US3830459A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Record presses
Assignee: EMI Electrola GmbH
•
Filing: 1973-06-26
•
Granted: 1974-08-20
•
Expires: 1993-06-26
Abstract
Abstract A gramophone record press has mould blocks having a fluid circuit for heating and cooling fluids. The fluid circuit comprises an inner circular channel adjacent the centre of the mould block and an outer circular channel adjacent the periphery of the mould block, the two channels being connected by ducts arranged as a plurality of interlaced spirals. The channels are connected respectively to inlet and outlet manifolds by a plurality of passages angularly spaced around the respective channels. The two sets of passages have a circumferential component of inclination, so that fluid is fed into the inlet channel with substantially the same velocity and sense, and removed from the outlet channel in a similar manner.
Inventors
- 👤 H Strausfeld
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 22:14
CPC Classifications
B; B30; B30B; B30B15/00; B30B15/06; B30B15/062; B30B15/064; B29; B29C; B29C33/00; B29C33/02; B29C33/04; B29C33/048; B29C43/00; B29L; B29L2017/00; B29L2017/001; B29L2017/003; Y; Y10; Y10S; Y10S425/00; Y10S425/81
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
127 words
A press for modulated groove disc records comprising a mould block having a plurality of internal ducts for the passage of fluid through the block to influence the temperature thereof, said ducts extending between annular channels located one near the edge of the block and the other near the centre of the block, the ducts having respective entrances and exits angularly spaced around the respective channels, and means for feeding fluid to be passed through the ducts in to one of said channels at a plurality of inlets spaced angularly around said one channel, said inlets having a circumferential component of inclination with respect to said one channel whereby the fluid is injected at each inlet with substantially the same sense and velocity around said one channel.
Claim 2
Dependent Claim
127 words
A press for modulated groove disc records comprising a mould block having a plurality of internal ducts for the passage of fluid through the block to influence the temperature thereof, said ducts extending between annular channels located one near the edge of the block and the other near the centre of the block, the ducts having respective entrances and exits angularly spaced around the respective channels, and means for feeding fluid to be passed through the ducts in to one of said channels at a plurality of inlets spaced angularly around said one channel, said inlets having a circumferential component of inclination with respect to said one channel whereby the fluid is injected at each inlet with substantially the same sense and velocity around said one channel.
Claim 3
Dependent Claim
33 words
A press in accordance with claim 1 in which said ducts comprise a plurality of interlaced spirals, the entrances to said spirals facing the upstream direction of fluid flow in said one channel.
Claim 4
Dependent Claim
26 words
A press in accordance with claim 1 in which said inlets comprise a plurality of passages extending from an annular inlet manifold to said one channel.
Claim 5
Dependent Claim
50 words
A press in accordance with claim 1 including a plurality of outlets angularly spaced around the other of said channels, said outlets having a circumferential component of inclination with respect to said other channel, the entrances of said outlets facing the upstream direction of fluid flow in said other channel.
Claim 6
Dependent Claim
26 words
A press in ccordance with claim 4 in which said outlets comprise a plurality of passages extending from said other channel to an annular outLet manifold.
Claim 7
Dependent Claim
23 words
A press in accordance with claim 1 in which said ducts are provided with means for producing turbulence in the fluid flowing therein.
Claim 8
Dependent Claim
17 words
A press in accordance with claim 6 in which said means for producing turbulence comprises fine grooves.
Claim 9
Dependent Claim
19 words
A press in accordance with claim 6 in which said means for producing turbulence comprises undulations in said ducts.
Claim 10
Dependent Claim
23 words
A press in accordance with claim 6 in which said means for producing turbulence comprises variations in the cross-sectional area of said ducts.
References Cited (Backward Citations)
US15608A
Cited
US483653A
Cited
US1307812A
Cited
US1251851A
Cited
US1290105A
Cited
US1442856A
Cited
US1582704A
Cited
US1504422A
Cited
US2828509A
Cited
US3224040A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-08-19 | 1978-02-18 | 1978-08-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-08-19 | 1982-02-18 | 1982-08-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-08-19 | 1986-02-18 | 1986-08-20 | $7700.00 | Window Closed / Lapsed |