part; and attaching the first cover part and the second cover part to the non-cutting edge of the safety razor blade.
- 2. The method of claim 1, in which the step of forming the second cover part is simultaneous with the steps for froming the first cover part.
- 3. The method of claim 1, wherein the attaching step comprises attaching the first cover part and the second cover part to each other by ultrasonic welding.
CROSS-REFERENCE TO RELATED APPLICATIONS
This application is a divisional of U.S. patent application Ser. No. 08/954,692, now U.S. Pat. No. 5,943,781, filed on Oct. 20, 1997, which is a continuation-in-part of U.S. patent application Ser. No. 08/582,388, filed on Jan. 3, 1996, now U.S. Pat. No. 5,771,589, both of which are incorporated by reference herein.
US Referenced Citations (16)
Continuation in Parts (1)
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Number |
Date |
Country |
Parent |
08/582388 |
Jan 1996 |
US |
Child |
08/954692 |
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US |