US3752620A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for pressing objects out of thermoplastic material, and particularly phonographic disks
Assignee: Individual
•
Filing: 1971-10-18
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Granted: 1973-08-14
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Expires: 1991-10-18
Abstract
Abstract A press frame supports upper and lower plates having opposed surfaces with a pattern on each. The upper plate is secured to an ultrasonic vibration means, upward movement of which is resisted by resiliently flexible means. The lower plate is connected to a pressure fluid actuated device for urging, at a low or a high pressure, the lower plate against the upper plate when a plastic material is therebetween, thereby forming an impression in said material.
Inventors
- 👤 R Renoux
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:10
CPC Classifications
B; B29; B29C; B29C43/00; B29C43/02; B29L; B29L2017/00; B29L2017/001; B29L2017/003; Y; Y10; Y10S; Y10S425/00; Y10S425/81
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
410 words
An apparatus for pressing an object, such as a phonographic disc, from thermoplastic material, said apparatus comprising: frame means; first plate means movably mounted on said frame means for rectilinear movement relative thereto along a first line of movement, said first plate means having a first pressing face thereon; resilient means coacting between said frame means and said first plate means for normally resiliently urging said first plate means in a first direction for normally maintaining said first plate means in a predetermined position relative to said frame means; said frame means including abutment means normally spaced from first plate means and disposed for engagement by said first plate means when same is moved away from the predetermined position in a second direction which is opposite said first direction; high frequency vibrating means connected to said first plate means for permitting selected vibration thereof; second plate means movably mounted on said frame means for rectilinear movement relative thereto and relative to said first plate means along a second line of movement which is substantially parallel to said first line of movement, said second plate means having a second pressing face thereon which is normally disposed opposite but spaced from said first pressing face; fluid pressure cylinder means mounted on said frame means and coacting with said second plate means for moving same relative to said frame means toward said first plate means; and control means for supplying pressure fluid to said fluid cylinder means for causing linear movement of said second plate means toward and into engagement with said first plate means, whereby the opposed pressing faces are able to form an object therebetween, said control means initially supplying pressure fluid to said cylinder means at a first pressure level so that said second plate means moves into engagement with said first plate means and moves same away from said predetermined position in opposition to the urging of said resilient means so that the forces exerted on the first and second plate means by the cylinder means and the resilient means are substantially equalized, said control means then supplying pressure fluid to said cylinder means at a second pressure level which is substantially greater than said first pressure level for causing further displacement of said second plate means toward said first plate means for causing said first plate means to be moved into engagement with said abutment means for causing pressing of the material contained between the opposed pressing faces.
Claim 2
Independent Claim
410 words
An apparatus for pressing an object, such as a phonographic disc, from thermoplastic material, said apparatus comprising: frame means; first plate means movably mounted on said frame means for rectilinear movement relative thereto along a first line of movement, said first plate means having a first pressing face thereon; resilient means coacting between said frame means and said first plate means for normally resiliently urging said first plate means in a first direction for normally maintaining said first plate means in a predetermined position relative to said frame means; said frame means including abutment means normally spaced from first plate means and disposed for engagement by said first plate means when same is moved away from the predetermined position in a second direction which is opposite said first direction; high frequency vibrating means connected to said first plate means for permitting selected vibration thereof; second plate means movably mounted on said frame means for rectilinear movement relative thereto and relative to said first plate means along a second line of movement which is substantially parallel to said first line of movement, said second plate means having a second pressing face thereon which is normally disposed opposite but spaced from said first pressing face; fluid pressure cylinder means mounted on said frame means and coacting with said second plate means for moving same relative to said frame means toward said first plate means; and control means for supplying pressure fluid to said fluid cylinder means for causing linear movement of said second plate means toward and into engagement with said first plate means, whereby the opposed pressing faces are able to form an object therebetween, said control means initially supplying pressure fluid to said cylinder means at a first pressure level so that said second plate means moves into engagement with said first plate means and moves same away from said predetermined position in opposition to the urging of said resilient means so that the forces exerted on the first and second plate means by the cylinder means and the resilient means are substantially equalized, said control means then supplying pressure fluid to said cylinder means at a second pressure level which is substantially greater than said first pressure level for causing further displacement of said second plate means toward said first plate means for causing said first plate means to be moved into engagement with said abutment means for causing pressing of the material contained between the opposed pressing faces.
Claim 3
Dependent Claim
74 words
An apparatus according to claim 1, wherein said vibrating means comprises an ultra-sonic transducer having a portion thereof fixedly connected to said first plate means for causing high frequency vibration thereof when the first and second plate means are in engagement with another due to the presence of pressure fluid at said first pressure level within said cylinder means, said high frequency vibration causing heating of the material disposed between the opposed pressing faces.
Claim 4
Dependent Claim
86 words
An apparatus according to claim 2, wherein said vibrating means further includes a support member slidably supported on said frame means and having means fixedly mounted thereon and disposed in supporting engagement with said transducer at the node of vibration thereof, and said resilient means comprising spring means coacting between said frame means and said support member for urging said support member into abuting engagement with a stop surface formed on said frame means whereby said first plate means is normally maintained in said predetermined position.
Claim 5
Dependent Claim
52 words
An apparatus according to claim 2, wherein said transducer is substantially aligned with the central longitudinally extending axis of said first plate means and is fixedly connected to said first plate means substantially at the midpoint thereof, and said resilient means including a spring member disposed in surrounding relationship to said transducer.
Claim 6
Dependent Claim
59 words
An apparatus according to claim 2, wherein said vibrating means includes a plurality of substantially identical transducers disposed substantially parallel to one another and having one end of each fixedly connected to said first plate means, said plurality of transducers being disposed within a circular pattern generated substantially about the central longitudinally extending axis of said first plate means.
Claim 7
Dependent Claim
45 words
An apparatus according to claim 5, wherein said first plate means has a plurality of radially extending grooves formed therein for separating said first plate means into a plurality of different zones, each of said zones having a different one of said transducers connected thereto.
Claim 8
Dependent Claim
24 words
An apparatus according to claim 1, wherein each of said pressing faces has pattern means formed thereon defining one side of a phonographic disc.
Claim 9
Dependent Claim
24 words
An apparatus according to claim 7, wherein said second plate means has passage means formed therein for permitting circulation of a cooling fluid therethrough.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-08-13 | 1977-02-12 | 1977-08-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-13 | 1981-02-12 | 1981-08-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-13 | 1985-02-12 | 1985-08-14 | $7700.00 | Window Closed / Lapsed |