Abstract: Improved means and method for information transfer through magnetic field pulses over an area and at electronic information flow rates consisting of establishing a bias level magnetic field just below the threshold field strength required to transfer information by means of magnetic recording, then adding to the bias field by sequentially inducing low field strength magnetic fields from high speed, low current electrical signals sweeping through an x, y solenoid matrix, the combination effecting microsecond rate magnetic recording and information transfer onto a magnetochemical surface.

Abstract: Improved apparatus and method for continuously producing high sensitivity magnetochemical particles consisting of joined pairs of pre-oriented magnetic metallic spheres which have been heat treated, magnetically annealed, then plated with color forming metals and overcoated with a chemically resistant coating. These spheres are vibratorially and frictionally seated in surface dimples impressed on the opposed surfaces of a film formed in a mobius loop. The dimples are formed in back-to-back registry by passing the film material through mirror image half-tone screen carrying impressing cylinders. A resin coating applied to the surface of the film loop encases and binds the spheres into mirror image groups; and while the resin coating is still fluid, a directional magnetic field is applied to rotate and orient the encased spheres so that their preferred directions for magnetic field propagation are parallel to the surface of the film loop.