Abstract: The present invention relates to a process and composition for the recovery of fibre from waste paper and paper broke which has been treated with wet-strength resins. Specifically the present invention is directed to the removal of such resins from the fibre material, so that such fibre material may be recycled to a paper web forming process, by using selected persulfates such as potassium persulfate. Optionally, the persulfate is used in combination with a surfactant. Improved repulping of the waste paper is achieved.

Abstract: An electret consisting of a conductive electrode embedded in insulating materials, is provided. In comparison with conventional electrets comprising a dielectric storage member, this electret exhibits a much higher capacity. Moreover it can be manufactured together with an integrated circuit incorporating the structure according to the invention, onto its substrate. For charging the electret an electrolytic process is utilized, if necessary through an opening perforated in the upper insulating layer. In the latter case the metal constituting the electrode can be advantageously be oxidized by anodic oxidation. The lifetime is improved by the oxide layer.

Abstract: Display system using low energy electrons which are produced in the discharge of gases (plasma). For this purpose there is formed a matrix of cells each comprising a cathode, a glass block, hollowed out in its center for receiving a plasma of helium, an assembly constituted by an anode and a luminophore support separated by an insulator, and a grid wire coated with an insulator. The electrons of the plasma excite or do not excite the luminophore, depending on the potential applied to the grid which performs the function of a control electrode and storage element.

Abstract: A transversal filter utilizing a double tapped delay line, is provided. Input samples of analogue signals are successively introduced into a charge transfer device comprising two tapped delay lines using split electrodes. Tap weights of both polarities are provided by collecting portions of split electrodes and summed on a single bus bar connected to a reading system delivering filtered signals.

Abstract: A charge coupled correlator device with two pairs of registers connected in parallel, each register comprising a succession of stages through which charges pass and in each stage at least one phase and output electrode. The electrodes of the second register have small dimensions compared with those of the first. The outputs of two such devices are subtracted to produce a correlation product.