Abstract: A process for preparing a selenium alloy highly resistant to the development of persistant bulk space charge during prolonged, electrophotographic cycling comprising heating a mixture comprising selenium, arsenic and chlorine to a temperature between about 290.degree. C. and about 330.degree. C. to form a molten mixture, agitating the molten mixture to blend the components therein, discontinuing or substantially discontinuing all agitation of the mixture to achieve a quiescent state for the mixture, raising the temperature of the mixture to at least about 420.degree. C. for at least about 30 minutes and cooling the mixture until it becomes a solid.

Abstract: An electrostatic latent image residing on an electrically insulating surface used to induce a similar image on a sectionally conductive member by bringing one surface of the sectionally conductive member into proximity with the latent image while the opposite surface of the sectionally conductive member is brought to ground potential. The sectionally conductive member is then removed from proximity with the latent image. To prevent electrical breakdown during removal, a grounded electrode is placed adjacent the surface of the sectionally conductive member opposite the latent image but separated from the sectionally conductive member by a thin electrically insulating layer. A latent image is thus formed on the sectionally conductive member which can be developed by conventional means such as with electroscopic materials well known in the xerographic art.

Abstract: This invention is directed to a process for charging magnetic toner particles contained in a xerographic developer composition, the developer composition being comprised of conductive magnetic carrier particles and substantially uncharged magnetic toner particles, said process comprising transporting by an electrode transporting member the magnetic toner particles into close proximity of the electrical potential existing in the region of an imaging bearing member of an electrophotographic, or electrographic imaging system containing a magnetic brush development device whereby charge of a polarity opposite to that of the electrical potential is induced into the toner particles, causing the toner particles to possess a resistivity of from about greater than 10.sup.15 ohms-cm to about less than about 10.sup.18 ohms-cm, the effective distance between said image bearing member and said electrode transporting member being from about 5 micrometers to about 100 micrometers.

Abstract: A composite quasi-crystalline material made of a polymeric support matrix having disposed therein polar quasi-crystals of photochromic spiropyran complexes, believed to be of the formula A.sub.n B, in which A represents the "colorless" photochromic spiropyran molecule and B represents the colored merocyanine form which is the photolysis product of A, and n is 2 or 3. The polar quasi-crystals are present in the composite material in a substantially polar aligned form. Methods for making the composite material are also disclosed.

Abstract: This invention is directed to magnetic imaging method comprising creating a latent magnetic image on a reflex imaging member, transferring the latent image by thermoremanent duplication to a durable magnetic imaging member, developing the transferred image on the durable imaging member, and transferring the developed image to a receiving member. In one embodiment the present invention involves an improved magnetic imaging method which comprises (a) erasing and subsequently magnetizing a reflex magnetic imaging member with a D.C.

Abstract: An electrophotographic photosensitive member comprising a conductive support, a charge generating layer overlying the conductive support and a charge transport layer overlying the generating layer, the charge transporting layer comprising an electrically inactive organic resin binder having dispersed therein inorganic n-type semiconductive particles having a mean particle size below about 0.1 .mu.m.

Abstract: Process for preparation of monodispersed crystalline particles from amorphous crystallizable polymers. In this process, an amorphous polymer of an inorganic glass, such as selenium, or of organic polymer, such as a polyester, is initially contacted with a crystal inducing fluid under certain specified conditions. Concurrent with such contact the crystallizable polymer is subjected to physical and/or ultrasonic forces. This combination of steps results in the substantially complete conversion of the amorphous polymer to monodispersed crystalline particles. In the case of crystallization of amorphous selenium, this process is directive for preparation of the corresponding triclinic crystalline form of this material.

