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Shutter Mechanism for Flexible Disk Cartridge

IP.com Disclosure Number: IPCOM000042613D
Original Publication Date: 1984-Jun-01
Included in the Prior Art Database: 2005-Feb-04
Document File: 2 page(s) / 59K

Publishing Venue

IBM

Related People

Carey, PD: AUTHOR [+4]

Abstract

A flexible disk cartridge has a pair of opposed plane walls in each of which is a head access slot. The cartridge is provided with a double shutter plate, which locates in relieved areas of the outer faces of the walls surrounding the access slots. The shutter plate is mounted on a crank which is pivoted near to one corner of the cartridge. The shutter is positively latched in its open or closed position by the action of a restoring spring and is opened against the action of the spring by the insertion of the cartridge in the drive. Fig. 1 is an exploded view of the cartridge and shutter mechanism, excluding the disk. The disk would be enclosed between the two walls 10 and 11 of the cartridge and centered on hub access holes 12 and 13.

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Shutter Mechanism for Flexible Disk Cartridge

A flexible disk cartridge has a pair of opposed plane walls in each of which is a head access slot. The cartridge is provided with a double shutter plate, which locates in relieved areas of the outer faces of the walls surrounding the access slots. The shutter plate is mounted on a crank which is pivoted near to one corner of the cartridge. The shutter is positively latched in its open or closed position by the action of a restoring spring and is opened against the action of the spring by the insertion of the cartridge in the drive. Fig. 1 is an exploded view of the cartridge and shutter mechanism, excluding the disk. The disk would be enclosed between the two walls 10 and 11 of the cartridge and centered on hub access holes 12 and 13. Arcuate slots 14 and 15 in the walls permit access to the disk by magnetic heads (not shown). Surrounding each slot 14 and 15 on the outer face of each wall is a relieved area, such as 16. The shape of these relieved areas is complementary to the shape of each plate 18, 19 of a double shutter generally indicated at 20. When the cartridge is not in use, the shutter plates 18 and 19 locate in the relieved areas to cover the access slots 14 and 15. The shutter also includes a crank 21 which is pivotally mounted by means of a hole 22 on a pivot 23 in one corner of the cartridge. The shutter is opened and closed by pivotal movement about pivot 22. The shutter 20 is positively latched in both...