Coreless paper roll manufacturing method

Abstract

A manufacturing method includes: a first step for winding up paper to form paper roll; a second step for inserting an insertion section, which ejects an adhesive, into a center hole of the paper roll; a third step for causing the adhesive to adhere to a predetermined position of the center hole; and a fourth step for performing a heating and drying process on an area to which the adhesive is adhered to harden opposite ends of the center hole. The third step includes causing the adhesive to adhere to near opposite extending ends of the center hole. The adhesive has adhesive strength to an extent that the paper wound up into the roll shape is peelable when the paper roll is to be used. The fourth step includes drying the adhesive adhered to the center hole before the adhesive spreads from the predetermined position of the center hole.

1 . A paper roll manufacturing method comprising:
 a first step for winding up paper to form paper roll having a roll shape;   a second step for inserting an insertion section, which ejects an adhesive, into a center hole of the paper roll;   a third step for causing the adhesive to adhere to a predetermined position of the center hole; and   a fourth step for performing a heating and drying process on an area to which the adhesive is adhered so as to harden opposite ends of the center hole,   wherein the third step includes causing the adhesive to adhere to near opposite extending ends of the center hole, the adhesive having adhesive strength to an extent that the paper wound up into the roll shape is peelable when the paper roll is to be used, and   wherein the fourth step includes drying the adhesive adhered to the center hole before the adhesive spreads from the predetermined position of the center hole.   
     
     
         2 . The paper roll manufacturing method according to  claim 1 ,
 wherein the second step includes inserting the insertion section toward a middle of the center hole from the opposite extending ends of the center hole and increasing a hole diameter at the opposite ends of the center hole to a predetermined size, and   wherein the third step includes causing the adhesive to adhere to areas of the center hole with the increased hole diameter.   
     
     
         3 . The paper roll manufacturing method according to  claim 1 ,
 wherein the third step includes decreasing an adhered amount of the adhesive toward a middle of the center hole from the opposite extending ends of the center hole, and   wherein the fourth step includes performing heating and drying such that the opposite ends of the center hole are maximally hardened.   
     
     
         4 . The paper roll manufacturing method according to  claim 2 ,
 wherein the third step includes decreasing an adhered amount of the adhesive toward a middle of the center hole from the opposite extending ends of the center hole, and   wherein the fourth step includes performing heating and drying such that the opposite ends of the center hole are maximally hardened.