Abstract: Complex pigment compositions for the coating of paper, comprising an aqueous phase, at least one pigment of mineral origin, a binding agent, optionally various customary additives, and a dispersing agent comprised of carboxyl-containing polymers which are water soluble and are converted to form salts. The polymers are obtained by known polymerization processes. The dispersing agent(a) has a specific viscosity (measured on the sodium salt) of between 0.25 and 2; and(b) is converted to the salt form to the extent of at least 60% by at least one salt-forming agent which has a polyvalent function.These complex pigment compositions have very low viscosities. They may also simultaneously contain diverse pigments, such as kaolin, titanium dioxode, and calcium carbonate, without suffering the usual increase in viscosity and the risk of setting.

Abstract: The device makes it possible to connect tightly first and second parts having a flange and locking or tightening means for the said flanges. The tightening or locking force applied to the locking of tightening means is multiplied in order to increase the compression force applied to a gasket or joint. Each flange has a conical surface of axis D and angle .lambda.. The device has two clips, each of which has a conical surface of axis D and angle .mu., as well as an intermediate member in the form of a ring constituted by several interconnected segments and having an inner surface and an outer surface. Each inner peripheral surface has a conical surface of axis D and angle .lambda. able to cooperate with the conical surface of axis D and angle .lambda. of the first and second parts. Each outer peripheral surface has a conical surface of axis D and angle .mu. able to cooperate with the conical surfaces of angle .mu. of the clips.

Abstract: A device for the tight connection of a first part to a second part in a direction D.It comprises a first member having a first conical surface of axis D and angle .lambda., a second member having a second conical surface of axis D and angle .mu. and a third member having a third planar surface perpendicular to axis D at least one intermediate member, at least one of the three members being connected to the first or second part. The device also has means for bringing together the first and second members.