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US 6,632,312 B1Granted
Method for manufacturing tubular film
AssigneeCanon Kabushiki Kaisha
InventorHitoshi Katsuyama
Life of this patent
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Abstract
A tubular film manufacturing method includes the steps of winding a sheet film on a cylindrical member, cutting a winding end portion of the sheet film, and inserting the cylindrical member, on which the sheet film is wound, into a tubular mold member. The sheet film is molded into a tubular film by heating. In the inserting step, the cylindrical member is inserted into the tubular mold member while the winding end portion of the sheet film is pressed by an elastically deformable brush member.
Claims1
A tubular film manufacturing method comprising the steps of:
- winding a sheet film on a cylindrical member;
- cutting a winding end portion of the sheet film;
- inserting the cylindrical member, on which the sheet film is wound, into a tubular mold member;
- and
- molding the sheet film into a tubular film by heating the sheet film.
- wherein, in the inserting step, the cylindrical member is inserted into the tubular mold member while the winding end portion of the sheet film is pressed by an elastically deformable brush press member.
3 more elements
Dependencies are inferred from the claim text.