US3833990A - Method of making a precious metal postage stamp - Google Patents

Method of making a precious metal postage stamp Download PDF

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Publication number
US3833990A
US3833990A US00433522A US43352274A US3833990A US 3833990 A US3833990 A US 3833990A US 00433522 A US00433522 A US 00433522A US 43352274 A US43352274 A US 43352274A US 3833990 A US3833990 A US 3833990A
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Prior art keywords
precious metal
beating
sheet
metal
making
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US00433522A
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M Boccard
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
    • B23P13/00—Making metal objects by operations essentially involving machining but not covered by a single other subclass
    • B23P13/02—Making metal objects by operations essentially involving machining but not covered by a single other subclass in which only the machining operations are important
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B3/00—Rolling materials of special alloys so far as the composition of the alloy requires or permits special rolling methods or sequences ; Rolling of aluminium, copper, zinc or other non-ferrous metals
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M1/00—Inking and printing with a printer's forme
    • B41M1/24—Inking and printing with a printer's forme combined with embossing
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49789—Obtaining plural product pieces from unitary workpiece
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/4998—Combined manufacture including applying or shaping of fluent material
    • Y10T29/49982—Coating
    • Y10T29/49986—Subsequent to metal working
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/12—All metal or with adjacent metals
    • Y10T428/12389—All metal or with adjacent metals having variation in thickness
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/12—All metal or with adjacent metals
    • Y10T428/12493—Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, joint, etc.]
    • Y10T428/12535—Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, joint, etc.] with additional, spatially distinct nonmetal component
    • Y10T428/12556—Organic component
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/12—All metal or with adjacent metals
    • Y10T428/12493—Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, joint, etc.]
    • Y10T428/12639—Adjacent, identical composition, components
    • Y10T428/12646—Group VIII or IB metal-base
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
    • Y10T428/24802—Discontinuous or differential coating, impregnation or bond [e.g., artwork, printing, retouched photograph, etc.]
    • Y10T428/24917—Discontinuous or differential coating, impregnation or bond [e.g., artwork, printing, retouched photograph, etc.] including metal layer

Definitions

  • stamps produced according to the method of the invention can be very finely worked with an intricate design without any cracks or holes appearing in the metal.
  • the method by which this is accomplised includes the steps of alternately laminating sheets of precious metal in different rolling-mills and hand beating the laminated sheets with one or more hammers. This beating is carried out in a trapezoidal pattern, i.e., one or more hammers are moved along a trapezoidal path during the manual beating operation. This manner of beating influences the structure of the sheet giving it great flexibility.
  • the processed sheets which may vary in thickness from between 0.05 mm to 0.20 mm, are then coated with glue, stamped out and divided into stamps of a predetermined size.
  • the desired stamp color e.g., pale yellow, lemon color, pale green, dark green, etc.
  • the mixture is heated to 1200 C or 1300 C and a new ingot is made which will measure, for example, 15 cm in length, 35 cm in width and 0.7 cm or 0.8 cm in thickness.
  • the ingot is passed through a first rolling mill, is heated again to effect softening and is then laminated a second time.
  • the ribbon of gold lengthens by 4 to 6 meters each time it goes through the rolling mill and the process is continued until the ribbon is 17 to 18 meters long.
  • the metal ribbon is then folded into 16 equal parts and fed into a third rolling mill which cuts it up into squares measuring 10 cm on each side. Cut into four pieces, the sheets of gold are placed one at a time between the pages of some sort of notebook. The relative thickness of the sheet, measured in lengths of milimeters is sufficient to allow it to be rough-rolled into squares of 10 cm by 10 cm.
  • the sheets of gold are hand beaten with one or more hammers to give the required flexibility.
  • a plurality of hammers weighing 3,250 kg, 6.500 kg and 9 kg, respectively, are used to beat the sheets of gold.
  • the gold is alternately heated, beaten again, and heated again.
  • the strokes of the hammer must be carefully applied with the desired force in a wedge shape or, more precisely, in a trapezoidal pattern (i.e., in the form of a swallows tail).
  • This type of beating produces a molecular arrangement in the metal resulting in the exact structure necessary for excellent flexibility.
  • the metal sheets will be suitable for making postage stamps.
  • these terms refer to the fact that the beating is carried out such that the hammers are moved along a trapezoidal path during the beating operation.
  • the beating may first be carried out in a direction corresponding to a parallel side of a trapezoid. The beating then continues in a direction corresponding to one of the inclined sides of the trapezoid and thence, in a direction corresponding to the other parallel side. Finally, the beating is carried out in the direction of the other inclined side, whereupon the starting point will be reached.
  • the gold sheets thus obtained vary in thickness between 0.05 mm and 0.20 mm.
  • the gold beater works the sheet once more before it undergoes the stamping process which gives it its final aspect.
  • the stamping which, for example, may produce a design in relief causes tensions in the metal, and this is the reason why it is extremely important that the metal be very flexible and pliable in order to avoid cracking or breaking.
  • the sheet is stamped either into single stamps or into a block of several stamps. All that remains to be carried out is the perforation, the number of perforaof distinguished individuals or in commemoration of the anniversaries or dates of independence of certain countries.
  • a method of making a postage stamp of precious metal comprising the steps of:
  • the laminated sheet is heated after each beating step.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Adornments (AREA)
  • Laminated Bodies (AREA)

