US3683445A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tape cleaning device
Assignee: Honeywell Inc
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Filing: 1970-04-20
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Granted: 1972-08-15
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Expires: 1990-04-20
Abstract
Abstract Tape cleaning apparatus for use in a magnetic tape transport device having a tape cleaner head which is located in the path of the moving tape. The tape cleaner head is provided with a blade formed of substantially non-magnetic hard material and operates in combination with vacuum to remove foreign particles of material from the tape surface to prevent signal disturbance.
Inventors
- 👤 Margery F Hagadorn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 02:33
CPC Classifications
G; G11; G11B; G11B23/00; G11B23/50; G11B23/502
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
153 words
Tape transport apparatus comprising; tape drive means having a pair of spaced tape contacting surfaces describing a substantially straight linear path therebetween over which tape is transported during operation of the apparatus, and a tape cleaning device disposed between said tape contacting surfaces, said tape cleaning device comprising a tape cleaner head having an arcuate surface extending into said tape path to at least contact a tape moved therealong, an opening formed in said head surface at said point of contact and elongated in a direction transverse to said tape path, and an elongated blade member disposed in said opening and having a blade edge extending no greater than 0.002 inch beyond said head surface into said tape path, whereby said cleaning device forces a tape from said linear path in a direction away from said device and is effective to remove particles from a tape in motion during operation of the apparatus.
Claim 2
Dependent Claim
153 words
Tape transport apparatus comprising; tape drive means having a pair of spaced tape contacting surfaces describing a substantially straight linear path therebetween over which tape is transported during operation of the apparatus, and a tape cleaning device disposed between said tape contacting surfaces, said tape cleaning device comprising a tape cleaner head having an arcuate surface extending into said tape path to at least contact a tape moved therealong, an opening formed in said head surface at said point of contact and elongated in a direction transverse to said tape path, and an elongated blade member disposed in said opening and having a blade edge extending no greater than 0.002 inch beyond said head surface into said tape path, whereby said cleaning device forces a tape from said linear path in a direction away from said device and is effective to remove particles from a tape in motion during operation of the apparatus.
Claim 3
Dependent Claim
38 words
Tape cleaning apparatus as set forth in claim 1 wherein said blade member comprises a surface disposed in co-planar relation with the path of tape movement at that point in which said head extends into the tape path.
Claim 4
Dependent Claim
34 words
Tape cleaning apparatus as set forth in claim 2 wherein said blade surface intersects a second blade surface forming an angle of approximately 60* to form said blade edge extending into said tape path.
Claim 5
Dependent Claim
51 words
Tape cleaning apparatus as set forth in claim 3 which is characterized by a pair of said so formed edges, one edge directed upstream into said tape path and one edge directed downstream into said tape path for operating on said tape surface when moved along said path in either direction.
Claim 6
Dependent Claim
23 words
Tape cleaning apparatus as set forth in claim 3 wherein said blade is formed of a chrome carbide alloy having substantially non-magnetic characteristics.
Claim 7
Dependent Claim
39 words
Tape cleaning apparatus as ser forth in claim 3 wherein said blade material is composed of essentially 83 percent chrome carbide, 15 percent nickel, and 2 percent tungsten within a range of plus or minus 10 percent by volume.
Claim 8
Dependent Claim
41 words
Apparatus as set forth in claim 3 wherein said blade is formed of a chrome carbide alloy consisting of from 75 percent to 90 percent chrome carbide, 1 percent to 3 percent tungsten and the remaining percentage of nickel by volume.
Claim 9
Dependent Claim
46 words
Apparatus as set forth in claim 3 wherein said blade is formed from a chrome carbide alloy material which is effective to produce a substantially non-magnetic blade having a remnant field of less than 0.5 gauss after exposure to A magnetic field of 5, 000 gauss.
Claim 10
Dependent Claim
30 words
The apparatus of claim 1 which further includes means for introducing sub-atmospheric pressure into said head opening to draw particles removed from the tape surface into said head for disposal.
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) | 1975-08-15 | 1976-02-14 | 1976-08-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-15 | 1980-02-14 | 1980-08-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-15 | 1984-02-14 | 1984-08-15 | $7700.00 | Window Closed / Lapsed |