Patent ID: 7618359
Filing Date: 2009-11-17
Classification: B31B,B31F,B65D,Y10T

Abstract:
1. A rib-processing apparatus for processing a rib on a side wall of a paper cup body so as to extend in a circumferential direction of the side wall comprising: male and female model members disposed opposite to each other with the side wall therebetween, the male model member being provided on a portion facing the female model member with a projection to form a concave side of the rib, and the female model member being provided on a portion facing the male model member with a groove to form a convex side of the rib, one of the mare and female members being provided on a cup holder and being rotatable together with the cup holder, the cup holder being capable of rotating about an axis thereof vertically extending and insertable near to a bottom of the cup body within the paper cup body to support the cup body from an inside thereof, the other of the male and female members being a press roller disposed outside of the cup body; a radial direction driving device for moving at least one of the male and the female model members in a radial direction of the cup body so as to allow the male and the female model members to close together and open away from each other; a circumferential direction driving device for making a relative rotation between the cup body and the press roller rotatable about an axis parallel to an axis of the paper cup body to change a position at which the side wall is nipped between the male and the female model members in the circumferential direction; and a restraining device, for restraining the paper cup body, provided over the cup holder; wherein the press roller has tapered outer circumferential surface inclining along the side wall of the cup body.