Abstract

A method of making precious metal postage stamps which can be very finely worked in intricate designs without creating any cracks or holes in the metal. The method includes the steps of laminating a precious metal sheet in a plurality of different rolling-mills, manually beating the laminated sheet with a hammer, this beating being carried out such that one or more hammers are moved along a trapezoidal path during the beating operation, coating one side of the sheet with an adhesive agent and forming a relief design in the sheet.

Description

nited States Patent 1191 11] 3,833,990 Boccard Sept. 10, 1974 METHOD OF MAKING A PRECIOUS 1,103,222 7/1914 Rauskolb 161/213 x METAL POSTAGE STAMP FOREIGN PATENTS OR APPLICATIONS [76] Inventor: Madeleine Boccard, 25 rue de 19,821 8/1898 Great Britain .L 29/199 lArquebruse CPI-1204, Geneve, Switzerland Primary Examiner-Charles W. Lanham Assistant Examiner-D. C. Reiley, Ill
[22] Ffled' 1974 Attorney, Agent, or Firm-Raymond A. Robic; Arthur [2l] Appl. No.: 433,522 Schwartz; Peter G. Mack 1 Related US. Application Data [63] Continuation-impart of Ser. No. 246,524, April 24, [57] ABSTRACT 1972, abandoned A method of making precious metal postage stamps which can be very finely worked in intricate designs [52 US. Cl 29/412, 29/199, 29/5274, without creating y cracks or holes in the metal- The 72/7 161/213 method includes the steps of laminating a precious 51 im. c1. 823p 17/00 metal Sheet in a plurality of different rolling-mills, 58 Field of Search 29/199, 527.4, 412; 72/76; manually b g the laminated sheet with a hammer, 15 277 3 4 33 1 1/213 this beating being carried out such that one or more hammers are moved along a trapezoidal path during 5 R f e i d the beating operation, coating one side of the sheet UNITED STATES PATENTS with an adhesive agent and forming a relief design in 146,001 12/1873 Hastings 29/199 the Sheet 597,012 1/1898 Michalk 29/199 x v3 Claims, N0 Drawings METHOD OF MAKDJG A PRECIOUS WTAL CROSS REFERENCE TO RELATED APPLICATION This is a continuation-in-part application of copending US. application Ser. No. 246,524, Madeleine Boccard, filed Apr. 24, 1972, now abandoned.
BACKGROUND OF THE INVENTION SUMMARY OF THE INVENTION The present invention proposes a method of manufacture of an unbreakable postage stamp of extreme flexibility. Stamps produced according to the method of the invention can be very finely worked with an intricate design without any cracks or holes appearing in the metal. The method by which this is accomplised includes the steps of alternately laminating sheets of precious metal in different rolling-mills and hand beating the laminated sheets with one or more hammers. This beating is carried out in a trapezoidal pattern, i.e., one or more hammers are moved along a trapezoidal path during the manual beating operation. This manner of beating influences the structure of the sheet giving it great flexibility. The processed sheets, which may vary in thickness from between 0.05 mm to 0.20 mm, are then coated with glue, stamped out and divided into stamps of a predetermined size.
DETAILED DESCRIPTION In the process of the present invention bars or slabs of precious metal, e.g., gold, are transformed into fine sheets. To do this, machines for laminating precious metal are used. In themselves, however, existing machines are unsuitable in the field of precious metal postage stamp production, since such machines do not confer to the metal sheets the extreme flexibility, which is necessary. It is for this reason that manual labor is used to give the sheets of precious metal their essential flexibility.
The procedure described hereafter specifies a sheet of gold, however the same method can be applied to other precious metals such as platinum and silver.
To an ingot of pure gold are added copper, nickel and silver in proportions calculated to give the desired stamp color; e.g., pale yellow, lemon color, pale green, dark green, etc. The mixture is heated to 1200 C or 1300 C and a new ingot is made which will measure, for example, 15 cm in length, 35 cm in width and 0.7 cm or 0.8 cm in thickness. After re-heating, the ingot is passed through a first rolling mill, is heated again to effect softening and is then laminated a second time. The ribbon of gold lengthens by 4 to 6 meters each time it goes through the rolling mill and the process is continued until the ribbon is 17 to 18 meters long. The metal ribbon is then folded into 16 equal parts and fed into a third rolling mill which cuts it up into squares measuring 10 cm on each side. Cut into four pieces, the sheets of gold are placed one at a time between the pages of some sort of notebook. The relative thickness of the sheet, measured in lengths of milimeters is sufficient to allow it to be rough-rolled into squares of 10 cm by 10 cm.
