Method of producing paste container for screen printing apparatus
To keep a printing paste, which is most influential to a printing performance, always in a uniform state, carry out printing at a high accuracy and in a stable manner, and use an expensive paste with no waste, there is provided a printing paste automatic supplying apparatus which supplies a predetermined amount of printing paste ( 5 ) by charging the printing paste ( 5 ) in a printing paste supply bag ( 15 ) and pressurizing the printing paste ( 5 ), provided with a mechanism for opening and closing a printing paste supply port ( 7 ) by bringing a printing paste supply plate ( 6 ) having the printing paste supply port ( 7 ) into contact with the back surface side of a squeegee ( 4 ) and vertically moving them, and further provided with a scraper ( 9 ) which scrapes up the printing paste on a screen printing plate ( 3 ).
1. A method of producing a printing paste charging-container for a screen-printing apparatus, comprising the steps of:
superposing two elastic sheet materials having a substantially rectangular shape on each other;
heat-welding three peripheral sides of the superposed elastic sheet materials to form a bag-like container having welded portions at the three peripheral sides and an open portion at the remaining one peripheral side;
cutting one of said elastic sheet materials along an inner side of one of the opposed peripheral sides;
heat-welding an outer edge of the cut peripheral side onto the other elastic sheet material again;
bonding an adhesive tape on the cut portion of said cut peripheral side;
charging a printing paste into said bag-like container through said open side; and
heat-welding said open side.
2. A method according to claim 1 , further comprising a step of setting said bag-like container charged with the printing paste in a cartridge.
3. A method according to claim 2 further comprising the steps of:
placing said cartridge, in which said bag-like container charged with the printing paste is set, in a screen-printing apparatus, and
peeling off said adhesive tape from said cut portion of said cut peripheral side.