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    striking pressure

    From Mine To Mint

    /2013

    Very few toggle presses suffered structural failures.^* In 1896 striking pressure for gold coins was reported as: $20, 175 tons; $10, 120 tons; $5, 75 tons; and $2.50, 40 tons. In 1922 similar but

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    From Mine To Mint

    /2013

    Very few toggle presses suffered structural failures.^* In 1896 striking pressure for gold coins was reported as: $20, 175 tons; $10, 120 tons; $5, 75 tons; and $2.50, 40 tons. In 1922 similar but

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    John Reich Journal, July 2011

    1/7/2011

    I believe that this deterioration may be due to an increase in striking pressure designed to bring up the detail on a slightly wider rimmed coin. The result was a stronger strike on the periphery of

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    From Mine To Mint

    /2013

    Striking Pressurere not used until 1944 and did not enter into general production until about 1950. Striking pressure was reported i

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    MORE ON COIN STRIKING PRESSURE CALCULATIONS

    MORE ON COIN STRIKING PRESSURE CALCULATIONS

    06/13/2010

    MORE ON COIN STRIKING PRESSURE CALCULATIONS http://www.coinbooks.org/esylum_v13n24a13.html Last week Dick Hanscom asked: So here is my physics problem. I have built a "new and improved" (read

    Last week Dick Hanscom asked: So here is my physics problem. I have built a "new and improved" (rea

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    From Mine To Mint

    /2013

    Striking Pressurere not used until 1944 and did not enter into general production until about 1950. Striking pressure was reported i

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    United States Proof Coins 1936-1942

    /2017

    Striking pressure and diameter of blanks and planchets were flexible to allow for manufacture of the best product the dies could produce. (Specifications for silver dollars are included for

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    The Rich Uhrich Collection

    as the Philadelphia Mint struggled to get the right striking pressure to bring up the devices without cracking the dies. This was a function of the new nickel alloy foisted upon the coiners by

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    The C. B. Slade, Jr. Estate

    which shattered abruptly under the striking pressure to bring up the designs. Morgan soon fought for and received permission to lower the relief, and the 1922 Peace dollars are the result, with much

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    The March 2014 Baltimore Auction, U.S. Coins

    striking pressure (90 percent gold, 10 percent copper) must have still been problematic to get the striking pressure

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    N.O. W. News, August 1983

    1/8/1983

    This describes any improper striking pressure,, worn or weak dies, or plan- chet defects. Three catagor— ies are used, full, medium,, and weak strike quality. The final criteria, the steps on

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    Coinage Of The American Confederation Period (COAC #11)

    /1996

    inferior coin presses resulting in reduced and irreproducible striking pressure and improper annealing procedures during rolling, blanking, and before striking. To test this hypothesis let us consider

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    E-Gobrecht, vol. 5, no. 12

    1/12/2009

    and even small differences in position can change during die usage due to factors such as striking pressure, die wear, die polishing or re- work, and grade of the coin. It is not surprising that

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    E-Gobrecht, vol. 9, no. 10

    1/10/2013

    Apparently due to striking pressure, and/or die wear after the clash, even coins with similar strike characteristics and grade can have clash marks with notably different definition. Examples in lower

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    The Colonial Newsletter, no. 42

    1/12/1974

    Striking pressure appears to hove been relatively light. Second strike — Reverse remained centered on die os during first strike, and both obverse and reverse received full striking force. This

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    The Colonial Newsletter, no. 63

    1/7/1982

    It is generally believed that the rounded edge effect is a result of striking pressure; however, examination of specimens struck well off center indicate that this is not the case. 13. Forensic

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    The Colonial Newsletter, no. 75

    1/3/1987

    obtain greater life from the die by relieving the broken part of the die from some of the striking pressure. As a result, variety 9-87NY is virtually non-struck near the top of the obverse and on th

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    The Colonial Newsletter, no. 87

    1/1/1991

    Striking pressure, direction of strike (i.e., dies can be in the same, or slightly different, horizontal plane), planchet quality, all can affect the appearance of punches on struck coins. Other

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    The Colonial Newsletter, no. 93

    1/2/1993

    striking pressure and the softness of the copper blank determines the amount of radial expansion during striking and how well the metal flowed into the character on the die. Die and coin wear will als

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    The Colonial Newsletter, no. 94

    1/7/1993

    striking pressure and the softness of the copper blank determines the amount of radial expansion during striking and how well the metal flowed into the character on the die. Die and coin wear will als

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    The Colonial Newsletter, no. 118

    1/12/2001

    Such strikes wouldn’t have been made under full striking pressure, norwould they have been done with specially prepared flans. At least one of these two known specimens exhibits proof-like fields, but

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    The Colonial Newsletter, no. 145

    1/4/2011

    along with the striking pressure of the die and the hardness of the planchet. Much the same can be said of central device punches. The same obverse bust device found on two different specimens and in

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    The Colonial Newsletter, no. 148

    1/4/2012

    suggests that the missing legend there is due more to misaligned dies or to problems with striking pressure. The new specimen is in a later die state than the discovery coin, showing die failure

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    Gobrecht Journal #60

    15/7/1994

    as the dies start to wear from friction and striking pressure. As the dies lose their polished surfaces, the coins may tend to become more frosty or textured in appearance and some other types of die

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    Gobrecht Journal #81

    15/7/2001

    This occurred because the striking pressure was the lowest on the rims, the distance between the two dies being the 15

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    Gobrecht Journal #81

    15/7/2001

    The initial off center image was all but obliterated except on the rims where the striking pressure was the least. Steam power was introduced at the mint in 1 836 but this coin suggests that some of

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    Penny-Wise, Vol. 44, No. 6

