Eastman-Kodak Company

Frederick Rockwell Chamberlain, Iv

Frederick J Jeffers

Jay D Freeman

Xin Wen

Neil Smith

Robert O James

Tomasz Marek Jagielinski

Thomas D Carr

Bradford D West

Steven J Adamson

Tomasz Mark Jagielinski

Gregory A Burg

Greg A Burg

An ink jet printing apparatus adapted to producing images using inks having predetermined concentrations of a magnetic label material therein, includes a printhead; an ink delivery system adapted to provide inks to the printhead; and a magnetic sensor associated with the ink delivery system, said sensor being sensitive to the magnetic label material in the ink and adapted to produce a signal which is characteristic of the concentration of the label material in the ink; wherein said magnetic sensor includes a horseshoe permanent magnet having first and second pole faces and a pair of magnetic field sensors located symmetrically between said pole faces having their axes of magnetic field sensitivity aligned perpendicular to the fixed field of said permanent magnet such that no signal is produced from said fixed field.

Magnetic sensor for ink detection

A single use camera is preloaded with a roll of magnetically coated film with defined image frames. The camera has an exposure system for selectively exposing an image frame of the film in one of a plurality of image formats. The camera also includes a manually actuated mechanism coupled to a mounted permanent magnet. The magnet is movable to record a magnetic mark on the magnetically coated film at a predetermined location relative to an exposed image frame. The location of the mark is indicative of the image format of the exposed image frame.

Advanced photo system format selector

Apparatus for detecting a magnetic pattern having a plurality of spaced magnetic areas includes an array of magnetic sensors which are configured and spaced from each other to detect the spaced magnetic areas of a magnetic pattern brought into contiguity with the array. Electrical circuitry connects the array of magnetic sensors in series and a single source is provided for supplying current to the array of magnetic sensors through the electrical circuitry.

Contiguously matched magnetic sensor array and magnetic media for

A non-magnetic material such as cardboard or plastic is used as the packaging material for the product to be protected from counterfeiting. The packaging material is configured as a box whose parts are bonded together by use of a hot-melt adhesive. The adhesive contains magnetic particles such as barium ferrite, and small molten globules of adhesive are applied to appropriate surfaces of the box during box fabrication. The box parts are folded to form the finished box, and under the application of pressure the globules of adhesive spread out and solidify, bonding the box surfaces together. It will be noted that presence of the magnetic particles in the adhesive does not modify the box fabrication procedure in any way, and that the box material may be processed and the box's surfaces printed in the usual manner.

Product container containing a magnetic identifier

A medium having an information pattern encoded as changes in two values of a medium characteristic, including start and end key patterns which have characteristic value changes spaced a fixed distance apart, and including intermediate characteristic value changes, which, with the key patterns, encode information. Two sensors are spaced from each other the fixed distance for sensing the medium characteristic value changes as the medium and the sensors are moved relatively to each other, and for producing signals representative thereof. Circuitry for processing the signals from the sensors to produce an information signal is provided.

Dual sensor decoder

A copyright protection system is provided in which copyrighted articles, such as documents and photos, have associated with the article magnetic material which is detected when the article is copied on a scanner/reproducing machine. The magnetic material may be secured to the article so that it cannot be removed without destroying the article, or the magnetic material may form part of the article. The scanner/reproducing machine is provided with a magnetic detection system for automatically detecting the copyrighted article.

Copyright protection for photos and documents using magnetic elements

A credit and access control card and reader system comprising: a magnetically encodable card comprising a body having upper and lower surfaces and side and end edges, the body being formed of plastic material having magnetic particles uniformly dispersed throughout the plastic material; and a reader having a magneto resistive (MR) head for reading the magnetically encodable card as it is moved past the MR head.

Magnetic card and reader system

A camera having an annotation system comprising an optical imaging system for exposing photosensitive media to a scene, a digital imaging system for producing a digital image of the scene, a display for displaying the digital image, a touch sensitive user input layer overlaying the display for inputting annotation data, and a data recorder for recording the annotation data on the photosensitive media.

Full frame annotation system for camera

A dual purpose camera comprising has an optical exposure system for exposing a scene to unexposed film loaded in the camera, thereby producing a latent image in the film, and has an electronic image capture system for producing an electronic image from a developed image on processed film loaded in the camera.

Dual purpose camera

Apparatus for reading magnetically stored data from a wide range of magnetic media. The apparatus includes a magnetoresistive MR head for producing a signal representative of stored magnetic data and a hysteresis comparator circuit for processing the signal from high concentration media. The MR head is preferably a paired MR head having a preamplifier circuit which provides the bias current for the PMR head, amplifies the signal produced by the PMR head, and provides rejection of common mode signals.

Apparatus for sensing magnetic fields from a wide range of magnetic media

A pair of Hall sensors are symmetrically positioned between the poles of a horseshoe magnet. The Hall sensors are mounted in a plane flush with the ends of the magnet faces, and are located equidistant from the centerline of the magnet. A small magnetic object in the field of the magnet, preferably located on the magnet axis, has an induced dipole moment which is detected by the Hall sensors. The small magnetic object dipole field is such that the flux at each Hall sensor is in opposite directions, and by differentially sensing the outputs of the Hall sensors, a signal proportional to the magnetic object is derived. Leakage flux from the magnet as well as the flux of the earth's magnetic field, are in the same direction at both Hall sensors, and their effects are zeroed out by the differential sensing of the Hall sensors' outputs. When the poles of the magnet are drawn across the surface of a non magnetic sheet of conductive material, eddy currents are induced in the sheet by the moving magnetic field. Due to the symmetry of the magnet/sensor arrangement, in a uniform sheet these currents generate identical magnetic fields which result in sensor outputs that cancel. However, a crack or other anomaly in the sheet results in unequal signals at the two sensors, and an output signal proportional to the anomaly occurs.

Method and apparatus for detecting small magnetizable particles and

A camera includes an enclosure having a front surface for supporting an optical section relative to an optical axis intersecting an image receiver supported relative to a back surface, and a lens positioned in the optical axis on the front surface of the camera and projecting a field of view forwardly of the camera. A plurality of thin elements are arrayed on the front surface of the camera around the lens in general correspondence with the field of view. Framing accuracy is improved for self portraits and the like by canting each element outwardly from the optical axis at such an angle that an inside surface of every element is visible to a subject positioned within the field of view of the lens.

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Vista, CA, United States of America

Frederick Rockwell Chamberlain, Iv