| 摘要 |
The device according to the present invention consists of two independent frames, a fix one (3) and a mobile one (2), so as to obtain a re-framing process in which the calibrated-spring jacks (4) of the fix frame (3) push outwardly the independent rods of the mobile frame (2), corresponding to the sides of the perimeter of the painting (1), keeping it always stretched whatever its temperature and moisture is. |
