Abstract:
A contact for use in contacting a moving photoreceptor surface, is formed from a structure (preferably a pultrusion) including a plurality of continuous strand fibers of high electrical resistance, and a thermally stable insulating component between the resistive fibers. The resistive fibers are configured to form a brush extending from the insulating component for contact with the photoreceptor surface. The resistance of the fibers is sufficiently high to reduce leakage of surface charges away from the photoreceptor and to provide a high resistance between adjacent fibers. The insulating component, which serves to interface the carbon filaments from each other and from a host polymer may comprise an organic compound, such as a polyimide composition, or may comprise an inorganic compound such as Al.sub.2 O.sub.3 or water glass, and is thermally stable below about 1000.degree. C. The host polymer, on the other hand volatilizes rapidly and cleanly upon direct exposure to laser energy.
Abstract:
An electronic device for conducting electric current has two contacting components at least one of which is a nonmetallic electronic contact in the form of a pultruded composite member made of a plurality of small generally circular cross section conductive fibers in a polymer matrix, the fibers being oriented in the matrix in a direction substantially parallel to the axial direction of the pultruded composite member and being continuous from one end of the member to the other to provide a plurality of electrical point contacts at each end of the member.
Abstract:
A three dimensional electrical component having a first side and a second side formed from an electrically insulating polymer matrix capable of heat conversion to an electrically conducting polymer matrix has at least one passageway from the first side to the second side having a tapered wall slope configuration from the first side to the second side with constantly changing cross section of the passageway from the first side through the passageway to the second side, an electrically conducting path between the first side and the second side formed by the in situ heat conversion of the walls of the passageway in the electrically insulating polymer matrix. In a preferred embodiment the electrically conducting path is formed by directing a laser beam to the walls of the passageway to heat the insulating polymer matrix to a temperature sufficient to convert it to an electrically conducting polymer matrix.
Abstract:
A cylindrical fiber brush useful in electrostatic charging and cleaning in an electrostatographic imaging process comprises an elongated cylindrical core having bound thereto a spirally wound conductive pile fabric strip forming a spiral seam between adjacent windings of the fabric strip, the fiber fill density of said fabric strip at the strip edge being at least double the fiber fill density in the center portion of the fabric strip. The increased fiber fill density at the strip edges provides additional fibers to fill the seams between the adjacent windings and improves the charging and cleaning performance at low rotational speeds.
Abstract:
Offset of toner powder upon a heated surface is prevented by applying an emulsion of a high viscosity release agent and a low viscosity dispersion liquid upon the heated surface by an applicator means in contact with the heated surface. The preferred emulsion is a mixture of high viscosity silicone oil and water. There is also described a method of manufacturing a fibrous applicator and the article formed thereby which includes the impregnation of the fibrous applicator with an emulsion of high viscosity liquid and a low viscosity dispersion liquid and the removal of low viscosity dispersion liquid after impregnation with the emulsion is complete. A preferred applicator is a fibrous wick having water removed therefrom after the fibrous wick is impregnated with an emulsion of a polydimethylsiloxane liquid and water.
Abstract:
Disclosed herein is an electrical component comprising a segment having a diameter in the range of about 1 micrometers to about 10 cm, the segment comprising a plurality of non-metallic, resistive fibers in a non-metallic binder. The segment is precisely trimmed to impart to the segment an electrical resistance within 1% of the desired resistance value. A manufacturing system and methods of manufacturing components having precise specifications also are disclosed.
Abstract:
An electrical component including a substrate comprising an electroconductive filler in a first polymeric binder, and a coating layer adhered to at least a portion of the substrate surface, the coating layer comprising a nanostructured electroconductive particulate dispersed in a polymeric binder, such as an epoxy resin. A method of making the component also is described.
Abstract:
A charging device comprises first and second electrodes forming a charging zone. A plurality of nanostructures adhere to at least one of the first and second electrodes. A charging voltage supply couples to the electrodes to support the formation of gaseous ions in the charging zone. An aperture electrode or grid proximate to the first and second electrodes is coupled to a grid control voltage supply which grid control voltage supply, in turn, controls a flow of gaseous ions from the charging zone to thereby charge a proximately-located receptor. In one embodiment, the charging voltage supply is arranged to provide a pulsed-voltage waveform. In one variation of this embodiment, the pulsed-voltage waveform comprises a pulsed-DC waveform. In another embodiment, the charging voltage supply is arranged to provide an alternating-current waveform. In one embodiment, the charging device itself is comprised in an image forming device.
Abstract:
A charging device comprises first and second electrodes forming a charging zone. A plurality of nanostructures adhere to at least one of the first and second electrodes. A charging voltage supply couples to the electrodes to support the formation of gaseous ions in the charging zone. An aperture electrode or grid proximate to the first and second electrodes is coupled to a grid control voltage supply which grid control voltage supply, in turn, controls a flow of gaseous ions from the charging zone to thereby charge a proximately-located receptor. In one embodiment, the charging voltage supply is arranged to provide a pulsed-voltage waveform. In one variation of this embodiment, the pulsed-voltage waveform comprises a pulsed-DC waveform. In another embodiment, the charging voltage supply is arranged to provide an alternating-current waveform. In one embodiment, the charging device itself is comprised in an image forming device.
Abstract:
An electrical component including an electrically conductive composition including a pyrrolized carbon-based material coated with a conductive polymer is disclosed.