摘要:
The method of and means for the production of markers for the cutting of fabric or material in the garment or allied industries comprising forming a latent electroscopic image pattern on the surface of a dielectric master and toning the image with a primary toner and transferring the primary image toner to a conductive receiving member and fixing and then toning the fixed image with a secondary toner and transferring optionally to the fabric or material or to multiple copy members for marking fabric or material.
摘要:
A method of and means for developing electrostatic latent images using liquid dispersed toners in which method toner from said liquid suspension is first deposited on the surface of a transport member by electrostatic means and the transport member carrying the deposit of toner material is subsequently brought into contact with the latent image-bearing surface of a recording member to develop the latent image without appreciably wetting the recording member surface, excess developer being carried back to the liquid suspension source by the transport member.
摘要:
A method of producing positive multicolor proofs electrostetically including the steps of charging a photoconductor, exposing the charged photoconductor to a negative film, forming a latent electrostatic image on the photoconductor, transfer toning said latent image by virtual contact with a donor member carrying an electrostaticially deposited toner layer. The image remaining on the donor member is transferred to the printing stock paper forming the positive proof. Multiple images are formed from successive film negatives and transferred successively on the printing stock.The deposited form layer is split, between the charged areas on the photoconductor and the image areas on the donor member.
摘要:
Particles containing a releasable fill material and method of preparing same. A particle comprises a continuous polyurea surface layer, and an interior portion comprising a polyurea matrix, said matrix having a fill material contained therein, said matrix forming a continuum extending from the surface layer into the interior of the particle. The particles can be prepared by a method comprising:(1) admixing fill material, an isocyanate, and a matrix-forming co-reactant to form a mixture,(2) emulsifying said mixture in an aqueous medium containing a non-reactive emulsifying agent to provide a dispersion of spheres, and(3) hydrolyzing a first portion of the isocyanate near the surface of said spheres to initiate formation of polyurea at the surface of said spheres as a thin, substantially continuous layer and in the interiors of the spheres as a continuum for some distance beneath the surface of the spheres, and reacting a second portion of the isocyanate within said spheres with said matrix-forming co-reactant to form additional matrix material in the interior of the spheres.
摘要:
An electrophotographic method of producing positive color proof copies from negative films wherein a charged photoconductor is exposed to the negative film and toned with a conductive toner forming image deposits in the unexposed area. The conductive deposits are transferred to a dielectric paper and affixed thereto. The dielectric paper is charged, the charge being accepted only in areas free of the conductive deposits, i.e. the final image areas. The charged areas are toned with color toners and the color toner deposit transferred to printing stock to provide the positive proof.
摘要:
An applicator and method for applying liquid dispersed toner to the surface of an electrographic recording member, held on a platen which moves over a planar developing electrode, in which there is relative movement between the developing electrode and the recording member alternately in opposite direction, and in which there are at least two coplanar developing electrodes having toner fed therebetween, such as by a roller, and in which there are control means such as varying the direction of rotation of the roller to cause the developer to flow over either one or other of the developer electrodes according to the direction of relative movement of the platen.
摘要:
Electroscopic marking particles comprising microcapsules consisting of a pressure fixable core and pressure rupturable shell which is characterized by the core comprising pressure fixable material and coloring matter and the shell is formed by interfacial polycondensation.
摘要:
An image reversal process for the production of electrophotographic color proofs from negative separation films where the photoconductive recording member is reusable and the proofs are produced on printing stock paper and which very closely match the appearance of the printed sheet.The process of the invention comprises, exposing a photoconductor that is charged to a first polarity through a color separation negative film which may be in contact therewith, developing the unexposed areas on the photoconductor with opposite polarity background toner to form background deposits thereon in areas corresponding to the opaque non-image or background areas on the negative, subjecting the photoconductor and the background deposits thereon to corona discharge of said first polarity to charge the photoconductor in the areas free of said background deposits, that is, in areas corresponding to the transparent image areas on the negative, removing charges of said first polarity from the background deposits, developing the image area on the photoconductor with opposite polarity color toner, and transferring the thus formed color toner deposits to a receptor such as printing stock paper. The process can be repeated for each additional color separation negative film to transfer the additional specific color developed image in proper registry where a proper toner for the specific color image will be used.
摘要:
A toning method and member for electrostatography wherein a recording member containing information on its image bearing surface in the form of electrostatic latent images of one polarity is toned by attracting to such latent images toner material of opposite polarity including providing a carrier or toning member according to the invention containing on at least one surface thereof a dry pre-toner coating; activating such pre-toner coating with an insulative solvent to thereby solvate and confer opposite polarity to such pre-toner coating contained thereon while rendering such pre-toner coating releasable from the carrier member; establishing virtual contact between the activated and releasable pre-toner coating on the carrier member and the image bearing surface of the recording member; transferring the pre-toner coating in image configuration onto the recording member by attraction to the latent images to form toner deposits thereon; and separating the carrier member from the recording member.
摘要:
This invention relates to a toner for electrostatic image and for liquid development thereof. According to this invention, the inventive toner eliminates the need for a control agent in the form of a coating on the toner particles by the chemical combination of a reactive material with a reactive coloring material.