From this stage on, machines can no longer be used. Instead, the sheets of gold are hand beaten with one or more hammers to give the required flexibility. Preferably, a plurality of hammers weighing 3,250 kg, 6.500 kg and 9 kg, respectively, are used to beat the sheets of gold. After each beating operation the gold is alternately heated, beaten again, and heated again. During the heating process the workman places the gold on a flat granite slab. The strokes of the hammer must be carefully applied with the desired force in a wedge shape or, more precisely, in a trapezoidal pattern (i.e., in the form of a swallows tail). This type of beating produces a molecular arrangement in the metal resulting in the exact structure necessary for excellent flexibility. Thus, the metal sheets will be suitable for making postage stamps.
In the foregoing description of the beating operation, it is to be understood that the expressions wedge shape and trapezoidial pattern do not refer to the shape of the indentations left by each hammer stroke.
Rather, these terms refer to the fact that the beating is carried out such that the hammers are moved along a trapezoidal path during the beating operation. For example, the beating may first be carried out in a direction corresponding to a parallel side of a trapezoid. The beating then continues in a direction corresponding to one of the inclined sides of the trapezoid and thence, in a direction corresponding to the other parallel side. Finally, the beating is carried out in the direction of the other inclined side, whereupon the starting point will be reached.
The gold sheets thus obtained vary in thickness between 0.05 mm and 0.20 mm. The gold beater works the sheet once more before it undergoes the stamping process which gives it its final aspect. The stamping which, for example, may produce a design in relief causes tensions in the metal, and this is the reason why it is extremely important that the metal be very flexible and pliable in order to avoid cracking or breaking. Heretofore it has not been possible to attain the proper metal characteristics by practicable, known methods.
Applicant has discovered, however, that by using the abovedescribed beating process the problems experienced in known methods of precious metal stamp production are overcome. Specifically, the above described beating process alters the structure of the precious metal sheets such that a detailed relief design can be applied thereto without the formation of cracks or small holes.
If the formation of the final, relief design is carried out (by, for example, coining, pressing or deep embossing) after the lamination step and without the above described beating process, small holes or cracks in the stamp will result. This is so because, after lamination, the sheet of precious metal is subject to numerous internal stresses, and it exhibits uneven thicknesses and a lack of flexibility. As such, the sheet is not adapted to sustain an additional operation which would create substantial new stresses.
The applicant has discovered that the above described process of manually beating the metal in a trapezoidal pattern is particularly effective in relieving the stresses and in producing a precious metal sheet which is uniform and flexible. The resulting sheet, then, is ideally suited for a final coining or embossing step which can be performed without the usual formation of cracks and/or holes.
When the sheets of gold, silver or platinum have attained the correct thickness and flexibility, they are then coated with glue. This glue is applied from a sheet of gummed paper with the result that the reverse side of the metal is adhesive in exactly the same manner as an ordinary paper postage stamp.
Next, the sheet is stamped either into single stamps or into a block of several stamps. All that remains to be carried out is the perforation, the number of perforaof distinguished individuals or in commemoration of the anniversaries or dates of independence of certain countries.
What is claimed:
1. A method of making a postage stamp of precious metal comprising the steps of:
a. laminating the precious metal in rolling mills to form a precious metal sheet;
b. manually beating the precious metal sheet with a hammer, the beating being carried out such that the hammer is moved along a trapezoidal path during the beating;
c. coating one side of the precious metal sheet with an adhesive agent; and
d. forming a relief design in the precious metal sheet.
2. A method as defined in claim 1 wherein the precious metal sheet is cut into a plurality of postage tions being indicated by the customer. The edges of Stamps after formation of the relief design each stamp may also turned back in a roof-like slope.
3. A method as defined in claim 1 wherein: a. the beating step is carried out more than once; and
b. the laminated sheet is heated after each beating step.

