fair@ucbarpa.BERKELEY.EDU (Erik E. Fair) (12/05/85)
I'm looking for a metal or metal-alloy called `mu-metal' (mu as in the greek letter). It is reputed to be a near perfect magnetic insulator or shield. It has reportedly been used for making floppy disk containers (you know, where you put the disks when they're not in the drive), by some unnamed company. I would like to know: 1. The Address or Phone Number of the company/companies that make such a floppy disk container, from the stated material. 2. The Address or Phone Number of the company/companies that make the metal itself. Please reply by ELECTRONIC MAIL. The shorter the path, the better; I'm in a bit of a hurry... tusen tak, Erik E. Fair ucbvax!fair fair@ucbarpa.berkeley.edu
hes@ecsvax.UUCP (Henry Schaffer) (12/06/85)
> I'm looking for a metal or metal-alloy called `mu-metal' (mu as in the > greek letter). It is reputed to be a near perfect magnetic insulator or > shield. It has reportedly been used for making floppy disk containers > > Erik E. Fair ucbvax!fair fair@ucbarpa.berkeley.edu To shield floppies and other magnetic media, one can use standard magnetic shielding materials. Mu-metal is one such, but there are other types. Some care has to be taken in fabricating carrying cases, because working with these materials can alter their magnetic shielding properties (and then you have to re-anneal the metal.) Magnetic shielding is most commonly used to shield CRT tubes, and many of the companies which make CRT shields have also started producing stock products for carrying magnetic tape, cartridges, etc. Most of them sell foil shielding material which can be used to line a carrying case. Here is a list of some companies: Ad-vance Magnetics, Inc. This company sells data media 625 Monroe St. carrying cases. Rochester IN 46975 (219)223-3158 amuneal Mfg. Corp 4737 Darrah St Phila. PA 19124 (215)535-3000 Eagle Magnetic Co., Inc. PO Box 24283 Indianapolis, Ind, 46224 (317)297-1030 Magnetic Shield Div Perfection Mica Co 750 North Thomas Drive Bensenville, Ill. 60106 (312)766-7800 MuShield Co 121 Madison St. PO Box W Malden, MA 02148-6890 (617)321-4410 --henry schaffer n c state univ