Patent US5645471A successfully refreshed from Google Patents.
US5645471A
Expired / Lapsed
US
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Method of texturing a substrate using an abrasive article having multiple abrasive natures
Assignee: 3M Co
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Filing: 1995-08-11
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Granted: 1997-07-08
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Expires: 2015-08-11
Abstract
Abstract The present invention relates to a method of texturing a rigid disk for magnetic media applications, using a coated abrasive article comprising a backing having at least two regions of abrasive coating bonded to one side of the backing. The at least two regions of abrasive coating have different abrasive natures.
Inventors
- 👤 Darlene N. Strecker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 14:03
CPC Classifications
B; B24; B24B; B24B21/00; B24B21/16; B24D; B24D11/00; B24D11/04; G; G11; G11B; G11B5/00; G11B5/84; G11B5/8404
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
116 words
A method of texturing a surface of a rigid disk to simultaneously impart a first area on said surface having a first surface finish and a second area on said surface having a second surface finish, said method comprising the steps of: (a) contacting said surface with a coated abrasive article comprising a first region having a first abrasive nature and a second region having a second abrasive nature, both regions bonded to a backing, said first abrasive nature being different than said second abrasive nature; and (b) moving at least one of said coated abrasive article or said rigid disk with respect to each other under conditions to impart said first and second surface finishes.
Claim 2
Independent Claim
116 words
A method of texturing a surface of a rigid disk to simultaneously impart a first area on said surface having a first surface finish and a second area on said surface having a second surface finish, said method comprising the steps of: (a) contacting said surface with a coated abrasive article comprising a first region having a first abrasive nature and a second region having a second abrasive nature, both regions bonded to a backing, said first abrasive nature being different than said second abrasive nature; and (b) moving at least one of said coated abrasive article or said rigid disk with respect to each other under conditions to impart said first and second surface finishes.
Claim 3
Dependent Claim
16 words
A method according to claim 1, wherein said rigid disk is a metal coated rigid disk.
Claim 4
Dependent Claim
16 words
A method according to claim 1, wherein said rigid disk is glass or ceramic rigid disk.
Claim 5
Dependent Claim
24 words
A method according to claim 1, wherein said first region has an average abrasive particle size at least 10% larger than said second region.
Claim 6
Dependent Claim
24 words
A method according to claim 4, wherein said first region has an average abrasive particle size at least 25% larger than said second region.
Claim 7
Dependent Claim
18 words
A method according to claim 1, wherein said coated abrasive article is a tape having an extended length.
Claim 8
Dependent Claim
19 words
A method according to claim 6, wherein said first region and said second region are parallel along said length.
Claim 9
Dependent Claim
15 words
A method according to claim 1, wherein said contacting is accomplished in a liquid environment.
Claim 10
Dependent Claim
32 words
A method according to claim 1, wherein said moving comprises spinning said rigid disk to provide a direction of travel while said coated abrasive article is perpendicular to said direction of travel.
Claim 11
Dependent Claim
22 words
A method according to claim 9, wherein said moving further comprises oscillating said coated abrasive article perpendicular to said direction of travel.
Claim 12
Dependent Claim
15 words
A method according to claim 9, wherein said contacting imparts circumferential scratches in said surface.
Claim 13
Dependent Claim
19 words
A method according to claim 11, wherein said circumferential scratches have an Ra between about 20 and 60 Angstroms.
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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) | 2000-07-07 | 2001-01-06 | 2001-07-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2004-07-07 | 2005-01-06 | 2005-07-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2008-07-07 | 2009-01-06 | 2009-07-08 | $7700.00 | Window Closed / Lapsed |