Abstract: An apparatus for transporting and tracking a belt arranged to move in a predetermined path and for controlling lateral movement of the belt from the predetermined path comprises a stationary non-rotating arcuate tracking shoe with a belt defining surface for supporting a belt thereon and including vertically oriented flanges at each side of said path defining surface and extending from said path defining surface outwardly to provide belt edge guides. When driving the belt around the tracking shoe the velocity of the belt in the axial direction of the tracking shoe is zero when the belt touches an edge guide. Therefore, the friction force acting on the belt from the tracking shoe in the axial direction approaches zero, thereby helping to keep the total system force applied at the edge guide less than the minimum force necessary to produce buckling of the side of the belt.

Abstract: An apparatus in which lateral movement of a moving belt is controlled so that the belt moves in a pre-determined path. The apparatus includes at least one rotatably mounted roller having an elastic membrane entrained thereabout. The coefficient of friction between the elastic membrane and the roller is low so as to form a low friction interface therebetween. A pair of opposed, spaced flanges constrain the belt. As the belt moves in a lateral direction, one of the flanges engages a side edge of the belt to prevent lateral movement thereof. When the side edge of the belt engages the flange, the elastic membrane slips on the roller when the force applied on the side edge of the belt is greater than the maximum frictional force between the roller and the elastic membrane, in the direction of lateral movement of the belt.

Abstract: An electrophotographic copying system is disclosed wherein the DC charging and DC transfer corotrons are powered with an unfiltered full wave rectified voltage derived from a 110 volt, 60 hertz line source. The DC corotrons are regulated along with AC corotrons used for detack and erase operations. The regulation is achieved by a feedback loop coupled to only one of the corotrons.

Abstract: An electrophotographic copying system is disclosed that employs a mixture of AC and DC corotrons energized by a common power supply. The DC corotrons are energized with an unfiltered, rectified AC voltage derived from the same source as the AC voltage applied to the AC corotrons so that all the corotrons are driven by voltages having a common wave shape. One of the corotrons is regulated by a feedback circuit coupled between the regulated or master corotron and the power supply. The other corotrons track the regulation of the master corotron.

Abstract: A reproducing apparatus including an image support surface such as a rotatable drum upon which an image may be formed and subsequently transferred to a transfer member such as paper is provided with a cleaner housing including a restrictor guide means positioned such that any transfer member remaining tacked to the image support surface as the image support surface enters the cleaner housing will be intercepted before it completely enters the cleaner housing. Preferably the restrictor guide means is used in conjunction with a blade cleaner for cleaning the image support surface and the blade cleaner and restrictor guide means together with the image support surface form a cavity within which a tacked transfer member is intercepted such that the trailing portion does not enter the cavity. With this apparatus fouling of the cleaner housing and unscheduled maintenance may be avoided.

Abstract: A corona generating device including an electrically biased corona emitting wire supported adjacent its ends by insulating end blocks. One of the blocks has a recess which houses a coil spring through which the wire passes coaxially. The wire is attached to a mass which bears against the loaded coil spring to maintain the wire in a taut condition.

Abstract: In a copying apparatus in which copy sheets are stripped from a reusable imaging surface after the images have been transferred thereto, a vacuum stripping system is provided in which a pivotable, highly apertured, stripping head is normally closely spaced from the imaging surface and connected to a vacuum source to pneumatically capture the lead edge area of the copy sheet. The coverage of the vacuum apertures in the stripping head by the captured sheet pneumatically lifts the stripping head away from the imaging surface into alignment with a copy sheet transport, and shifts the stripping point of the body of the copy upstream on the imaging surface.