US4104436A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetic head cleaning article
Assignee: Fujifilm Holdings Corp
•
Filing: 1974-08-30
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Granted: 1978-08-01
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Expires: 1994-08-30
Abstract
Abstract A durable magnetic head cleaning article which can be used to achieve superior cleaning of a magnetic head, comprising a Japanese paper on a support, the Japanese paper being made of vegetable fibers having a fiber length of about 5 mm or longer and an average fiber diameter of about 10 μ to 40 μ.
Inventors
- 👤 Osamu Suzuki
- 👤 Masaki Ueda
- 👤 Akira Ishii
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 09:02
CPC Classifications
G; G11; G11B; G11B5/00; G11B5/41; Y; Y10; Y10S; Y10S428/00; Y10S428/90; Y10T; Y10T428/00; Y10T428/25; Y10T428/26; Y10T428/266; Y10T428/31504; Y10T428/31971; Y10T428/31993
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
50 words
An article for cleaning a magnetic head comprising a support having a Japanese paper laminated thereon, the Japanese paper consisting of the bast fibers of natural vegetable fibers having a fiber length of about 5 mm or longer and an average fiber diameter of about 10 μ to 40 μ.
Claim 2
Dependent Claim
50 words
An article for cleaning a magnetic head comprising a support having a Japanese paper laminated thereon, the Japanese paper consisting of the bast fibers of natural vegetable fibers having a fiber length of about 5 mm or longer and an average fiber diameter of about 10 μ to 40 μ.
Claim 3
Dependent Claim
68 words
An article for cleaning a magnetic head comprising a support having a Japanese paper laminated onto one surface and a backing layer comprising pigments or lubricants dispersed in a binder on the other surface, the Japanese paper consisting of the bast fibers of natural vegetable fibers having a fiber length of about 5 mm or longer and an average fiber diameter of about 10 μ to 40 μ.
Claim 4
Dependent Claim
68 words
An article for cleaning a magnetic head comprising a support having a Japanese paper laminated onto one surface and a backing layer comprising pigments or lubricants dispersed in a binder on the other surface, the Japanese paper consisting of the bast fibers of natural vegetable fibers having a fiber length of about 5 mm or longer and an average fiber diameter of about 10 μ to 40 μ.
Claim 5
Dependent Claim
20 words
The article as claimed in claim 1, wherein said support is a rigid polyester, cellulose triacetate or vinyl chloride film.
Claim 6
Dependent Claim
20 words
The article as claimed in claim 2, wherein said support is a rigid polyester, cellulose triacetate or vinyl chloride film.
Claim 7
Dependent Claim
15 words
The article as claimed in claim 3, wherein said support is a polyethylene terephthalate film.
Claim 8
Dependent Claim
15 words
The article as claimed in claim 4, wherein said support is a polyethylene terephthalate film.
Claim 9
Dependent Claim
30 words
The article as claimed in claim 2, wherein said pigments or lubricants of said backing layer are employed in a proportion of 1:1/3 to 1:4/3 by weight of said binder.
Claim 10
Dependent Claim
29 words
The article as claimed in claim 7, wherein said pigment or lubricant of said backing layer comprise particles having an average particle size of about 0.05 to 5 μ.
Claim 11
Dependent Claim
22 words
The article as claimed in claim 8, wherein the average particle size of said backing layer particles is 0.1 to 2 μ.
Claim 12
Dependent Claim
25 words
The article as claimed in claim 8, wherein said backing layer comprises particles of carbon black, graphite, carbon black-grafted polymer, tungsten disulfide or molybdenum disulfide.
Claim 13
Dependent Claim
25 words
The article as claimed in claim 9, wherein said backing layer comprises particles of carbon black, graphite, carbon black-grafted polymer, tungsten disulfide or molybdenum disulfide.
Claim 14
Dependent Claim
20 words
The article as claimed in claim 2, wherein said backing layer has a thickness of about 0.5 to 5 μ.
Claim 15
Dependent Claim
19 words
The article as claimed in claim 12, wherein said backing layer has a thickness of 1 to 3 μ.
Claim 16
Dependent Claim
22 words
The article as claimed in claim 1, wherein said Japanese paper has an interval of about 100 μ between said bast fibers.
Claim 17
Dependent Claim
22 words
The article as claimed in claim 2, wherein said Japanese paper has an interval of about 100 μ between said bast fibers.
Claim 18
Dependent Claim
27 words
The article as claimed in claim 1, wherein said bast fibers are selected from the group consisting of flax, hemp, jute, ramie, paper mulberry, Mitsumata, and Ganpi.
Claim 19
Dependent Claim
23 words
The article as claimed in claim 16, wherein said bast fibers are selected from the group consisting of paper mulberry, Mitsumata, and Ganpi.
Claim 20
Dependent Claim
27 words
The article as claimed in claim 2, wherein said bast fibers are selected from the group consisting of flax, hemp, jute, ramie, paper mulberry, Mitsumata, and Ganpi.
Claim 21
Dependent Claim
23 words
The article as claimed in claim 18, wherein said bast fibers are selected from the group consisting of paper mulberry, Mitsumata, and Ganpi.
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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) | 1981-07-31 | 1982-01-30 | 1982-08-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-07-31 | 1986-01-30 | 1986-08-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-07-31 | 1990-01-30 | 1990-08-01 | $7700.00 | Window Closed / Lapsed |