Plastic and nonmetallic article shaping or treating: processes – Mechanical shaping or molding to form or reform shaped article – To produce composite – plural part or multilayered article
Patent
1990-12-10
1993-08-03
Silbaugh, Jan H.
Plastic and nonmetallic article shaping or treating: processes
Mechanical shaping or molding to form or reform shaped article
To produce composite, plural part or multilayered article
26427214, 26427215, 264276, B29C 3928, B29C 6708
Patent
active
052326519
ABSTRACT:
A method of sealing electric parts mounted in a bare state on an electric wiring board uses a liquid sealing resin as a printing ink and a screen serving as screen printing means and having apertures in the same pattern as the electric parts mounted on the board. The lower end of a peripheral wall of the screen defining each of the apertures is substantially brought into line-to-line contact with the surface of the board for screen printing. The screen has a recess formed on the rear side of the line contact portion thereof and surrounding the contact portion. These features prevent the printing ink from adhering to the rear side of the screen and the collapse of the sealing resin layer that would occur if the ink adheres to the screen rear sides.
REFERENCES:
patent: 1989702 (1935-02-01), Leguillon
patent: 2724864 (1955-11-01), Krotz
patent: 3384931 (1968-05-01), Cochran et al.
patent: 4264549 (1981-04-01), Utner
patent: 4336009 (1982-06-01), Wolf
Hashimoto Tsunekazu
Inoue Masajiro
Nagai Koichiro
Okuno Atsushi
Japan Rec Co., Ltd.
Ortiz Angela
Silbaugh Jan H.
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