At just 16 lbs, the easy-to-use Signascript Atlantic series is the perfect choice for your automatic signature needs. An Atlantic machine can reproduce your signature or short note using any writing instrument. Any surface that can be signed by hand can be signed by signature machines – from letters to sports memorabilia to business cards. Lightweight and portable, the Atlantic series is easily stored or shared between offices. With an ordinary SD card reader/removable disk drive, signature files can be easily changed or updated. Both pen pressure and speed can be varied.
An example:
https://damilic.com/autopen-products/office-signature-machines
Wow, did not know it was such a device (in essence, a portable plotter).