yamaha balance rail question

[Mike Morvan]

John,
    Good point, however, buttons are still bushed from underneath and this has changed very little in the last 120 years also. It is part of a production method which necessitates the little piece of cloth being there and I believe it is there for that reason alone. It is under the active mortise area and in my opinion serves no purpose. Buttons will probably be made this way until a button maker mortises a solid block of wood, inserts the cloth on both sides with a caul and then slices it like a loaf of bread. I have heard it discussed but no one seems to be doing it yet. I have also yet to see a properly rebushed mortise lose it's bushing when placing the keys back on the pins, but just when I say I haven't seen it..  Sounds like a very interesting plug method you use why don't you post pictures. I have posted a picture of a production style bushing machine so that you can see why the little cloth tabs are there. The machine inserts cloth into both sides of the mortise, a heated caul descends, the glue is activated, then a cutter comes down and trims the cloth, the button material advances and the whole process starts again.  



Blackstone Valley piano
Michael A. Morvan
76 Sutton Street
Uxbridge, Ma 01569
(508) 278-9762
www.pianoandorgankeys.com
www.thepianorebuilders.com
-------------- next part --------------
An HTML attachment was scrubbed...
URL: https://www.moypiano.com/ptg/pianotech.php/attachments/20080907/eac055aa/attachment.html 
-------------- next part --------------
A non-text attachment was scrubbed...
Name: not available
Type: image/jpeg
Size: 7625 bytes
Desc: not available
Url : https://www.moypiano.com/ptg/pianotech.php/attachments/20080907/eac055aa/attachment.jpe