US PATENT SUBCLASS 84 / 156
.~.~.~.~ Duct closers
Current as of: June, 1999
Click HD for Main Headings
Click for All Classes
| 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.