| Patents for B29L 17 - Carriers of records containing fine grooves or impressions, e.g. disc records for needle playback, cylinder records (579) |
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| 04/17/1990 | US4917833 Method of manufacturing information discs from a synthetic material by an injection molding device |
| 04/04/1990 | EP0361406A2 Injection molding machine |
| 04/04/1990 | EP0361305A2 Injection molding die apparatus for use in the production of substrate of optical disk |
| 03/13/1990 | US4908216 Lower mold part with disk shaped recess, upper mold part, clamp, upper part being transparent material which transmits rays |
| 02/28/1990 | EP0355589A2 Mold for molding optical disk base |
| 02/13/1990 | US4900242 Apparatus for injection molding articles |
| 11/14/1989 | US4880587 Process for production of an injected molded part |
| 11/07/1989 | US4879082 Method for molding plastic material into disk shaped sabstrate for an optical information record carrier |
| 10/31/1989 | US4877666 Magneto-optic substrates |
| 10/25/1989 | EP0338913A2 Injection molding process of a plastic substrate for an optical disk |
| 09/26/1989 | CA1259766A1 Method and apparatus for molding articles |
| 09/12/1989 | US4865898 With specific light transmittance and surface roughness |
| 08/22/1989 | CA1258562A1 Process and apparatus for the production of an injection molded part |
| 06/20/1989 | US4841501 Plastic substrate for optical disk and process for producing the same |
| 05/09/1989 | US4828769 Method for injection molding articles |
| 04/11/1989 | US4820467 Process for the punching and removing of the sprue in an injection molding tool |
| 02/15/1989 | EP0303086A2 Method of making a substrate for a magneto-optical recording layer, injection-moulding apparatus for making a substrate as well as substrate for a magneto-optical recording layer |
| 12/28/1988 | EP0296677A1 Injection moulding device for manufacturing discs from a synthetic material, and method of manufacturing information discs from a synthetic material by means of an injection moulding device |
| 12/06/1988 | US4789320 Stamper-holding apparatus for use in injection mold |
| 11/29/1988 | US4788015 Process for preparation of optical disk substrate |
| 11/29/1988 | CA1245415A1 Method for forming articles by injection molding |
| 11/15/1988 | CA1244614A1 Process and apparatus for the punching and removing of the sprue in an injection molding tool |
| 11/08/1988 | US4783041 Mold for molding optical disc |
| 11/01/1988 | US4781879 Method of making a magnetic recording disk |
| 10/11/1988 | CA1242855A1 Apparatus for the injection moulding of disc records |
| 09/20/1988 | US4772196 Molding apparatus for producing centrally-apertured discs |
| 05/03/1988 | US4741689 Injection mold for an optical disk |
| 04/19/1988 | US4738613 Apparatus for the production of an injection molded part |
| 04/12/1988 | US4737096 Injection mould with insert piece and injection moulding unit for same |
| 02/10/1988 | EP0255595A2 Method for producing moulded low-tension components |
| 02/09/1988 | US4723898 Small-sized and precision injection molding apparatus |
| 12/29/1987 | US4715806 Apparatus for the punching and removing of the sprue in an injection molding tool |
| 12/16/1987 | CN87104162A Method and apparatus for molding articles |
| 12/02/1987 | EP0247244A2 Improved molding apparatus and method for producing centrally-apertured discs |
| 11/17/1987 | US4707321 Without pressure; pressing movable die against stationary die |
| 11/11/1987 | EP0244783A2 Method and apparatus for molding articles |
| 09/09/1987 | EP0235800A2 Plastic substrate for optical disk and process for producing the same |
| 07/21/1987 | US4681527 Apparatus for the injection moulding of disc records |
| 07/07/1987 | US4679183 Sound recording apparatus for blank films and tapes |
| 06/03/1987 | EP0224312A1 Matrix |
| 05/06/1987 | EP0220725A2 Injection mold for an optical disk |
| 04/21/1987 | US4659407 Process for manufacturing optical disks by pressing |
| 02/04/1987 | EP0210475A2 Method and apparatus for manufacturing an injection-moulded object |
| 12/09/1986 | US4627809 Metal mold and stamper for injection molding of a plastic disc for a high-density information recording carrier |
| 07/30/1986 | CN85100814A Small-sized precision injection moulding apparatus |
| 06/10/1986 | CN85108449A Method for forming articles by injection molding |
| 05/21/1986 | EP0181590A2 Method and apparatus for punching and removing the sprue in an injection mould |
| 04/23/1986 | EP0178901A2 Methods of forming articles by injection moulding |
| 02/12/1986 | EP0170959A2 Sytem for duplicating sound recording grooves on films |
| 01/07/1986 | US4563145 Alternately heatable and coolable moulding block |
| 01/02/1986 | EP0166515A1 Apparatus for the injection moulding of disc records |
| 08/20/1985 | US4536416 Matrix and method of manufacturing articles of a synthetic resin by the matrix |
| 06/26/1985 | EP0146191A1 Alternately heatable and coolable moulding block |
| 04/17/1985 | EP0137246A2 Metal mold and stamper for injection molding of a plastic disc for a high-density information recording carrier |
| 01/09/1985 | EP0130900A1 Process for manufacturing optical discs by pressing, and discs made thereby |
| 10/31/1984 | EP0123334A1 Matrix and method of manufacturing articles of a synthetic resin by using the matrix |
| 06/26/1984 | CA1169611A1 Hot sprue sleeve valve assembly for an injection molding machine |
| 06/20/1984 | EP0111077A1 Device for heat-bonding utilizing temperature-controlled pressure |
| 06/05/1984 | CA1168408A1 Hot sprue valve assembly for an injection molding machine |
| 01/24/1984 | US4427353 Upright injection-compression pressing machine for the manufacture of information carrier discs |
| 01/10/1984 | CA1160009A1 Hot sprue valve assembly for an injection molding machine |
| 12/20/1983 | CA1158815A1 Hot sprue valve assembly for an injection molding machine |
| 07/19/1983 | US4394117 Hot sprue sleeve valve assembly for an injection molding machine |
| 07/05/1983 | US4391579 Hot sprue valve assembly for an injection molding machine |
| 03/30/1983 | EP0075043A2 Hot sprue valve assembly for an injection molding machine |
| 03/29/1983 | CA1143517A1 Apparatus for producing centrally apertured record discs |
| 02/08/1983 | US4372741 Hot sprue valve assembly for an injection molding machine |
| 12/15/1982 | EP0066649A2 Hot sprue sleeve valve assembly for an injection molding machine |
| 07/20/1982 | US4340353 Hot sprue valve assembly for an injection molding machine |
| 07/07/1982 | EP0055464A2 Injection molding machine for the manufacture of information carrier discs |
| 05/12/1982 | EP0051253A2 Hot sprue valve assembly for an injection molding machine |
| 05/12/1982 | EP0051252A2 Hot sprue valve assembly for an injection molding machine |
| 06/16/1981 | CA1102973A1 Method and means for replicating centrally apertured video disc records |
| 11/25/1980 | US4235136 Trimming disc records |
| 10/29/1980 | EP0018210A1 Moulding apparatus for record discs |
| 11/13/1979 | CA1066411A1 Video disc and method of making the same |
| 05/16/1979 | EP0001896A1 Trimming disc records |
| 12/19/1978 | US4130620 Photoresist |
| 11/07/1978 | US4124672 Replication utilizing a casting process |