| 摘要 |
This invention is an extendable elastic document fastener for fastening from one single document to any amount or thickness required, because its elastic string can be obtained in every length required and its ends can be given a pointed shape to pass them more easily through the documents. Fastening is carried out in a practical and quick manner and without damaging the documents, since one can add or extract documents practically at any time. This fastener is very resistant and adaptable to all types of climates. It will not stain the documents because it is not made of metal. It eliminates the need for stitching and for traditional fasteners, which, as I have learned from experience, damages the documents. It saves time and costs and reduces damages to the documents; it is adequate for conserving any type of archives. It offers the advantage of allowing one to view information printed on the middle of the documents close to the fastener that is not easily accessible, by pulling at the center towards the ends without the risk of tearing the documents, since it is elastic and does not damage the punch holes on the document. To make copies, one need only loosen the string, separate the top plate from the document to be copied, place the string in the fastening tracks, and then open the documents completely as desired.
|
