| 摘要 |
A gripper post cooperates with a gripper finger to grip a sheet therebetween. The gripper post comprises a body and a plurality of raised portions. The plurality of raised portions are distributed throughout a surface of the body and have substantially coplanar contact surfaces for contacting the sheet when the sheet is gripped thereby. The raised portions are defined by valleys surrounding the raised portions and are formed by an electrical discharge machining process.
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