Photocopying – Contact printing – Light boxes
Patent
1990-07-05
1991-11-12
Grimley, A. T.
Photocopying
Contact printing
Light boxes
355208, G03G 2100
Patent
active
050651919
ABSTRACT:
Control of the magnetic signal strength of magnetic images is attained selectively (1) by adjusting exposure and (2) by adjusting the toner concentration, wherein the signal strength control is by way of controlling exposure rather by adjusting the toner concentration whenever the desired amount of signal strength control can be attained by adjusting the amount of exposure. Generally, the amount of attainable exposure has minimum and maximum limits; and the toner concentration is adjusted only when an exposure value change is called for which would cause the exposure to exceed those limits. When the toner concentration does need to be adjusted, an excessive amount of adjustment will stop the apparatus and request service. To increase the signal strength of the MICR image, toner replenishment is permitted to continue only for a predetermined amount of time. To decrease the signal strength of the MICR image, high-density prints are generated without replenishing the toner particles.
REFERENCES:
patent: 3712733 (1973-01-01), Giaimo, Jr.
patent: 4534642 (1985-08-01), Miura et al.
patent: 4563086 (1986-02-01), Knapp et al.
patent: 4924263 (1990-05-01), Bares
patent: 4965613 (1990-10-01), Morris et al.
Amering Allan R.
Cyrana Edward M.
Strong Douglas B.
Eastman Kodak Company
Grimley A. T.
Ramirez Nestor R.
Sales Milton S.
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