Inspection device of winding appearance of tape and improvement processing method for the same

Abstract

To provide a winding appearance inspection device of a tape capable of gathering a line speed in an inspection process, as well as capable of inspecting a winding appearance of the tape wound on a roll body core, even in a reel having a flange formed in a roll body core (a roll body core). Winding appearance inspection device 10 serves as a device that evaluates the winding appearance of the tape such as film T or the like wound on roll body core H, comprising light projector 12 that irradiates a light along winding surface S of the tape such as film T or the like that at least partially passes near the roll body core H, and receiver 13 that receives the light.

Description

DETAILED DESCRIPTION OF THE INVENTION TECHNICAL FIELD OF THE INVENTION [0001] This invention relates to an inspection device of a tape that inspects a winding appearance such as a magnetic tape or web wound on a roll body core, and an improvement processing method capable of improving a disturbed winding of the tape taken up on a tape reel. BACKGROUND OF THE INVENTION [0002] Generally, a tape in a belt-like form of paper, plastic film, or metal foil, is shipped in a state of taken up on a tape reel. As for the tape thus taken up on the tape reel, when a winding appearance is not in good state, the magnetic tape of good appearance is not obtained, and also the projecting part of the tape from a winding surface formed by tape edges may be damaged when dropped. Therefore, inspection about the winding appearance has been performed conventionally. [0003] The conventional inspection device of the winding appearance is disclosed in JP-A-2000-337827. In the inspection device, the winding ap...

AI Technical Summary

Benefits of technology

[0014] According to one exemplified aspect of the present invention, there is provided a winding appearance inspection device of the tape, for example. When the winding appearance of the tape wound on the roll body core having an opaque flange is inspected, by irradiating the light from the light projector along the winding surface of the tape, the light arrives at the receiver passing through between the winding surface and the flanges. Here, the light partially passes near the roll body core, and when the tape projects from the winding surface, the light is certainly interrupted by this projected tape, and the quantity of the light received by the receiver decreases compared with a regular state without the projected tape. Accordingly, even if the tape is wound on the roll body core having an opaque flange formed, the winding appearance can be inspected certainly.

[0019] In order to overcome the second problem, in the winding appearance improvement processing method of the magnetic tape, after predetermined quantity of the magnetic tape is taken up on the roll body core of the tape reel, predetermined time heat treatment of the magnetic tape is applied at a temperature just below a glass transition temperature of the material used for a support base of the magnetic tape, so that a natural curl may be effectively formed.

[0020] According to another exemplified aspect of the present invention, there is provided a winding appearance improvement processing method of the magnetic tape. Wherein after predetermined quantity of the magnetic tape is taken up on the roll body core of the tape reel, predetermined time heat treatment of the magnetic tape is applied at a temperature just below a glass transition temperature of the material used for a support base of the magnetic tape, so that a natural curl may be effectively formed in the winding appearance of the magnetic tape taken up on the tape reel. Thus, the winding appearance of the magnetic tape can always be maintained in a good winding appearance. Consequently, the disturbed winding appearance of the magnetic tape taken up on the tape reel is avoided, when using the magnetic tape cartridge constituted including the tape reel.

[0022] In addition, according to the exemplified aspect of the present invention, there is provided a winding appearance improvement processing method of the magnetic tape. Wherein predetermined time heat treatment of the magnetic tape is applied at a temperature lower than a glass transition temperature of the material used for the support base of the magnetic tape by 5 to 10° C., so that a natural curl may be effectively formed. Especially when polyethylene terephthalate (PET) and polyethylene naphthalate (PEN) are used for the support base of the magnetic tape, by applying the heat-treatment onto the magnetic tape at a temperature just below a glass transition temperature, the natural curl may be more effectively obtained.

Problems solved by technology

As for the tape thus taken up on the tape reel, when a winding appearance is not in good state, the magnetic tape of good appearance is not obtained, and also the projecting part of the tape from a winding surface formed by tape edges may be damaged when dropped.

However, in an inspection device that inspects a winding appearance disclosed in JP-A-2000-337827, the inspection of the winding appearance is enabled when the flange formed in the roll body core is transparent, whereas, when the flange is opaque, it is impossible to inspect the winding appearance of the magnetic tape.

Therefore, when the flange is provided in the roll body core, the winding appearance of the magnetic tape cannot be inspected.

Moreover, in this device, it takes time for the measuring device to be approached to the magnetic tape or spaced apart therefrom, or it takes time for the pressure to be stabilized after suction of the air is performed.

Moreover, when the tape is taken up on the tape reel already incorporated in the cassette, in order to improve disturbed winding, a method for mitigating the disturbed winding by using an endless belt and a touch roll cannot be used.

In addition, even if the winding appearance of the tape is improved by using the endless belt or the touch roll, the disturbance may be generated while repeatedly using the tape.

That is, there is involved a problem such that the winding appearance of the magnetic tape MT can not be maintained in a fixed winding appearance.

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