TONER CONTROL SYSTEM AND METHOD FOR ELECTROGRAPHIC PRINTING

Toner control system and method for an electrographic printer in which toner is delivered from a reservoir to a toner fountain and there applied to an electro- statically charged sheet to form an image. The visual quality of the image is monitored, and toner concentrate is added to the toner in resp...

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Main Authors CLARK, L. DOUGLAS, BOWERS, HARRY
Format Patent
LanguageEnglish
French
Published 10.09.2002
Edition5
Subjects
CINEMATOGRAPHY
ELECTROGRAPHY
ELECTROPHOTOGRAPHY
HOLOGRAPHY
MAGNETOGRAPHY
PHOTOGRAPHY
PHYSICS
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Abstract Toner control system and method for an electrographic printer in which toner is delivered from a reservoir to a toner fountain and there applied to an electro- statically charged sheet to form an image. The visual quality of the image is monitored, and toner concentrate is added to the toner in response to the monitored quality to increase the amount of pigment particles in the toner and thereby maintain a substantially constant image quality. The concentrate is added to the toner in a return line between the fountain and the reservoir in relatively small, predetermined amounts, and it is mixed before being added. In the disclosed embodiments, a test image is formed outside the main image on the sheet, and the brightness of one or more predetermined colors in the test image is monitored. This system and method are applicable both to monochrome images and to multicolor images.
AbstractList Toner control system and method for an electrographic printer in which toner is delivered from a reservoir to a toner fountain and there applied to an electro- statically charged sheet to form an image. The visual quality of the image is monitored, and toner concentrate is added to the toner in response to the monitored quality to increase the amount of pigment particles in the toner and thereby maintain a substantially constant image quality. The concentrate is added to the toner in a return line between the fountain and the reservoir in relatively small, predetermined amounts, and it is mixed before being added. In the disclosed embodiments, a test image is formed outside the main image on the sheet, and the brightness of one or more predetermined colors in the test image is monitored. This system and method are applicable both to monochrome images and to multicolor images.
Author CLARK, L. DOUGLAS
BOWERS, HARRY
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DocumentTitleAlternate SYSTEME ET METHODE DE REGULATION DU TONER, DESTINES A L'IMPRESSION ELECTROGRAPHIQUE
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Snippet Toner control system and method for an electrographic printer in which toner is delivered from a reservoir to a toner fountain and there applied to an electro-...
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SubjectTerms CINEMATOGRAPHY
ELECTROGRAPHY
ELECTROPHOTOGRAPHY
HOLOGRAPHY
MAGNETOGRAPHY
PHOTOGRAPHY
PHYSICS
Title TONER CONTROL SYSTEM AND METHOD FOR ELECTROGRAPHIC PRINTING
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