Patent US4446205A successfully refreshed from Google Patents.
US4446205A
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Magnetic recording tape having a leader tape
Assignee: Fujifilm Holdings Corp
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Filing: 1982-12-07
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Granted: 1984-05-01
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Expires: 2002-12-07
Abstract
Abstract A leader tape for use in connection with a magnetic recording tape is disclosed. The leader tape is connected to one or both ends of a magnetic recording tape in order to clean components of the recorder such as the head of the recorder in which the tape is used. The leader tape is comprised of a support base having a cleaning layer coated thereon. The cleaning layer is comprised of a binder having dispersed therein an organic thermoplastic high molecular powder having a particle size of 0.1 to 20 μm and an organic thermosetting high molecular powder having a particle size of 0.1 to 10 μm. The leader tape has a light percent transmittence of 20% or more.
Inventors
- 👤 Chiaki Mizuno
- 👤 Yasuo Tamai
- 👤 Nobuo Tsuji
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 18:29
CPC Classifications
G; G11; G11B; G11B5/00; G11B5/62; G11B5/627; G11B23/00; G11B23/20; G11B23/26; Y; Y10; Y10S; Y10S428/00; Y10S428/90; Y10T; Y10T428/00; Y10T428/25; Y10T428/254
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
70 words
A leader tape, comprising: a support base; and a cleaning layer coated on a surface of the support base, cleaning layer comprising a binder having dispersed therein an organic thermoplastic high molecular powder having a particle size of 0.1 to 20 μm and an organic thermosetting high molecular powder having a particle size of 0.1 to 10 μm, the leader tape having a light percent transmittance of 20% or more.
Claim 2
Dependent Claim
70 words
A leader tape, comprising: a support base; and a cleaning layer coated on a surface of the support base, cleaning layer comprising a binder having dispersed therein an organic thermoplastic high molecular powder having a particle size of 0.1 to 20 μm and an organic thermosetting high molecular powder having a particle size of 0.1 to 10 μm, the leader tape having a light percent transmittance of 20% or more.
Claim 3
Dependent Claim
31 words
A leader tape as claimed in claim 1, wherein the thermoplastic high molecular powder has a maximum particle size of 10 μm and average size of between 2.0 to 3.5 μm.
Claim 4
Dependent Claim
23 words
A leader tape as claimed in claim 1, wherein the thermosetting high molecular powder has a particle size of 0.3 to 3 μm.
Claim 5
Dependent Claim
28 words
A leader tape as claimed in claim 1, wherein the weight ratio of the thermoplastic high molecular powder to the thermosetting high molecular powder is 2/98 to 80/20.
Claim 6
Dependent Claim
28 words
A leader tape as claimed in claim 4, wherein the weight ratio of the thermoplastic high molecular powder to the thermosetting high molecular powder is 5/95 to 70/30.
Claim 7
Dependent Claim
37 words
A leader tape as claimed in claim 1, wherein the weight ratio of the combined amount of the organic thermoplastic high molecular powder and the organic thermosetting high molecular powder to the binder is 1/6 to 3/1.
Claim 8
Dependent Claim
28 words
A leader tape as claimed in claim 6, wherein the weight ratio of the combineded amount of the high molecular powders to the binder is 1/5 to 1/1.
Claim 9
Dependent Claim
37 words
A leader tape as claimed in claim 1, wherein the thermoplastic high molecular weight powder is comprised of a polymer selected from the group consisting of acetylcellulose, polyethylene, polypropylene, polystyrene, thermoplastic polyester, polyamide, polyacrylonitrile and polyacetal resin.
Claim 10
Dependent Claim
16 words
A leader tape as claimed in claim 8, wherein the polymer is polyethylene, polypropylene or polyamide.
Claim 11
Dependent Claim
43 words
A leader tape as claimed in claim 1, wherein the thermosetting high molecular weight powder is comprised of a polymer selected from the group consisting of phenol resin, urea resin, triazine type resin, melamine resin, epoxy resin, furan resin and acrolein type resin.
Claim 12
Dependent Claim
75 words
A magnetic recording tape having a leader tape at its end, the leader tape comprising a support base having on a surface thereof a cleaning layer comprising a binder having dispersed therein an organic thermoplastic high molecular powder having a particle size of 0.1 to 20 μm and an organic thermosetting high molecular powder having a particle size of 0.1 to 10 μm, the leader tape having a light percent transmittance of 20% or more.
Claim 13
Dependent Claim
75 words
A magnetic recording tape having a leader tape at its end, the leader tape comprising a support base having on a surface thereof a cleaning layer comprising a binder having dispersed therein an organic thermoplastic high molecular powder having a particle size of 0.1 to 20 μm and an organic thermosetting high molecular powder having a particle size of 0.1 to 10 μm, the leader tape having a light percent transmittance of 20% or more.
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) | 1987-05-01 | 1987-10-31 | 1988-05-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-05-01 | 1991-10-31 | 1992-05-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-05-01 | 1995-10-31 | 1996-05-01 | $7700.00 | Window Closed / Lapsed |