Roll sheet assembly and roll sheet flange

Abstract

There is provided a roll sheet assembly including a cardboard tube, a roll sheet wound around the cardboard tube, and a pair of flanges each disposed at one of both ends of the cardboard tube. The flanges each include a flange main body covering an end face of the roll sheet, a cylindrical body projecting at a center of an inner surface of the flange main body, and being inserted into the cardboard tube, and a fixing unit fixing the cylindrical body being inserted into the cardboard tube to an inner circumferential surface of the cardboard tube. The cylindrical body has a spiral cutting line formed thereon.

What is claimed is: 
     
         1 . A roll sheet assembly comprising:
 a cardboard tube;   a roll sheet wound around the cardboard tube; and   a pair of flanges each disposed at one of both ends of the cardboard tube,   wherein the flanges each include
 a flange main body covering an end face of the roll sheet, 
 a cylindrical body projecting at a center of an inner surface of the flange main body, and being inserted into the cardboard tube, and 
 a fixing unit fixing the cylindrical body being inserted into the cardboard tube to an inner circumferential surface of the cardboard tube, and 
   wherein the cylindrical body has a spiral cutting line formed thereon.   
     
     
         2 . The roll sheet assembly according to  claim 1 , wherein the fixing unit includes a pawl, the pawl projecting on an outer circumferential surface of the cylindrical body, and locking the inner circumferential surface of the cardboard tube. 
     
     
         3 . The roll sheet assembly according to  claim 1 , wherein the spiral cutting line is continuously formed from a base of the cylindrical body with respect to the flange main body to a tip of the cylindrical body. 
     
     
         4 . The roll sheet assembly according to  claim 1 ,
 wherein the roll sheet assembly is capable of being accommodated in a holder, the holder being provided in a printer, and   wherein a convex portion is formed on an outer surface of the flange main body, the convex portion being detected by a sensor provided on the holder.   
     
     
         5 . The roll sheet assembly according to  claim 1 , wherein the spiral cutting line includes perforations or a cutting guide kerf. 
     
     
         6 . The roll sheet assembly according to  claim 1 , wherein, when force is applied to the flange main body in a direction in which the cylindrical body is pulled out from the cardboard tube, the cylindrical body is cut along the spiral cutting line and fixation of the cylindrical body by the fixing unit is released. 
     
     
         7 . A roll sheet flange comprising:
 a disk-shaped flange main body covering an end face of a roll sheet, the roll sheet being wound around a cardboard tube;   a cylindrical body projecting at a center of an inner surface of the flange main body, and being inserted into the cardboard tube; and   a fixing unit fixing the cylindrical body being inserted into the cardboard tube to an inner circumferential surface of the cardboard tube,   wherein the cylindrical body has a spiral cutting line formed thereon.