Flexible disk magnetic recording device

Claim 2

In a flexible disk magnetic storage device including, a flexible magnetic storage disk, backer plate means to stabilize said disk, means to rotate said disk to form a surface of revolution stably supported on a first thin film of fluid between said backer plate means and said disk, the improvement comprising: read-write transducer means including a read-write gap and first and second adjustable means to allow at least first and second degrees of adjustment of said transducer means, said first adjustable means comprising vertical adjusting means to adjust said transducer means so that the high point on said transducer means extends from said backer plate a distance between approximately 1.5 and 4 mils so as to protrude from said backer plate through said first thin film of fluid a distance greater than the distance between said backer plate and said disk undisturbed on said first thin film of fluid so as to stably form between said transducer means and said disk a second thin film of fluid thinner than said first thin film of fluid, and said second adjustable means comprising rotational adjusting means to rotate said transducer means so that said read-write gap is rotationally displaced from said vertical between 0* and 2* in opposition to the direction of rotation of said disk so as to position said gap within a region of minimum separation between said gap and said disk in accordance with the extent of said protrusion.

Claim 3

The device as set forth in claim 1 wherein said fluid is air.

Claim 4

In a non-contact magnetic recording device including, a pliant record disk having a magnetizable surface, at least the outer portion of said disk having small internal stresses thereby being normally limp and pliable, means to rotate said pliant record disk at a pre-selected velocity and backer plate means mounted to stabilize rotation of said disk by forming said disk into a surface of revolution which rotates on a thin film of air entering between said backer plate and said disk with each element of at least the outer periphery of said portion substantially lying in a common plane of rotation, said improvement comprising: read-write transducer means including a read-write gap and first and second adjustable means to allow at least first and second degrees of adjustment of said transducer means, said first adjustable means comprising vertical adjusting means to adjust said transducer means so that the high point on said transducer means extends from said backer plate means a distance between approximately 1.5 and 4 mils so as to protrude through said thin film of air a distance greater than the distance between said backer plate means and the said magnetizable surface of said disk undisturbed on said thin film of air to thereby stably establish a micro-inch separation between the said magnetizable surface of said disk and said transducer means for reading and writing information, and said second adjustable means comprising rotational adjusting means to rotate said transducer means so that said read-write gap is rotationally displaced from said vertical between 0* and 2* in opposition to the direction of rotation of said disk so as to thereby position said into a region of minimum separation between said gap and said disk, in accordance with the extent of said protrusion.

Claim 5

In a non-contact magnetic recording device including, a pliant record disk having a magnetizable surface, at least the outer portion of said disk having small internal stresses thereby being normally limp and pliable, means to rotate said pliant record disk at a pre-selected velocity and backer plate means mounted to stabilize rotation of said disk by forming said disk into a surface of revolution which rotates on a thin film of air entering between said backer plate and said disk with each element of at least the outer periphery of said portion substantially lying in a common plane of rotation, said improvement comprising: read-write transducer means including a read-write gap and first and second adjustable means to allow at least first and second degrees of adjustment of said transducer means, said first adjustable means comprising vertical adjusting means to adjust said transducer means so that the high point on said transducer means extends from said backer plate means a distance between approximately 1.5 and 4 mils so as to protrude through said thin film of air a distance greater than the distance between said backer plate means and the said magnetizable surface of said disk undisturbed on said thin film of air to thereby stably establish a micro-inch separation between the said magnetizable surface of said disk and said transducer means for reading and writing information, and said second adjustable means comprising rotational adjusting means to rotate said transducer means so that said read-write gap is rotationally displaced from said vertical between 0* and 2* in opposition to the direction of rotation of said disk so as to thereby position said into a region of minimum separation between said gap and said disk, in accordance with the extent of said protrusion.

Claim 6

The device as set forth in claim 3 wherein said thin film of air enters between said backer plate and said disk via orifice means in said disk.

Claim 7

The device as set forth in claim 3 wherein said thin film of air enters between said backer plate and said disk via orifice means in said backer plate means.