| 摘要 |
<p>The main patent concerned a porous mould for glass, from which the finished glass moulding was to be separated with the aid of a pulsed presS. medium. Air is now proposed as the medium. In contrast, to known methods in which a cusion of gas is used to prevent the glass touching the mould, the pulsed air will, in the present instance, first be used as a suction medium to draw the glass down into the mould. Only later will it be used as a press. medium to held release the finished moulding from the opened mould.</p> |
