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.
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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.
The apparatus shown above prints copies that have a very high resolution. The apparatus is useful, for example, for printing data records that can be read optically.
English (United States)
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High Resolution Duplicator
The apparatus shown above prints copies that have a very high resolution.
The apparatus is useful, for example, for printing data records that can be read
A metal drum 2 has its outer cylindrical surface coated with a photoresist 3
that is exposed to form a selected pattern of openings 4. A brush 5 connects the
drum hub 6 to the positive terminal of a voltage source 7 to charge the surface of
the drum. Toner particles 9 are held in a container 10, and developer brushes 12
and 14 pick up a thin layer of toner particles. A brush 15 connects the hub of
developer brush 14 to the grounded terminal of voltage source 7. Toner particles
represented schematically at 17 are electrostatically attracted from developer
brush 14 to drum 2 by the nonlinearity in the electric field established by source 7. The toner particles are attracted to the surface of the drum in exposed regions
Toner particles in the pattern established by the photoresist are transferred
from the drum to a web 19 that travels in the direction shown by the arrows and
is held against the surface of the drum by a roller 20. The incoming portion of the
web is given a surface charge from a voltage source that is not shown, and toner
particles are transferred from drum to web 19 with only low pressure on roller 20.
The toner particles located on the outgoing portion of the web are fixed by a heat
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