Broadcast Electronics 3000 Series - Page 138

TAPE HUB, TEFLON WASHER, AND CENTER POST
The tape hub stores the tape which is not passing by the cartridge
openings. The hub is free to rotate around the center post. To
allow free rotation, a teflon washer is used between the hub and
the shell. Some means must be provided to keep the tape flat on the
hub. A
separate cover may fit over the hub, the top may be molded
so that the clearance between the hub and the shell is just greater
than the tape width, or a hold-down wire may be placed so that it
passes above one side of the hub.
CORNER POST
HOLD DO~ WIRE
HUB
TEI=LON WASI-IER
E>E:"TWEE:N HU.B
AIVD SHE:"Lt. ..
CLUTCH SPRING OR HUB BRAKE (SPRING ACTION DEVICE)
The clutch spring or hub brake keeps the tape from moving when the
cartridge is not in place in a machine. This is done either by
applying a brake to the hub or by pressing the tape against the
shell. The clutch or brake is released by the shaft of the pressure
roller when the roller is in the vertical position.
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