Abstract: An epilation apparatus is provided having at least one pair of rotatably mounted epilation rollers (3, 4), which are arranged in the region of an opening (2) provided in the housing (1) of the apparatus, are rotatingly drivable in opposite directions and cooperate with one another at their periphery. Associated with the epilation apparatus is a skin protection device, which is arranged in the region of the opening (2), partially covering the epilation rollers (3, 4) and through which the hairs reach the epilation rollers (3, 4) the skin protection device is a strip-shaped web (11) of wave-shaped design in relation to the longitudinal extension of the epilation rollers, (3, 4) the web, has wave troughs (9) and wave crests (10) alternately on both sides and is comb-like on both sides.

Abstract: A depilation apparatus is provided comprising at least one pair of circumferentially cooperating depilation rollers (3, 4, 5, 6) which are arranged at the location of an opening (2) in the apparatus and which are rotatably supported and arranged to be driven in opposite directions of rotation, and also comprising a shear plate (11) which is arranged at the location of the opening in the apparatus, which covers the depletion rollers, and which is formed with elongate hair-entry apertures (12, 13, 14, 15, 16, 17) at the location of the depilation rollers, the elongate hair-entry apertures in the shear plate extending in the longitudinal direction of the depilation rollers and at least up to the ends of the depilation rollers.

Abstract: In a shaving head (4) for a dry-shaving apparatus comprising a shaving-head frame (5) for detachably mounting an arcuate shear foil (6) which at both ends of at least one of its two longitudinal edges (7, 8) comprises projections (11, 12, 13, 14) associated with slots (22, 23) in the adjacent side walls (20, 21) of the shaving-head frame, into which slots the projections can be inserted when the shear foil is mounted on the shaving-head frame, the shear foil being secured to the shaving-head frame by means of at least one raised portion (26, 27, 28) which comprises at least one ramp (29) which is upwardly inclined in the direction of insertion, which projects from the shaving-head frame, and which engages beneath the relevant longitudinal edge of the shear foil, at least one such raised portion on the longitudinal member of the shaving-head frame adjacent the relevant longitudinal edge of the shear foil is arranged at a distance from the slots in the side walls of the shaving-head frame which constitute the l

Abstract: A diffuser for introducing gas in bubbles into liquid held in an aeration tank comprising a body member having a backing surface and passaging extending from a gas inlet to an outlet at the backing surface, and a flexible, gas permeable membrane covering the backing surface and secured at its periphery to the body member in sealing relationship thereto. The membrane is adapted to distend and move away from the backing surface upon delivery of gas under pressure to diffuser, with the gas flowing through the distended portion of the membrane and into the liquid in the form of relatively small gas bubbles, and adapted to collapse into engagement with the backing surface when gas under pressure is not delivered to the diffuser. A check valve comprising a movable valve member on the membrane and a valve seat on the backing surface enables flow of gas into the space between backing surface and the membrane, and blocks flow of liquid into the passaging in the body member.

Abstract: A diffuser for introducing gas in bubbles into liquid held in an aeration tank comprising a body member having a backing surface and passaging extending from a gas inlet to an outlet at the backing surface, and a flexible, gas permeable membrane covering the backing surface and secured at its periphery to the body member in sealing relationship thereto. The membrane is adapted to distend and move away from the backing surface upon delivery of gas under pressure to diffuser, with the gas flowing through the distended portion of the membrane and into the liquid in the form of relatively small gas bubbles, and adapted to collapse into engagement with the backing surface when gas under pressure is not delivered to the diffuser. A check valve comprising a movable valve member on the membrane and a valve seat on the backing surface enables flow of gas into the space between backing surface and the membrane, and blocks flow of liquid into the passaging in the body member.

Abstract: In magnetic recording media consisting of a non-magnetic base and, bonded on top of this, one or more magnetizable layers based on magnetic material finely dispersed in a polymer binder, a lubricant and further conventional additives, the lubricant used is a triethanolamine esterified with oleic acid.

