| 摘要 |
A device for printing on a strip of paper shaped as a roll about a spool, the device comprising a housing for receiving the roll, means for supporting the roll from beneath in the housing and for horizontally centering the roll substantially on a vertical reference axis, a travel path for the strip of paper from the housing to a printer member, and a control member associated with a drive member for driving the strip of paper along the travel path, the device comprises at least one sensor for sensing the position of the spool along the vertical reference axis, the sensor being secured to at least one side face of the housing, and being connected to the control member for controlling the drive member.
|
