Patent ID: 7757737
Filing Date: 2010-07-20
Classification: B29K,B32B,G02B,G02F,Y10S

Abstract:
1. A film bonding apparatus for bonding a film having a dichroic property to a film having a birefringent property at an arbitrary angle, comprising: an unwinder for the film having the dichroic property in a roll state; an unwinder for the film having the birefringent property in a roll state; a rewinder for the film having the dichroic property in the roll state; a rewinder for the film having the birefringent property in the roll state; a device for punching out one of the film having the dichroic property or the film having the birefringent property; a detector for the film having the dichroic property for detecting the angle of the axis thereof whose absorption is maximized or minimized in the plane thereof; and a detector for the film having the birefringent property for detecting the delay phase axis thereof in the plane thereof, wherein an angle between the unwound film having the dichroic property and the unwound film having birefringent property is controlled to bond together the films using the detector for the film having the dichroic property and the detector for the film having birefringent property, wherein after the films are bonded, the device for punching out one of the film having the dichroic property or the film having the birefringent property punches out the one film, wherein one of the films remaining upon punching-out is cut off from the other films, and the film having the dichroic property and the film having the birefringent property are wound in a roll state, and wherein a roll of bonded product is manufactured by continuously carrying out bonding.