Abstract: A photosensitive member having at least two electrically operative layers is disclosed. The first layer comprises an electrically conductive layer. The second layer comprises a charge transport layer. The third layer is a photoconductive layer contiguous with the transport layer. The photoconductive layer is capable of photogenerating and injecting photogenerated holes into the contiguous or adjacent electrically active part. The electrically active material comprises a polycarbonate resin material having dispersed therein from about 25 to 75 percent by weight of one or more compounds having the general formula: ##STR1## wherein X is selected from the group consisting of an alkyl group having from 1 to about 4 carbon atoms (e.g. methyl, ethyl, propyl, butyl, etc.) and chlorine in the ortho, meta or para position. This structure may be imaged in the conventional xerographic mode which usually includes charging, exposure to light and development.

Abstract: A magnetic master is provided by premagnetizing a magnetizable recording member, forming characters on the backing layer of the recording member with a typewriter or suitable marking means, and exposing the recording member from the backing layer side to flash energy to demagnetize the background areas and form a latent magnetic image. The latent magnetic image may be contacted with a magnetic toner and the developed image transferred to a receiving surface where it is permanently fixed. The magnetic master may be developed hundreds or thousands of times to produce the desired number of prints.

Abstract: An imaging member comprising a hole generation layer and a contiguous hole transport layer, said generation layer comprising a photoconductive material exhibiting the capability of photogeneration of holes and injection of said holes, said hole transport layer comprising a di or triarylmethane compound of the general formula: ##STR1## wherein R.sub.1 and R.sub.2 are independently selected from the group consisting of a C.sub.1 -C.sub.8 alkyl, aryl, alkaryl and aralkyl, where said aryl is a phenyl group or a condensed ring group, where the alkyl group of said alkaryl and aralkyl is a C.sub.1 -C.sub.4 group; R.sub.3 is independently selected from the group consisting of hydrogen and CH.sub.3 ; and R.sub.4 is the same as R.sub.1 and R.sub.2 or a disubstituted aminophenyl group wherein the substituents are independently selected from the group consisting of a C.sub.1 -C.sub.

Abstract: An electrostatic latent image residing on an electrically insulating surface used to induce a similar image on a sectionally conductive member by bringing one surface of the sectionally conductive member into proximity with the latent image while the opposite surface of the sectionally conductive member is brought to ground potential. The sectionally conductive member is then removed from proximity with the latent image. To prevent electrical breakdown during removal, a grounded electrode is placed adjacent the surface of the sectionally conductive member opposite the latent image but separated from the sectionally conductive member by a thin electrically insulating layer. A latent image is thus formed on the sectionally conductive member which can be developed by conventional means such as with electroscopic materials well known in the xerographic art.

Abstract: A photosensitive member having at least two electrically operative layers is disclosed. The first layer comprises a photoconductive layer which is capable of photogenerating holes and injecting photogenerated holes into a contiguous charge transport layer. The charge transport layer comprises an electrically inactive organic resinous material containing from about 10 to about 75 percent by weight of: ##STR1## The above compound has the chemical name bis(4-diethylamino-2-methylphenyl)-4-diphenylaminophenyl methane. The charge transport layer while substantially non-absorbing in the spectral region of intended use is "active" in that it allows injection of photogenerated holes from the photoconductive layer, and allows these holes to be transported through the charge transport layer. This structure may be imaged in the conventional xerographic mode which usually includes charging, exposure to light and development.

Abstract: An imaging member comprising a hole generation layer and a contiguous hole transport layer, said hole transport layer comprising a transparent electrically inactive polycarbonate resinous material having a residual amount of a halogen containing organic solvent therein and dispersed therein from about 25 to about 75 percent by weight based on said transport layer composition of a diamine, said charge transport layer being substantially nonabsorbing in the spectral region at which the hole generation layer generates and injects photogenerated holes, but being capable of supporting the injection of photogenerated holes from said photoconductive material and transporting said hole through said charge transport layer, said charge transport layer also containing a stabilizing proportion of a di or triaryl methane compound of the general formula: ##STR1## wherein R.sub.1 and R.sub.2 are independently selected from the group consisting of a C.sub.1 -C.sub.

