Matches 201 - 238 out of 238 < 1 2 3 4 5


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4282304 Method of forming magnetic toner particles having a concentration of magnetic particles greater than 45 percent by weight by dispersion polymerization techniques  
Toner particles are prepared by a dispersion polymerization technique wherein monomer present in the discontinuous phase is removed after sizing of the monomer droplets to thereby increase the...
4282296 High speed magnetographic imaging process  
This invention generally is directed to methods for developing images, including latent magnetic and electrostatic images, which involves forming latent images on a suitable substrate and...
4282302 Ferrite powder type magnetic toner used in electrophotography and process for producing the same  
A ferrite powder type magnetic toner used in an electrophotography. It comprises a resinous component and a ferrite having a spinel structure comprising components of iron oxide at a ratio of 99.9...
4277552 Magnetic developing process and toner containing high coercive force magnetic powder  
Disclosed is an electrostatic image developing process using a magnet roll and a magnetic toner of specified flux density.
4273847 Inks for pulsed electrical printing and methods of producing same  
A printing ink comprises particles of small size, each having a body portion consisting of a fusible resin and a colorant and electrically conductive material situated substantially entirely on...
4272600 Magnetic toners containing cubical magnetite  
This invention is generally directed to magnetic toners comprised of a styrene butadiene copolymer resin, and a cubically shaped magnetite material, which toners have a fusing latitude range of at...
4271248 Magnetic latent image toner material and process for its use in flash fusing developing  
A method for developing magnetic latent images comprising forming a latent image on a suitable substrate and contacting said image with a magnetic toner which comprises a magnetic material and a...
4265992 Coated magnetic developer particles for electrophotography containing vinyl and olefin resins  
In a one-component type developer for electrophotography consisting essentially of a dry blend of fixing magneto-sensitive particles and flowability- and electric resistance-controlling fine...
4262076 Method for manufacturing magnetically attractive toner particles and particle  
A method for manufacturing magnetically attractive toner particles utilized for developing electrostatic latent images includes a first step of thermally kneading a mixture of a first resin...
4259427 Image-forming developer  
An image-forming method using a developer comprising as the main component ferromagnetic and insulating toner particles. Said method comprises the steps of holding said developer on a delivery...
4256818 Magnetic or electrostatographic imaging and high speed fusing method uses polyamide resin in toner  
This invention is directed to new electrophotographic, and magnetic toners, which are useful for example in high speed fusing systems, these toners being comprised of a polyamide resin, a pigment...
4254203 Dry process developing method employing magnetic toner  
A dry process developing method which comprises: (a) preparing main particles comprising a highly insulating resin and magnetizable fine particles, with part of the magnetizable fine particles...
4254204 Magnetic brush electrographic developing method  
An electrographic developing method for developing a latent electrostatic image on a support to a toner image by brushing the image bearing surface of the support with a magnetic brush comprising...
4242434 Toner composition for multiple copy electrostatic photography  
In controlling the operation of an electrostatic apparatus to produce a large number of copies from an electrostatic image in a multiple copy process there is utilized a toner substance comprising...
4239845 Electrophotographic copying method using two toners on magnetic brush  
An electrophotographic copying method is carried out by the use of a developing material consisting of a magnetic toner of a volume resistivity within the range of 1010 to 1014 Ωcm and a...
4230787 Magnetic toner for developing latent electrostatic images and a process for the preparation thereof  
A one-component developer for developing a latent electrostatic image which comprises magnetic particles, thermoplastic resins and electric charge controlling dyestuffs as main components and in...
4224396 Magnetic toner materials containing quaternary ammonium polymers as charge control agents  
Magnetic toners containing quaternary ammonium polymers, methods of their formation and utilization of such toners in various electrophotographic imaging systems are disclosed. Toners containing...
4220698 Direct imaging pressure fixable magnetic toners  
Novel pressure fixable direct imaging magnetic toners having a core of magnetic material held together with an adhesive resin, a barrier substantially covering the core, an overcoat of...
4218530 Single component magnetic toner  
A toner and process of its manufacture for use in electrostatic development processes involving a magnetic toner without carrier are disclosed. The toner of the invention is semiconductive and...
4199614 Transparent colored magnetic materials and electrostatographic process  
Transparent colored materials having low bulk densities and high magnetic permeabilities are obtained by encasing silicaceous particles in a sheath of magnetic or magnetically-attractable metal,...
4192902 In situ coating then spray drying of magnetic toner  
A method of toner formation wherein a dispersion of magnetic pigment, resin, solvent and surfactant is spray dried to form the toner particles. Two preferred processes are disclosed: (1) A...
4189390 One-component magnetic developer powder for developing electrostatic latent image and method of making same  
A one-component magnetic developer powder for developing an electrostatic latent image formed according to an electrophotographic process comprising non-agglomerative essentially spherical members...
4176078 Field dependent toner having chrome complex coated magnetic particles  
A method of coating pigment particles such as magnetite with a fatty acid chrome complex is disclosed. The magnetite pigments coated by this process are found to be particularly suitable for use...
4171274 Alteration of tesselated magnetic particles by fracture  
A process of modification of magnetic toner for use in electrostatic development processes involving a magnetic toner without carrier is disclosed. The modified toner of the invention is...
4146494 One-component developer powder and process for its preparation  
Electrically conductive developer powder for developing electrostatic images by inductive attraction is provided, with avoidance of practical disadvantages of known "one-component" developer...
4142981 Toner combination for carrierless development  
A toner and electrostatic development process involving electrostatic development without carrier is disclosed. The toner of the invention is effectively transferred from photoreceptors to plain...
4108786 Magnetic dry developer for electrostatic photography and process for preparation thereof  
A magnetic toner for electrostatic photography consisting essentially of spherical particles of a composition comprising a fine powder of a magnetic material having an average particle size not...
4105572 Ferromagnetic toner containing water-soluble or water-solubilizable resin(s)  
Ferromagnetic toner which is useful in magnetic printing processes and devices for printing a variety of substrates, including textiles, such as fabric and yarn, film, paper, metal and wood, which...
4082681 Magnetic developer for electrostatic photography and process for preparation thereof  
A developer for electrostatic photography comprising as indispensable components a fine powder of a magnetic material and a binder resin, said developer consisting essentially of a dry blend of...
4031021 Magnetic toner compositions  
A magnetic toner composition for use in decorating a magnetically imaged substrate in magnetic printing machines comprising a particulate blend of between about 50% and about 99% by weight of...
3965022 Pressure-fixable developing powder  
A dry, pressure-fixable, developing powder comprising a thermoplastic component having a low creep compliance and a non-volatile component having a high creep compliance, wherein the low creep...
3935008 Electrophotographic process having developed hydrophilic image areas  
A process for the production of a copy from an original which includes creating a charge image on a hydrophobic photoconductive material, pre-developing the charge image by the application thereto...
3627682 ENCAPSULATED PARTICULATE BINARY MAGNETIC TONERS FOR DEVELOPING IMAGES  
Described and claimed are flowable, particulate, binary toners for developing magnetic images comprising a particulate hard magnetic material, e.g., Fe3 O4 or CrO2, and a particulate soft magnetic...
3796664 MATERIALS IN ELECTROPHOTOGRAPHIC PROCESS  
3377286 Developer powder containing black magnetic iron oxide  
3345294 Developer mix for electrostatic printing  
3239465 Xerographic developer  
2846333 Method of developing electrostatic images  

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