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.
The paste extrusion head, useful in injection printing apparatus of the type described in U.S. Patent 3,384,931, is provided with a mesh screen adjacent the nozzle opening.
English (United States)
This text was extracted from a PDF file.
At least one non-text object (such as an image or picture) has been suppressed.
100% of the total text.
Page 1 of 2
Paste Extrusion Head for Screen Printing Apparatus
The paste extrusion head, useful in injection printing apparatus of the type
described in U.S. Patent 3,384,931, is provided with a mesh screen adjacent the
The paste extrusion head 10 has a tube 12 with a slidable plunger 14 biased
with a piston (not shown) that applies pressure to the paste material 16 contained
in the tube. The paste 16 is forced out of an opening 18 in nozzle 20 into contact
with mask 22 which overlies a ceramic sheet or other substrate 24. In operation,
the paste is forced into contact with the ceramic sheet 24 through openings in
The improvement is providing a mesh screen 26 in the bottom of tube 12
over opening 18. The paste, prior to exiting from the opening 18, must-pass
through the mesh screen 26. This effectively removes any contaminants and
particles which can clog mask-features and via holes in the green sheet, breaks
up any air bubbles in the paste which might otherwise form openings in the
printed pattern, refreshes the paste, and prevents paste dripping during the
return stroke of the head.
Page 2 of 2
[This page contains 1 picture or other non-text object]