Patent US3941318A successfully refreshed from Google Patents.
US3941318A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Systems for the feeding of plastics materials to plastics working machines
Assignee: Oaktree Equipment Ltd
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Filing: 1974-02-20
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Granted: 1976-03-02
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Expires: 1994-02-20
Abstract
Abstract A system for supplying plastics material to a plastics working machine, such as a blow moulding machine comprising automatic means for removing waste from a plastics working machine, a conveyor for feeding the waste to a comminuting machine, a hopper for comminuted plastics waste, and a conveying mechanism for mixing and conveying the plastics waste and fresh plastics material to a further hopper that is arranged to supply the inlet of the plastics working machine.
Inventors
- 👤 Maurice Gordon Ballinger
- 👤 Raymond Mitchell Oakerbee
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 06:18
CPC Classifications
B; B29; B29C; B29C31/00; B29C31/02; Y; Y02; Y02W; Y02W30/00; Y02W30/50; Y02W30/62
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
228 words
A system for feeding plastics material to the inlet of at least one plastics working machine, said system comprising automatic means for removing plastics waste from the plastics working machine, a comminuting machine, a conveyor for feeding collected waste to said comminuting machine, a conveying mechanism for mixing the comminuted plastics waste and fresh plastics material, and container means for receiving the mixture from said conveying mechanism and for supplying the plastics working machine with the mixed plastics waste and fresh plastics material, said conveying mechanism comprising a first probe tube, a first container for comminuted plastics waste, said first probe tube projecting into said first container, a first venturi having one inlet connected to said probe tube and a second inlet connected to a source of air under pressure, said first venturi having an outlet, a hose connected to the outlet of said first venturi, a union connected to said hose, said conveying mechanism further comprising a second probe tube, a second container for fresh plastics material, said second probe tube projecting into said second container, a second venturi connected to said second probe tube and to a source of air under pressure, said second venturi being connected to said union, said union being coupled to said container means for supplying the mixed plastics waste and fresh plastics material to the inlet of the plastics working machine.
Claim 2
Independent Claim
228 words
A system for feeding plastics material to the inlet of at least one plastics working machine, said system comprising automatic means for removing plastics waste from the plastics working machine, a comminuting machine, a conveyor for feeding collected waste to said comminuting machine, a conveying mechanism for mixing the comminuted plastics waste and fresh plastics material, and container means for receiving the mixture from said conveying mechanism and for supplying the plastics working machine with the mixed plastics waste and fresh plastics material, said conveying mechanism comprising a first probe tube, a first container for comminuted plastics waste, said first probe tube projecting into said first container, a first venturi having one inlet connected to said probe tube and a second inlet connected to a source of air under pressure, said first venturi having an outlet, a hose connected to the outlet of said first venturi, a union connected to said hose, said conveying mechanism further comprising a second probe tube, a second container for fresh plastics material, said second probe tube projecting into said second container, a second venturi connected to said second probe tube and to a source of air under pressure, said second venturi being connected to said union, said union being coupled to said container means for supplying the mixed plastics waste and fresh plastics material to the inlet of the plastics working machine.
Claim 3
Dependent Claim
22 words
A system according to claim 1, wherein said conveyor for feeding the collected waste to the comminuting machine is a pneumatic conveyor.
Claim 4
Dependent Claim
22 words
A system according to claim 1, wherein said conveyor for feeding the collected waste to the comminuting machine is a mechanical conveyor.
Claim 5
Dependent Claim
45 words
A system according to claim 1, wherein said first container for comminuted plastics waste, said container means and the inlet of said plastics working machine are each provided with a level sensing mechanism operatively connected to the conveyor and the conveying mechanism to prevent overfilling.
