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Browse Prior Art Database

Magnetic Holding Device

IP.com Disclosure Number: IPCOM000051856D
Original Publication Date: 1981-Mar-01
Included in the Prior Art Database: 2005-Feb-11
Document File: 2 page(s) / 49K

Publishing Venue

IBM

Related People

Guzman, AM: AUTHOR [+3]

Abstract

A rotatable spool, such as a reel of magnetic tape, can be held tightly at a hub axial position and loosely at a second axial position beyond the previous position by using the metallic plate of the reel for holding the reel. In the first position a magnet through the plate positively holds the reel in position. If the push rod is axially actuated, the reel is separated from the magnet and a lower force such as a small magnet mounted to the rod, could hold the reel in position for a second operation, such as in a manufacturing process.

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Magnetic Holding Device

A rotatable spool, such as a reel of magnetic tape, can be held tightly at a hub axial position and loosely at a second axial position beyond the previous position by using the metallic plate of the reel for holding the reel. In the first position a magnet through the plate positively holds the reel in position. If the push rod is axially actuated, the reel is separated from the magnet and a lower force such as a small magnet mounted to the rod, could hold the reel in position for a second operation, such as in a manufacturing process.

As shown in the figure, in the retracted position the reel 1 is located adjacent a hub 2 by the attraction of the plate 3 to magnet 4. The reel 1 includes plate 3, a metallic disk, so that the magnet 4 can attract and hold the reel 1 against the hub
2. A rod 5 preferably of a low carbon steel centers the plate 3 which can also be of a low carbon steel. In the retracted position, the reel 1 can be rotated by the hub 2 in order to perform a manufacturing or drive operation such as to wind or unwind a tape media onto the reel.

To move the reel 1 to a second operation, the push rod 5 is moved axially such that the reel 1 is displaced from the retracted position and the push rod 5 is still in contact with the reel. The push rod and plate are separated from the magnet 4 so that the reel 1 is now loosely held by the push rod and plate. The push rod may include a second lower strength magnet 6 to hold the reel 1 in ...