| 摘要 |
<p>A body is provided with a relatively thick coating of elastic material by first expanding a sleeve (25) of said material, which is closed at one end, under the action of compressed air into engagement with the inner side of a tight casing (10) surrounding said sleeve, while venting the closed space between said sleeve (25) and said casing (10) via a valve (12). By closing the valve (12), the sleeve (25) is maintained in its expanded state, and the body is inserted therein, whereupon air is again admitted into the said space by opening the valve (12) so that the sleeve (25) contracts around and firmly engages the body.</p> |
