Patent US3980016A successfully refreshed from Google Patents.
US3980016A
Expired / Lapsed
US
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Pressing apparatus
Assignee: Imperial Chemical Industries Ltd
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Filing: 1975-08-19
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Granted: 1976-09-14
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Expires: 1995-08-19
Abstract
Abstract Pressing apparatus wherein a cell containing a workpiece is subjected to pressure in a press in which at least one resilient layer of disc-spring units is used as a pressure distributing medium comprises a press, two press plates and a pressure distributor disposed between the pair of plates and one of the press platens. The pressure distributor consists of a plurality of disc-spring units disposed adjacent to one another over the surface of a supporting plate. Each disc-spring unit comprises a pair of disc-springs disposed one on either side of the supporting plate with the apexes of the springs towards each other, the springs of each pair being fastened together by means of rivets passing through an orifice in the plate.
Inventors
- 👤 Thomas Taylor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 13:47
CPC Classifications
B; B30; B30B; B30B15/00; B30B15/06; B30B15/061
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
79 words
A pressure distributing device comprising a supporting plate and a plurality of disc-spring units disposed adjacent to one another over the surface of the supporting plate, each disc spring unit comprising a pair of disc-springs disposed one on either side of the supporting plate with the apexes of the springs toward each other, the springs of each pair being fastened together by means of rivets passing through the orifices of the springs and through an orifice in the plate.
Claim 2
Dependent Claim
79 words
A pressure distributing device comprising a supporting plate and a plurality of disc-spring units disposed adjacent to one another over the surface of the supporting plate, each disc spring unit comprising a pair of disc-springs disposed one on either side of the supporting plate with the apexes of the springs toward each other, the springs of each pair being fastened together by means of rivets passing through the orifices of the springs and through an orifice in the plate.
Claim 3
Dependent Claim
15 words
A pressure distributing device as claimed in claim 1 in which the rivets are eyelets.
Claim 4
Dependent Claim
26 words
A pressure distributing device as claimed in claim 1 in which the space between adjacent disc-spring units is less than the outer diameter of the disc-springs.
Claim 5
Dependent Claim
34 words
A pressure distributing device as claimed in claim 1 in which the disc-spring units are disposed on the supporting plate at such a distance apart that, when flattened, the disc-springs would be close packed.
Claim 6
Dependent Claim
22 words
A pressure distributing device as claimed in claim 1 in which the disc-springs have an outer diameter of 10 to 30 mm.
Claim 7
Dependent Claim
3 words
Pressing apparatus comprising:
Claim 8
Dependent Claim
3 words
Pressing apparatus comprising:
Claim 9
Dependent Claim
9 words
a. a press having at least two press platens,
Claim 10
Dependent Claim
9 words
a. a press having at least two press platens,
Claim 11
Dependent Claim
15 words
b. a pair of press plates disposed between a pair of said press platens, and
Claim 12
Dependent Claim
15 words
b. a pair of press plates disposed between a pair of said press platens, and
Claim 13
Dependent Claim
96 words
c. a pressure distributing device disposed between said press plates and one platen of said pair of platens, said pressure distributing device comprising a supporting plate and a plurality of disc-spring units disposed adjacent to one another over the surface of the suppporting plate, each disc-spring unit comprising a pair of disc-springs disposed one on either side of the supporting plate with the apexes of the springs toward each other, the springs of each pair being fastened together by means of rivets passing through the orifices of the springs and through an orifice in the plate.
Claim 14
Dependent Claim
96 words
c. a pressure distributing device disposed between said press plates and one platen of said pair of platens, said pressure distributing device comprising a supporting plate and a plurality of disc-spring units disposed adjacent to one another over the surface of the suppporting plate, each disc-spring unit comprising a pair of disc-springs disposed one on either side of the supporting plate with the apexes of the springs toward each other, the springs of each pair being fastened together by means of rivets passing through the orifices of the springs and through an orifice in the plate.
References Cited (Backward Citations)
GB666758A
Cited
GB708070A
Cited
US2874751A
Cited
FR1242234A
Cited
US3434910A
Cited
US3619310A
Cited
US3682466A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-09-14 | 1980-03-15 | 1980-09-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-09-14 | 1984-03-15 | 1984-09-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-09-14 | 1988-03-15 | 1988-09-14 | $7700.00 | Window Closed / Lapsed |