Mechanical Music Digest™  Archives

MMD Archives February 1997 1997.02.22 05 Prev  Next Folding Bellows Corners By Larry Lobel Player Piano Company in their catalog recommends the best crease in bellows is _no crease_ at all:   "If the cotton pneumatic cloth is never creased, but instead allowed   to fold naturally by vacuum under a situation where the pneumatic is   prevented from closing by 1/8", the wear life will be increased by   three times.   Most player manufacturers placed a felt punching inside the   pneumatic, just behind the fold, to prevent the hard crease.  A few   makers did not do this, and the result was pinholes and slits on the   folds after about ten year's use." Any other opinions or experiences about this? Larry Lobel (Message sent Sat 22 Feb 1997, 15:41:12 GMT, from time zone GMT-0500.) Key Words in Subject:  Bellows, Corners, Folding

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