Magnetic latent image creation

Details Magnetic latent image creation Magnetic latent image creation

G - Physics

03

G

314/6

G03G 19/00 (2006.01)

Patent

CA 1102394

MAGNETIC LATENT IMAGE CREATION ABSTRACT OF THE DISCLOSURE 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.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.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.? incapable of retaining said magnetic toner on said magnetizable member, wherein .lambda.1 is greater than .lambda.2 thereby effectively selectively "erasing" the first spatial pattern of magnetic transitions with respect to visible developability with magnetic toner.

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