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Film winding core, and wound film body using same

a film winding and wound film technology, applied in the field of film winding core and wound film body using the core, can solve problems such as difficulties in unwinding film, and achieve the effects of reducing the yield of film-related products and the availability of film, preventing as much as possible the distortion, and increasing the thickness between the thin portion and the thick portion

Inactive Publication Date: 2014-01-02
NITTO DENKO CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The present invention provides a core for winding film that prevents distortion and bending during unwinding, resulting in a higher yield of film-related products and improved availability of the film. The core has multiple film supporting portions that prevent the film from coming into close contact with the core body, reducing the distortion that can be memorialized in the film. The film supporting portions can deform or offset the influence of uneven film thickness. This invention suppresses distortion caused by uneven thickness and prevents instability during film feeding.

Problems solved by technology

The film thus wound on the cylindrical core is distorted (deformed) during storage, which may cause difficulties in unwinding the film.

Method used

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  • Film winding core, and wound film body using same
  • Film winding core, and wound film body using same
  • Film winding core, and wound film body using same

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Embodiment Construction

[0020]Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. Hereinafter, in this description, the film winding core is simply referred to as a “core”.

[0021]As shown in FIG. 1 and FIG. 2, a core 10 is composed of a core body 12, a pair of bearing portions 16, and a plurality of film supporting portions 14. As shown in FIG. 3, a wound film body 100 includes the core 10 and a long film 18 wound on the core 10. The core 10 can be rotated about a rotational axis O. The rotational axis O is an axis passing through the center of the core body 12.

[0022]The core body 12 has a tubular shape. For example, the core body 12 can be formed of a tubular member with both ends open. The cross-sectional shape of the core body 12 is not particularly limited. The shape may be a circle as in the present embodiment, or it may be a polygon. In this core 10, the film 18 is supported directly by the film supporting portions 14. Furthermore, as descri...

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Abstract

A film winding core (10) of the present invention includes a core body (12) and a plurality of film supporting portions (14). The core body (12) has a tubular shape. The plurality of film supporting portions (14) are provided around the core body (12). The film supporting portions (14) protrude from the outer peripheral surface (12p) of the core body (12) respectively at a plurality of positions in a rotational direction of the core body (12) so that a film (18) is supported away from the outer peripheral surface (12p) of the core body (12). Each of the film supporting portions (14) is made of a material that can be deformed when the film (18) is wound on the film winding core (10).

Description

TECHNICAL FIELD[0001]The present invention relates to a film winding core and a wound film body using the core.BACKGROUND ART[0002]A long film is produced by a known method such as extrusion molding and wound on a cylindrical core for storage and shipment. The film thus wound on the cylindrical core is distorted (deformed) during storage, which may cause difficulties in unwinding the film. For example, Patent Literature 1 points out such a problem.[0003]Patent Literature 1 describes a core configured to prevent the distortion of a belt-like article resulting from the contraction of the wound article. Specifically, after the belt-like article is wound on the core in close contact with the outer periphery of the core, the core is contracted in the radial direction thereof. Then, after the core is expanded in the radial direction to increase the contact between the outer periphery of the core and the belt-like article, the belt-like article is unwound from the core.CITATION LISTPatent ...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): B65H75/10
CPCB65H75/10B65H2701/37B65H2701/514B65H2701/1752
Inventor NOUMI, SHUNSUKESAYANAGI, SHUNICHIROU
Owner NITTO DENKO CORP
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