Film production method and film production device

A film producing apparatus, comprising:

• a defect information obtaining section configured to obtain defect information including information on a position of a defect in a film original sheet, wherein the defect information indicates the presence or absence of defectiveness in each of a plurality of divisional regions arranged on a surface of the film original sheet in a width direction of the film original sheet;
• a slitting section configured to slit the film original sheet along a slit line, extending in a longitudinal direction of the film original sheet, so as to produce a plurality of films, wherein each of the plurality of films includes at least one of the plurality of divisional regions or a portion of the at least one of the plurality of divisional regions, the at least one of the plurality of divisional regions including at least one border divisional region that is adjacent to or overlaps the slit line;
• and
• a determining section configured to carry out defectiveness determination for the plurality of films on a basis of the defect information, wherein if the at least one border divisional region has the defect, one of said films including the at least one border divisional region or including a portion of the at least one border divisional region and another of said films adjacent across the slit line to the film including the at least one border divisional region or including the portion of the at least one border divisional region are each considered to be a defective film.

A film producing method, comprising the steps of:

• (a) obtaining defect information including information on a position of a defect in a film original sheet, wherein the defect information indicates the presence or absence of defectiveness in each of a plurality of divisional regions arranged on a surface of the film original sheet in a width direction of the film original sheet;
• (b) slitting the film original sheet along a slit line, extending in a longitudinal direction of the film original sheet, so as to produce a plurality of films, wherein each of the plurality of films includes at least one of the plurality of divisional regions or a portion of the at least one of the plurality of divisional regions, the at least one of the plurality of divisional regions including at least one border divisional region that is adjacent to or overlaps the slit line;
• and
• (c) carrying out defectiveness determination for the plurality of films on a basis of the defect information, wherein
• if the at least one border divisional region has the defect, one of said films including the at least one border divisional region or including a portion of the at least one border divisional region and another of said films adjacent across the slit line to the film including the at least one border divisional region or including the portion of the at least one border divisional region are each considered to be a defective film.