Can lid opening tab, can lid, method for manufacturing can lid opening tab

Abstract

A can lid opening tab includes: a pulling-up part provided on one end side in a longitudinal direction; a pressing-down part provided on another end side in the longitudinal direction; a fixing part provided between the pulling-up part and the pressing-down part, and sectioned and formed by a U-shaped slot, and fixed on a can lid body; and the curling part formed continuously on the circumference except for a connecting piece cutting trace provided at the pressing-down part. A step-less unprocessed deflection face with the periphery surrounded without disconnection by the curling part is provided between the fixing part and the pulling-up part, and a display part is provided on at least one face side of the deflection face.

1 . A can lid opening tab, comprising:
 a pulling-up part provided on one end side in a longitudinal direction;   a pressing-down part provided on another end side in the longitudinal direction;   a fixing part provided between the pulling-up part and the pressing-down part, sectioned and formed by a U-shaped slot, and to be fixed on a can lid body; and   a curling part formed continuously on a circumference except for a connecting piece cutting trace provided at the pressing-down part,   wherein a step-less unprocessed deflection face with a periphery surrounded without disconnection by the curling part is provided between the fixing part and the pulling-up part, and   a display part is provided on at least one face side of the deflection face.   
     
     
         2 . The can lid opening tab according to  claim 1 , wherein the display part is a drawing part drawn by laser marking or ink jet printing. 
     
     
         3 . The can lid opening tab according to  claim 1 , wherein the deflection face has a smooth deflection shape such that an amount of deflection is maximized at a position closer to a fixing part side than to a center from a circumference. 
     
     
         4 . The can lid opening tab according to  claim 1 , wherein maximum amount of deflection in the deflection face is 0.2 mm or more. 
     
     
         5 . A can lid, comprising:
 the can lid opening tab according to  claim 1 ; and   a can lid body to which the fixing part is fixed, and which has a score to be ruptured by pressing down of the pressing-down part.   
     
     
         6 . A method for manufacturing a can lid opening tab, including:
 displaying of drawing a display part on at least one face side of a long tab material;   forming a pair of hole parts for forming a connecting piece extending in a longitudinal direction of the tab material at positions separated in the longitudinal direction from the display part, forming a U-shaped slot for sectioning and forming a fixing part between the display part and the connecting piece, and forming a cut line for connecting the pair of holes and defining an outside of a circumference edge;   bend processing an inside of the cut line along a circumference shape of a tab; and   curling of curl processing a bent piece formed by the bend processing, and forming a curling part at a periphery of the tab except for the connecting piece,   wherein for the curling, a lower tool having a die part for subjecting the bent piece to curl shaping, and an upper tool for pressing the tab material against the lower toll are used, and   the lower tool has an opening part for making the display part unprocessed.   
     
     
         7 . The method for manufacturing a can lid opening tab according to  claim 6 , wherein the opening part is provided with a movable support member descending according to curve deformation of the tab material including the display part formed thereon. 
     
     
         8 . The can lid opening tab according to  claim 3 , wherein maximum amount of deflection in the deflection face is 0.2 mm or more.