| 摘要 |
This accessory for photocopying books, of the type to be slipped underneath the hinge of the book that is to be reproduced, is improved by the following characteristics: the slope is interrupted or accelerated in the region of the peak (5), the profile of the top faces (3) is of variable concavity, the surface is treated to avoid reflections, the asymmetric version comprises a stabilising foot, and the wedge may be made from a different material than the transparent material employed, and hinged horizontally or vertically for easy storage. Its small size and especially its low height enables it to be used on most machines. <IMAGE>
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