| 摘要 |
A small hand-held tubular device, utilizes gas under pressure in a replaceable cartridge carried in the device, to be controllably fed to a hollow needle for skinning purposes. The interior of the tubular body of the device is sealed at the end opposite the needle by a screw cap which, when screwed inwardly presses the tip end of the cartridge against a sharp projection inside the body, thereby piercing the tip of the cartridge. The tip of the cartridge seats on a rubber washer surrounding the piercing point which prevents release of gas under pressure from the pierced cartridge to the needle, until the screw cap relieves the pressure exerted thereby on the cartridge. Capillary feed grooves in a disc having the sharp projection, serve to control the rate of flow of the gas to the needle.
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