| 摘要 |
<p>A holding apparatus for use in conjunction with a plastic welding machine adapted to lift an article placed therein toward a head assembly having the holding apparatus associated therewith to retain the article in place, the holding apparatus comprising a mounting plate having a face adapted to receive the article, a port extending through the face, a vacuum actuated piston operatively associated with the port, and opposing side plates connected to selected edges of the mounting plate and operatively associated with the piston, which side plates include strips or bands which extend transversely from the side plates toward the mounting plate, and which are adapted to engage selected portions of the article. In use, the article is placed over the mounting plate, covering the port and sealing the vacuum system. The vacuum operated piston is activated, retracting the side plates and engaging selected portions of the article by the strip or band. To release the article, the vacuum is interrupted, deactivating the piston and permitting the side plates to extend to their original, open position.</p> |
