Re: [ARSCLIST] Delamination on Aluminum base laquer disc

[George Brock-Nannestad <pattac@xxxxxxxx>]

From: Patent Tactics, George Brock-Nannestad


John Loy wrote:

> Does anyone have any suggestions for playing back delaminating Laquer 
> discs? The pieces are shrinking. These gaps are so big they  actually 
> send the stylus flying off the cartridge.


----- two approaches have been tried successfully: 

 - at what was for a period called FilmSoundAustralia they successfully made 
loose pieces expand by the absorption of solvent (fume cupboard!); they were 
reattached in the correct relationship and replayed

 - the Swiss Institute of Technology developed a trailing optical fiber that 
could track a groove by being pulled along it as the  record rotated in the 
normal way. This certainly does not get any grip on the tip of the fiber, and 
you can get a signal, however, I would expect some loss of high frequencies. 
It was certainly developed into a well-functioning prototype, but I have not 
seen any commercialization.

Best wishes,


George