US PATENT SUBCLASS 84 / 156
.~.~.~.~ Duct closers


Current as of: June, 1999
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84 /   HD   MUSIC

1  DF  INSTRUMENTS {9}
*  DD  .~ Automatic {13}
115  DF  .~.~ Selectors {8}
151  DF  .~.~.~ Trackers {6}
156.~.~.~.~ Duct closers


DEFINITION

Classification: 84/156

Means to close a few ducts at the end of a row if a narrow sheet is used or to close all during rewinding or skipping.