Symbol 2936 from ISO 7000 - Title/Meaning: Material (bar) loading guide, 1 bar used up 
Function/description: To indicate that the multiple bar feeder (material loading guide) is present and one bar is used up (empty).
Own work using: iso.org/obp/graphics/grs/ec4a8e61-1339-4315-a8f3-3732af280de6 200.png
Vectorization:  Mrmw