Abstract: A magnetic brush developing device for developing an electrostatic charge image comprises a hopper for containing toners to be supplemented, a toner supplying roller rotatably mounted in a lower opening of the hopper and provided at its periphery with a longitudinal recess for receiving therein a given amount of toners from the hopper and means for limiting a length of the opening, through which toners are supplemented, along an axis of the roller, so as to make the length of the opening smaller than a maximum width of an electrostatic charge image to be developed by the developing device.

Abstract: A method of obtaining a number of copies transferred from one electrostatic latent image produced on an electric charge carrying member coated on an electrically conductive transfer body is disclosed. The method comprises the successive steps of producing an electrostatic latent image charge on the transfer body, developing the electrostatic latent image charge into a toned picture image, applying a bias voltage between an electrically conductive screen arranged near a transfer receiving medium made in contact with the transfer body on the one hand and the transfer body on the other hand and at the same time charging the transfer receiving medium through the electrically conductive screen with a corona source of ions. The method can transfer the electrostatic latent image produced on the transfer body to the transfer receiving medium without damaging the electrostatic latent image at a high speed with a high efficiency.

Abstract: An electrophotographic apparatus comprises an electrostatic charge retentive drum composed of a metal cylindrical body and a photosensitive or insulating charge retentive layer applied on the cylindrical body. A corona charger serves to homogeneously change the charge retentive layer, and an optical system projects an optical image of a document to be copied onto the charge retentive layer so as to form a latent image. The latent image is developed with toners into a toner image and transferred onto a paper. The toner image is fixed on the paper and the whole surface of the charge retentive layer is cleaned.The electrophotographic apparatus allows selective application of a transfer bias voltage to so as to prevent at least partially undesired charge from being deposited on the charge retentive layer. The transfer bias voltage is applied only when the paper exists in the transfer region.

Abstract: An electrostatic latent image developing device capable of converting an electrostatic latent image to a visible image with the aid of a toner containing magnetic material is disclosed. The device comprises means for making the moving speed of the toner higher than the travelling speed of the electrostatic latent image.

Abstract: A wet developing stationary electrode for wet-developing an electrostatic latent image produced on a record sheet. The electrode is provided at that surface thereof which is opposed to the electrostatic latent image produced surface of the record sheet with a number of strip-shape electrodes acting as developing electrodes and extending along two directions symmetrically inclined with respect to the advancing direction of the record sheet, the rear ends of the strip-shaped electrodes, viewed in the advancing direction of the record sheet, being divergent toward the front ends thereof.

Abstract: A device for developing an electrostatic latent image produced on a record sheet by means of electrically charged particles dispersed in a developing liquid. The device comprises at least one pair of developing and squeezing rollers and a plate-shaped perforated fixed electrode. The rollers are arranged in a path along which travelled the record sheet and the fixed electrode is arranged in front and at the rear of the rollers.

Abstract: A sealing composition which can be suitably used for sealing a panel and a funnel of a color television tube is disclosed. The composition consists essentially of 60 - 99 wt.% of low melting devitrifiable glass powder, 1 - 35 wt.% of lead titanate powder and 0 - 5 wt.% of zircon powder. The glass powder has a composition of 77 - 83 wt.% of PbO, 7 - 10 wt.% of B.sub.2 O.sub.3, 7 - 12 wt.% of ZnO and 1 - 3 wt.% of SiO.sub.2.

Abstract: A device for developing a latent image produced on a record sheet by an effect of electrostatic charge by charged particles dispersed in a developer solution is disclosed. The device comprises a tank containing the developer solution and at least one pair of opposed rollers immersed in said developer solution at an intermediate region of said tank, said opposed rollers being passed by the record sheet therebetween and arranged closely adjacent to the record sheet.

Abstract: A wind instrument having a tone color produced from sound producing reeds in response to the blowing of breath through a mouthpiece, is played by manipulating keys arranged to produce notes of the scale in the same manner as a conventional classical wind instrument such as a clarinet, saxophone, trumpet or french horn, as the case may be. The instrument is constructed with a main body of the wind instrument, a plurality of scale operations keys, air passageway change-over valves, a plurality of groups of sound producing members which produce tones in correspondence to finger action of the scale operation keys, and a mechanism for forming the air passageway to introduce air blown in from a mouthpiece of the wind instrument by the operations of a corresponding air passageway change-over valve into the corresponding sound producing member.

Abstract: A glass composition which possesses a chemical resistance. The glass composition consists essentially ofSiO.sub.2 : 45 - 65 wt.%ZrO.sub.2 : 10 - 20 wt.%Cr.sub.2 O.sub.3 : 0 - 5 wt.%SnO.sub.2 : 0 - 5 wt.%Ro: 0 - 18 wt.%R'.sub.2 o: 0 - 18 wt.%So.sub.3 : 0.05 - 1 wt.%Wherein the sum of contents of Cr.sub.2 O.sub.3 + SnO.sub.2 is 0.5 - 10 wt.%; the sum of contents of ZrO.sub.2 + SnO.sub.2 + Cr.sub.2 O.sub.3 is 12 - 25 wt.%; RO is selected from the group consisting of CaO, MgO, ZnO, BaO, and SrO; and R'.sub.2 O is selected from the group consisting of K.sub.2 O of 0 - 5 wt.%, Na.sub.2 O of 0 - 18 wt.% and Li.sub.2 O of 0 - 5 wt.%.

Abstract: This invention relates to a musical instrument operated by keys which in turn actuate change-over switches for selecting a predetermined one of a series of sound generators. The switches are provided by a composite structure constituted of aligned panels which carry the switch contact, the movable arms of which are operated by the keys.

Abstract: Here is disclosed a liquid crystal cell comprising a juxtaposed couple of planar elements at least one of which is transparent and a liquid crystal material interposed between said planar elements and sealed around the edges thereof, said cell being thermally and chemically stable, hermetically sealed and uniformly spaced, due to the use of low-melting glass as a sealant or a sealant-spacer.

Abstract: An electrically isulating coating glass suitable for fusing or coating an electroconductive material in multi-layer circuits which contains the following components:percent by weight SiO.sub.2 25-48 Al.sub.2 O.sub.3 8-24 PbO 0.5-40 TiO.sub.2 5-25 CaO 4-20 ZrO.sub.2 0-5 ZrO.sub.2 +TiO.sub.2 5-25 ZnO 0-20 PbO+ZnO 0.5-40 Sb.sub.2 O.sub.3 0-3 Bi.sub.2 O.sub.3 0-3 CdO 0-3 SrO 0-3 MgO 0-3 PbF.sub.2 0-3 Bi.sub.2 O.sub.3 +CdO+SrO+MgO+PbF.sub.