Xerox Corporation

Eugene C Faucz

Alain E Perregaux

Narayan V Deshpande

Daniel F Blossey

Stephen F Pond

Ram S Narang

Klaus K Stange

Werner E Haas

Joseph F Stephany

Virgil Joseph Hull

Stanley B Swackhamer

An optical shield for a liquid crystal dot shutter image bar and fabrication process therefor. In one embodiment, a layer of dye-in-photoresist is formed on the interior surface of one of the glass substrates and over the one or more electrodes thereon. The photoresist layer is exposed through a mask and developed to form an optical shield having the desired configuration of optical apertures and a thickness of 2 to 3 micrometers. Alternate embodiments use two separate dye loaded layers that do not react with each other or dissolve in similar solvents. The first layer is dye loaded PMMA layer covered by a dye-in-photoresist. The dye can be selected to filter any desired spectral region.

Optical Shield for liquid crystal devices and method of fabrication

The invention is a liquid crystal material between horizontal and vertical electrodes. A xerographic drum is placed underneath the electrodes/liquid crystal configuration and an optical system provides light or no light at the intersection of the electrodes to be focused on the xerographic drum. A single line of data is created by printing first the odd elements of the data and then the even elements. First, data is clocked into a shift register coincident with clock pulses. This is the data for the next line to be printed or displayed and not the presently printed or displayed line of odd bits. When the new line has been completely shifted in, a latch pulse transfers the data to latches, a one line parallel in parallel out buffer. Then, on the even half of the cycle, the even bits of data which have been shifted in while the odd dots are being printed, are latched to the drivers.

Multiplexing of transient image bar

An electrophotographic magnetic imaging member comprises a conductive, magnetizable layer in contact with a photoconductive layer. An electrostatic latent image is formed on the photoconductive layer utilizing the conductive, magnetizable layer as a conductive electrode in carrying out the electrophotographic discharge step. The conductive, magnetizable layer is also magnetized with a selected spatial wavelength of magnetic transitions. The electrostatic latent image is developed with toner which reflects or absorbs visible electromagnetic radiation. The imaging member is exposed to visible electromagnetic radiation from the photoconductive side. In one embodiment, the visible radiation is absorbed or reflected by the toned image and is transmitted through uncovered portions of the photoconductor, heating the conductive, magnetizable layer and thermoremanently erasing magnetic transitions in the magnetizable layer. In another embodiment, the visible radiation is absorbed by a thin photoconductive layer in uncovered portions of the photoconductor, which uncovered portions transport the absorbed heat to the conductive, magnetizable layer which thermoremanently erases magnetic transition in the magnetizable layer. The magnetizable layer in both embodiments is thereby provided with a magnetic latent image corresponding to the electrostatic latent image.

Electrophotographic-magnetic duplex imaging structure and method

A storage buffer for a moving web comprises a collection bin having an opening through which the web can be randomly dumped under the influence of gravity; means for floating randomly dumped web within the collection bin upon a cushion of gas without mechanical support of said web; a web exit within a wall of said collection bin; and means for guiding pressurized gas over web passing through the web exit.

Random-dump storage buffer for moving web

A storage buffer for a moving web comprises a collection bin having a bottom triangular cavity, a top opening through which the web can be randomly dumped under the influence of gravity and a bottom opening through which the web is withdrawn from the collection bin on a first-in, first-out basis. The sloping bottom walls of the collection bin are provided with ridges to assure the maintenance of a gas bearing beneath the bottom-most layer of exiting web. Nozzles for directing pressurized gas into the collection bin are located on both sides of the web at the collection bin exit.

A magnetic imaging system wherein a magnetizable recording member comprising a substrate overcoated with a magnetic recording layer of magnetic particles dispersed in a binder is exposed to high energy light pulses of sufficient energy effective to cause or allow the removal of said magnetic recording layer in exposed regions thereof. Imagewise configured high energy light pulses result in the removal of imagewise configured portions of the magnetic recording layer. Removal of portions of the magnetic recording layer can occur either before or after magnetization of the magnetizable recording member and upon development with magnetic toner, a complementary magnetic toner image is formed and can be transferred to a receiving medium to form hard copy. The system is particularly applicable to the formation of a magnetic master which is used to form the same magnetic toner image numerous times.

Magnetic imaging system using heat

Process and apparatus for creating a magnetic latent image capable of being rendered visible with magnetic toner without image deletion. An area of interest on a magnetizable member is recorded with a first substantially uniform spatial pattern of magnetic transitions having a transition wavelength .lambda..sub.1 capable of retaining magnetic toner on the magnetizable member and effective to substantially completely cover the area of interest upon development with magnetic toner. A second spatial pattern of magnetic transitions having a transition wavelength .lambda..sub.2 is then recorded in the area of interest in one of imagewise and background configuration; the second spatial pattern of magnetic transitions having a transition wavelength .lambda..sub.2 incapable of retaining said magnetic toner on said magnetizable member, wherein .lambda..sub.1 is greater than .lambda..sub.2 thereby effectively selectively 'erasing' the first spatial pattern of magnetic transitions with respect to visible developability with magnetic toner.

Magnetic latent image creation

A thermoremanent magnetographic imaging apparatus is disclosed. The apparatus includes an imaging transfer station which thermoremanently copies a graphic representation from a slave web onto the magnetizable surface of a master web. The thermomagnetic transfer is produced by exposing the slave and master webs while in intimate contact to a single intense burst of radiation from a flash lamp. The flash lamp is coaxially located within a transparent cylindrical carriage means which peripherally supports the slave and master webs during a full frame transfer process. Dual locking assemblies firmly hold the slave web and master web motionless during the thermomagnetic process to aid in the prevention of registration problems.

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Webster, NY, United States of America

Eugene C Faucz