Patent ID: 6679026
Filing Date: 2004-01-20
Classification: B67B

Abstract:
A device for checking the fitting of a threaded cap onto a container, the device being associated with automatic cap-fitting apparatus, particularly of the carousel type, including rotatable support means which can move at least one container about a principal axis of the apparatus and at least one screwing head for screwing a cap onto a respective container so as to close the container as a result of its movement about the principal axis, in which each screwing head is arranged to screw a cap onto a container with a predetermined tightening torque,wherein the device comprises: first sensor means for identifying a moment at which each screwing head reaches the predetermined tightening torque, second sensor means for detecting an angular position of each screwing head, relative to the principle axis, at which the predetermined tightening torque is reached by the respective head, the first and second sensor means being connected to one another in order to provide an indication that the predetermined tightening torque has or has not been reached by the screwing head within a predefined angular interval of the movement of the screwing head along said circular path, relative to the principle axis of the apparatus, wherein the first sensor means comprise a device for detecting the moving or stopped condition of the respective screwing head, and wherein the detecting device comprises a phonic wheel associated with each screwing head at least one proximity sensor facing each phonic wheel.