US4911301A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Laminated case for magnetic disk and method of manufacturing same
Assignee: DCTEQ
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Filing: 1989-01-17
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Granted: 1990-03-27
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Expires: 2009-01-17
Abstract
Abstract A laminated case for a magnetic disk having a pair of outer laminae and a spacer lamina sandwiched therebetween. The spacer lamina adds rigidity to the laminated case and controls the height of a cavity in which the magnetic disk is located. A liner for wiping the disk is attached to each of the outer laminae. The liner has a free hanging section which provides the wiping action. The three laminae are ultrasonically welded together by a method which employs a fixture and an ultrasonic welding horn. The method permits the magnetic disk to be tested and discarded without sacrificing the laminated case.
Inventors
- 👤 Harry N. Dieffenbach
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 10:36
CPC Classifications
G; G11; G11B; G11B23/00; G11B23/50; G11B23/505; G11B23/02; G11B23/03; G11B23/0301; G11B23/0313; G11B23/0326
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
338 words
A laminated case for a magnetic disk comprising: a first outer lamina having a spindle hole that extends perpendicularly through the lamina; a second outer lamina that is parallel with the first outer lamina, each of the first and second outer lamina having a head access slot that extends perpendicularly therethrough and the first and second laminae having similar perimetrical configurations to provide uniform edges on the case; a spacer lamina interposed between the first outer lamina and the second outer lamina, the spacer lamina having a cavity extending perpendicularly therethrough for receiving a magnetic disk in a common plane with the spacer lamina which has a thickness that defines the depth of the cavity; at least one ultrasonic bonding region for bonding the laminae together to form the case; a first liner having a thickness in the approximate range of 0.012 and 0.016 inches affixed to the first outer lamina along a first ultrasonic welding pattern, said first ultrasonic welding pattern functioning to bond a first section of the first liner to the first outer lamina with said first section being in a plane substantially co-planar to the first outer lamina and to provide a hinge area from which a second section of the first liner can hang at an angle relative to said plane, said second section of the first liner having a free end which is not bonded to the first outer lamina and the edge of the free end projects axially being capable of contacting a magnetic disk; and a second liner having a thickness in the approximate range of 0.012 to 0.016 inches affixed to the second outer lamina along a second ultrasonic welding pattern, said second ultrasonic welding pattern functioning to bond a first section of the second liner to the second outer lamina and to provide a hinge area from which a second section of the second liner can hang, and said second section of the second liner having a free end which is not bonded to the second outer lamina.
Claim 2
Dependent Claim
338 words
A laminated case for a magnetic disk comprising: a first outer lamina having a spindle hole that extends perpendicularly through the lamina; a second outer lamina that is parallel with the first outer lamina, each of the first and second outer lamina having a head access slot that extends perpendicularly therethrough and the first and second laminae having similar perimetrical configurations to provide uniform edges on the case; a spacer lamina interposed between the first outer lamina and the second outer lamina, the spacer lamina having a cavity extending perpendicularly therethrough for receiving a magnetic disk in a common plane with the spacer lamina which has a thickness that defines the depth of the cavity; at least one ultrasonic bonding region for bonding the laminae together to form the case; a first liner having a thickness in the approximate range of 0.012 and 0.016 inches affixed to the first outer lamina along a first ultrasonic welding pattern, said first ultrasonic welding pattern functioning to bond a first section of the first liner to the first outer lamina with said first section being in a plane substantially co-planar to the first outer lamina and to provide a hinge area from which a second section of the first liner can hang at an angle relative to said plane, said second section of the first liner having a free end which is not bonded to the first outer lamina and the edge of the free end projects axially being capable of contacting a magnetic disk; and a second liner having a thickness in the approximate range of 0.012 to 0.016 inches affixed to the second outer lamina along a second ultrasonic welding pattern, said second ultrasonic welding pattern functioning to bond a first section of the second liner to the second outer lamina and to provide a hinge area from which a second section of the second liner can hang, and said second section of the second liner having a free end which is not bonded to the second outer lamina.
Claim 3
Dependent Claim
22 words
The laminated case of claim 1 wherein, the first and second outer laminae and the spacer lamina are made of plastic material.
Claim 4
Dependent Claim
250 words
A laminated case for a magnetic disk comprising: a first outer lamina having a spindle hole that extends perpendicularly through the lamina; a second outer lamina that is parallel with the first outer lamina, each of the first and second outer lamina having a head access slot that extends perpendicularly therethrough and the first and second laminae having similar perimetrical configurations to provide uniform edges on the case; a spacer lamina interposed between the first outer lamina and the second outer lamina, the spacer lamina having a cavity extending perpendicularly therethrough for receiving a magnetic disk in a common plane with the spacer lamina which has a thickness that defines the depth of the cavity; at least one ultrasonic bonding region for bonding the laminae together to form the case; a first liner affixed to the first outer lamina along a first ultrasonic welding pattern, said first ultrasonic welding pattern functioning to bond a first section of the first liner to the first outer lamina with said first section being in a plane substantially co-planar to the first outer lamina and to provide a hinge area from which a second section of the first liner can hang at an angle relative to said plane, said second section of the first liner having a free end which is not bonded to the first outer lamina and the edge of the free end projects axially being capable of contacting a magnetic disk; and a second liner affixed to the second outer lamina.
Claim 5
Dependent Claim
250 words
A laminated case for a magnetic disk comprising: a first outer lamina having a spindle hole that extends perpendicularly through the lamina; a second outer lamina that is parallel with the first outer lamina, each of the first and second outer lamina having a head access slot that extends perpendicularly therethrough and the first and second laminae having similar perimetrical configurations to provide uniform edges on the case; a spacer lamina interposed between the first outer lamina and the second outer lamina, the spacer lamina having a cavity extending perpendicularly therethrough for receiving a magnetic disk in a common plane with the spacer lamina which has a thickness that defines the depth of the cavity; at least one ultrasonic bonding region for bonding the laminae together to form the case; a first liner affixed to the first outer lamina along a first ultrasonic welding pattern, said first ultrasonic welding pattern functioning to bond a first section of the first liner to the first outer lamina with said first section being in a plane substantially co-planar to the first outer lamina and to provide a hinge area from which a second section of the first liner can hang at an angle relative to said plane, said second section of the first liner having a free end which is not bonded to the first outer lamina and the edge of the free end projects axially being capable of contacting a magnetic disk; and a second liner affixed to the second outer lamina.
Claim 6
Dependent Claim
128 words
The laminated case of claim 3 wherein, the second liner is affixed to the second outer lamina along a second ultrasonic welding pattern, said second ultrasonic welding pattern functioning to bond a first section of the second liner to the second outer lamina with said first section of the second liner being in a plane substantially co-planar to the second outer lamina and to provide a hinge area from which a second section of the second liner can hang at an angle relative to said plane of said second outer lamina, and said second section of the second liner having a free end which is not bonded to the second outer lamina and the edge of the free end projects axially being capable of contacting said magnetic disk.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-03-26 | 1993-09-25 | 1994-03-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-03-26 | 1997-09-25 | 1998-03-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-03-26 | 2001-09-25 | 2002-03-27 | $7700.00 | Window Closed / Lapsed |