| 摘要 |
<p>A suction cup includes a body with a central axis, a first end having an opening, and a second end adapted to be connected to a vacuum source, thereby drawing a vacuum through the opening. A lip is provided on the body, which defines a periphery around the opening. An obstruction element with an exterior surface extends across at last part of the opening. The obstruction element defines a plurality of holes therethrough and presents an exterior surface that is substantially flush with the lip. The obstruction element discourages distortion of a fabric drawn to the suction cup, when the vacuum is applied by the vacuum source, to a degree that exceeds a predetermined, acceptable threshold.</p> |
