JPS58177552A - Magnetic tape cartridge - Google Patents

Abstract

PURPOSE:To reduce the sticking force of an electrified magnetic tape by making the internal wall of a magnetic tape cartridge finely rugged. CONSTITUTION:Once operation starts, compressed air is blown into the cartridge 1 and a reel 2 starts rotating clockwise. In a normal state, a tape tip floats as it is by the air flow and is sent out from a cartridge exit 3 into a magnetic tape device along the internal wall of the cartridge. When, however, the tape tip is electrified, the tip sticks to the internal wall to form an abnormal loop and the operation is completed without sending the tape tip out from the exit 3. For this purpose, the entire circumference of the internal wall is made finely rugged as shown in a figure. The internal wall is finely rugged, so the tape tip is not caught normally and this is effective to an electrified tape.

Description

[Detailed Description of the Invention] Object of the Invention The present invention relates to a magnetic tape cartridge for automatic threading and recording,
In particular, the present invention relates to a magnetic tape cartridge that enables good threading and threading even when using a magnetic tape charged with static electricity.

Prior Art A conventional magnetic tape cartridge has a plurality of holes in its smooth inner wall through which air is blown out, and the air flow blown out from these holes lifts the tape tip, causing the tape tip to float along the inner wall of the IJ edge. It is structured to be introduced to the exit. These work well when using normal tapes, but the tip of the magnetic tape is often electrostatically charged, and in this case it will not float away due to air flow, and the inner wall is smooth, so the tape tip will stick to it. As a result, the leading end of the tape is not introduced to the outlet, creating an abnormal loop within the cartridge, causing damage.

OBJECTS OF THE INVENTION The object of the present invention is to provide a magnetic tape cartridge that enables stable auto-threading even when using electrostatically charged magnetic tape.

General Description of the Invention It is well known that when plastics are rubbed together or when already charged plastics are brought close to each other, they stick to each other, but when one side has an uneven surface, this adhesion force increases. It is weakened by a large cloth. The inner wall of the magnetic tape cartridge, which is a plastic molded product, is heavily textured to reduce the adhesion of the charged magnetic tape, making it easier to introduce the leading end of the tape to the outlet.

Examples of the invention Embodiments of the present invention will be described below with reference to FIG.

During auto-threading, the magnetic tape cartridge 1 is held on the magnetic tape device side so as not to interfere with the magnetic tape reel 2.

When the operation starts, compressed air is blown into the cartridge 1, and the reel 2 starts rotating clockwise. Under normal conditions, the leading edge of the tape is floated as it is by the air flow and is fed into the magnetic tape device from the cartridge outlet 5 along the inner wall of the cartridge. However, if the leading end of the tape is electrically charged, the leading end will adhere to the inner wall and form an abnormal loop as shown by the broken line in FIG. 1, resulting in abnormal termination without a fist being sent out from the outlet g. FIG. 2 shows an embodiment of the invention. As shown in the figure, the entire inner wall of the cartridge is machined with fine irregularities. Since the unevenness is fine, the tip of the tape does not get caught under normal conditions, and is also effective for the charged tape of the present invention.

Effects of the Invention According to the present invention, even when a charged tape is used, the leading end of the tape can be fed into the device from the cartridge outlet, which can greatly contribute to improving the success rate of auto-threading operations, and can further reduce media damage such as tape bending. This improves the reliability of magnetic tape devices and extends the lifespan of the media.

[Brief explanation of drawings]

FIG. 1 is a plan view showing the relationship between the cartridge and tape reel and the movement of the leading edge of the tape during auto-threading according to an embodiment of the present invention, and FIG. 2 is a detailed cross-sectional view of section A in FIG. 1. DESCRIPTION OF SYMBOLS 1... Magnetic tape cartridge, 2... Magnetic tape reel, 5... Exit of the tape leading end provided in the magnetic tape cartridge. First offender

Claims (1)

[Claims] t. In a magnetic tape cartridge that has an auto-threading function and is compatible with a magnetic tape device for computer use, the tape is designed to add a fine grain-shaped uneven pattern to the inner wall where the tape is guided by the air flow during auto-threading. This magnetic tape cartridge is characterized by improving the success rate of auto-threading by making it difficult for the inner wall to adhere to the inner wall due to static electricity, even if the magnetic tape is charged with static electricity at the tip.