Patent ID: 7776172
Filing Date: 2010-08-17
Classification: B65H

Abstract:
1. A web joining apparatus, comprising: a turret arm which supports an old roll and a new roll around which band-state flexible support bodies are wound capable of drawing and is rotatable per predetermined angle; a front pasting drum provided with a holding device which holds the tip end of the band-state flexible support body of the new roll to which a double-sided joining tape is pasted on the back side of the tip end and capable of rotation at the same speed as the conveying speed of the band-state flexible support body at the joining of the band-state flexible support body; and a cutting drum provided with a cutting member with substantially the same length as the width of the band-state flexible support body, the cutting member being provided on circumferential surface and in which a projection amount from the circumferential surface is set so that only a single sheet of the band-state flexible support body can be cut off, and which cuts off only the band-state flexible support body of an old roll in a state where the band-state flexible support bodies of the old and a new rolls wound and held around the front pasting drum are overlapped with each other, the cutting drum being capable of rotation at the same speed as the conveying speed of the band-state flexible support body at the cutting of the band-state flexible support body, wherein the band-state flexible support body of the old roll is cut off and the tail end of the band-state flexible support body of the old roll and the tip end of the band-state flexible support body of the new roll are joined to each other while the band-state flexible support body is being conveyed.