US5475548A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrostatic discharge protection for a magnetic tape cartridge
Assignee: Tandberg Data Storage AS
•
Filing: 1994-05-06
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Granted: 1995-12-12
•
Expires: 2014-05-06
Abstract
Abstract A magnetic tape drive for magnetic tape housed within a cartridge is provided which includes a rectangular access through which the cartridge is inserted into the drive and a wiping member operatively positioned at an edge of the access such that the cartridge is contacted during insertion into the drive. The wiping member is so constructed and coupled to electrical ground that electrostatic charge on the cartridge is bled to electrical ground, the wiping member being made of a conductive polymer or plastic material.
Inventors
- 👤 Guttorm Rudi
- 👤 Per O. Pahr
- 👤 Bjorn Engan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 17:08
CPC Classifications
G; G11; G11B; G11B15/00; G11B15/675; G11B23/00; G11B23/50; G11B23/502
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
176 words
A magnetic tape drive for magnetic tape housed within a cartridge, comprising a rectangular access through which the cartridge is inserted along a tape cartridge path into the drive and a wiping member operatively positioned and extending along an edge of the access to contact the cartridge during and throughout insertion of the cartridge into the drive, the wiping member being coupled to electrical ground to bleed electrostatic charge on the cartridge to electrical ground, the wiping member comprising a conductive polymer material, the wiping member comprising a resilient structure that engages the cartridge along an entire width of a face of the cartridge, the wiping member comprising a compressible strip, the wiping member having a resistivity and dimensions such that an electrical charge is bled from the cartridge to electrical ground over a time frame greater than one millisecond, the wiping member having a convex surface which is bent into the tape cartridge path and is compressed towards a base of the access by the tape cartridge as the cartridge is inserted into the drive.
Claim 2
Dependent Claim
176 words
A magnetic tape drive for magnetic tape housed within a cartridge, comprising a rectangular access through which the cartridge is inserted along a tape cartridge path into the drive and a wiping member operatively positioned and extending along an edge of the access to contact the cartridge during and throughout insertion of the cartridge into the drive, the wiping member being coupled to electrical ground to bleed electrostatic charge on the cartridge to electrical ground, the wiping member comprising a conductive polymer material, the wiping member comprising a resilient structure that engages the cartridge along an entire width of a face of the cartridge, the wiping member comprising a compressible strip, the wiping member having a resistivity and dimensions such that an electrical charge is bled from the cartridge to electrical ground over a time frame greater than one millisecond, the wiping member having a convex surface which is bent into the tape cartridge path and is compressed towards a base of the access by the tape cartridge as the cartridge is inserted into the drive.
Claim 3
Dependent Claim
15 words
The magnetic tape drive of claim 1, wherein the wiping member comprises a finger strip.
Claim 4
Dependent Claim
21 words
The magnetic tape drive of claim 1, wherein the wiping member comprises a polymer in which are embedded conductive metal particles.
Claim 5
Dependent Claim
20 words
The magnetic tape drive of claim 1, wherein the wiping member comprises a polymer coated with an electrically conductive coating.
Claim 6
Dependent Claim
22 words
The magnetic tape drive of claim 1, further comprising a channel formed along the edge within which the wiping member is located.
Claim 7
Dependent Claim
54 words
The magnetic tape drive of claim 1, further comprising a channel extending along the edge of the access, the wiping member being operatively received and secured within the channel, a top of the wiping member forming said convex surface which makes contact with the tape cartridge as it is inserted into the tape drive.
Claim 8
Dependent Claim
23 words
The magnetic tape drive of claim 6, comprising insulating matter operatively disposed between the wiping member and the side walls of the channel.
Claim 9
Dependent Claim
174 words
A magnetic tape drive for magnetic tape housed within a cartridge which has a metal base plate, the tape drive comprising: a chassis; a drive housing mounted on the chassis, the drive housing having an access through which the cartridge is received along a tape cartridge path into the drive, the access being substantially rectangular in shape, the access including a wiping member operatively positioned along an edge thereof to wipe the cartridge while it is inserted into the drive and operatively coupled to electrical ground thereby to remove electrostatic charge from the cartridge within a time frame greater than one millisecond, the wiping member comprising a conductive polymer material, the wiping member comprising a resilient structure that engages the cartridge along an entire width of a face of the cartridge, the wiping member comprising a compressible strip and having a convex surface which is bent into the tape cartridge path and is compressed towards a base of the access by the cartridge base plate as the cartridge is inserted into the tape drive.
