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US 7,678,300 B2Granted
Optical film manufacturing method and apparatus
AssigneeKonica Minolta Opto, Inc.
InventorSyouichi Sugitani
Life of this patent
Estimating the term…
Abstract
An optical film manufacturing method, comprising steps of: forming a film by casting a liquid-state resin; embossing both ends of the formed film in a lateral direction of the film so as to form embossed sections for conveying the film; conveying the film having the embossed sections by a freely rotatable conveyance roller; trimming and removing the embossed sections of the film after the conveying step; and winding up the film.
Claims16
An optical film manufacturing method, comprising steps of:
- forming a film by casting a liquid-state resin;
- embossing both ends of the formed film in a lateral direction of the film so as to form embossed sections for conveying the film;
- conveying the film having the embossed sections by a freely rotatable conveyance roller in a drying room;
- trimming and removing the embossed sections of the film after the conveying step;
- and
- winding up the film,
- wherein in the drying room, the film is dried under a drying atmosphere with a drying temperature, and at the embossing step, the embossed sections are formed with an embossing member heated to an embossing temperature higher than the drying temperature.
4 more elements
An optical film manufacturing apparatus, comprising:
- a casting section for forming a film by casting a liquid- state resin;
- an embossing section for embossing both ends of the film in a lateral direction of the film so as to form embossed sections for conveying the film;
- a conveying section for conveying the film having the embossed sections by a freely rotatable conveyance roller in a drying room;
- a trimming section for trimming and removing the embossed sections of the film after conveying the film;
- and
- a winding section for winding up the film,
- wherein the drying room is operable to dry the film under a drying atmosphere with a drying temperature, and the embossing section has an embossing member heated to an embossing temperature higher than the drying temperature during the formation of the embossed sections.
4 more elements
Dependencies are inferred from the claim text.