Abstract: An electrophotographic photosensitive body comprising a conductive support, a photoconductive layer thereon and a protective layer. The protective layer comprises a binder resin, an aromatic diamine and an organic halogen capable of producing a free halogen atom, such as iodoform, carbon tetraiodide, pentabromoethane, p-nitrotribromoacetophenone, trichloroacetophenone, tribromomethylphenylsulfone, bis(tribromomethyl)-sulfoxide, and p-bromobenzenedichlorosulfonamide.

Abstract: A photosensitive member having at least two electrically operative layers is disclosed. The first layer comprises a photoconductive layer which is capable of photogenerating holes and injecting photogenerated holes into a contiguous charge transport layer. The charge transport layer comprises a polycarbonate resin containing from about 25 to about 75 percent by weight of one or more of a compound having the general formula: ##STR1## wherein X is selected from the group consisting of an alkyl group having from 1 to about 4 carbon atoms (e.g. methyl, ethyl, propyl, butyl, etc.) and chlorine in the ortho, meta or para position. This structure may be imaged in the conventional xerographic mode which usually includes charging, exposure to light and development.

Abstract: A fuser member and method of fusing or fixing thermoplastic resin powder images to a substrate in a fuser assembly of the type wherein a polymeric release agent having functional groups is applied to the surface of the fuser member is disclosed. The fuser member comprises a base member having an elastomer surface with metal-containing filler therein, said elastomer being cured with a nucleophilic addition curing agent.

Abstract: There is described an electrophotographic imaging system which includes a laminated cleaning and/or metering blade for removing residual or excess marking or other material from a surface. The blade comprises a relatively hard layer of a smooth, tough material which has low frictional properties and a relatively soft layer of a resilient material which supplies uniform force at the blade-to-surface interface. In operation, an edge of the relatively hard layer of the blade is supported in pressure contact against the surface and relative motion between the blade and surface is produced whereby the blade removes residual or excess marking material from the surface.

Abstract: An imaging member comprising a charge generation layer comprising a layer of photoconductive material and a contiguous charge transport layer of a charge transport material dissolved in a polymer of the following structure: ##STR1## wherein R', R", R'" and R"" are independently selected from the group consisting of alkyl and alkylene groups having from 1 to 12 carbon atoms, there being no more than 1 alkylene group present, x is from 4 to 5, y is from 0 to 1, n is a whole number and said polymer has a molecular weight ranging from about 1500 to about 120,000, said transport layer being substantially nonabsorbing in the spectral region at which the photoconductive layer generates and injects photogenerated holes, but is capable of supporting the injection of photogenerated holes from said photoconductive layer and transporting said holes through said charge transport layer.

Abstract: A fuser member, fuser assembly and method of fusing or fixing thermoplastic resin powder images to a substrate in a fuser assembly of the type wherein a polymeric release agent having functional groups is applied to the surface of the fuser member is disclosed. The fuser member comprises a base member having at least two layers of elastomer thereon, at least the outer layer elastomer surface having a metal-containing filler therein. Exemplary of such a fuser member is an aluminum base member coated with a first layer of poly(vinylidene fluoride-hexafluoropropylene) copolymer optionally having a metal-containing filler, such as lead oxide, dispersed therein and at least a second layer of poly(vinylidene fluoride-hexafluoropropylene) copolymer having metal-containing filler, such as lead oxide, dispersed therein coated upon said first layer.

Abstract: A method and apparatus for recovering the residual image from an electrostatic recording surface in an electrostatic copying system which is accomplished by presenting a wiping element in pressure contact with the residual image on the recording surface whereby the residual image is substantially removed therefrom, moving a conductive member in close proximity to the toner particles being removed from the recording surface, applying a DC voltage opposite in polarity to that of the toner particles and of sufficient magnitude to the conductive member whereby the toner particles are attracted onto the surface of the conductive member, and continuously removing the toner particles from the conductive member into a collection zone for reuse in the copying system.