Abstract: A process for the production of magnetic recording media by applying a magnetic layer, which consists essentially of magnetic material finely dispersed in organic polymers, to one side of a flexible base, and applying a non-magnetizable backing coating which is free of inorganic solids to that side of the base which is opposite the magnetic layer, wherein the backing coating consists of two or more polymers which are incompatible with one another and have precipitated from a solvent mixture, and magnetic recording media produced by this process.

Abstract: Magnetic recording media are produced by preparing a dispersion consisting of finely divided magnetic material, a dispersant, the conventional additives and a solution or a dispersion of a polymeric binder, applying the dispersion in the form of a layer onto a non-magnetizable base, orienting the anisotropic magnetic material by means of a magnetic field and drying the applied layer, by a process in which the dispersant employed is obtained by reactingA. from 70 to 95 parts by weight of a reaction product ofI. from 0.5 to 1.5 moles of an oxoalcohol of 6 to 20 carbon atoms,II. from 6 to 18 moles of ethylene oxide andIII. from 2 to 10 moles of propylene oxide, withB. from 5 to 30 parts by weight of a polyphosphoric acid having a P.sub.2 O.sub.5 content of from 80 to 88%.

Abstract: Magnetic recording media are produced by dispersing timely divided anisotropic magnetic material in a polymeric binder to a non-magnetizable base.

Abstract: A dry-shaving apparatus comprises a shear-shaving section having a first head member formed by an arcuate flexible shear foil providing a working surface, such shear-shaving section including a plurality of reciprocatingly drivable cutters co-operating with the flexible shear foil. Included is a comb-shaving section having a second head member constructed as a rigid trough-shaped part fixedly and permanently connected to the flexible shear foil and provided with a working surface, such comb-shaving section including a reciprocatingly drivable rigid cutter co-operating with the rigid trough-shaped part. The first head member and the second head member together constitute a head-member unit. A cutter unit co-operates with the head-member unit and includes a reciprocatingly drivable support for supporting and driving the cutters of the respective shaving sections.

Abstract: Magnetic recording media are produced by dispersing finely divided anisotropic magnetic material and conventional additives in a solution of a polymeric binder in an organic solvent, or in an aqueous dispersion of a polymeric binder, adding a polymer based on hydrophilic ethylenically unsaturated compounds to the magnetic dispersion, applying a layer of the dispersion to a non-magnetizable base, orienting the anisotropic magnetic material in a magentic field and drying the applied layer.

Abstract: The invention provides a process for the performance and control of chemical or biochemical process cycles in two or a plurality of series-connected reaction stages or basins, with which gassing of a fluid is controllable. The process provides for a recirculation of the fluid between reaction stages or basins in that the basins are preferably arranged concentrically to one another, can be charged selectively, and have at least one connection between one another through which the fluid passes so that the contents of the basins are caused to assume a horizontal rotational flow. Recirculation of the fluid is provided by overflow dams, wall openings, or other devices.

Abstract: Magnetic recording media are produced by a method wherein a fluid dispersion of finely divided magnetically anisotropic material in a film-forming binder mixture containing a polyurethane (obtained from a polyester which possesses free hydroxyl groups, and a di- or polyisocyanate) is applied to a non-magnetic base and the magnetic layer is then hardened.

Abstract: A process for the manufacture of a magnetic recording medium by producing a dispersion of a finely divided anisotropic magnetic material and conventional additives in a solution of a polymeric binder in an organic solvent, applying a layer of the dispersion to a nonmagnetizable base material, then orienting the anisotropic magnetic material by means of a magnetic field, and drying the layer, wherein a compound of the formula (I) ##STR1## where R.sup.1 is straight-chain or branched akyl of 2 to 10 carbon atoms, cycloalkyl of 6 to 10 carbon atoms or aralkyl of 7 to 14 carbon atoms and R.sup.2 is hydrogen or one of the radicals given in the definition of R.sup.1, is added to the dispersion.