US3579739A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for forming moulding components
Assignee: PTT UK
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Filing: 1967-05-24
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Granted: 1971-05-25
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Expires: 1987-05-24
Abstract
Abstract A method of and apparatus for sealing together certain component parts of a submarine cable repeater housing. The casing of the housing is closed by a bulkhead which is sealed to the casing by injection moulding polythene round cooperating surfaces on both casing and bulkhead. The apparatus comprises a moulding machine having several moulding cylinders each with a piston and having at least one injection nozzle.
Inventors
- 👤 James Edwin Henry Cosier
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 05:34
CPC Classifications
B; B29; B29C; B29C45/00; B29C45/14; B29C45/14467
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
147 words
Apparatus for forming a moulded seal round first and second metal portions to be sealed together comprising a moulding machine including a mould of anNular shape defining the outer wall of an open mould chamber, spaced sealing surfaces on said wall defining the extremities thereof, a plurality of injection cylinders integral with said mould and spaced round the periphery thereof, each said cylinder having an injection orifice providing access from the cylinder to the mould chamber, heating means located on the mould for heating same, a supporting frame having an annular portion, a plurality of double-acting pistons equal in number to said plurality of injection cylinders, said pistons being mounted on said annular portion in positions corresponding to the positions of said cylinders, means for supporting said mould round said first and second metal portions, and further means for moving said supporting frame relatively to said mould.
Claim 2
Dependent Claim
147 words
Apparatus for forming a moulded seal round first and second metal portions to be sealed together comprising a moulding machine including a mould of anNular shape defining the outer wall of an open mould chamber, spaced sealing surfaces on said wall defining the extremities thereof, a plurality of injection cylinders integral with said mould and spaced round the periphery thereof, each said cylinder having an injection orifice providing access from the cylinder to the mould chamber, heating means located on the mould for heating same, a supporting frame having an annular portion, a plurality of double-acting pistons equal in number to said plurality of injection cylinders, said pistons being mounted on said annular portion in positions corresponding to the positions of said cylinders, means for supporting said mould round said first and second metal portions, and further means for moving said supporting frame relatively to said mould.
Claim 3
Dependent Claim
26 words
Apparatus as claimed in claim 1 wherein said heating means comprise a plurality of heating elements, each heating element being associated with a particular injection cylinder.
Claim 4
Dependent Claim
27 words
Apparatus as claimed in claim 1 and further including a fluid pressure system operating on the plurality of pistons each located in one of the injection cylinders.
Claim 5
Dependent Claim
34 words
Apparatus as claimed in claim 3 wherein said fluid pressure system comprises hydraulic operating means operable to produce simultaneous and uniform injection of material to be moulded from said cylinders into said mould chamber.
References Cited (Backward Citations)
US2744290A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-05-24 | 1974-11-23 | 1975-05-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-24 | 1978-11-23 | 1979-05-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-24 | 1982-11-23 | 1983-05-25 | $7700.00 | Window Closed / Lapsed |