EP0054633B1
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Magnetic clamp for a magnetic tape reel
Assignee: International Business Machines Corp
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Filing: 1981-10-05
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Granted: 1984-03-28
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Expires: 2001-10-05
Abstract
No abstract record available.
Inventors
- 👤 Graham Mason Scot
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-04 14:06
CPC Classifications
G; G11; G11B; G11B15/00; G11B15/60; G11B15/66; G11B15/662; G11B15/18; G11B15/26; G11B15/32
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
135 words
A magnetic tape reel clamp in combination with a tape reel, said combination comprising an annular magnet (22) polarised in an axial direction and mounted in a magnet holder (17) having a centre pole (21) and an annular lip portion (20) to attract and clamp a metal plate (11) secured to the tape reel (10) and, providing a central opening (13) for the centre pole (21), the holder being mounted for rotation about the axis by a motor (14), characterised in that the centre pole (21) is extended above the surface of the magnet (22) and annular lip portion (20) to a point where the strength of the magnetic field is insufficient adversely to affect the condition of the tape on the reel (10) as the reel is placed upon or removed from the clamp.
Claim 2
Dependent Claim
135 words
A magnetic tape reel clamp in combination with a tape reel, said combination comprising an annular magnet (22) polarised in an axial direction and mounted in a magnet holder (17) having a centre pole (21) and an annular lip portion (20) to attract and clamp a metal plate (11) secured to the tape reel (10) and, providing a central opening (13) for the centre pole (21), the holder being mounted for rotation about the axis by a motor (14), characterised in that the centre pole (21) is extended above the surface of the magnet (22) and annular lip portion (20) to a point where the strength of the magnetic field is insufficient adversely to affect the condition of the tape on the reel (10) as the reel is placed upon or removed from the clamp.
Claim 3
Dependent Claim
47 words
A combination according to claim 1, in which the central opening (13) in the metal plate (11) is a close fit upon the extended centre pole (21) to provide a low reluctance shunt path between the centre pole (21) and lip portion (20) through the plate (11).
References Cited (Backward Citations)
No citation records indexed.
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