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<p>[QUOTE=&quot;GDJMSP, post: 4954863, member: 112&quot;]No, I&#039;m not assuming any such thing. I am merely pointing out that the rim experiences 3 independent pressure incidents, each of which would and could help reduce any planchet marks at the rim. The rim is the only part of the coin that has this happen to it.</p><p><br /></p><p>And I readily acknowledged that there could still be some planchet marks remaining on the rim after the coin was struck. My point was that the probability of planchet remaining on the rim is greatly reduced, far more so than anywhere else on the coin.</p><p><br /></p><p><br /></p><p><br /></p><p>I&#039;m well aware of this. And if you dig into it you&#039;ll find that I&#039;m one of the first to explain that. Prior to that, and in just about every book and article you&#039;ll find it was said that metal flowed outwards towards the rim. The words that were always most commonly used were - radiating outwards towards the rim. But, it doesn&#039;t radiate outwards at all, it moves inwards towards the center of the coin. </p><p><br /></p><p><br /></p><p><br /></p><p>No, it&#039;d doesn&#039;t relieve pressure at the rim at all. To the contrary, one of the reasons the metal does flow inward and into the devices is because of the high pressure at the rim. If there were not high pressure at rim, far less metal would flow inwards. The pressure is high at the rim from the very beginning of the strike. And high pressure is maintained at the rim because the pressure is contained there. That is the very reason why the collar was invented - to contain and maintain pressure at the rim - and thus help force the metal to flow inwards.</p><p><br /></p><p>To confirm this all one has to so is look at coins that were struck without a collar, or those that undergo a collar error.</p><p><br /></p><p>Lastly, additional proof of high pressure being constant and maintained throughout the strike is clearly indicated by any and all coins that show finning. Finning could not even occur unless there was extremely high pressure specifically at the rim.</p><p><br /></p><p>And if you look closely at the 3 dimes that started this thread, you&#039;ll see evidence of minor finning from about 2 o&#039;clock to 3 on the obv, and the corresponding area of the rev ( 3 to 4) on the first coin -</p><p><br /></p><p>[ATTACH=full]1190960[/ATTACH]</p><p><br /></p><p><br /></p><p>And roughly the same area on the 2nd and 3rd coins as well.</p><p><br /></p><p>[ATTACH=full]1190961[/ATTACH]</p><p><br /></p><p><br /></p><p>[ATTACH=full]1190962[/ATTACH]</p><p><br /></p><p><br /></p><p>That minor finning would not even be possible, could not occur, unless there was high pressure at the rim.[/QUOTE]</p><p><br /></p>

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