| 摘要 |
In-line razor-blade shaving devices feature two sets of razor blade strips pointing inwardly in opposite directions. The devices are designed for safely and rapidly shaving hair from large body portions such as legs and arms. Each device features an elongated handle arranged in line with an elongated bi-directional razor blade head. Each set of razor blade strips in the head may be provided with one or more straight razor-sharp edges, which point in the same direction, while the blade edges of the two sets point inwardly toward from one another, generally in opposite directions. The edges of blade strips of the two sets may be arranged in one common working plane, or each set may be in its own working plane, with the planes at an angle to one another. The working planes are defined by the elongated front and rear guard surfaces of the blade-edge guarding system on the face of the razor head. These guard surfaces contact a user's skin before and after the razor-sharp edges to help ensure safe shaving. The bi-directional head may be constructed in a variety of ways, including in a molded form, in an assembled form, as a replaceable bi-directional cartridge, and as two separate uni-directional razor blade heads arranged in close proximity to one another. These in-line bi-directional razor blade shaving devices represent a new family of wet shaving razor devices. They each can be used with a minimum of effort by sliding the razor blade head back and forth along the skin to be shaved, with shaving occurring in both directions. Some embodiments have two distinct working planes on the head of the shaving device. To use them, the user's wrist rotates at the end of each stroke (or at the beginning of the next stroke), to bring the other working plane, not currently on the skin, into engagement with the skin for the next stroke in the opposite direction.
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