Chamber type filter press for de-watering sludges and similar substances

A chamber-type filter press for de-watering a water containing substance comprising:

• a plurality of sequentially disposed fully enclosed filter chambers formed as a continuously advancing belt which are charged and discharged with said substance, said filter chambers being closed on their top and bottom sides by filter bands supported on revolving carrier belts and on their lateral sides with sealing means and at their front and rear, as viewed in the direction of advancement, by the substance to be de-watered;
• input means for feeding said substance between said filter bands and sealing means to form said filter chambers;
• and means for applying a high pressure to said filter chambers to de-water said substance comprising a plurality of pressure applying members which co-advance so as to revolve with and apply pressure to said filter chambers, and a plurality of pressure producers associated with said pressure applying members which co-advance so as to revolve with said filter chambers, each said co-advancing pressure producer originating a pressure and transmitting it to a said pressure applying member, said pressure producers, over at least a portion of the advancement of the filter chambers, causing application of a high pressure to substances contained therein which pressure increases in the direction of filter chamber advancement.