US3943666A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for burnishing flexible recording material
Assignee: Dysan Corp
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Filing: 1974-07-31
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Granted: 1976-03-16
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Expires: 1994-07-31
Abstract
Abstract A method and apparatus for treating the recording layer of flexible recording elements to remove protruding agglomerated particles formed during the fabrication process and to provide an extremely smooth surface finish on the order of 1.8AA or less. Several embodiments are disclosed for treating both annular recording discs and roll type recording media. The method comprises burnishing the recording layer surface with a hard smooth abrasive member while supporting the flexible recording element on a resilient backing surface and observing key parameters.
Inventors
- 👤 C. Norman Dion
- 👤 Tom Y. Idemoto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 06:36
CPC Classifications
B; B24; B24B; B24B7/00; B24B7/04; B24B7/10; B24B7/12; B24B7/16
Claims Analysis
Total Claims: 28
Claim 1
Independent Claim
132 words
A method of treating the recording surface of a flexible recording element to remove protruding agglomerates and improve the surface smoothness, said method comprising the steps of: a. supporting said flexible recording element on a substantially resilient compressible support surface; b. translating said recording surface of said recording element past an abrading region at a first rate; and c. abrading said recording surface during translation thereof past said abrading region for a predetermined period with an abrasive element having substantially less resiliency than said compressible surface by moving the surface of said abrasive element past said abrading region at a second rate different from said first rate while pressing said recording surface against said support surface with said abrasive element with sufficient force to compress said support surface at said abrading region.
Claim 2
Independent Claim
132 words
A method of treating the recording surface of a flexible recording element to remove protruding agglomerates and improve the surface smoothness, said method comprising the steps of: a. supporting said flexible recording element on a substantially resilient compressible support surface; b. translating said recording surface of said recording element past an abrading region at a first rate; and c. abrading said recording surface during translation thereof past said abrading region for a predetermined period with an abrasive element having substantially less resiliency than said compressible surface by moving the surface of said abrasive element past said abrading region at a second rate different from said first rate while pressing said recording surface against said support surface with said abrasive element with sufficient force to compress said support surface at said abrading region.
Claim 3
Dependent Claim
40 words
The method of claim 1 wherein said first rate is in the range of from about 4 to about 28 inches per second and said second rate is in the range from about 30 to about 95 inches per second.
Claim 4
Dependent Claim
32 words
The method of claim 2 wherein said first rate is in the range from about 6 to about 12 inches per second and said second rate is about 70 inches per second.
Claim 5
Dependent Claim
27 words
The method of claim 1 wherein the force between said abrasive element and said support surface is in the range from about 6.5 to about 11 pounds.
Claim 6
Dependent Claim
12 words
The method of claim 4 wherein said force is about 8.8 pounds.
Claim 7
Dependent Claim
20 words
The method of claim 1 wherein said predetermined period is in the range from about 12 to about 22 seconds.
Claim 8
Dependent Claim
12 words
The method of claim 6 wherein said period is about 17 seconds.
Claim 9
Independent Claim
132 words
An apparatus for treating the recording surface of a recording element to remove protruding agglomerates and improve surface smoothness, said recording element having a flexible substrate with front and back surfaces, said apparatus comprising: a resilient compressible backing means for providing a substantially resislient yielding support surface for one of said surfaces of said flexible recording element; an abrasive element adapted to be placed in surface contact with said recording surface at an abrading region for pressing said recording element against said resilient backing means with sufficient force to compress said backing means at said abrading region, said abrasive element having substantially less resiliency than said backing means; means for providing relative movement between said abrasive element and said recording surface and; means for providing said force to compress said backing means.
Claim 10
Independent Claim
132 words
An apparatus for treating the recording surface of a recording element to remove protruding agglomerates and improve surface smoothness, said recording element having a flexible substrate with front and back surfaces, said apparatus comprising: a resilient compressible backing means for providing a substantially resislient yielding support surface for one of said surfaces of said flexible recording element; an abrasive element adapted to be placed in surface contact with said recording surface at an abrading region for pressing said recording element against said resilient backing means with sufficient force to compress said backing means at said abrading region, said abrasive element having substantially less resiliency than said backing means; means for providing relative movement between said abrasive element and said recording surface and; means for providing said force to compress said backing means.
Claim 11
Dependent Claim
26 words
The apparatus of claim 8 wherein said resilient backing means has a hardness and a resiliency in the range from 40-70 durometer and 40-70 percent, respectively.
Claim 12
Dependent Claim
18 words
The apparatus of claim 9 wherein said hardness and resiliency are about 50 durometer and 50 percent, respectively.
Claim 13
Dependent Claim
25 words
The apparatus of claim 8 wherein said resilient backing means is provided with a surface finish in the range from about 50 to about 80AA.
Claim 14
Dependent Claim
12 words
The apparatus of claim 11 wherein said surface finish is about 63AA.
Claim 15
Dependent Claim
26 words
The apparatus of claim 8 wherein said abrasive element comprises a ceramic cylinder having a surface finish in the range from about 30 to about 40AA.
Claim 16
Dependent Claim
15 words
The apparatus of claim 13 wherein said surface finish of said cylinder is about 35AA.
Claim 17
Dependent Claim
13 words
The apparatus of claim 13 wherein said cylinder is a right circular cylinder.
Claim 18
Dependent Claim
17 words
The apparatus of claim 13 wherein said cylinder is a disc having an abrasive free end surface.
Claim 19
Dependent Claim
22 words
The apparatus of claim 16 wherein said abrasive surface is provided with a plurality of radially extending alternate land and groove portions.
Claim 20
Dependent Claim
12 words
The apparatus of claim 13 wherein said cylinder is a truncated cone.
Claim 21
Dependent Claim
22 words
The apparatus of claim 9 wherein said relative movement means comprises means for rotating said abrasive element at a first predetermined speed.
Claim 22
Dependent Claim
23 words
The apparatus of claim 19 wherein said first predetrmined speed is in the range from about 600 to about 1200 revolutions per minute.
Claim 23
Dependent Claim
16 words
The apparatus of claim 20 wherein said first predetermined speed is about 900 revolutions per minute.
Claim 24
Dependent Claim
24 words
The apparatus of claim 19 wherein said relative movement means further includes means for rotating said resilient backing means at a second predetermined speed.
Claim 25
Dependent Claim
23 words
The apparatus of claim 22 wherein said second predetermined speed is in the range from about 20 to about 60 revolutions per minute.
Claim 26
Dependent Claim
14 words
The apparatus of claim 23 wherein said speed is about 30 revolutions per minute.
Claim 27
Dependent Claim
30 words
The apparatus of claim 9 wherein said flexible recording element is pressed against said resilient backing means with a force in the range from about 6.6 to about 11.0 pounds.
Claim 28
Dependent Claim
12 words
The apparatus of claim 25 wherein said force is about 8.8 pounds.
References Cited (Backward Citations)
US1076862A
Cited
US2590325A
Cited
US2867057A
Cited
US3284962A
Cited
US3398011A
Cited
US3364630A
Cited
US3343306A
Cited
US3486274A
Cited
US3481083A
Cited
US3676216A
Cited
US3601932A
Cited
US3599961A
Cited
US3818649A
Cited
US3839830A
Cited
US3863395A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-03-16 | 1979-09-15 | 1980-03-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-03-16 | 1983-09-15 | 1984-03-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-03-16 | 1987-09-15 | 1988-03-16 | $7700.00 | Window Closed / Lapsed |