Claim 10
Dependent Claim
174 words
A magnetic tape drive for magnetic tape housed within a cartridge which has a metal base plate, the tape drive comprising: a chassis; a drive housing mounted on the chassis, the drive housing having an access through which the cartridge is received along a tape cartridge path into the drive, the access being substantially rectangular in shape, the access including a wiping member operatively positioned along an edge thereof to wipe the cartridge while it is inserted into the drive and operatively coupled to electrical ground thereby to remove electrostatic charge from the cartridge within a time frame greater than one millisecond, the wiping member comprising a conductive polymer material, the wiping member comprising a resilient structure that engages the cartridge along an entire width of a face of the cartridge, the wiping member comprising a compressible strip and having a convex surface which is bent into the tape cartridge path and is compressed towards a base of the access by the cartridge base plate as the cartridge is inserted into the tape drive.
Claim 11
Dependent Claim
15 words
The magnetic tape drive of claim 8, wherein the wiping member comprises a finger strip.
Claim 12
Dependent Claim
22 words
The magnetic tape drive of claim 8, wherein the wiping member comprising a conductive polymer in which are embedded conductive metal particles.
Claim 13
Dependent Claim
21 words
The magnetic tape drive of claim 8, wherein the wiping member comprises a conductive polymer coated with an electrically conductive material.
Claim 14
Dependent Claim
54 words
The magnetic tape drive of claim 8, further comprises a channel extending along the edge of the access, the wiping member being operatively received and secured within the channel, a top of the wiping member forming said convex surface which makes contact with the tape cartridge as it is inserted into the tape drive.
Claim 15
Dependent Claim
25 words
The magnetic tape drive of claim 8, further comprising a channel formed along the edge of the access within which the wiping member is located.
Claim 16
Dependent Claim
22 words
The magnetic tape drive of claim 13, comprising insulating matter operatively disposed between the wiping member and side walls of the channel.
Claim 17
Dependent Claim
162 words
A magnetic tape drive for magnetic tape housed within a cartridge having a metal base plate, the tape drive including means for coupling the metal base plate to electrical ground as the cartridge is inserted along a tape cartridge path into the tape drive in such a manner that electrostatic charge on the cartridge is discharged to electrical ground over a time frame greater than one millisecond, the means comprising a wiping member having a resilient structure made with a conductive polymer material, the wiping member extending along an edge of a rectangular access in the tape drive for the cartridge and engaging the cartridge along an entire width of a face of the cartridge throughout the insertion process, the wiping member comprising a compressible strip and having a convex surface which is bent into the tape cartridge path and is compressed towards a base of the access by the cartridge base plate as the cartridge is inserted into the tape drive.
Claim 18
Dependent Claim
162 words
A magnetic tape drive for magnetic tape housed within a cartridge having a metal base plate, the tape drive including means for coupling the metal base plate to electrical ground as the cartridge is inserted along a tape cartridge path into the tape drive in such a manner that electrostatic charge on the cartridge is discharged to electrical ground over a time frame greater than one millisecond, the means comprising a wiping member having a resilient structure made with a conductive polymer material, the wiping member extending along an edge of a rectangular access in the tape drive for the cartridge and engaging the cartridge along an entire width of a face of the cartridge throughout the insertion process, the wiping member comprising a compressible strip and having a convex surface which is bent into the tape cartridge path and is compressed towards a base of the access by the cartridge base plate as the cartridge is inserted into the tape drive.
Claim 19
Dependent Claim
15 words
The magnetic tape drive of claim 15, wherein the wiping member comprises a finger strip.
Claim 20
Dependent Claim
20 words
The magnetic tape drive of claim 15, wherein the wiping member comprising a polymer in which are embedded conductive particles.
Claim 21
Dependent Claim
20 words
The magnetic tape drive of claim 15, wherein the wiping member comprising a polymer coated with an electrically conductive coating.
Claim 22
Dependent Claim
54 words
The magnetic tape drive of claim 15, further comprising a channel extending along the edge of the access, the wiping member being operatively received and secured within the channel, a top of the wiping member forming said convex surface which makes contact with the tape cartridge as it is inserted into the tape drive.
Claim 23
Dependent Claim
25 words
The magnetic tape drive of claim 15, further comprising a channel formed along the edge of the access within which the wiping member is located.
Claim 24
Dependent Claim
23 words
The magnetic tape drive of claim 20, comprising insulating matter operatively disposed between the wiping member and the side walls of the channel.
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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) | 1998-12-11 | 1999-06-12 | 1999-12-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-12-11 | 2003-06-12 | 2003-12-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-12-11 | 2007-06-12 | 2007-12-12 | $7700.00 | Window Closed / Lapsed |