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Extrusion Screening Nozzle

IP.com Disclosure Number: IPCOM000075149D
Original Publication Date: 1971-Aug-01
Included in the Prior Art Database: 2005-Feb-24
Document File: 2 page(s) / 53K

Publishing Venue

IBM

Related People

Cornell, SW: AUTHOR [+3]

Abstract

An extrusion screening nozzle and nozzle insert for filling via holes and screening a printed circuit on large surfaces are constructed to give uniform wiping of the screening paste from the mask.

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Extrusion Screening Nozzle

An extrusion screening nozzle and nozzle insert for filling via holes and screening a printed circuit on large surfaces are constructed to give uniform wiping of the screening paste from the mask.

Nozzle 1 has an insert 2 which is made of TEFLON*, polyfluorocarbon so that it can easily slide over the surface of the mask, not shown. Insert 2 has two wiping blades 3 and 4 which are connected only at the top 5. Because blades 3 and 4 are unrestrained at their ends 6 and 7, they can deflect evenly across their entire width during the screening operation and do not bow at the center. This permits quality screening over large surfaces. The paste is contained at ends 6 and 7 by nozzle side portions 8 and 9 of 1. * Trademark of E. 1. du Pont de Nemours & Co.

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