Abstract: A copying machine including a paper sheet deflecting device is disclosed. For compact copying machines an excessively curved sheet deflection is achieved for a space-saving construction. In order to reliably and independently of the type of sheets ensure a deflection with a relatively pronounced curvature, the deflecting device of the new copying machine is constructed as a guiding element which partially surrounds a withdrawal roller and which, while leaving an introducing gap, rests with a predetermined contact force against the circumference of the withdrawal roller. The resulting active contact pressure force on the withdrawal roller for the sheet to be drawn in permits a secure paper transport with a simultaneous deflection with a small radius of curvature.

Abstract: A paper tray arrangement is disclosed for receiving a stack of paper and which is insertable into a receiving device of a copying machine or the like and which includes a supporting plate for the stack of paper and springs applied to the supporting plate to lift the supporting plate off the bottom of the tray. Tensioning apparatus is provided for the springs and a stop of the receiving device is assigned to the tensioning device in such a manner that the spring is tensioned when the paper tray is inserted into the receiving device and is relaxed when the paper tray is taken out of the receiving device.

Abstract: A chain drive arrangement is disclosed for movably driving an exposure carriage of a photocopying machine. The chain drive includes an endless chain running over two spaced apart chain gears. A carrying pin is arranged on the chain which engages into a connecting link slot transversely to the travel direction of the chain. The connecting link slot is arranged at a carrying lever of the exposure carriage. In order to accommodate movement of the exposure carriage to an intermediate or neutral position so it can be removed independently of the position in which the driving mechanism is stopped, a readily manually detachable connection is provided between the carrying pin and the carrying lever. A leaf spring hingedly connects the carrying lever to the exposure carriage and biases the lever to a connection with the carrying pin.

Abstract: A photocopying machine developing apparatus is described in which an adjustable doctor blade is disposed adjacent a shell surrounding a magnetic roller. The doctor blade is guided in a U-shaped slideway with respect to the shell and is displaceable in the radial direction by contact with adjusting screws. The doctor blade is pressed against the adjusting screws by tension springs.

Abstract: A paper holder, especially for a small office type photocopying machine or the like, is provided with two sections disposed one behind the other for respective stacks of paper sheets. The sections of the holder are disposed so that they can be selectively utilized with the one or the other ends of the holder inserted into the copying machine. Paper sheets are fed to the machine from the respective one of the sections inserted into the machine. The other sheet stack which may contain a paper of a different format or a different quality is then held in reserve in the same paper holder. The paper holder is provided with a heater in order to facilitate the drying of both stacks of paper and also so that the stack of paper held in reserve is immediately ready upon its insertion to give error free copying qualities.

Abstract: Guide apparatus is provided for guiding paper from an image toner station to a pair of pressing rolls of a fixing station of a photocopying machine. The pressing rolls are arranged at a slight angle to the transport direction of the paper. In order to provide for simultaneous introduction of the paper across its width to the pressing rolls, the guide apparatus is so configured that the paper has different travel lengths across its width on its travel path between the toner station and the nip of the pressing rolls.

Abstract: The invention relates to a fixing arrangement for fixing toner images in a photocopying machine or the like. The arrangement includes three pressing rolls or rollers disposed substantially in a common plane and supported together at respective bearing blocks. The bearing blocks are formed as respective single parts at the ends of the rolls and form bearing seats for both outer press rolls and a guide for the bearing of the middle press roll.

Abstract: A copying machine and paper supply cassette is provided with a control arrangement to prevent operation of the machine upon improper insertion of the cassette. A control switch mechanism for controlling the electricity supply to the copying machine includes a pivotable control lever having a first arm engageable with catch part of the cassette so that said cassette pivots said control lever as it is inserted into a cassette guide of the machine. The control lever includes a second arm engageable through a second opening in the sidewall of the cassette to permit the pivoting movement of the control lever. The opposite side of the cassette includes no second opening so that insertion of the cassette in an upside down position is prevented.

Abstract: A compact, readily servicable, office photocopying machine is provided which has pivotally connected upper and lower housing parts. A paper cassette receiver for holding a stack of coated photosensitive copying paper sheets is located at the bottom of the lower housing part. The lower housing part also operably supports a charging station, an exposing station, a developing station, and a fixing station arranged above and within the vertical projection of the stack of sheets in the cassette receiver. A sheet separating station for separating individual sheets from the cassette and a paper reversing guide are provided for transferring individual sheets from the cassette to the charging station. The exit end of the paper reversing guide and the separating station are also arranged above and within the vertical projection of the stack of sheets in the cassette receiver. A slide block with a holder for an original to be copied and an optical system are operably supported at the upper housing part.

Abstract: An apparatus for a metered feeding of ink to a ductor roll of an offset printing device. The ductor roll is adapted to be dipped into an ink pool which is connected to a device for supplying metered amounts of ink. The device for supplying the metered amounts of ink is controlled by an installation for monitoring a level of ink in the ink pool. The monitoring installation includes a distance sensor which is constructed as a capacitive proximity switch.

Abstract: A drum for an electrophotographic copier which serves as an intermediate image carrier which drum is rotatably mounted in the copier and includes a takeup roll and a supply roll with photoconducting material, in the form of a web, being guided from the supply roll over a deflection roll outwardly to the surface of the drum and over a second deflection roll to the takeup roll. The takeup roll is adapted to be coupled to a drive motor disposed outside of the drum for a stepwise feed of the photoconducting material. The drum is rotatably mounted by two pins with one of the pins being rotatable circumferentially relative to the drum and being non-rotatably connectable with a gear meshing with a further gear mounted on the takeup roll. The one pivot pin is connected by a freewheel mechanism to a drive motor which, in normal operation, drives another component of the copier with the rotational direction of the drive motor being reversible in order to drive the one pivot pin.

Abstract: A developing station for an electrostatic copier which station includes a magnetic roller connected to a rotary drive and disposed within a stationary sleeve made of a non-magnetizable material. The magnetic roller is adapted to receive a powdered toner, especially a single-component toner along its outer circumference. The stationary sleeve and roller are disposed so that an area of the outer circumference of the stationary sleeve and roller is located opposite an image carrier or an intermediate image carrier which is transported through the developing station past the magnetic roller. At least an outer surface of the sleeve is formed of an electrically insulating material with an insert or covering of an electrically conducting material being provided in the area of the sleeve which is opposite the image carrier or the intermediate image carrier.