B - Operations – Transporting – 41 – F
Patent
B - Operations, Transporting
41
F
B41F 15/00 (2006.01) B23K 3/06 (2006.01) B23K 3/08 (2006.01) H05K 3/12 (2006.01) H05K 3/26 (2006.01) H05K 3/34 (2006.01)
Patent
CA 2112299
A method for screen printing of paste, such as solder paste, onto a board, such as a printed circuit board. The paste (2) is fed into a chamber (1) of a dispenser (A) from a paste supply device connected to the dispenser. The paste fed into the chamber is dispensed onto a first side of the screen (4) and onto the surface of the board (3) from the dispenser through a slit-like aperture (13) therein. In order to be able to obtain high quality screen printing of paste onto a board, residual paste remaining on the screen (4) after the prior pass of the dispenser thereon is cleaned in such a way that the residue remaining on the first side of the screen is removed therefrom by a blade means (34) of first cleaning apparatus (B), that the residue remaining on a second side of the screen is removed therefrom by a blade means (44) of second cleaning apparatus (C) and that the residue (26A) adhered to inner peripheral surfaces of openings (4A) in the screen (4) and the residue (26B) being removed from the second side of the screen are sucked and transported by a vacuum means connected to the second cleaning apparatus.
Macrae & Co.
Tani Denkikogyo Co. Ltd.
LandOfFree
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