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AUTOMATIC COLOR CONTROL DEVICE

IP.com Disclosure Number: IPCOM000023205D
Original Publication Date: 1977-Feb-28
Included in the Prior Art Database: 2004-Mar-29
Document File: 2 page(s) / 413K

Publishing Venue

Xerox Disclosure Journal

Abstract

A colored disk 10 having a plurality of radially elongated holes 12 is arranged to rotate at a position slightly above a developed test electrostatic latent image 14. The latent image passes under the rotating disk during the copying cycle. This test image can be placed on photoconductive surface 16 between consecutive copying areas 18 or in the

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XEROX DISCLOSURE JOURNAL

AUTOMATIC COLOR CONTROL QEVICE Kallis Mannik
Oscar Hauser

Proposed Classification
U.S. Cl. 427/145
mt. CL B41m 5/16

/6

A colored disk 10 having a plurality of radially elongated
holes 12 is arranged to rotate at a position slightly above
a developed test electrostatic latent image 14. The latent
image passes under the rotating disk during the copying
cycle. This test image can be placed on photoconductive
surface 16 between consecutive copying areas 18 or in the

FIG. I

FIG. 2 /9.

22

26

'428 30

Volume 2 Number 1 January/February 1977 73

[This page contains 1 picture or other non-text object]

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AUTOMATIC COLOR CONTROL DEVICE (Cont'd)

non-image zone. Colored slotted disk 10 has the desired
color of the output copy printed on its periphery 19 and
the process controlling color printed on it.s sprockets 20.
There is one-to-one correspondence between the color of
the unf used toner particles upon the photoconductive sur-
face and the fused toner particles on the output copy.

The unf used toner particles and sprocket colors are com-
pared by means of photodetectors 22, 24 and 26. These
three photodetectors 22, 24 and 26 with red, green and
blue filters 28, 30 and 32 disposed in front thereof are
mounted above the rotating disk. If needed, a transparent
window can be disposed between the unfused toner particles
on test image 14 and disk 10 so as to maintain it sub-
stantially clean. Three photodetectors 22, 24 and 26 in-
termittently see the test image on the photoconductive
surface and the colors of the sprockets...