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RUTICON USED AS A COLOR SEPARATION DEVICE

IP.com Disclosure Number: IPCOM000023136D
Original Publication Date: 1976-Oct-31
Included in the Prior Art Database: 2004-Mar-27
Document File: 2 page(s) / 322K

Publishing Venue

Xerox Disclosure Journal

Abstract

Generally? a functional color copy is generated by sequentially forming a black and then colored output. This standard of practice can result in registration difficulties, This problem may be avoided by color coding the original document, Thus? by employing yellow and magenta originals with green or blue filters? the parts of the document intended for color printing can be optically separated from the parts intended for black. However? magenta has an unwanted blue absorption which reduces the contrast available for electrophoto- graphic printing during the blue filtered imaging of the yellow part of the document, This difficulty may be circumvented by employing ruticons to enhance optical contrast. Thus, light source 10 illuminates original document 12 disposed upon transparent platen 14. The light rays reflected from original document 12 are trans~ mitted through lens 16 and color filter 18 to form a light image on ruticon 20, A light image formed on ruticon 20 is illuminated by light source 22 and lens 24 operating in association therewith, Light rays reflected from ruticon 20 pass through lens 26 onto ruticon 28, Ruticon 28 produces a light image which

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Page 1 of 2

XEROX DISCLOSURE JOURNAL

RUTICON USED AS A COLOR
SEPARATION DEVICE
Oscar G. Hauser

Proposed Classification
U.S. Cl, 355/4
mt. Cl. G03g 15/01

Generally? a functional color copy is generated by
sequentially forming a black and then colored output.
This standard of practice can result in registration
difficulties, This problem may be avoided by color
coding the original document, Thus? by employing yellow
and magenta originals with green or blue filters? the
parts of the document intended for color printing can
be optically separated from the parts intended for black. However? magenta has an unwanted blue absorption
which reduces the contrast available for electrophoto-
graphic printing during the blue filtered imaging of
the yellow part of the document, This difficulty may
be circumvented by employing ruticons to enhance optical
contrast. Thus, light source 10 illuminates original
document 12 disposed upon transparent platen 14. The
light rays reflected from original document 12 are trans~
mitted through lens 16 and color filter 18 to form a
light image on ruticon 20, A light image formed on
ruticon 20 is illuminated by light source 22 and lens 24
operating in association therewith, Light rays
reflected from ruticon 20 pass through lens 26 onto ruticon 28, Ruticon 28 produces a light image which

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30

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22

Volume 1 Numbers 9/10 September/October 1976 69

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

Page 2 of 2

RUTICON USED_AS A COLOR SEPARATION DEVICE (Cont~d)

is greatly enhan...