Claim 6
Independent Claim
138 words
A system for feeding plastics material to at least one plastics working machine, said system comprising automatic means for removing plastics waste from the plastics working machine, a conveyor for receiving collected waste from the automatic removing means, a comminuting machine connected to the conveyor for receiving the waste therefrom and for producing comminuted plastics waste, container means for receiving comminuted plastics waste produced by the comminuting machine, and a conveying mechanism for mixing and conveying the comminuted plastics waste and fresh plastics material to an inlet of the plastics working machine to supply that inlet with mixed plastics waste and fresh plastics material, said conveying mechanism comprising a flexible Archimedian screw, said container means comprising a hopper divided into two parts, each part having a variable outlet in communication with said conveying mechanism containing the Archimedian screw.
Claim 7
Independent Claim
138 words
A system for feeding plastics material to at least one plastics working machine, said system comprising automatic means for removing plastics waste from the plastics working machine, a conveyor for receiving collected waste from the automatic removing means, a comminuting machine connected to the conveyor for receiving the waste therefrom and for producing comminuted plastics waste, container means for receiving comminuted plastics waste produced by the comminuting machine, and a conveying mechanism for mixing and conveying the comminuted plastics waste and fresh plastics material to an inlet of the plastics working machine to supply that inlet with mixed plastics waste and fresh plastics material, said conveying mechanism comprising a flexible Archimedian screw, said container means comprising a hopper divided into two parts, each part having a variable outlet in communication with said conveying mechanism containing the Archimedian screw.
Claim 8
Dependent Claim
47 words
A system according to claim 5 comprising a further container arranged to supply the inlet of the plastics working machine with mixed plastics waste and fresh plastics material, said further container being connected to the end of said conveying mechanism that is remote from the container means.
Claim 9
Dependent Claim
40 words
A system according to claim 5, wherein said container means for comminuted plastics waste and the inlet of the plastics working machine are each provided with a level sensing mechanism operatively connected to the conveyor and to the conveying mechanism.
Claim 10
Dependent Claim
34 words
A system according to claim 5 comprising manually manipulable means for controlling the sizes of the outlets of said parts of said hopper, said manually manipulable means being disposed above the flexible Archimedian screw.
Claim 11
Independent Claim
155 words
A system for feeding plastics material to at least one plastics working machine, said system comprising automatic means for removing plastics waste from the plastics working machine, a conveyor for receiving collected waste from the automatic removing means, a comminuting machine connected to the conveyor for receiving the waste therefrom and for producing comminuted plastics waste, container means for receiving comminuted plastics waste produced by the comminuting machine, and a conveying mechanism for mixing and conveying the comminuted plastics waste and fresh plastics material to an inlet of the plastics working machine to supply that inlet with mixed plastics waste and fresh plastics material, said conveying mechanism comprising a flexible Archimedian screw, a conduit connected to said Archimedian screw for carrying the mixture of waste and fresh plastics material, said conduit having an end remote from said screw with a discharge outlet thereat, and a second Archmedian screw in said conduit at said discharge outlet.
Claim 12
Independent Claim
155 words
A system for feeding plastics material to at least one plastics working machine, said system comprising automatic means for removing plastics waste from the plastics working machine, a conveyor for receiving collected waste from the automatic removing means, a comminuting machine connected to the conveyor for receiving the waste therefrom and for producing comminuted plastics waste, container means for receiving comminuted plastics waste produced by the comminuting machine, and a conveying mechanism for mixing and conveying the comminuted plastics waste and fresh plastics material to an inlet of the plastics working machine to supply that inlet with mixed plastics waste and fresh plastics material, said conveying mechanism comprising a flexible Archimedian screw, a conduit connected to said Archimedian screw for carrying the mixture of waste and fresh plastics material, said conduit having an end remote from said screw with a discharge outlet thereat, and a second Archmedian screw in said conduit at said discharge outlet.
Claim 13
Dependent Claim
44 words
A system according to claim 9, wherein said container means comprises a hopper divided into two parts, each part having a variable outlet leading into said first Archimedian screw, and means disposed above said first Archimedian screw for controlling the sizes of said outlets.
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) | 1979-03-02 | 1979-09-01 | 1980-03-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-03-02 | 1983-09-01 | 1984-03-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-03-02 | 1987-09-01 | 1988-03-02 | $7700.00 | Window Closed / Lapsed |