CA1009960A - Trapezoidal smooth grooves for video disc - Google Patents

Trapezoidal smooth grooves for video disc

Info

Publication number: CA1009960A
Authority: CA; Canada
Prior art keywords: video disc; smooth grooves; trapezoidal smooth; trapezoidal; grooves
Prior art date: 1973-02-09
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.): Expired

Application number

CA191,967A

Inventor

Leonard P. Fox

Richard W. Nosker

Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)

RCA Corp

Original Assignee

RCA Corp

Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)

1973-02-09

Filing date

1974-02-07

Publication date

1977-05-10

1974-02-07 Application filed by RCA Corp filed Critical RCA Corp

1977-05-10 Application granted granted Critical

1977-05-10 Publication of CA1009960A publication Critical patent/CA1009960A/en

Status Expired legal-status Critical Current

Links

Classifications

- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B11/00—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor
- G11B11/12—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by optical means
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B3/00—Recording by mechanical cutting, deforming or pressing, e.g. of grooves or pits; Reproducing by mechanical sensing; Record carriers therefor
- G11B3/68—Record carriers
- G11B3/70—Record carriers characterised by the selection of material or structure; Processes or apparatus specially adapted for manufacturing record carriers
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B3/00—Recording by mechanical cutting, deforming or pressing, e.g. of grooves or pits; Reproducing by mechanical sensing; Record carriers therefor
- G11B3/68—Record carriers
- G11B3/72—Groove formations, e.g. run-in groove, run-out groove
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B9/00—Recording or reproducing using a method not covered by one of the main groups G11B3/00 - G11B7/00; Record carriers therefor

CA191,967A 1973-02-09 1974-02-07 Trapezoidal smooth grooves for video disc Expired CA1009960A (en)

Applications Claiming Priority (1)

Application Number	Priority Date	Filing Date	Title
US331235A US3882214A (en)	1973-02-09	1973-02-09	Trapezoidal smooth grooves for video disc

Publications (1)

Publication Number	Publication Date
CA1009960A true CA1009960A (en)	1977-05-10

Family

ID=23293140

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
CA191,967A Expired CA1009960A (en)	1973-02-09	1974-02-07	Trapezoidal smooth grooves for video disc

Country Status (8)

Country	Link
US (1)	US3882214A (en)
JP (1)	JPS5123885B2 (en)
CA (1)	CA1009960A (en)
DE (1)	DE2406365C3 (en)
FR (1)	FR2217755B1 (en)
GB (1)	GB1452975A (en)
IT (1)	IT1007223B (en)
NL (1)	NL7401480A (en)

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
JPS5177680U (en) *	1974-12-16	1976-06-18
US4007295A (en) *	1975-07-28	1977-02-08	Rca Corporation	Olefin-SO2 copolymer film adhesion to a substrate
US4206256A (en) *	1975-08-21	1980-06-03	Rca Corporation	Metallized video disc having an insulating layer thereon
FR2397931A1 (en) *	1977-07-22	1979-02-16	Thomson Brandt	PROCESS FOR REPRODUCING AN INFORMATION MEDIA DISC AND DISC OBTAINED BY SUCH A PROCESS
US4408319A (en) *	1978-07-15	1983-10-04	Pioneer Electronic Corporation	Optical information recording mother disc and method of producing the same
US4582885A (en) *	1978-07-20	1986-04-15	Minnesota Mining And Manufacturing Company	Shaped plastic articles having replicated microstructure surfaces
US4297312A (en) *	1980-02-04	1981-10-27	Rca Corporation	Method for preparing stylus lapping discs
US4519065A (en) *	1980-09-22	1985-05-21	Minnesota Mining And Manufacturing Company	Metallized information carrying discs
US4363844A (en) *	1980-09-22	1982-12-14	Lewis Terry W	Metallized information carrying discs
US4376087A (en) *	1981-05-26	1983-03-08	Rca Corporation	Processing of video discs
JPS60120702U (en) *	1984-01-25	1985-08-15	株式会社　日研工作所	Part-Time Job
US5026510A (en) *	1988-03-17	1991-06-25	Canon Kabushiki Kaisha	Mold for cast molding substrate having preformat with information pits and method of using same
US5324188A (en) *	1989-12-19	1994-06-28	Canon Kabushiki Kaisha	Roller stamper for molding a substrate sheet to become an information recording medium

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
US3010153A (en) *	1959-03-12	1961-11-28	Gulton Ind Inc	Construction of paraboloid surfaces
US3795534A (en) *	1972-04-19	1974-03-05	Rca Corp	Manufacture of video discs

1973
- 1973-02-09 US US331235A patent/US3882214A/en not_active Expired - Lifetime
1974
- 1974-02-01 IT IT20122/74A patent/IT1007223B/en active
- 1974-02-04 NL NL7401480A patent/NL7401480A/xx not_active Application Discontinuation
- 1974-02-05 GB GB519274A patent/GB1452975A/en not_active Expired
- 1974-02-07 CA CA191,967A patent/CA1009960A/en not_active Expired
- 1974-02-08 JP JP49016153A patent/JPS5123885B2/ja not_active Expired
- 1974-02-08 FR FR7404402A patent/FR2217755B1/fr not_active Expired
- 1974-02-11 DE DE2406365A patent/DE2406365C3/en not_active Expired

Also Published As

Publication number	Publication date
JPS5123885B2 (en)	1976-07-20
DE2406365B2 (en)	1978-03-23
DE2406365A1 (en)	1974-08-15
DE2406365C3 (en)	1978-11-23
NL7401480A (en)	1974-08-13
IT1007223B (en)	1976-10-30
GB1452975A (en)	1976-10-20
JPS49114401A (en)	1974-10-31
FR2217755B1 (en)	1977-09-16
US3882214A (en)	1975-05-06
AU6516474A (en)	1975-08-07
FR2217755A1 (en)	1974-09-06

Publication	Publication Date	Title
JPS5750342A (en)	1982-03-24	Video disc
CA1000217A (en)	1976-11-23	Disc brake
CA1004159A (en)	1977-01-25	Disk type brake
AU501392B2 (en)	1979-06-21	Electro-capacitive video recording
CA1009960A (en)	1977-05-10	Trapezoidal smooth grooves for video disc
CA997285A (en)	1976-09-21	Disc brake
CA1030657A (en)	1978-05-02	Electrostatic video disc pick-up
CA1025107A (en)	1978-01-24	Precision drive for video disc recorder
CA998857A (en)	1976-10-26	Frictional transmission drive
CA1031867A (en)	1978-05-23	Video disc playback apparatus
CA999371A (en)	1976-11-02	Video encription system
CA1003563A (en)	1977-01-11	Magnetic recording playback system
CA995029A (en)	1976-08-17	Twin drive system
CA1031271A (en)	1978-05-16	Fluid cushion turntable for video disc player
CA999530A (en)	1976-11-09	Smooth grooves for information storing discs
CA1010990A (en)	1977-05-24	Video tape recording animation system
CA999813A (en)	1976-11-16	Record reproducing system
CA991058A (en)	1976-06-15	Friction block for lever
AU486804B2 (en)	1975-08-07	Trapezoidal smooth grooves for videodisc
GB1441839A (en)	1976-07-07	Video recording
AU488810B2 (en)	1975-10-09	Video disc playback apparatus
CA980693A (en)	1975-12-30	Video disc cutterhead
AU478311B2 (en)	1975-07-24	Smooth grooves for information storing discs
AU483200B2 (en)	1975-11-06	Disk type brake
CA1035291A (en)	1978-07-25	Disk brakes