| 摘要 |
A device for quickly loading a document onto a drum for scanning or other purposes comprises a pair of bandlike spiral springs circumferentially wound around the drum adjacent its ends and exerting an inward force against the surface of the drum. Crossbands extending transversely between the springs hold the document flat against the drum surface under the force of the springs. The springs are each fastened to the drum at one end and are readily unwound from the drum by pulling on their free ends to extend them in a flattened position in which they receive the document for loading onto the drum. On release of the free ends the bands rewind around the drum to position the document against its surface.
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