Abstract: A plurality of electrodes are formed, each of which is constituted by a bundle of 50 to 1,000 pieces of stainless steel fibers each having a diameter of 5 to 50.mu.. Each bundle is twisted such that the number n of twist falls within the range of 0.1.ltoreq.n.ltoreq.3. The electrodes are fixed at their base ends to a supportive frame at a right angle to the latter, such that the pitch of the electrodes is within 50 mm and the effective length of each electrode is not smaller than 3 mm. The bundles are released from twisting to obtain a larger width of each electrode at the free end of the latter than at the fixed base end of the same. In one form, the pieces of stainless steel fibers constitute warps. A plurality of groups of wefts are weamed into the warps at a right angle to the latter, such that the distance between the adjacent groups of wefts is not smaller than 3 mm. The wefts and warps are fixed at points of contacts therebetween.

Abstract: A magnetic tape cassette is provided with shielding means for the guide posts thereof, including a clip member of electrically-conducting material, for preventing build-up of static electrical charges and resultant clinging of the tape to the guide posts, when it is desired to pull the tape from the guide posts by vacuum pressure-differential apparatus, as for threading into a tape transport.

Abstract: A corona device suitable for use in electrophotographic apparatus to provide a uniform charge on photoconductive material comprises as the ion-generating means a multiplicity of electrode pins, all of the same diameter, which are provided at the same mutual spacing from one another in a body of insulating material from which all the pins project to the same extent, with the pins limited to a diameter between 10 and 100 microns, a mutual spacing of between 0.3 and 2.5 mm, a projecting length of between 0.7 and 3 mm, a length to diameter ratio of between 10 and 300 and a spacing distance to diameter ratio of between 4 and 250. The electrode pins are formed from lengths of a suitable conductive wire which are laid at the required mutual spacing and soldered to and between conductive strips to form an electrically conductive unit that is embedded in a cast body of the insulating material with free ends of the wire lengths projecting to the required extent.

Abstract: A process of imposing an electrical charge on an electrically insulating surface of a moving web wherein a brush electrode contacts the surface. The brush is made up of extremely soft and flexible fiber filaments comprising carbon mounted on a metallic brace which also serves as an electrical contact to supply the brush with d.c. potential whereby the electrically insulating surface is charged to nearly the potential applied to the brush.In order to improve charge uniformity the brush is oscillated in a direction transverse to the direction of web movement.

Abstract: A heat fixing device for use in an electrophotographic copying machine in which an electroconductive layer is provided in the surface of one of the fixing and pressure rolls for preventing charge built up upon the surface of the roll. The layer is preferably provided as an aluminum plated layer covered by a non-adhesive releasing layer made of a material such as tetrafluoroethylene or HTV or RTV silicone rubber. Provision of the electroconductive layer prevents an electric field from forming extending through a sheet carrying an image to be fixed thereby substantially entirely, eliminating any offset produced on the roll.

Abstract: Charged neutralizer apparatus including a charge neutralizing brush which is formed thin conductive wires brought into proximity with a charged body to cause a discharge thereof is disclosed herein. A spacer member is provided to prevent direct contact between the thin conductive wires and the charged body and defines a narrow clearance therebetween. The brush is disposed in a movable manner and adapted to move under its own weight or by biasing means, in following relationship with the changed body to thus enable an elimination of charge at any position of the charged body.

Abstract: This specification discloses a copying apparatus having an original feeding mechanism for feeding originals by moving the originals on the surface of an original supporting member, characterized in that discharging means acts on the original supporting member from that side thereof opposite to the original supporting side of the original supporting member to discharge the original supporting surface.

Abstract: An antistatic record cleaner has a support securable to a turntable adjacent the platter thereof and having an upward metallic pin having an upper end projecting from the support. A sweep arm is pivoted on the support and has a metallic rod whose inner end is secured in a pivot-forming block which is formed with a recess receiving the upper end of the pivot with metal-to-metal contact between the rod and the pin and has on its outer end a head piece carying a record-sweeping brush. A plurality of fine metallic filaments extend downwardly from and are in direct electrical contact with the outer end of the rod. A terminal is provided on the support in direct electrical contact with the pin and through the rod with the filaments. This terminal can be grounded via a lead so that static electric charges on the record being swept can be eliminated.

Abstract: An imaging or transfer roller comprising mechanism to couple the roller to a ground potential close to the imaging or transfer zone, is provided. The roller includes insulator members concentric with the roller shaft and conductive sleeves on the ends of the roller.