Method and apparatus for bonding polarizing plate

A method for bonding a polarizing plate, comprising:

• a step of cutting a first strip-shaped film including a polarizing plate and a release film bonded thereto with interposition of an adhesive layer, and a second strip-shaped film including a polarizing plate and a release film bonded thereto with interposition of an adhesive layer, when pre-severed end faces of said first and second strip-shaped films along a proceeding direction thereof perpendicular to a longitudinal direction have traveled a distance corresponding to a length of a substrate, so that at least said polarizing plates and the adhesive layers of said first and second strip-shaped films are severed along a direction perpendicular to a longitudinal direction, with the exception of said release layer which remains uncut;
• said first strip-shaped film being supplied from a front plate surface side of substrate being transported, said second strip-shaped film being supplied from a reverse plate surface side of a substrate being transported;
• a direction of an axis of light transmission of said polarizing plate of said second strip-shaped film being perpendicular to a direction of an axis of light transmission of said polarizing plate of said first strip-shaped film when the release film of said second strip-shaped film is bonded to the release film of said first strip-shaped film;
• a step of separating said release films of said first and second strip-shaped films, severed by said cutting of said first and second strip-shaped films;
• and
• a step of bonding a tacky surface of said first film piece, freed of said release film, to a mating front side surface of said first strip-shaped film, so that the severed end face of said first film piece is parallel to the forward end face along the transport direction of said substrate, and bonding a tacky surface of said second film piece, freed of said release film, to a mating reverse side surface of said second strip-shaped film, so that the severed end face of said second film piece is parallel to the forward end face along the transport direction of said substrate.

A method for bonding a polarizing plate, comprising:

• a step of separating a release film from each of a first strip-shaped film and a second strip-shaped film, said first strip-shaped film including a polarizing plate and the release film bonded thereto with interposition of an adhesive layer, said first strip-shaped film being supplied from a front plate surface side of a substrate being transported;
• said second strip-shaped film including a polarizing plate and a release film bonded thereto with interposition of an adhesive layer, said second strip-shaped film being supplied from a reverse plate surface side of a substrate being transported;
• a direction of an axis of light transmission of said polarizing plate of said second strip-shaped film being perpendicular to the direction of the axis of light transmission of said polarizing plate of said first strip-shaped film when the release film of said second strip-shaped film is bonded to the release film of said first strip-shaped film;
• a bonding step of bonding a tacky surface of said first strip-shaped film, freed of said release film, to a mating front plate surface of said substrate so that the proceeding direction of said first strip-shaped film coincides with the transport direction of said substrate, and bonding a tacky surface of said second strip-shaped film, freed of said release film, to a mating reverse plate surface of said substrate so that a proceeding direction of said second strip-shaped film coincides with a transport direction of said substrate;
• and
• a cutting step of severing said first strip-shaped film and the second strip-shaped film, bonded to both surfaces of said substrate by said bonding means, along a direction parallel to forward or rear end face along the transport direction of said substrate.

A method for bonding a polarizing plate, comprising:

• a step of transporting a substrate with one end face of said substrate perpendicular to a proceeding direction;
• a step of bonding a tacky surface of a first film piece, having a polarizing plate, to a mating plate surface piece of said substrate so that a severed end face of said first film piece is parallel to a forward side end face along a transport direction of said substrate;
• a step of changing the direction of transport of the transported substrate and transporting the substrate along the so changed direction;
• and
• a step of bonding a tacky surface of said second film piece to a plate surface of said substrate opposite to a substrate surface to which said first film piece has been bonded, so that a severed end face of said second film piece is parallel to a forward end face along the transport direction of said substrate;
• said second film piece including a polarizing plate and being supplied from the plate surface of said substrate opposite to the substrate surface to which said first film piece has been bonded;
• a direction of an axis of light transmission of said polarizing plate of said second strip-shaped film being perpendicular to a direction of an axis of light transmission of said polarizing plate of said first strip-shaped film when the tacky surface of said polarizing plate is bonded to the tacky surface of said first strip-shaped film.

A method for bonding a polarizing plate, comprising:

• a step of transporting a substrate with one end face of said substrate perpendicular to a proceeding direction;
• a step of cutting along a direction parallel to a forward or rear side end face along the transport direction of said substrate, so that a tacky surface of a first strip-shaped film, having a polarizing plate, bonded to one mating plate surface of said substrate, so that a proceeding direction of the first strip-shaped film is parallel to a forward side end face along the transport direction of said substrate;
• a second transport step of changing the direction of transport of the transported substrate and transporting the substrate along the so changed direction;
• and
• a step of cutting along a direction parallel to a forward or rear end face along the transport direction of said substrate, to a plate surface of which opposite to a plate surface carrying the film piece of the first strip-shaped film has been bonded a tacky surface of said second strip-shaped film, so that the severed end face of the second strip-shaped film is parallel to an end face along the proceeding direction of the substrate;
• said second strip-shaped film having a polarizing plate;
• said second strip-shaped film being supplied from a plate surface side of said substrate transported by said second transport means which is opposite to a substrate surface bonded to said first film piece;
• an axis of light transmission of said polarizing plate of said second strip-shaped film being perpendicular to an axis of light transmission of said polarizing plate of said first strip-shaped film when the release film side of said second strip-shaped film is bonded to the release film side of said first strip-shaped film.

A method for bonding a polarizing plate, comprising:

• a step of separating a release film from a strip-shaped film comprised of a polarizing plate and the release film bonded thereto with interposition of an adhesive layer, said strip-shaped film being supplied from one plate surface of a substrate being transported;
• a step of bonding a tacky surface of said strip-shaped film, freed of said release film, to a mating plate surface of said substrate, so that a proceeding direction of said strip-shaped film coincides with the transport direction of said substrate;
• and
• a step of severing said strip-shaped film, bonded to one surface of said substrate by said bonding, along a direction parallel to a forward or rear end face along the transport direction of said substrate.

A method for bonding a polarizing plate, comprising:

• a step of separating a release film from a strip-shaped film comprised of a polarizing plate and the release film bonded thereto with interposition of an adhesive layer and supplied from one plate surface of a substrate being transported, in a state in which at least the polarizing plate and the adhesive layer are pre-severed, with the release film remaining uncut, so that at least one side of a rectangle corresponding in profile to said substrate in an area of a film surface is perpendicular to a longitudinal direction of the film so as to provide a selvedge of said strip-shaped film other than an inner portion of said rectangle;
• a step of bonding a tacky surface of said inner portion of said rectangle of said strip-shaped film, freed of said release film, to a mating plate surface of said substrate, so that the proceeding direction of said strip-shaped film coincides with the transport direction of said substrate;
• and
• a step of separating said selvedge of said strip-shaped film from said substrate.

A method for bonding a polarizing plate, comprising:

• a step of separating a release film from a strip-shaped film comprised of a polarizing plate and the release film bonded thereto with interposition of an adhesive film, said strip-shaped film being supplied from one plate surface of a substrate transported;
• a step of bonding at least a tacky surface of said strip-shaped film, freed of said release film, to a mating plate surface of said substrate, so that a proceeding direction of said strip-shaped film coincides with a transport direction of said substrate;
• a step of cutting said strip-shaped film within an area in which the strip-shaped film is bonded to said substrate, within a rectangle mating in profile to said substrate, so that at least one side of the rectangle is perpendicular to a longitudinal direction of the film so as to provide a selvedge of said strip-shaped film other than an inner portion of said rectangle;
• and
• a step of separating said selvedge of said strip-shaped film from said substrate.