    1/11/2010

    and the difference may be due to greater striking pressure or the different characteristics of the dies. The “open collar” in which these coins were struck meant “no collar"^.” Of the jobs done by

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    Penny-Wise, Vol. 46, No. 3

    1/7/2012

    the striking pressure was not always consistent, and some coins were weakly struck. Additionally, buckled or misaligned dies sometimes resulted in coins that are weakly struck in part, like the 1797

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    The MCA Advisory, December 2009

    1/12/2009

    Also consideration needs to be given to how the front will fit to the back when tons of striking pressure is applied. 14. Lastly, (unless you want boxes of unsold medals in your cellar) your audience

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    Journal of the Barber Coin Collectors' Society, vol. 12, no. 3

    1/9/2001

    This striking pressure takes its toll on the hard- ened steel die, causing cracks to appear.” The above photos show BCCS member #266, Ralph Vignola’s 1914-D dime with a crack through the date, one

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    Armenian Numismatic Journal, Series 1, Vol. 25, No. 1-4, and Bulletin No. 19B

    1/1/1999

    although in some cases they may appear faint due to variations in striking pressure. Careful examination of 42 well-preserved uncirculated examples of the cupronickel chess commemorative indicates tha

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    The Shekel, vol. 2, no. 1 (Spring 1969)

    /1969

    great- er striking pressure or any com- bination thereof. The field (the blank spaces) has a higher lus- ter with less grain than the regular issue. The edge is sharper (not sharp or wire) than the

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    The Shekel, vol. 5, no. 1 (Spring 1972)

    /1972

    greater striking pressure and polished dies, the ideal coin is an early- strike “frosty” proof, Q. I received my LMPG BU and uncirculated coins from AINA. One of them must be an error. On the lapel

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    Gobrecht Journal #84

    15/7/2002

    Perhaps the increased striking pressure afforded by the steam press was sufficient to create die crumbling in the larger dies but the lower pressure from the screw press did not normally cause such di

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    The TNA News, May-June 2014

    1/5/2014

    prepared planchets from polished dies on presses which run slower and apply a higher striking pressure than those used to make business strikes. This makes possible the extra detail, mirror

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    Penny-Wise, Vol. 10, No. 6(57)

    15/11/1976

    Because the striking pressure was a variable factor, it is necessary therefore, in examining the coins of that era today, to make allowances for the presumed variation from the standard, before one ca

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    From Mine To Mint

    /2013

    and the striking pressure caused planchet metal to flow into the detail of the dies. This created the inverse of the die image, and also work hardened the planchet so that the resulting coin was much

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    From Mine To Mint

    /2013

    silver dollars can be attributed to this cause when a combination of design relief and striking pressure did not obliterate all of the fine scratches. Figure 135. Examples of silver strip

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    From Mine To Mint

    /2013

    so striking pressure was largely a matter of die area and spacing. Thus, the number of cycles per minute was not directly related to the pressure of each strike. Coinage Presses - Philadelphia Mint,

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    Penny-Wise, Vol. 24, No. 3(138)

    15/5/1990

    striking pressure from the screw press of the early 1800s was not uniform. The variance between start and end of shift, especially if lunch included a taste of the infamous demon rum, should show up o

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    The Colonial Newsletter, no. 95

    1/10/1993

    The amount of flow was dependent upon striking pressure and planchet hardness. The impression near the edge of the planchet could be carried outward by this metal flow. If the metal flow was great

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    Penny-Wise, Vol. 28, No. 5(164)

    15/9/1994

    This then resulted in metal flow at K-3 from striking pressure producing a metal bulge at this location. Nevertheless, many planchets exists in Class III which are perfectly round, but not at this

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    The Brasher Bulletin

    1/9/2006

    the ceremonial press had been adjusted with a greater striking pressure to allow only three blows. The gold coins had been struck a few weeks earlier with a full run to fill existing orders. This was

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    American Numismatic Association Certification Services, 1983

    1/1/1983

    It ha 9 occurred to me that breaks may be weaker or may not show up if the striking pressure Is not as great. In other words, if a planchet is a little thinner or is hot, the die break should not show

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    Maryland TAMS Journal, Vol. 12, No. 3 (49)

    1/9/1991

    Differences in striking pressure often caused irregularities in the finished product when compared to hand engraving. The .land engraving section detailes the various methods and tools used to develop

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    American Numismatic Association Numismatic Terms Standardization Committee Correspondence and Ephemera, 1966

    /1966

    higher striking pressure and double striking. MINT LUSTER A brightness imparted on the surface of a coin by the striking die during the process of manufacture. This sheen disappears soon after the coi

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    American Numismatic Association Numismatic Terms Standardization Committee Correspondence and Ephemera, 1966

    /1966

    higher striking pressure and double striking. MINT LUSTER A brightness imparted on the surface of a coin by the striking die during the process of manufacture. This sheen disappears soon after the coi

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    American Numismatic Association Numismatic Terms Standardization Committee Correspondence and Ephemera, 1969

    /1969

    Slight flange on coins caused by excess striking pressure, generally characteristic of Proof coins (also KNIFE BDGB) and Proof Medals, but can appear on any struck coins from the given cause. WARNTCKS

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    TAMS Journal, Vol. 41, No. 3

    1/6/2001

    pro- bably due to striking pressure causing metal flow. Some of each metal appear in "bright uncirculated" condition. It is difficult to say whether this resulted from the pressure setting of the pres

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    E-Gobrecht, December 2016 (vol. 12, no. 12, whole no. 143)

    30/11/2016

    that such con- cave/convex features would not withstand the coining press immense striking pressure, but maybe in some small way contributes to the quality of strike seen in the resultant coin. justor

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