Abstract: The invention relates to a filter system with a gas space opening, intended to be fitted in artificial anus drainage bags. This filter system is composed of a flattened oblong body comprising a core sheet, for example of open-cell expanded plastic material, impregnated with an adsorbent active material and covered by a protective film leaving free the end edges of the core sheet.

Abstract: An improved clamp is provided for closing a body waste collecting bag, molded from a plastic material piece and comprising two two legs hinged together about a film hinge, said legs being formed so as to clamp therebetween, in the operating condition, the films or sheets forming the collecting bag on the free emptying edge thereof, with removable means for immobilizing the legs with respect to each other, said legs with substantially rectangular flat contour being formed as the male and female parts of a resilient grip engagement coupling, said leg formed as the female part has a cross section somewhat in the form of a C with resiliently deformable wings, the leg formed as the male part has a partially conjugate cross section, and said legs defining simultaneously, at their end opposite the hinge end, a safety means also being of resilient grip type.