| 摘要 |
An objective of the present invention is to provide a screen printer capable of printing the whole surface of a flexible printed board where electronic parts have been mounted. In the printer, one pair of paste coating devices 1, 12 is used. In the devices, portions of an elastic squeegee 7, a scraper 8, and the like which correspond to projection portions of a screen plate 11 respectively, are recessed in order to avoid contacting with the projection portions. A printing paste 2 is supplied onto the screen plate at a printing position, and the scraper 8 is scraped the printing paste on the screen plate 11 after finishing the printing, while keeping this state, the whole is moved upward together, and returned to the direction of an original position. These devices 1, 12 are provided at a suitable position of the flexible printed board so as to cross each other, and the flexible printed board is printed successively in the running direction or the direction rectangularly crossing with the running direction of the flexible printed board. The screen plate 11 has the projection portions 11A for covering electronic parts at positions corresponding the electronic parts mounted on the flexible printed board, and has pattern holes 11B, 11C, which are formed between each projection portion 11A and on both end sides in the width direction of the screen plate, at the outsides of the projection portions 11A.
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