Abstract: An electrophotographic process for printing a number of copies from a single electrostatic charge latent image once formed on a photosensitive member by projecting an optical image of a document to be copied comprises the following successive steps;(a) a step for effecting a uniform primary electrification with one polarity for the photosensitive member;(b) a step for forming on the uniformly charged photosensitive member, a primary electrostatic latent image corresponding to the image of the document by projecting the document image to the photosensitive member;(c) a step for developing the primary latent image with opaque toner particles having charged in the other polarity to form on the photosensitive member a toned image;(d) a step for placing a transfer member over a surface of the photosensitive member on which surface the toned image has been formed;(e) a step for effecting a secondary electrification with the one polarity from a side of the transfer member and for effecting a secondary exposure also

Abstract: In applying a specimen to a carrier pre-wetted with an electrolytic solution, the disclosed applicator electrically measures the wetness of the carrier and controls the application of the specimen to the carrier based on the thus detected wetness so as to ensure uniform application of the specimen to the carrier.

Abstract: An electrophotographic process comprising uniformly charging a composite photosensitive body with a charging polarity exhibiting a response property to a visible light, said composite photosensitive body being composed of a photoconductive semiconductor for producing carrier when illuminated by the visible light and a light transmitting organic photosemiconductor superimposed one upon the other, illuminating the charged composite photosensitive body with a light image by the visible light and producing thereon a first electrostatic latent image and producing thereon a second electrostatic latent image based on said first electrostatic latent image, said second electrostatic latent image having a polarity which is opposite to said charging polarity.

Abstract: A microphone device detachably fitted to acoustic equipments such as tape recorders comprises a body detachably fitted to the acoustic equipment, a flexible cylindrical arm mounted to the body, a microphone provided to the free end of the arm, and a flexible conductor disposed in the hollow space of the arm for electrically connecting the microphone with the body.

Abstract: An electrographic apparatus comprising a photosensitive screen composed of an insulating layer, two electrically conductive layers coated on opposite sides of the insulating layer and a photosensitive layer coated on one of said electrically conductive layers, and a bias electric source connected between the two electrically conductive layers and producing, on a dielectric coated record sheet, an electrostatic latent image corresponding to an image to be reproduced is disclosed. The apparatus comprises means for adjusting a bias voltage supplied from the bias electric source and applied between the two electrically conductive layers.

Abstract: A system for correcting the time base in a fixed type magnetic recording and reproducing apparatus is disclosed.

Abstract: An apparatus for detecting the in-focusing conditions is disclosed. The apparatus comprises a light guide member having light incident end arranged along a plane which is placed at an angle of inclination against a predetermined focal plane of an optical system; a light receiver arranged near a light outlet end of the light guide member and consisting of a plurality of charge transfer elements arranged to receive light from the outlet end as a picture element array; means for deriving illuminance signals from the picture element array of the light receiver; and means for treating the illuminance signals to detect the in-focused position of the optical system.

Abstract: A pad device for use in a tape cassette is disclosed. The pad device comprises a support member of substantially H-shape in cross section provided near a capstan shaft hole, spring members fixed to the support member, at its one end portions, respectively, and pad members adhered to the spring members at its free end portions, respectively.

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: In the cassette disclosed, a cassette housing with magnetic tape has openings at the front surface thereof for receiving a magnetic head, a pinch roller and the like. A pair of tape pad springs for pressing against the head of the openings are integrally formed with the housing.

Abstract: A capstan shaft thrust pad device, for use with a tape cassette having a capstan shaft opening of a certain diameter, includes a bearing having a generally cylindrical upper portion which forms a first bearing surface, the outer diameter of the upper bearing portion being less than the diameter of the capstan shaft opening, and a lower bearing portion forming a second bearing surface parallel to the first bearing surface. A capstan shaft is supported by the bearing for rotation about the shaft axis, the shaft extending through the bearing, perpendicular to the first and second bearing surfaces. A fly wheel is coaxially fixed to the capstan shaft beyond the second bearing surface and the fly wheel has an end surface facing the second bearing surface so as to prevent axial movement of the shaft in one direction. A generally C-shaped thrust pad member is fixed in a groove on the capstan shaft beyond the second bearing surface to prevent axial movement of the shaft in the other axial direction.

