US PATENT SUBCLASS 242 / 331.3
.~.~.~.~ Pneumatic pressure controller

Current as of: June, 1999
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242 /   HD   WINDING, TENSIONING, OR GUIDING

324  DF  UNWINDING AND REWINDING A MACHINE CONVERTIBLE INFORMATION CARRIER (E.G., MAGNETIC TAPE OR PHOTOGRAPHIC FILM) {13}
331  DF  .~ Intermediate storage (e.g., low inertia bin) {2}
331.1  DF  .~.~ Vacuum column {1}
331.2  DF  .~.~.~ Carrier responsive control {2}
331.3.~.~.~.~ Pneumatic pressure controller

DEFINITION

Classification: 242/331.3

Pneumatic pressure controller:

(under subclass 331.2) Subject matter wherein the regulator comprises a device sensitive to the air pressure or its flow to regulate the amount of carrier in the buffer zone.