US3837656A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Chip removal in the mastering of fine-grooved discs
Assignee: RCA Corp
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Filing: 1973-03-12
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Granted: 1974-09-24
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Expires: 1993-03-12
Abstract
Abstract A system for removing chips cut away from a video disc master utilizes a stream of tempered air to direct the chips towards a vacuum orifice which in turn carries these chips off the disc.
Inventors
- 👤 M Pradervand
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 13:48
CPC Classifications
B; B23; B23Q; B23Q11/00; B23Q11/0042; B23Q11/006
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
140 words
Apparatus for cutting a groove in an information-storing disc comprising: a turntable adapted for rotationally carrying an informationstoring disc; means for cutting a spiral depression in the disc; a fluid outlet adjacent said cutting means; means for supplying fluid via said outlet to impinge upon the disc and cutting means at the contact area thereof; a first heating means coupled to said means for supplying fluid for heating said fluid; a second heating means coupled to said cutting means for elevating the temperature of said cutting means in accordance with the melting temperature of the material in which said spiral groove is cut; and collecting means disposed adjacent said cutting means aligned with said outlet and adapted for accumulating and removing portions of the disc material removed by said cutting means and directed by said fluid towards said collecting means.
Claim 2
Dependent Claim
140 words
Apparatus for cutting a groove in an information-storing disc comprising: a turntable adapted for rotationally carrying an informationstoring disc; means for cutting a spiral depression in the disc; a fluid outlet adjacent said cutting means; means for supplying fluid via said outlet to impinge upon the disc and cutting means at the contact area thereof; a first heating means coupled to said means for supplying fluid for heating said fluid; a second heating means coupled to said cutting means for elevating the temperature of said cutting means in accordance with the melting temperature of the material in which said spiral groove is cut; and collecting means disposed adjacent said cutting means aligned with said outlet and adapted for accumulating and removing portions of the disc material removed by said cutting means and directed by said fluid towards said collecting means.
Claim 3
Dependent Claim
38 words
Apparatus according to claim 1 wherein: said means for cutting a spiral depression includes a stylus arranged in accordance with said turntable for traversing a radial of said turntable at a predetermined speed with respect to turntable velocity.
Claim 4
Dependent Claim
38 words
Apparatus according to claim 1 wherein: said means for supplying fluid includes a source of air coupled to said fluid outlet for directing said portions of said disc material removed by said cutting means towards said collecting meaNs.
Claim 5
Dependent Claim
43 words
Apparatus according to claim 3 wherein: said first heating means is adjusted to elevate the temperature of air supplied by said means for supplying fluid to be greater than the ambient air and less than the temperature required to melt said disc material.
Claim 6
Dependent Claim
18 words
Apparatus according to claim 4 wherein: said fluid outlet adjacent said cutting means has an elliptical cross-sectional shape.
Claim 7
Dependent Claim
46 words
Apparatus according to claim 1 wherein: said collecting means includes a vacuum source coupled to a fluid inlet; and a chip collecting container interposed between said vacuum source and said fluid inlet for receiving and accumulating portions of said disc material removed by said cutting means.
Claim 8
Dependent Claim
23 words
Apparatus according to claim 6 wherein: said collecting means disposed adjacent said cutting means has a fluid inlet having an elliptical cross-sectional shape.
Claim 9
Dependent Claim
19 words
Apparatus according to claim 7 wherein: vacuum adjusting means is coupled between said fluid inlet and said vacuum source.
Claim 10
Dependent Claim
63 words
Apparatus according to claim 8 wherein: said vacuum adjusting means comprises a first vacuum carrying conduit coupled to said vacuum source; a second vacuum conduit coupled to said fluid inlet, said second conduit having an outside diameter of said first conduit; and said first conduit adapted for receiving a predetermined length of said second conduit for adjusting the vacuum at said fluid inlet.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-09-23 | 1978-03-25 | 1978-09-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-23 | 1982-03-25 | 1982-09-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-23 | 1986-03-25 | 1986-09-24 | $7700.00 | Window Closed / Lapsed |