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Magnetic tape cartridge

a tape cartridge and magnetic technology, applied in the field of magnetic tape cartridges, can solve the problems of affecting the smooth operation of the tape leader pin, the inability to pull the tape leader pin through the tape leader opening, and the prone to burrs at the edge, so as to prevent an increase in the sliding resistance

Inactive Publication Date: 2005-04-28
FUJIFILM HLDG CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

This approach reduces sliding resistance and prevents wear on the spring member, allowing for smooth operation and easy replacement of the tape leader pin, ensuring consistent performance over time.

Problems solved by technology

As a result, the pulling-in-and-out of the tape leader pin through the tape leader opening cannot be smoothly performed.
In the worst case, the pulling-in-and-out of the tape leader pin cannot be performed at all.
In addition, in the case that the spring member is formed from a plate spring, it is punched out from a plate, and consequently, burrs are liable to occur at the edge.
Consequently, the pulling-in-and-out of the tape leader pin through the tape leader opening cannot be smoothly performed.
In the worst case, there is a fear that the pulling-in-and-out of the tape leader pin cannot be performed at all.

Method used

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  • Magnetic tape cartridge
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Examples

Experimental program
Comparison scheme
Effect test

first embodiment

[0036] In the present invention described above, the leader-pin holding spring 9 with elastic arm portions 9b, 9b is formed from Steel Use Stainless (SUS) material (e.g., SUS304), and the surface hardness Hv of the leader-pin holding portions 9c, 9c is increased to about 500 to 700 by chromium plating or nickel plating. On the other hand, the pin main body of the tape leader pin 5, equipped with the flange portions 5d, 5d, is formed from aluminum, and the surface hardness Hv is about 50 to 200. With this hardness difference between the tape leader pin 5 and the leader-pin holding spring 9, wear on the sliding surfaces of the leader-pin holding spring 9, which contact with the flange portions 5d, 5d of the tape leader pin 5, is prevented.

[0037] Thus, in the case where the surface hardness of the outer end portions of the elastic arm portions 9b, 9b of the leader-pin holding spring 9 is higher by far than that of the flange portions 5d, 5d of the tape leader pin 5, the outer end porti...

second embodiment

[0038] In the present invention, the sliding surfaces of the leader-pin holding portions 9c, 9c of a leading-pin holding spring 9 that contact with the tape leader pin 5 are roughened, for example, by barreling. It is preferable that the surface roughness of the sliding surfaces be in a range of 0.5 to 3.0 μm in terms of 10-point mean roughness. Note that roughening of the sliding surface may be performed not on the leader-pin holding spring 9 but on the tape leader pin 5, or may be performed on both the leader-pin holding spring 9 and the tape leader pin 5.

[0039] Thus, the sliding resistance between the sliding surfaces can be reduced by roughening at least either the sliding surface of the leader-pin holding spring 9 or the sliding surface of the tape leader pin 5. Since wear on the leader-pin holding spring 9 and / or the tape leader pin 5 is prevented, the state of the sliding surfaces of the leader-pin holding spring 9 and the tape leader pin 5 can be ideally maintained.

third embodiment

[0040] Furthermore, in the present invention, burrs due to punching are removed by performing a surface striking process on at least the sliding surfaces of the elastic arm portions 9b, 9b of the leader-pin holding spring 9.

[0041] Thus, in the third embodiment of the present invention, a surface striking process is performed on at least the sliding surfaces of the elastic arm portions 9b, 9b of the leader-pin holding spring 9, so there is no fear that the surface of the tape leader pin 5 will be scored by burrs due to punching. Thus, the third embodiment is capable of preventing an increase in the sliding resistance between the sliding surfaces of the leader-pin holding spring 9 and the tape leader pin 5.

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Abstract

A magnetic tape cartridge includes a cartridge case, a single tape reel, and a tape leader pin. The cartridge case has a tape leader opening in the side wall thereof. The tape reel with magnetic tape wound thereon is rotatably housed within said cartridge case. The tape leader pin is firmly attached to the leading end of said magnetic tape and is detachably held near the tape leader opening by a spring member. The surface hardness of the sliding surface of the spring member with respect to said tape leader pin is made higher than that of the tape leader pin to prevent an increase in the sliding resistance between the sliding surface of the tape leader pin and the sliding surface of a leader-pin holding spring.

Description

BACKGROUND OF THE INVENTION [0001] 1. Field of the Invention [0002] The present invention relates to a magnetic tape cartridge, in which a single tape reel with magnetic tape wound thereon is rotatably housed within a cartridge case, and in which a tape leader pin for pulling the magnetic tape out of the cartridge case is firmly attached to the leading end of the magnetic tape. [0003] 2. Description of the Related Art [0004] In magnetic tape cartridges, which are being used as storage media that are employed in external storage units for computers, etc., there is known a type where a single tape reel with magnetic tape wound thereon is rotatably housed within a cartridge case. This magnetic tape is employed to archive data for computers, etc. Since important information has been stored, the magnetic cartridge is constructed so that problems, such as tape jamming, etc., do not occur and that the magnetic tape is not pulled out of the cartridge case inadvertently. [0005] The magnetic ...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): G11B23/107G11B23/26
CPCG11B23/26G11B23/107
Inventor ISHIHARA, YUSUKESHIGA, HIDEAKITAKAHASHI, DAISUKE
Owner FUJIFILM HLDG CORP