US PATENT SUBCLASS 242 / 331.2
.~.~.~ Carrier responsive control

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.~.~.~ Carrier responsive control {2}
331.3  DF  .~.~.~.~> Pneumatic pressure controller
331.4  DF  .~.~.~.~> Photoelectric controller

DEFINITION

Classification: 242/331.2

Carrier responsive control:

(under subclass 331.1) Subject matter comprising a regulator sensitive to a condition of the carrier for determining the amount of the carrier in the buffer zone.