Memrane filtration device having an improved design

A cross-flow filtration device comprising:

• a retentate plate possessing oppositely facing first and second sides;
• a permeate plate possessing oppositely facing first and second sides;
• a membrane sandwiched between the retentate plate and the permeate plate so that the second side of the retentate plate and the second side of the permeate plate face the membrane;
• the retentate plate comprising a plurality of feed channels each fluidly connected with and extending from a distribution manifold, the plurality of feed channels being located on the first side of the retentate plate;
• the retentate plate also comprising a plurality of drain channels each fluidly connected with and extending from a collection manifold, the plurality of drain channels being located on the first side of the retentate plate;
• each of the feed channels being fluidly connected to one of the drain channels by way of a plurality of first and second through holes that each extend completely through the retentate plate;
• the first through holes being fluidly connected to the feed channel and extending away from the first side of the retentate plate;
• the second through holes extending away from the second side of the retentate plate and opening into the drain channel;
• and
• a plurality of the first through holes possessing an inlet edge at the first side of the retentate plate that is chamfered so that an opening of the first through hole at the first side of the retentate plate possesses an increased cross-section relative to other portions of first through hole.