Comment 33 for bug 1577137

Alvaro Gil, the original reporter's problem noted in the Bug Description is the scope of this long closed report.

Despite this, when stating documentation you are referring to https://help.ubuntu.com/community/SaneDaemonTutorial to advise, this was tested working in Xenial at the time of its creation with my hardware. Also, this follows the systemd man page of how to set up unit configuration files as per:
http://manpages.ubuntu.com/manpages/xenial/en/man5/systemd.unit.5.html

However, if you found that when following either your equipment doesn't work, you likely have an equipment specific issue, or perhaps a systemd issue. Hence, to have your issue addressed, you will want to file a new report via a terminal:
ubuntu-bug sane-backends

Please feel free to subscribe me to it.