JPS60212884A - Floppy disc cassette - Google Patents

Abstract

PURPOSE:To prevent the generation of nap or fiber flocks and to improve reliability by forming a cleaning liner of which part close to a cut end part is thermally pressed on the inside of the cassette and fixing the liner partially to the inside of the cassette. CONSTITUTION:A cleaning liner material before punching to a prescribed shape and after punching and the plane of the cleaning liner are shown in the drawing. At first, a heat pressing part 4 is formed on the liner material 2'' in accordance with a shape to be cut off. The heat pressing treatment is executed with about 2-10mm. width on both inside and outside of a proposed punching line 5. The treated liner material 2'' punched along the proposed punching line 5. Since the liner 3 is thermally pressed near the cut part, respective fibers are compressed, melted and united and nap is not generated even if the liner 3 is cut off. The liner 3 is partially fixed to the inside of a cassette by heat welding or the like.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in a cassette for storing floppy disks, and more particularly to a cassette that prevents short fibers from falling off from a cleaning liner such as a nonwoven fabric arranged on the inner surface of the cassette.

A floppy disk cassette has a structure as shown in FIG.

On the inner surface of each shell, a cleaning liner 2 made of non-woven fabric or the like is punched into a predetermined shape. ! is placed in order to protect and clean the discs stored there. This liner 21i is partially fixed to the inner surface of the shell /, /' by spot-shaped, linear, etc. heat-sealed parts. After storing the floppy disk 3, the upper and lower shells /, /'
A floppy disk cassette is obtained by fusing the two.

However, conventionally, when the cleaning liner λ, 2' is punched into a predetermined shape, short fiber fuzz is generated from the cut portion of the liner, and this fuzz separates from the liner when the cassette is used, causing dropouts. There were drawbacks.

The present invention effectively solves the above-mentioned drawbacks through a simple treatment, and its feature lies in that the vicinity of the cut portion of the cleaning liner is preheated and suppressed to prevent the generation of fluff and fiber debris.

The present invention will be explained below based on the drawings. 2 and 3 are diagrams for explaining the present invention, in which FIG. 2 is a plan view of the cleaning liner material before punching into a predetermined shape, and FIG. 3 is a plan view of the cleaning liner material after punching into a predetermined shape. It is a diagram.

First, a heated and pressed portion q corresponding to the shape to be cut is formed on the liner material 2''.

This heat suppression treatment is performed over a width of, for example, about 2 to ion across the planned punching line j.

Processing conditions vary depending on the material of the liner material 2″, but
Normally iso~3θθC is 01.2~. It is appropriate to do this for about 2 seconds. Pressure varies depending on temperature etc.1.
A strength of 20 to 20 kg/crd is sufficient.

In addition to heat pressing, the heat suppression treatment is performed using liner material 2.
It is also possible to use an ultrasonic heating press or a high frequency heating press depending on the material of the ``.

Next, the treated liner material 2'' is punched out along the planned punching line to obtain a liner 3 having a predetermined shape as shown in FIG.

This liner 3 has been heat-suppressed near the cut portion, so the fibers are compressed and fused together and integrated, and even when cut, short fiber fuzz does not occur, and when the cassette is in use, The fibers do not come loose at all.

This liner 3 is inserted into the cassette /, /' in the same manner as before.
It is partially spotted (for example, using a spot knoll or a linear/-knob) on the inner surface of the material by heat fusion or the like.

Example As a liner material, a 0.2myaD non-woven material made of 75% polypropylene, 25% polypropylene, and a thickness of 0.2myaD was used.
The amount of chips was compared between the heated and pressed material and the sinusoidal material.

The liner material (2) was heat-pressed over a width smM under the conditions of /90C, 1 second, jOkνd, and the heat-pressed part was punched out using a Thomson method to give an outer diameter of ♂7 mm.
A liner as shown in FIG. 3 with an inner diameter of 36TLjT was obtained. On the other hand, as a comparatively small j, a liner material that was not subjected to the force Q heat pressing treatment was punched out in the same manner as above.

Then, the end of the liner was vibrated and suctioned for 5 seconds to collect chips, and the number of chips per 7 liners was counted by length. The results are shown in Table 1.

As is clear from the examples in Table 1 and above, the cassette of the present invention does not generate any fiber waste, and even after long-term use, no dropouts due to fiber waste occur, making it a highly reliable floppy disk cassette. is obtained.

[Brief explanation of drawings]

Figure 1 is an exploded perspective view of a floppy disk cassette;
FIG. 2 is a plan view showing the state of the liner in the cassette of the present invention before punching, and FIG. 3 is a plan view showing the state after punching. /l/′・・・・・・Cassette Sherco!・・・
・・・・・・Cleaning liner 3-・Floppy disk q Pressure l] Heat pressing treatment Figure 2 夙37

Claims (1)

[Claims] A floppy disk cassette characterized in that a cleaning liner whose portion near the cut end is subjected to heat suppression treatment is disposed on the inner surface of the cassette, and the liner is partially fixed to the inner surface of the cassette.