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 Title: |
US5259907:
Method of making coded playing cards having machine-readable coding
[ Derwent Title ]
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| Country: |
US United States of America
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| Inventor: |
Soules, Jack A.; Shaker Heights, OH
Carpenter, Bryan D.; Cleveland, OH
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| Assignee: |
Technical Systems Corp., Cleveland, OH
other patents from TECHNICAL SYSTEMS CORP. (563225) (approx. 6)
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| Published / Filed: |
1993-11-09
/ 1992-12-01
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| Application Number: |
US1992000983973
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| IPC Code: |
Advanced:
A63F 1/02;
A63F 1/14;
A63F 9/06;
A63F 9/24;
IPC-7:
B32B 31/00;
B41M 31/00;
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| ECLA Code: |
A63F1/02; A63F1/14; K63F9/06C4; K63F9/24N2B; K63F9/24N2B1;
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| U.S. Class: |
Current:
156/277;
156/310;
273/293;
283/074;
283/079;
283/088;
283/089;
283/094;
283/901;
Original:
156/277;
156/310;
273/293;
283/074;
283/079;
283/088;
283/089;
283/094;
283/901;
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| Field of Search: |
156/277,310,67
283/074,79,87,88,94,901
273/292,293,295,296
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| Priority Number: |
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| Abstract: |
An apparently conventional playing card is invisibly coded so that it can only be read face down, by an electrooptic reading means. The card may be of non-laminated conventional card stock which has a substantially white surface conventionally printed with the identification of the suit and value of the card with inks chosen because they are visible but substantially transparent to wavelengths outside the visible range. The face of the card is coded with indicia inklessly marked across its surface with a compound which absorbs wavelengths (outside the visible range) which wavelengths are used by the reading means to read the indicia. The indicia, invisible to the human eye, correspond to a code which uniquely identifies the card. The card may be laminated from top and base sheets and the code concealed behind the front printed face of the top sheet. The upper surface of the top sheet is imprinted with the face value of the card with the inks described. The base sheet serves as a support layer, either for the indicia per se, or for an intermediate layer on which the indicia may be printed. The code is read because there is sufficient contrast between the transmitted and absorbed light in the wavelength used by the reading means. A coating or auxiliary layer may be provided to enhance the contrast.
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| Attorney, Agent or Firm: |
Lobo, Alfred D. ;
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| Primary / Asst. Examiners: |
Simmons, David A.; Mayes, M. Curtis
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| Maintenance Status: |
E2 Expired Check current status
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| INPADOC Legal Status: |
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Family Legal Status Report
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| Parent Case: |
This is a division of parent application Ser. No. 07/796,765 filed on Nov. 25, 1994, to be issued as U.S. Pat. No. 5,169,155 which is a continuation-in-part application of Ser. No. 07/501,148 filed Mar. 29, 1990, issued as U.S. Pat. No. 5,067,713.
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| Designated Country: |
BR CA EP HU JP OA RU BR EP HU JP OA PL SE SU DE FR GB
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| Family: |
Show 17 known family members
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First Claim:
Show all 17 claims |
We claim:
1. A method for making a laminated playing card, comprising,
- positioning first and second sheets of card stock of about equal dimensions, each about 5 mils thick, said first sheet having a front surface to be printed with insignia for the face value of said playing card, and said second sheet having a rear surface to be printed with a design,
- coating said first sheet's rear surface with a coating which absorbs or scatters visible light but transmits in wavelengths invisible to the human eye, depositing machine-readable coding indicia on said rear surface of said first sheet,
- coating said second sheet's front surface with a reflective coating,
- bonding together said first and second sheets in coated surface-to-coated surface contact to form laminated card stock, and, printing said front surface of said first sheet with said insignia in inks which absorb and reflect in the visible range to produce characteristic colors of said insignia, but which inks are substantially transparent to said wavelengths.
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| Background / Summary: |
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| Drawing Descriptions: |
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| Description: |
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| Forward References: |
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