FiledWednesday, 13th August 1952
PublishedTuesday, 15th February 1955
InventorCharles E. Butlin
OwnerAmerican Safety Razor Corporation
Parts not referenced in the text: None
Parts not referenced in the images: None
This invention relates to injector razors and has for its object the provision of means for preventing distortion of the razor by the injector before or after injection of a blade, or at any rate for lessening the possibility of such distortion.
The injector razor in common use today comprises a back plate terminating in a forwardly extending blade clamping cap, and a blade platform and guard with a cam plate depending from the rear edge of the platform articulated to the back plate and held with the blade platform in contact with the cap and the back plate by means of a spring, the whole being mounted on a handle. A blade stop is provided at either end of the guard. The blade being slightly wider than the blade platform is clamped on the platform between the stop and the back plate and under the cap by the spring pressure. Blades are fed to such a razor from an injector magazine which is provided with a forwardly extending cam finger designed to be inserted between the cam plate and the back plate and by moving the cam plate forward, to release the spring pressure upon the blade, whereupon the topmost blade of a stack of sharp blades in the magazine is fed forward between the cap and the platform, discharging the dull blade as the sharp one moves into shaving position. The rear edge of the incoming blade slides along the back plate so that its forward sharp edge is not dulled by rubbing against the near stop which has been moved forward by the cam finger.
Careless or ignorant users sometimes twist the injector magazine after the cam finger has been inserted between the cam plate and the back plate, and this twisting may proceed so far as permanently to bend and distort the spring to such an extent as to destroy the usefulness of the razor. In accordance with the present invention I provide rigid means limiting the separation of the cam plate and back plate, thus protecting the spring against distortion.
In the accompanying drawings I have illustrated a preferred embodiment of my invention. In these drawings:
The injector razor illustrated in these drawings comprises a handle
The injector blade magazine
The description so far is applicable to injector razors generally and is specifically applicable to the injector razor shown in Patent No. 2,666,257, granted to me on January 19, 1954. Now with the tongue
1. An injector razor comprising a blade platform, a cam plate depending from the platform, a blade-clamping cap overlying the platform, a back plate depending from the cap, a spring pressing the platform toward the back plate to clamp a blade in shaving position, the cam plate and back plate being separable against the pressure of the spring by the insertion between them of the finger of an injector blade magazine to permit removal of a dull blade and injection of a new one, and a stop on said back plate to limit the separation of the cam plate and the back plate.
2. An injector razor comprising a blade platform, a cam plate depending from the platform, a blade-clamping cap overlying the platform, a back plate depending from the cap, a spring pressing the platform toward the back plate to clamp a blade in shaving position, the cam plate being separable from the back plate against the pressure of the spring by the insertion between them of the finger of an injector blade magazine to permit removal of a dull blade and injection of a new one, and a rigid stop projecting from the back plate to a point in front of the cam plate limiting the movement of the latter away from the back plate to prevent undue distortion of the spring.
References Cited in the file of this patent
United States Patents
1,969,945 Rodrigues Aug. 14, 1934
2,058,633 Rodrigues Oct. 27, 1936
2,132,798 Muros Oct. 11, 1938
2,444,105 Miller June 29, 1948