| 摘要 |
The invention solves an improvement of method and apparatus for area-stretching of leathers which re inserted between two resilient belts with which they are alternatively and cyclically either moved (fed between a set of deepenings and a set of pulling studs, wither stretched by causing of reversible shifting (pushing-in) of said pulling studs into said opposite depenings. The improvement is reached as follows: Before beginning of each stretching cycle both the resilient belts, commonly with treated leather, are mutually clamped, one opposite to the other, at peripheral places of the deepenings and before the resilient belts subsequently shift, their clamping is released. Between pulling studs (21) there are mounted resilient plates (22) and oppositely to them, on peripheries of the deepenings (30), there are provided contact planes (31r) which are parallel to the shifting plane (o) of the resilient belts (4, 5). Except these distinguishing signs of the present invention there exist also further possible variances. The present invention can be used for area-stretching of leathers. |
