Matches 151 - 200 out of 238 < 1 2 3 4 5 >


Match Document Document Title
4640881 Method for the dispersement of magnetic filler in one-part toner powder and the composition therefor  
Mixing into a combination of thermoplastic organic resin and magnetic powder used to make a toner, a silanol methylsiloxane resin readily gives a dry toner powder useful in making photocopies.
4634649 Developer compositions  
Disclosed is a two-component developer composition enabling smudge resistant images which is comprised of improved two-component contamination free developer composition comprised of (1)...
4622281 Magnetic color toner containing gamma ferric oxide particles  
A magnetic color toner stable to heat and light which does not fade or discolor for a long period of time is prepared by incorporating γ-Fe2 O3 particles as a magnetic component in a toner.
4612269 Method of fabricating a lithographic master  
A process of preparing a lithographic printing master is presented utilizing electrophotographic principles. As a result of the high density, low background images which can be developed using the...
4612273 Pressure fixing a single component toner with polyamide-rosin  
A pressure fixable single component electrophotographic toner or developer composition of a particle size of from 10-40 microns comprising a specialized low melt viscosity polyamide resin...
4609603 Process for achieving consistent high quality images with magnetic developer composition  
A process for generating consistent high quality images for extended periods, consisting essentially of (1) providing a xerographic imaging, or printing apparatus; (2) adding thereto a stable two...
4601967 Toner particles having a relatively high specific volume resistivity coating layer  
A toner for developing latent electrostatic images is disclosed, which consists of toner particles, with each toner particle consisting of (i) a core particle comprising an electroconductive...
4600676 Toner composition containing titanate coupling agent for electrophotography and method for producing said toner  
A toner composition in particle form for electrophotography comprising an inorganic material powder, e.g., a magnetic material, which is dispersed together with other additives in a binder resin...
4569896 Resistive single component developer composition  
An improved single component magnetic toner composition with a resistivity of from about 1013 to about 1016 ohm/cm, at 1,000 volts, and comprised of: (a) first resin particles of a styrene...
4554232 Magnetic toner  
A magnetic toner containing a resin which is obtained by the reaction of a compound containing epoxy radical with an amino-silane compound.
4540646 Method of developing an electrostatic latent image  
Method and apparatus for developing electrostatic latent images comprising a developer which in turn is composed of a toner made up of resin and particles of magnetic materials having negative...
4536462 Encapsulated particulate magnetic development powders containing a sublimable dyestuff  
A novel magnetic, electrophotographic, development or toner powder is provided comprising essentially spherical particles with a diameter between 5 and 50μ. The particles contain small...
4533614 Heat-fixable dry system toner  
A toner, fixable sufficiently at lower temperatures to afford energy saving, particularly suitable for high speed fixing and also good in off-set resistance with a broad applicable temperature...
4530893 One-component type red color magnetic developer  
Disclosed is a one-component type red color magnetic developer having a self-electroscopic property, which comprises particles prepared from a kneaded composition comprising 100 parts by weight of...
4529680 Magnetic toner for pressure fixation  
A magnetic toner for pressure fixation containing at least a resin and a magnetic powder as the main components, where the resin is a polymer essentially, containing methyl-1-pentene as the main...
4526851 Magnetic developer compositions  
Magnetic developer compositions contain ferrous carbon. The ferrous carbon is a fibrous, particulate carbonaceous material comprising carbon fibers and a ferrous group metal component, where the...
4515880 Reflex imaging process with magnetic images  
Method of developing latent magnetic images obtained by reflex thermomagnetic recording. A reflex imaging member is magnetized and a latent magnetic image formed thereon by thermoremanent...
4514484 Powder for developing latent images and a method of producing the powder  
A powder suitable for developing latent magnetic images comprising magnetic particles coated with a mixture of a thermoplastic resin and a silane. A method for producing the said powder comprising...
4504562 One-component type magnetic developer comprises particles of cubic magnetite  
Disclosed is a one-component type magnetic developer consisting essentially of a particulate shaped article of a composition comprising a binder resin medium and a powdery magnetic material...
4495268 Electrophotographic process using transfer-type one-component magnetic developer  
Disclosed is a transfer-type one-component dry magnetic developer which comprises a binder medium having a high electric resistance and particles of triiron tetroxide of an isometric system having...
4495267 Magnetic toner having improved humidity dependency  
Disclosed is a magnetic toner having an improved humidity dependency, which comprises as main ingredients a magnetic material composed of magnetite and a binder medium, wherein the water-soluble...
4487825 Conductive single component electrophotographic magnetic toner  
This invention relates to a conductive single component magnetic dry toner comprised of resins selected from polystyrene allyl alcohol copolymers, and epoxy resins, a magnetic material such as...
4474866 Developer composition containing superparamagnetic polymers  
A color magnetic single component toner composition possessing a magnetic saturation moment of from about 2 emu/gram to about 30 emu/gram comprised of toner resin particles, pigment particles, and...
4473483 Magnetic toner and ink  
A magnetic toner or ink is used in an electrophotography. It comprises a resinous component and a magnetic having a spinel structure and having the formula ##EQU1## wherein M represents at least...
4457996 Tribo induction toner combination for carrierless development  
A toner and development process involving electrostatic development without carrier is disclosed. The toner of the invention is effectively transferred from photoreceptors to plain paper after...
