| 摘要 |
<p>A mixture of air, paper stock made from recycled paper, foaming agents and surfactants are injected into a pressurized container (22). The container has a stock inlet (23) at an end opposite a stock outlet (50), and three outlets (38, 58, 68) arranged along the top of the container between the stock inlet and the stock outlet. The first top outlet nearest the stock inlet is separated from the second and third outlets by a baffle (44), and the second and third outlets are separated from the stock outlet by a baffle (52). Each outlet has a valve (62, 64, 70) which controls flow from that outlet. By adjusting the outlet valves, foam and waste ink is vented from the first and second outlets from the stock inlet, while stock is vented from the third outlet which is closest to the stock outlet. The stock passing through the third outlet is recycled through the container.</p> |
