US3935924A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vibratory material of paper pulp and carbon fibers
Assignee: Toray Industries Inc
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Filing: 1973-12-20
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Granted: 1976-02-03
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Expires: 1993-12-20
Abstract
Abstract A vibratory plate of pulp and chopped carbon fibers mixed uniformly in the paper. The pulp is thoroughly beaten to a degree not higher than 300 cc. of Canadian standard freeness.
Inventors
- 👤 Shozo Nagao
- 👤 Naoyuki Mitani
- 👤 Michinobu Ikuta
- 👤 Kenji Fujisawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 20:16
CPC Classifications
G; G10; G10K; G10K13/00; D; D21; D21H; D21H13/00; D21H13/36; D21H13/46; D21H13/50; H; H04; H04R; H04R7/00; H04R7/02
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
39 words
A vibratory plate comprising a substantially uniform mixture of paper pulp having a maximum beating degree of about 300 cc. of Canadian standard freeness and carbon fibers having a Young's modulus of at least about 8000 kg/mm 2 .
Claim 2
Dependent Claim
39 words
A vibratory plate comprising a substantially uniform mixture of paper pulp having a maximum beating degree of about 300 cc. of Canadian standard freeness and carbon fibers having a Young's modulus of at least about 8000 kg/mm 2 .
Claim 3
Dependent Claim
33 words
The vibratory plate defined in claim 1, wherein the weight percentage of carbon fibers, based upon total weight of carbon fibers plus pulp, is in the range of about 3% to about 75%.
Claim 4
Dependent Claim
15 words
The vibratory plate defined in claim 1, wherein said percentage is about 4 - 50.
Claim 5
Dependent Claim
15 words
The vibratory plate defined in claim 1, wherein said percentage is about 5 - 35.
Claim 6
Dependent Claim
28 words
A vibratory plate according to claim 2 for an audio electrical instrument, wherein said carbon fibers have a Young's modulus of at least about 15,000 kg/mm 2 .
Claim 7
Dependent Claim
20 words
The vibratory plate according to claim 2, wherein said carbon fibers have an average diameter of about 1to 20 μ.
Claim 8
Dependent Claim
21 words
The vibratory plate according to claim 2, wherein said carbon fibers have an average length of about 0.5 to 20 mm.
Claim 9
Dependent Claim
15 words
The vibratory plate according to claim 2, wherein said carbon fibers have a roughened surface.
Claim 10
Dependent Claim
12 words
The vibratory plate defined in claim 2, wherein said surface is oxidized.
Claim 11
Dependent Claim
16 words
The vibratory plate according to claim 2, wherein said vibratory plate is shaped as a cone.
Claim 12
Dependent Claim
16 words
The vibratory plate according to claim 2, wherein said vibratory plate is shaped as a dome.
Claim 13
Dependent Claim
62 words
A high fidelity speaker sound reproducing element comprising a shaped vibratory plate consisting essentially of a. about 25% to about 97% by weight of paper pulp having a maximum beating degree of about 300 cc. of Canadian standard freeness, and b. about 3% to about 75% by weight of carbon fibers having a minimum Young's modulus of about 8000 kg/mm 2 .
Claim 14
Dependent Claim
62 words
A high fidelity speaker sound reproducing element comprising a shaped vibratory plate consisting essentially of a. about 25% to about 97% by weight of paper pulp having a maximum beating degree of about 300 cc. of Canadian standard freeness, and b. about 3% to about 75% by weight of carbon fibers having a minimum Young's modulus of about 8000 kg/mm 2 .
Claim 15
Dependent Claim
50 words
The element defined in claim 12, wherein the carbon fibers have an average filament diameter of about 1 - 20 microns and an average filament length of about 5 - 20 millimeters, and wherein said Young's modulus is in the range of about 8000 to about 50,000 Kg/mm 2 .
Claim 16
Dependent Claim
35 words
A high fidelity speaker having a frame, a shaped speaker vibratory element, and a magnetic means for vibrating said element to convert electrical impulses to audio responses, said element comprising the element of claim 12.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-02-02 | 1979-08-04 | 1980-02-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-02-02 | 1983-08-04 | 1984-02-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-02-02 | 1987-08-04 | 1988-02-03 | $7700.00 | Window Closed / Lapsed |