The following operators can be used to better focus your queries.
( ) , AND, OR, NOT, W/#
? single char wildcard, not at start
* multi char wildcard, not at start
(Cat? OR feline) AND NOT dog?
Cat? W/5 behavior
(Cat? OR feline) AND traits
Cat AND charact*
This guide provides a more detailed description of the syntax that is supported along with examples.
This search box also supports the look-up of an IP.com Digital Signature (also referred to as Fingerprint); enter the 72-, 48-, or 32-character code to retrieve details of the associated file or submission.
Concept Search - What can I type?
For a concept search, you can enter phrases, sentences, or full paragraphs in English. For example, copy and paste the abstract of a patent application or paragraphs from an article.
Concept search eliminates the need for complex Boolean syntax to inform retrieval. Our Semantic Gist engine uses advanced cognitive semantic analysis to extract the meaning of data. This reduces the chances of missing valuable information, that may result from traditional keyword searching.
Selective color printing is achieved by using a single energy pulse to activate the oxidant-catalyst on coated paper, followed by separate treatmant of the activated paper with various leucodyes.
English (United States)
This text was extracted from a PDF file.
This is the abbreviated version, containing approximately
65% of the total text.
Page 1 of 1
Method for Selective Color Printing
Selective color printing is achieved by using a single energy pulse to activate
the oxidant-catalyst on coated paper, followed by separate treatmant of the
activated paper with various leucodyes.
In electrochromic printing a multiple color print is achieved in a two-step
procedure. Oxidant is generated on the surface of paper in the absence of
leucodye. In a second stage the appropriate leucodye is applied to the paper to
generate a designated dye color on the paper. Alternate lines of color characters
can be formed in this way.
A colorless leucodye (LD) is coated on paper together with a
concentrated electrolyte solution containing bromide. Upon
activation of the paper surface with moisture, the surface becomes
electrically conductive. The introduction of a suitable print pulse
produces colored dots by the conversion of LD by a coupled pair of
Step 1. 2 Br approaches Br + 2e : print pulse
Conventionally, the electrolyte and LD are present together in either the
pretreated paper or the aqueous printing ink. Only a single color can be
generated with a given coating.
PROPOSAL. The bromide approaches bromine reaction does not need to be
coupled intimately with the LD approaches Dye conversion reaction. Paper can
be coated with only the bromide electrolyte immediately prior to printing or
electrolyte pretreated paper can be activated by the application of...