Photocopying – Contact printing – Light boxes
Patent
1994-11-04
1996-12-03
Royer, William J.
Photocopying
Contact printing
Light boxes
118688, 118689, 355204, G03G 2100
Patent
active
055813356
ABSTRACT:
In accordance with the present invention a toner concentration and temperature sensing apparatus is provided for use with a developer container adapted to retain a quantity of developer material, the developer material including varying concentrations of magnetic carrier material and toner material. The toner sensing apparatus includes a micro controller device for controlling a sensing head to selectively generate a magnetic field within the developer container according to a first set of parameters stored in the micro controller. A preselected portion of the developer material is compressed by the magnetic field and a signal is generated across the sensing device and determining the resistance thereof. The signal across the sensing device varies as a function of the concentration of the toner. The micro controller converts the observed signal into a toner concentration value based on a second set of stored parameters. The developer temperature is obtained by measuring a voltage across a coil comprising the sensing device. The change in coil resistance is a linear function of developer temperature.
REFERENCES:
patent: 3604939 (1968-05-01), Maksymisk
patent: 4144550 (1979-03-01), Donohue et al.
patent: 4314334 (1982-02-01), Daughton et al.
patent: 4326646 (1982-04-01), Lavery et al.
patent: 4419010 (1983-12-01), Grombone et al.
patent: 4478509 (1984-10-01), Daughton et al.
patent: 4706032 (1987-11-01), Allen et al.
patent: 4734737 (1988-03-01), Koichi
patent: 4829336 (1989-05-01), Champion et al.
patent: 4901115 (1990-02-01), Nakamura et al.
patent: 4931835 (1990-06-01), Higgins et al.
patent: 4962407 (1990-10-01), Ueda
patent: 4974025 (1990-11-01), Kikuchi
patent: 4980727 (1990-12-01), Stelter
patent: 5012286 (1991-04-01), Kawano et al.
patent: 5053822 (1991-10-01), Butler
patent: 5067435 (1991-11-01), Hosaka
patent: 5081491 (1992-01-01), Lux et al.
patent: 5081498 (1992-01-01), Bares
patent: 5111247 (1992-05-01), Nichols
patent: 5166729 (1992-11-01), Rathbun et al.
patent: 5189475 (1993-02-01), Fournia et al.
patent: 5214476 (1993-05-01), Nomura et al.
patent: 5311261 (1994-05-01), Nakagama et al.
patent: 5353103 (1994-10-01), Okamoto et al.
Borton Michael D.
Carolan Kevin M.
Royer William J.
Xerox Corporation
LandOfFree
Programmable toner concentration and temperature sensor interfac does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Programmable toner concentration and temperature sensor interfac, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Programmable toner concentration and temperature sensor interfac will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-789534