Abstract: A novel yellow electrostatographic colorant is disclosed. This colorant may be employed as an electrostatographic toner or developer material. Electrophotographic processes are disclosed employing this colorant. When employed as an electrophotographic developing material, this colorant is found to possess superior triboelectric properties among others which result in superior electrophotographic machine life than known yellow colorants.

Abstract: A sheet of support material in which a non-fibrous image receiving portion has a fibrous portion secured thereto. The fibrous portion cooperates with a sheet feeding apparatus to facilitate the seriatim feeding of successive sheets of support material from a stack thereof.

Abstract: An apparatus in which a latent image of an original document is recorded on a photosensitive member. A light image of the original document is projected through a normally non-deformed transparent member onto the photosensitive member. An operator actuatable control deforms the transparent member producing a plurality of spaced grooves therein. The light image transmitted through the grooved portion of the transparent member is phase shifted with respect to the light image transmitted through the non-grooved portion thereof. In this way, the operator may deform the transparent member producing a modulated light image, or permit the transparent member to remain in the non-deformed condition so as not to modulate the light image.

Abstract: A method for color accenting selected portions of a photocopy wherein a photoconductive surface is exposed to a light image of the document being reproduced, the non-selected portions of the resulting latent image are erased prior to developing the image with a given colored toner, and the developed image is transferred to a copy sheet before a subsequent reproduction of the document is performed. During the subsequent reproduction, the non-selected portions of the latent image remain on the photoconductive surface and the selected portions are erased prior to development with a different color than the given colored toner of the non-selected portions of the document and the transfer of the non-selected portions to the same copy sheet that previously received the selected portions.

Abstract: A method of reproducing a color highlighted original document in which at least two successive latent images are recorded on an overcoated photoconductive surface. One of the latent images corresponds to the black regions of the original document, while the other latent image corresponds to one of the color regions of the original document.

Abstract: An apparatus in which a metered quantity of release material is applied to a fuser roll. The release material is heated to maintain it substantially in a fluid state.

Abstract: An apparatus which regulates the developability characteristics of a development system employing a developer mixture comprising at least carrier granules and toner particles. A transparent electrode attracts toner particles from the carrier granules. Light rays are transmitted through the electrode with the particles thereon. Sensors having peak transmittances corresponding to the peak transmittance and absorbence of the toner particles, detect the intensity of the light rays transmitted through the electrode and generate electrical output signals indicative thereof. These signals are processed and a control signal is developed which regulates the dispensing of additional toner particles into the developer mixture. In this manner, the concentration of toner particles within the developer mix is adjusted.

Abstract: An electrophotographic printing machine in which a transparency or an opaque original document is reproduced. In reproducing a transparency, a mirror is pivoted from a position remote from the light image path into the path of the transparency light image. When an opaque original document is being reproduced, the mirror is pivoted to the position remote from the light image path.

Abstract: A toner image carried upon a substrate is fixed by placing the toner image in close juxtaposition to an absorbent web carrying a volatile toner solvent. The toner particles are softened and caused to adhere to the substrate by the action of the vapors emanating from said web. In order to protect the environs from the solvent vapors, the web is enclosed within a substantially sealed housing when laden with said solvent.

Abstract: An apparatus in which a quantity of particles is stored for being dispensed gradually therefrom. The particles remain stored therein when the apparatus is stationary, and are discharged therefrom when the apparatus undergoes oscillatory movement.

Abstract: An apparatus which renders a latent image visible by depositing developer material thereon. The apparatus includes a tubular member having a styrene-butadiene layer coated on a nonmagnetic roll. Magnets are disposed interiorly of the tubular member to attract the developer material thereto. The developer material is transported into contact with the latent image to produce a powder image thereon.

Abstract: A control system in which the thermal energy produced by a first heat source and a second heat source cooperating therewith is regulated by adjusting the phase of the voltage applied thereto.

Abstract: An electrophotographic printing machine in which color transparencies are reproduced. A projected image of the color transparency is scanned forming a light image thereof. The light image is modulated and filtered creating a single color half-tone light image. A charged photoconductive member is irradiated by the single color half-tone light image recording a single color electrostatic latent image thereon.

Abstract: An apparatus in which heat settable particles are substantially permanently affixed to a sheet. The apparatus includes a fuser member having a supply of release material applied thereto from a chamber in a housing. The release material is a liquid when the fuser member is at its operating temperature. However, when the fuser member is de-energized, the release material solidifies. Baffles are provided in the chamber of the housing to facilitate solidification of the release material adjacent to the fuser member.

Abstract: An apparatus in which a developer material is moved adjacent an electrostatic latent image so that the latent image attracts the developer material thereto in image configuration. The developer material is advanced from a supply thereof to the latent image, with the unused developer material being returned thereto. As the developer material returns to the supply thereof, the velocity in the central region is greater than in the marginal regions.The foregoing is achieved by passing the unused developer mix through a plate having a plurality of progressively shorter chutes in an inwardly direction disposed symmetrically about the central region thereof. In this manner, the unused developer mix has a greater velocity in the central region than in the marginal regions thereof preventing the developer mix from clogging the chutes of the plate.

Abstract: An electrophotographic printing machine in which particles are cleaned from a half-tone image screen. The screen is movable from an operative position closely adjacent to the printing machine photoconductive member to an inoperative location remote therefrom. As the screen moves in one direction, a cleaning device moves in a direction opposed thereto so as to remove particles therefrom.

Abstract: A temperature compensated doctor blade system is disclosed for controlling the amount of liquid on a substrate. Variation in temperature is found to cause wide variation in liquid viscosity which affects doctor blade pressure requirements. An expandable chamber containing a temperature responsive fluid is used to control the pressure applied to a flexible doctor blade.

Abstract: An apparatus in which successive layers of charged particles are transferred, in superimposed registration with one another, to a sheet of support material. The sheet of support material is reciprocated so that successive forward movements thereof are in synchronism with the movement of the charged particles. On the return movement, the sheet of support material is located in a position to initiate the transfer of the next successive layer of particles in superimposed registration with the previously transferred layer of charge particles during the forward movement thereof.

Abstract: A sheet feeding apparatus in which a stack of sheet material is moved from a non-feeding to a feeding position for advancing successive uppermost sheets therefrom along a substantially common path.

Abstract: An electrophotographic printing machine in which a transparency or opaque original document is reproduced. A movable screen is located in a first position spaced from the path of the transparency light image in order to reproduce the original document. When the transparency is being reproduced, the screen is moved to a second position in the path of the transparency light image for modulating the light image thereof.