# US 5,346,654 A · Mehod of forming indicia on compact disks and indicia-bearing compact disks > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 5,346,654 A - Document ID: US5346654A - Status: Granted - Kind: A - Application number: 07/923,033 - Filed: 1992-07-31 - Granted: 1994-09-13 - Earliest claimed: 1992-07-31 - Assignees: Sanyo Laser Products, Inc. - Inventors: Ichiro Kodaka; Shoji Ishida; Charles Plumer - Web page: https://patentgrep.com/patent/US5346654A ## CPC - B29C 33/3857: {by making impressions of one or more parts of models, e.g. shaped articles and including possible subsequent assembly of the parts} - B29C 45/372: {provided with means for marking or patterning, e.g. numbering articles} - G11B 7/24: Record carriers characterised by shape, structure or physical properties, or by the selection of the material (characterised by the arrangement of information on the carrier G11B7/007) - G11B 7/26: Apparatus or processes specially adapted for the manufacture of record carriers - B29L 2017/005: {CD''s, DVD''s} - B29C: SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING (making preforms B29B11/00; making laminated products by combining previously unconnected layers which become one product whose layers will remain together B32B37/00 - B32B41/00) - G11B: INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER (recording measured values in a way that does not require playback through a transducer G01D9/00; recording or playback apparatus using mechanically marked tape, e.g. punched paper tape, or using unit records, e.g. punched or magnetically marked cards G06K; transferring data from one type of record carrier to another G06K1/18; circuits for coupling output of reproducer to radio receiver H04B1/20; gramophone pick-ups or like acoustic electromechanical transducers or circuits therefor H04R) - B29L: INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES ## Abstract A new compact disk ("CD") is formed providing a bright, metallic presentation of indicia such as trademarks, promotion and advertising copy and other alphanumeric information around the circumference of the disk with recorded digital data in the disk's central portion. Such a CD may be a 120 mm CD including a central portion recorded in the 80 mm format of a single CD, with the desired indicia formed by a bright metal indicia-bearing substrate in the 20 mm, radially-extending, circumferential portion of the CD that surrounds the recorded digital data. Such CD's are manufactured by recording the digital data in the central 80 mm of a 120 mm master, leaving the remaining unrecorded circumferential portion of the master with a smooth surface and applying the desired indicia onto the unrecorded outer peripheral portion of a disk used to form production stampers. ## Claims ### Claim 1 In a method of manufacturing a CD, the improvement comprising: providing a master having an outer diameter of 120 mm; limiting the recordation of digital data to the central 80 mm of the master; providing a stamper from said master including a smooth and unrecorded outer peripheral portion and a central portion for forming recorded digital data on the CD; producing a mother from said stamper including a smooth and unrecorded peripheral portion and a central portion formed with such recorded digital data; placing a desired indicia on the smooth and unrecorded peripheral portion of the mother; and producing production tooling from the resulting mother. ### Claim 2 (depends on 1) The improved method of claim 1 wherein the desired indicia is applied to the smooth and unrecorded peripheral portion of the mother by silk-screening. ### Claim 3 (depends on 2) The improved method of claim 2 wherein the desired indicia is formed on the smooth and unrecorded peripheral portion of the disk by silver ink. ### Claim 4 (depends on 3) The improved method of claim 3 wherein the mother is washed only in water following silk-screening of the desired indicia onto the smooth and unrecorded peripheral portion of the disk. ### Claim 5 (depends on 4) The improved method of claim 4 wherein the mother is placed wet into an electroforming bath to be plated with nickel to manufacture a production stamper prior to drying. ### Claim 6 In a method of manufacturing a CD, the improvement comprising the steps of limiting recordation of digital data to a central portion of a disk to provide a recorded disk with a smooth and unrecorded peripheral portion, placing desired indicia on the unrecorded peripheral portion of the recorded disk, and thereafter producing a production tooling for the manufacturing of a CD from the disk which is adapted to display the desired indicia. ### Claim 7 (depends on 6) The improvement of claim 6 further comprising the steps of: providing a stamper from said recorded disk including an unrecorded outer peripheral portion and a central portion for forming recorded digital data on the CD; producing a mother from said stamper including an unrecorded peripheral portion and a central portion formed with such recorded digital data; placing the desired indicia on the unrecorded peripheral portion of the mother; and producing a production tooling from the resulting mother. ### Claim 8 (depends on 7) The improved method of claim 7 wherein the desired indicia is applied to the smooth and unrecorded peripheral portion of the mother after a protective cover is applied over the central portion. ### Claim 9 (depends on 7) The improved method of claim 7 wherein the desired indicia is formed on the smooth and unrecorded peripheral portion of the disk by silk-screening with silver ink. ### Claim 10 (depends on 9) The improved method of claim 9 wherein the mother is washed only in water following silk-screening of the desired indicia onto the smooth and unrecorded peripheral portion of the disk. ### Claim 11 (depends on 9) The improved method of claim 9 wherein the mother is placed wet into an electroforming bath to be plated with nickel to manufacture a production stamper prior to drying.