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  1. #41
    Forum Ambassador VAB2013's Avatar
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    Great photos and research Jim! Thanks Jon for sending this one to Jim so we can all see what happened! So it's a rim burr that got sliced off the proto-rim during the upset mill process that landed back on the planchet and stayed there where it then got struck by the obverse die and got pushed up into the rim? I just realized by reading Will's definition that the upset mill has feeder fingers too.

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  3. #42
    Moderator jfines69's Avatar
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    It may have been a rim bur but I do not think it would have come off until the planchet entered the strike chamber... Maybe the collar knocked it loose and popped it up onto the planchet... The shape/size of the rims inside is consistent with the shape/size of the sliver from the edge... Found this about the upset mill https://www.youtube.com/watch?v=TCI16hXpRQk I was unaware of the upset mill having feeder fingers... Cool!!!
    Jim
    (A.K.A. Elmer Fudd) Be verwy verwy quiet... I'm hunting coins!!! Good Hunting!!!

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  5. #43
    Forum Ambassador VAB2013's Avatar
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    Thank you Jim for the video link, that's very cool! Can't really tell where the feeder fingers are in the proto-rim process, you see the blanks dropping out of a thing so something must be feeding them into the upsetting mill and/or feeding them out of it (I don't think the video is showing all of that process, but it's kind of choppy so maybe I missed it)

    That's a steep drop at the 42 second mark of the video! Reminds me of a roller coaster ride
    Last edited by VAB2013; 12-04-2018 at 02:05 PM.

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  7. #44
    Moderator jfines69's Avatar
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    Gravity can be a blast - weeeeeeeeeee
    Jim
    (A.K.A. Elmer Fudd) Be verwy verwy quiet... I'm hunting coins!!! Good Hunting!!!

 

 

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