Claims (3)

1. A method of making a postage stamp of precious metal comprising the steps of: a. laminating the precious metal in rolling mills to form a precious metal sheet; b. manually beating the precious metal sheet with a hammer, the beating being carried out such that the hammer is moved along a trapezoidal path during the beating; c. coating one side of the precious metal sheet with an adhesive agent; and d. forming a relief design in the precious metal sheet.
2. A method as defined in claim 1 wherein the precious metal sheet is cut into a plurality of postage stamps after formation of the relief design.
3. A method as defined in claim 1 wherein: a. the beating step is carried out more than once; and b. the laminated sheet is heated after each beating step.
US00433522A 1972-04-24 1974-01-15 Method of making a precious metal postage stamp Expired - Lifetime US3833990A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL1018945C2 (en) * 2001-09-13 2003-03-14 Konink Nl Munt N V Object of value as well as method for manufacturing thereof.
US20170036480A1 (en) * 2015-08-05 2017-02-09 John Kent Lee Precious metal sheet display and method of manufacturing

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US146001A (en) * 1873-12-30 Improvement in the manufacture of gold-leaf for book-binders use
US597012A (en) * 1898-01-11 Gildersj leaf and method of making same
GB189819821A (en) * 1898-09-19 1898-11-19 Thomas Megson Langstone An Improved Feeding Device for Weighing Machines.
US1103222A (en) * 1913-04-17 1914-07-14 Fred W Rauskolb Mounting for gold-leaf.

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US146001A (en) * 1873-12-30 Improvement in the manufacture of gold-leaf for book-binders use
US597012A (en) * 1898-01-11 Gildersj leaf and method of making same
GB189819821A (en) * 1898-09-19 1898-11-19 Thomas Megson Langstone An Improved Feeding Device for Weighing Machines.
US1103222A (en) * 1913-04-17 1914-07-14 Fred W Rauskolb Mounting for gold-leaf.

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL1018945C2 (en) * 2001-09-13 2003-03-14 Konink Nl Munt N V Object of value as well as method for manufacturing thereof.
WO2003022597A1 (en) * 2001-09-13 2003-03-20 Koninklijke Nederlandse Munt N.V. Object of value and method of its production
US20170036480A1 (en) * 2015-08-05 2017-02-09 John Kent Lee Precious metal sheet display and method of manufacturing
US10144197B2 (en) * 2015-08-05 2018-12-04 John Kent Lee Precious metal sheet display and method of manufacturing

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