I am soon to start rebuilding the stack from a Kranich & Bach 88-note
player.  The action is unique in it's design and from an engineering
standpoint is very interesting even though completely different from
any other type of player action.  The tracker ducts are tubed to a
conventional leather pouch with lifter disc which, when the pouch
inflates, pushes up on a little wooden pin which free floats in a hole
in a specially machined valve seat.

The valve seat is mounted just below a rubber cloth diaphragm pouch.
The pouch has a special "double half moon" opening punched in it's
center.  A special thin aluminum backer disc (which also has the
"half moon" double opening) is glued to the underside of the rubber
cloth pouch and an inside leather valve is glued over the aluminum
backer disc.  The inside leather valve has the same "half moon" double
opening.

Another leather valve of simple design is glued on the outside of
the rubber pouch.  The action pneumatic, which has an opening on the
underside fitted with another metal valve seat, is glued in a position
just above the rubber pouch so that the outside leather valve seats
against the metal seat on the underside of the pneumatic.

When the leather pouch inflates, the lifter disc pushes up the wooden
pin which in turn pushes up on the center of the inside valve, pushing
up the rubber pouch and the outside valve mates against the metal seat
on the pneumatic.  This opens a direct flow of air from the pneumatic
through the valves into the vacuum chest, thus closing the pneumatic.
The air moves through the valves, rather than around the valves.

Anyway, I need a set of 3 steel punches made to make the leather
valves and the rubber cloth pouch.  The critical punch is for punching
the double half moon opening in both the rubber pouch and the inside
leather valve.  This punch could be designed so that it can also fit
into a second punch for the O.D. of the inside valves and the O.D.
punch can also be fitted with an inside punch for the I.D. of the
outside valves.  I hope this all makes sense.

See attached photos and drawing.  I can supply samples of the original
valves and pouch.  Can anyone here make theses punches for me or refer
me to someone that can?

Thanks
Dave Krall
Hammond, Indiana

 [ https://www.mmdigest.com/Attachments/20/09/30/200930_181718_K&B%20valves.jpg 
 [ https://www.mmdigest.com/Attachments/20/09/30/200930_181718_100_4581.JPG 
 [ https://www.mmdigest.com/Attachments/20/09/30/200930_181718_K%20&%20B%20stack.jpg