Patent ID: 9375915
Filing Date: 2016-06-28
CPC Classification: B41F,B41M,B41P,H05K

Claim Text:
1. A screen printing machine, comprising: a mask that is brought into contact with a substrate; a squeegee; a squeegee shift control portion that performs a squeegeeing operation comprising: placing the squeegee to contact the mask; shifting the squeegee in a horizontal direction while abutting the squeegee against the mask brought into contact with the substrate to slide the squeegee on the mask, thereby scraping up the paste on the mask so that opening portions provided in the mask are filled with the paste to transfer the paste onto the substrate; and separating the squeegee from the mask; a front clamp member and a rear clamp member that clamp and hold the substrate; a paste supply portion; and a control device configured to determine whether there is a need to supply paste, when the control device determines there is a need to supply paste, the control device being configured to control the paste supply portion to supply a larger amount of the paste to regions in which the paste is scraped up by end portions of the squeegee than a region in which the paste is scraped up by a center portion of the squeegee on the mask such that distribution of the paste on the mask becomes even along a longitudinal direction of the squeegee and such that a rotating diameter of the paste rolled on the mask becomes even along the longitudinal direction of the squeegee when the squeegeeing operation is performed, after at least one squeegeeing operation is performed and at least before the paste is transferred onto the substrate by the squeegee in a next squeegeeing operation, wherein after the at least one squeegeeing operation, the control device is configured to move the squeegee up to separate from the mask and move the paste supply portion above one of the front clamp member or the rear clamp member to supply paste and the control device is configured to move the squeegee to outside of the supplied paste from the opening portions.