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<p>[QUOTE=&quot;brg5658, post: 1727789, member: 29751&quot;]I don&#039;t think the pressure has anything to do with why they don&#039;t use the 3 piece collar on business strikes.&nbsp; My guess is that it is primarily because the coin output from a press striking coins with the multi-piece edge collar is much less per minute than a regular press with a single piece collar.&nbsp; The 3 piece collar has to &quot;retract&quot; or be opened after each strike before the next planchet can fall in and be struck.&nbsp; I don&#039;t know the exact rates, but I have read that set-ups of this type can mint between 80-100 coins per minute (<b>about 5,000 - 6,000 coins per hour</b>).</p><p><br /></p><p>For business strikes they use a smooth one-piece collar, strike the coin as usual, and the edge lettering is applied after the coin is struck by a very high throughput Schuler Edge Lettering Machine.&nbsp; A regular press c<a href="http://www.usmint.gov/kids/teachers/lessonPlans/viewLP.cfm?lessonPlanId=91" target="_blank" class="externalLink ProxyLink" data-proxy-href="http://www.usmint.gov/kids/teachers/lessonPlans/viewLP.cfm?lessonPlanId=91" rel="nofollow">an mint 700 coins per minute</a> (about <b>42,000 per hour</b>).&nbsp; The Schuler Edge Lettering Machine can easily keep up with this, able add edge lettering <a href="http://www.schulergroup.com/major/us/technologien/produkte/muenztechnik_platine_randpraegemaschine_rs_50/Technik/index.html" target="_blank" class="externalLink ProxyLink" data-proxy-href="http://www.schulergroup.com/major/us/technologien/produkte/muenztechnik_platine_randpraegemaschine_rs_50/Technik/index.html" rel="nofollow">at 130,000 coins per hour</a>.&nbsp; As you can see, minting the coins in a two step process instead of the more time-intensive three piece collar method means that production can be increased by approximately 7-fold.</p><p><br /></p><p><u><b>Example calculation:</b></u></p><p><br /></p><p>To mint 130,000 presidential dollars in 1 hour you would need:</p><p><br /></p><p>1.&nbsp; <b><span style="color: #0000ff">4 regular dies (and press[es]) and 1 Schuler Edge Lettering Machine</span></b></p><p><br /></p><p>&nbsp;&nbsp; &nbsp; OR</p><p><br /></p><p>2.&nbsp; <b><span style="color: #ff0000">22 multi-piece edge collar dies (and press[es])</span></b>[/QUOTE]</p><p><br /></p>

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