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Ultrasonically Welded Diskette Cartridge

IP.com Disclosure Number: IPCOM000041577D
Original Publication Date: 1984-Feb-01
Included in the Prior Art Database: 2005-Feb-02
Document File: 2 page(s) / 58K

Publishing Venue

IBM

Related People

Rose, L: AUTHOR [+4]

Abstract

In ultrasonically welding the two plastic halves of a magnetic recording diskette jacket, the energy concentrating tabs, which are carried by one half, are surrounded by a fence-like wall, carried by the other half, such that debris which is generated by the welding operation is confined to the fenced-in area, and the debris therefore does not find its way into the diskette cavity wherein the floppy disk is confined. Fig. 1 is a top view of such a diskette, having top half 10 and bottom half 11, and showing a portion of the floppy magnetic recording disk 12 which is loosely contained wherein the jacket is formed by the two plastic halves. Fig. 2 shows the internal view of bottom half 11. This half contains four arcuate internal walls 13 which extend to meet the wall 14 which encircles the entire outer periphery of the diskette.

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Ultrasonically Welded Diskette Cartridge

In ultrasonically welding the two plastic halves of a magnetic recording diskette jacket, the energy concentrating tabs, which are carried by one half, are surrounded by a fence-like wall, carried by the other half, such that debris which is generated by the welding operation is confined to the fenced-in area, and the debris therefore does not find its way into the diskette cavity wherein the floppy disk is confined. Fig. 1 is a top view of such a diskette, having top half 10 and bottom half 11, and showing a portion of the floppy magnetic recording disk 12 which is loosely contained wherein the jacket is formed by the two plastic halves. Fig. 2 shows the internal view of bottom half 11. This half contains four arcuate internal walls 13 which extend to meet the wall 14 which encircles the entire outer periphery of the diskette. In this way, walls 13 and 14 enclose and seal the four areas 15 when the two halves are assembled together, as shown in Fig. 1. The four dotted areas 16 of Fig. 2 represent the four energy concentrating weld tabs carried by top half 10. The relationship between these weld tabs and walls 13 is shown in Fig. 3. As shown in this figure, prior to welding, each of the weld tabs 16 includes a pointed energy-concentrating tip 17. During ultrasonic welding, this tip becomes fluid, and effectively disappears as the two halves are welded together. Fig. 4 shows an alternate way of forming the fence around the ...