Pulp-molded paper lid for beverage cup and method for fabricating the same

A pulp-molded paper lid for a beverage cup and a method for fabricating the same is introduced. While said pulp-molded paper lid bears an external pressure to accommodate the convex-ridge ring of the cup body therein， by preloading of an insertion force of said convex-ridge ring， a generating-elasticity device of said pulp-molded paper lid is pre-compressed to compressively deform， along inward directions respectively opposite to radial directions of said pulp-molded paper lid. By removal of said external pressure， a movable bearing wall and an outermost sidewall of said generating-elasticity device exert two reversed elastically-rebound forces by a stretched deformation occurring therebetween， for clamp-retaining two opposed sides of said convex-ridge ring. Said generating-elasticity device is released from the pre-compression to exert preloaded elastic forces along said radial directions， for strengthening the clamp-retention and avoiding the technical problems of the prior arts.