| 摘要 |
An automatic press for tire retreading is described which comprises a basic fixed stamp or mold, a plurality of movable radial sectors cooperating with the stamp or mold, and a vertical axis frame jointed to the fixed stamp. The frame is substantially shaped as a double bell and has a suitable radial opening. Along the edges of the frame, the perimetrical borders of a band which is comparable to an opened air tube, are fixed by means of annular elements; the air tube is blown-up through the air space defined by the bell frame by means of a valve. A suction valve which allows the air to be exhausted from the chamber without the necessity of providing for a pump is also provided. |