Abstract: A photosensitive screen for an electrographic apparatus adapted to modulate a flow of corona ions by an electrostatic latent image produced thereon is disclosed. The photosensitive screen is composed of an electrically conductive mesh which is coated on one side with an insulating layer and an electrically conductive layer superimposed one upon the other in the order as mentioned and coated on the other side with a photosensitive layer.The photosensitive screen comprises further an insulating thin film layer which covers at least the electrically conductive layer for the purpose of protecting it against surrounding atmosphere and hence improving durability thereof.

Abstract: A tape recorder calculator is disclosed. The tape recorder comprises a cassette charging portion thereof on one side surface of a polyhedron of a housing and digit keys on an other side surface. The display for displaying counted values is also used as a counter display of the tape recorder and is rotatably provided on one side surface of the polyhedron so as to automatically switch its display function in accordance with rotation of the display.

Abstract: An electrographic process of producing, on a dielectric coated record medium, an electrostatic copy latent image by modulating a flow of corona ions with the aid of an electrostatic latent image which has been produced on a photoconductive photosensitive screen having a number of openings. The process is characterized by making a ratio K of a maximum surface potential V volts of the electrostatic copy latent image produced on the dielectric coated record medium to an intensity of the electric field E volts/mm established between the photoconductive photosensitive screen and the dielectric coated record medium, i.e. K=V/E smaller than about 0.18 for the purpose of preventing enlargement of dots of the copy picture image.

Abstract: A tape recorder for repeatedly recording and stopping a recording tape by switching an operating button as a recording button is locked during a recording state. The recorder includes an engaging member for making the recording button engageable with the recording state and a releasing member for driving the engaging member to release the engagement of the recording state by providing a detection member for detecting the presence of the tape in a tape loading chamber biased to a predetermined direction and by moving the detection member in the biassed direction. The biased force of the detection member is utilized as a pressure force for determining the tape position.

Abstract: A corona discharge device for electrographic apparatus which makes use of a drum-shaped photosensitive screen. The device is provided with a corona electric field establishing electrode extending in parallel with a corona discharge wire and supplied with an electric potential which is intermediate the electric potential of a field electrode and the electric potential of the corona discharge wire.

Abstract: A wide-angle photographic camera lens system having a very short total length of 2.75 f and a back focal length of 1.33 f comprising a first positive meniscus lens, a second negative meniscus lens, a third positive thick lens, a fourth negative lens, a fifth positive meniscus lens and a sixth positive lens.

Abstract: A speaker device having a holder means for a superminiature tape recorder comprises an external speaker device and a holding member provided integrally to said external speaker device for automatically holding the tape recorder when the tape recorder is placed on the holding member.

Abstract: A pipette exchange apparatus for use in a system for automatically culturing a biotissue or a cell includes a pipette mounting device for mounting a dividing and injecting means, a pipette supply device and a pipette feeding device.

Abstract: A lens system for photographic cameras which has a very short total length and wherein aberrations are favorably corrected. Said lens system comprises a first positive meniscus lens component, a second biconcave lens component and a third cemented doublet component, and said lens system satisfying the conditions enumerated hereunder:(1) 0.23f<.SIGMA.d<0.3f(2) 0.55f<f.sub.1 <0.59f(3) -0.37f<f.sub.2 <-0.32f(4) n.sub.1 >1.71(5) n.sub.2 <1.67(6) .vertline.r.sub.7 .vertline.>4.8f(7) 0.26f <-r.sub.6 <0.34f(8) .vertline.r.sub.3 .vertline./r.sub.4 >6.0(9) .nu..sub.1 -.nu..sub.