Starting iLabel EPSON app with a parameter (a string, representing a content to print)

I try to start an application , from my own app (under android kitkat), through an intent with parameters.

The concerned app is the EPSON iLabel, which allows to print (bluetooth or USB) from an android gear on portable label printers like EPSON LW600P.

The parameter I want to pass represents a file name which is the content to print on the printer.

I know how to launch the iLabel app alone with an intent call, it works, but i don't know if i can pass parameters and how ? The aim is to start the app with the content to print (known in my app) After the user will just have to push "print" in iLabel...

I'm not a specialist and after many research i'm stuck on explorating the iLabel app manifest (see under) :

I'm not able to identify the interesting area and after this, how to code the corresponding call in my code (with PutExtras(), another way ?) Maybe it's not possible as regards the manifest...

If anybody has already done this kind of call .. thanks a lot in advance for any information !

Sincerely,

Miles39