Screen door roller wheel

Hi I'm trying to figure out what type of wheel roller goes to my screen door. I can't find a manufacturer name on the door itself and can only see patent no 3,090,0??
Any assistant in identifying this part would be appreciated or the type of screen roller it is to look up How to property remove it to replace.
Thank you

I have posted a better picture. Is this an M frame type roller? Having a hard time locating a place to purchase replacements.
Thank you