Patent ID: 7905176

Claim:
An automatic registration device applied to screen printing machines for facilitating accurate positioning between screens and articles to be printed comprising a base, a printing table and an automatic registration member, wherein the base is disposed under the printing table and a support seat is on the center of the base for connecting and supporting a bottom of the printing table; at least three sets of image capture devices for taking pictures are arranged on an outer circumference of the support seat of the base and two sets of the image capture devices are disposed on one side of the base while the other one set of the image capture devices is disposed on the other side of the base; the printing table is for loading and positioning the articles to be printed and is disposed with a plurality of through holes corresponding to the image capture devices respectively and a light source is disposed on a circumference of the bottom of the printing table, corresponding to each image capture device, for emitting light upward and the light passing the through hole; the automatic registration member is arranged over the printing table and is disposed with a screen that is synchronously driven by the automatic registration member to move in X, Y, Y directions of a plane; wherein the image capture devices take an image of a target of the article to be printed and an image of a target of the screen simultaneously through the through hole; data of the images is calculated by a computer so as to drive the automatic registration member and the screen thereon moving for making the screen positioning to the article to be printed.