4451837 Conductive single component magnetic toner for use in electronic printing devices  
An improved conductive single component magnetic dry toner composition for use in developing images in electronic printing systems of a conductivity of from 10-6 to 10-8 (ohms/cm)-1, and a fusing...
4450221 Encapsulated lyophilic magnetic particle and resin toner  
A magnetic toner comprising nuclear particles comprising lyophilic magnetic particles and a resin having a low softening point is disclosed. Each of the nuclear particles is surrounded by a resin...
4448870 Magnetic color toner  
Red to sepia magnetic toners stable to heat and light which do not fade or discolor for a long period of time are prepared by incorporating a partially α-transformed γ-Fe2 O3 as a component in a...
4430403 Method of preparing a lithographic printing master  
A process of preparing a lithographic printing master is presented utilizing electrophotographic principles. As a result of the high density, low background images which can be developed using the...
4430407 Heat fusible single component toner having a polyamide binder  
A single component electrophotographic developer composition is disclosed comprising a low melt viscosity polyamide resin and a magnetic oxide component of such particle size as to greatly enhance...
4416964 Dry magnetic developer containing a non-pulverizing agglumerate of cubic magnetite particles  
Disclosed is a dry magnetic developer consisting essentially of a particulate shaped article of a composition comprising a binder resin medium and a powdery magnetic material dispersed in the...
4415645 Developer for electrophotography and process for preparation thereof  
A particulate composite developer for electrophotography is disclosed, which has a novel dispersion structure comprising a continuous phase consisting of a homogeneous mixture of a resin and a...
4414321 Dry composite blended magnetic developer of resin encapsulated fine magnetite and resin encapsulated coarse magnetite  
Disclosed is a dry composite magnetic developer consisting essentially of a particulate shaped article of a composition comprising a binder resin medium and a powdery magnetic material dispersed...
4407925 Process for developing electrostatic images with magnetic toner  
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...
4404269 Developer containing magnetic and non-magnetic toner  
A two-component dry-type composite developer which is a mixture of 100 parts of (A) magnetic toner particles of a binder resin and 40 to 70% by weight of magnetite having a bulk density of at...
4401740 Electrographic development process  
An electrographic development process wherein an electrically charged developer comprising electrically conductive particles with a volume resistivity of 109 Ωcm or less and toner particles with a...
4395485 Dry electrophotographic toner comprising small, polymer coated particles as flow agent  
This is one-component type dry developer for an electrophotography which is improved on humidification ability, and consists of mixture of toner with a particle size of 5.about.50 (μ) and...
4379824 Developer compositions having layer of a pigment on the surface thereof  
A developer composition capable of developing electrostatic images on dielectric surfaces is disclosed. The composition has an electrical conductivity of at least 10-6 ohm-1 centimeter-1 and...
4362802 Powdery developing material for electrophotographic reproduction  
A dry developing powder composition particularly suited for use in electrophotographic reproduction which comprises a magnetic toner of 35 to 50 microns in average particle size mixed with a...
4362803 One-component type magnetic developer for development and transfer of positively charged images  
Disclosed is a one-component type magnetic developer for development of positively charged images and transfer of developed images, which comprises particles of a composition comprising a finely...
4345013 Dual purpose magnetic toner  
A free-flowing, non-spherical, fragmentary, toner particle is prepared by blending a mixture of thermoplastic resins with magnetic iron oxide. The dispersion is processed to a fine powder and dry...
4329415 Magnetic developer and process for preparation thereof  
A composite magnetic developer having a self-friction-chargeability is in the form of fixable magnetic particles having a particle size of 5 to 30 microns and comprising a finely divided magnetic...
4307169 Microcapsular electroscopic marking particles  
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...
4303749 Single component magnetic toner with epoxy resin  
This invention relates to a single component magnetic tone containing an epoxy resin and a magnetic pigment, particularly iron oxide pigments, which have been treated with surface reactive...
4294904 Inductive development materials for a magnetic development process  
An inductive magnetic brush development process comprising forming an electrostatic latent image on a photoconductive surface and contacting the photoconductive surface with a developer mixture...
4293627 Process of developing magnetic images and dry magnetic toner compositions  
This invention is generally directed to toner compositions comprised of a magnetic material and a resin comprising a polymeric esterification product of 1,4-benzenedicarboxylic acid polymerized...
4291111 Nitrogen-containing additives for magnetic toners having hydrophobic and hydrophilic moiety  
Magnetic toners, methods of their formation and utilization of the toners in various electrophotographic imaging systems is disclosed. The toners disclosed contain a nitrogen containing compound...
4288516 Polyester resin containing magnetic toner material and process for its use in flash fuser  
A new magnetic toner comprising a magnetic material and a resin comprising a polymeric esterification product of a dicarboxylic acid and a diol comprising a diphenol is disclosed. This toner is...
4287281 Magnetic toner composition and a method of making the same  
Magnetic toner compositions are prepared using two types of magnetic particles. The first type of magnetic particles have hydrophilic surface characteristics and the second type of magnetic...
4284700 Polymer coated transition metal powder as electrostatic image toner  
A coated powder comprising a transition metal or compound thereof prepared by the process which comprises coating the surface of a powdered transition metal or compound there with a free radical...

Matches 151 - 200 out of 238 < 1 2 3 4 5 >