Large format printers that are capable of printing in roll‐to‐roll mode usually have a Take‐Up Reel
(TUR) that is located in a low position of the printer. For this reason, if the user wants to operate the
TUR, usually it has to bend down to a position from where it is not possible to reach the front panel
of the printer. In these cases, during TUR operation it is not possible to command the printer unless
there are some devices in the TUR module (such as buttons, levers, switches, … that allow the user
to do it. Generally, though, these devices are only intended to move the TUR forward and backwards
to facilitate the media loading operation and/or to choose the winding direction.
The present feature enables the user to transmit orders to the printer through the TUR itself by means
of some sequences of inputs.
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INC, HP, "TUR AS AN INPUT DEVICE TO COMMUNICATE WITH THE PRINTER", Technical Disclosure Commons, (October 29, 2019)