Film winding method, film winding apparatus, and film manufacturing apparatus
AssigneeFuji Photo Film Co., Ltd.
InventorsKenji Watanabe, Akio Hiroi, Fujio Kuwabara
Life of this patent
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Abstract
A winding mechanism for winding a narrower web has a drive shaft with a torque transmitting member fixedly mounted thereon, and a holder rotatably mounted on the drive shaft with a spring disposed around an outer circumferential surface of the holder with cushioning members interposed therebetween. Stoppers are disposed respectively in three chambers defined in the holder. A groove is defined in an inner circumferential surface of a winding core around which the narrower web is wound, and the cushioning members are fitted in the groove. A pressing force of the spring is applied through the stoppers to the winding core which is mounted on the holder.
Claims21
A method of winding a web under given tension around a winding core fixed to a holder rotatably mounted on a drive shaft by a torque generating means, by rotating the drive shaft, comprising the steps of:
- detecting in advance torque characteristics of said holder;
- detecting a radius of a roll of the web wound around said winding core which corresponds to a cut length of said web;
- calculating a winding tension of said holder which corresponds to the radius of the roll of the wound web;
- and
- setting a rotational speed of said drive shaft based on said torque characteristics in order to obtain the calculated winding tension.
An apparatus for winding a web, comprising:
- a plurality of winding mechanisms each having a holder rotatably mounted on a drive shaft by a torque generating means, joined members having joining grooves, and lock means for preventing a winding core from being detached from said holder when the web is wound around the winding core;
- said winding mechanisms being joined together as a joined array by joining members fitted in said joining grooves.
An apparatus for manufacturing a film, comprising:
- a roller for taking up variations of tension of a web and detecting a value of the tension;
- a roller for stretching the web to remove wrinkles therefrom;
- a roller for positioning the center of said web;
- a cutting unit having blades for cutting said web into a plurality of webs;
- and
- a plurality of winding mechanisms for winding the cut webs around respective winding cores;
- each of said winding mechanisms having:
- a holder rotatably mounted on a drive shaft;
- joined members having joining grooves;
- and
- lock means for preventing said winding core from being detached from said holder when the web is wound around the winding core;
- said winding mechanisms being joined together as a joined array by joining members fitted in said joining grooves.
Dependencies are inferred from the claim text.