Patent US4161005A successfully refreshed from Google Patents.
US4161005A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetic heads and fixing material with an additional filler of MoS2
Assignee: Canon Inc
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Filing: 1977-10-26
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Granted: 1979-07-10
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Expires: 1997-10-26
Abstract
Abstract A magnetic head comprises a magnetic core having a sliding surface on which a magnetic tape moves sliding, a casing for enclosing said magnetic core, and a fixing material used to secure said magnetic core within said casing, said fixing material essentially consisting of a resin, a filler and MoS 2 added as an additional filler.
Inventors
- 👤 Hiroaki Kato
- 👤 Junji Hamana
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 19:12
CPC Classifications
G; G11; G11B; G11B5/00; G11B5/10; G11B5/105; G11B5/127; G11B5/187; G11B5/255
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
79 words
A magnetic head comprising: a magnetic core having a sliding surface on which a magnetic tape moves; a casing for enclosing said magnetic core; and a fixing material used to secure said magnetic core within said casing, said fixing material comprising not less than 19.5% by weight of a resin having adhesiveness, 40-80% by weight of a fine powder of SiO 2 as a filter and 0.5-50% by weight of a fine powder of MoS 2 as another filler.
Claim 2
Dependent Claim
79 words
A magnetic head comprising: a magnetic core having a sliding surface on which a magnetic tape moves; a casing for enclosing said magnetic core; and a fixing material used to secure said magnetic core within said casing, said fixing material comprising not less than 19.5% by weight of a resin having adhesiveness, 40-80% by weight of a fine powder of SiO 2 as a filter and 0.5-50% by weight of a fine powder of MoS 2 as another filler.
Claim 3
Dependent Claim
45 words
A magnetic head according to claim 1, in which the magnetic core is composed of permalloy, and the fixing material contains about 60% by weight of a fine powder of SiO 2 and about 10% by weight of a fine powder of MoS 2 .
Claim 4
Dependent Claim
45 words
A magnetic head according to claim 1, in which the magnetic core is composed of sendust, and the fixing material contains about 60% by weight of a fine powder of SiO 2 and about 5% by weight of a fine powder of MoS 2 .
Claim 5
Dependent Claim
17 words
A magnetic head according to claim 1, in which the resin having adhesiveness is an epoxy resin.
Claim 6
Dependent Claim
45 words
A magnetic head according to claim 4, in which the magnetic core is composed of permalloy, and the fixing material contains about 60% by weight of a fine powder of SiO 2 and about 10% by weight of a fine powder of MoS 2 .
Claim 7
Dependent Claim
45 words
A magnetic head according to claim 4, in which the magnetic core is composed of sendust, and the fixing material contains about 60% by weight of a fine powder of SiO 2 and about 5% by weight of a fine powder of MoS 2 .
Claim 8
Dependent Claim
91 words
A magnet head comprising: a magnetic core having a sliding surface on which a magnetic tape moves; a casing for enclosing said magnetic core; and a fixing material used to secure said magnetic core within said casing, said fixing material comprising not less than 19.5% by weight of a resin having adhesiveness, 40-80% by weight of a fine powder of SiO 2 as a filler and 0.5-50% by weight of a fine powder of MoS 2 as another filler, said fixing material being present in the vicinity of the sliding surface.
Claim 9
Dependent Claim
91 words
A magnet head comprising: a magnetic core having a sliding surface on which a magnetic tape moves; a casing for enclosing said magnetic core; and a fixing material used to secure said magnetic core within said casing, said fixing material comprising not less than 19.5% by weight of a resin having adhesiveness, 40-80% by weight of a fine powder of SiO 2 as a filler and 0.5-50% by weight of a fine powder of MoS 2 as another filler, said fixing material being present in the vicinity of the sliding surface.
Claim 10
Dependent Claim
91 words
A magnetic head comprising: a magnetic core having a sliding surface on which a magnetic tape moves; a casing for enclosing said magnetic core; and a fixing material used to secure said magnetic core within said casing, said fixing material comprising not less than 19.5% by weight of epoxy resin having adhesiveness, 40-80% by weight of a fine powder of SiO 2 as a filler and 0.5-50% by weight of a fine powder of MoS 2 as another filler, said fixing material being present in the vicinity of the sliding surface.
Claim 11
Dependent Claim
91 words
A magnetic head comprising: a magnetic core having a sliding surface on which a magnetic tape moves; a casing for enclosing said magnetic core; and a fixing material used to secure said magnetic core within said casing, said fixing material comprising not less than 19.5% by weight of epoxy resin having adhesiveness, 40-80% by weight of a fine powder of SiO 2 as a filler and 0.5-50% by weight of a fine powder of MoS 2 as another filler, said fixing material being present in the vicinity of the sliding surface.
Claim 12
Dependent Claim
99 words
A magnetic head comprising: a magnetic core having a sliding surface on which a magnetic tape moves; a casing for enclosing said magnetic core; and a fixing material used to secure said magnetic core within said casing, said fixing material essentially consisting of a resin, a filler and MoS 2 added as an additional filler, wherein said fixing material is a mixture of at least 19.5% by weight of an epoxy resin, 40 to 80% by weight of a fine powder of SiO 2 , and 0.5 to 50% by weight of a fine powder of MoS 2 .
Claim 13
Dependent Claim
99 words
A magnetic head comprising: a magnetic core having a sliding surface on which a magnetic tape moves; a casing for enclosing said magnetic core; and a fixing material used to secure said magnetic core within said casing, said fixing material essentially consisting of a resin, a filler and MoS 2 added as an additional filler, wherein said fixing material is a mixture of at least 19.5% by weight of an epoxy resin, 40 to 80% by weight of a fine powder of SiO 2 , and 0.5 to 50% by weight of a fine powder of MoS 2 .
References Cited (Backward Citations)
US3495048A
Cited
US3586788A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-07-09 | 1983-01-08 | 1983-07-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-07-09 | 1987-01-08 | 1987-07-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-07-09 | 1991-01-08 | 1991-07-10 | $7700.00 | Window Closed / Lapsed |