Comment 1 for bug 163309

I can confirm that this problem also occurs with the Epson Stylus Photo RX595 all-in-one.

In my case, lsusb gave:

Bus 004 Device 007: ID 04b8:083c Seiko Epson Corp.

So, the magic line in /etc/udev/rules.d/45-libsane.rules was:

# Epson RX595
SYSFS{idVendor}=="04b8", SYSFS{idProduct}=="083c", MODE="664", GROUP="scanner"

Scanning now works perfectly, though sane detects the scanner as something else

$ scanimage -L
device `epkowa:libusb:004:007' is a Epson PM-A840 flatbed scanner