Patent US3426989A successfully refreshed from Google Patents.
Patent US3722755A successfully refreshed from Google Patents.
US3722755A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for automatically filling a predetermined amount of powdered grain substance
Assignee: Individual
•
Filing: 1970-09-11
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Granted: 1973-03-27
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Expires: 1990-09-11
Abstract
Abstract Apparatus for automatically filling a pre-determined amount of powdered granular material into a bag. The apparatus comprises a screw feeder provided within a tubular conveyor case, the walls of which are flexible. A smooth transfer of powder is effected by vibrating the walls of the conveyor case. In addition, to transfer the substance from the conveyor a pulsed compressed air stream is jetted at the substance being transferred near the other end of the conveyor case. Within the conveyor case are provided a mixing chamber, and a supply tube connected to measuring apparatus via a flexible tube, so that when a predetermined amount of powdered material is filled in the bag, the filling operation automatically comes to a stop.
Inventors
- 👤 S Nakashima
- 👤 K Tenjinmori
- 👤 O Morimoto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 13:39
CPC Classifications
B; B65; B65B; B65B1/00; B65B1/04; B65B1/18
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
186 words
An apparatus for automatically bag filling a predeTermined weight amount of powdered substance, said apparatus comprising in combination, a powdered substance supply hopper, de-airing means, said de-airing means having a first screw conveyor for transfer of powdered substance from said hopper to a discharge chamber, a second screw conveyor oppositely disposed to said chamber and having screw blades rotating opposite said first screw conveyor for pushing powdered substance toward said chamber, and a deairing duct for exhausting air from said first conveyor, said first screw conveyor being pitched in successive dimunition toward its discharge end, pressure feeding means having screw feeding means for receiving powered substance from the said chamber and for transferring same to a tapered flexible mixing chamber, said screw feeding means having a hollow shaft for transfer of pulses of compressed air to the mixing chamber, a weight measuring means comprising a weight indicator, a bag support in communication with said weight indicator, and a bag for receiving powdered substance by means of a discharge nozzle, said discharge nozzle being connected to said tapered flexible mixing chamber by means of a flexible tube.
Claim 2
Independent Claim
186 words
An apparatus for automatically bag filling a predeTermined weight amount of powdered substance, said apparatus comprising in combination, a powdered substance supply hopper, de-airing means, said de-airing means having a first screw conveyor for transfer of powdered substance from said hopper to a discharge chamber, a second screw conveyor oppositely disposed to said chamber and having screw blades rotating opposite said first screw conveyor for pushing powdered substance toward said chamber, and a deairing duct for exhausting air from said first conveyor, said first screw conveyor being pitched in successive dimunition toward its discharge end, pressure feeding means having screw feeding means for receiving powered substance from the said chamber and for transferring same to a tapered flexible mixing chamber, said screw feeding means having a hollow shaft for transfer of pulses of compressed air to the mixing chamber, a weight measuring means comprising a weight indicator, a bag support in communication with said weight indicator, and a bag for receiving powdered substance by means of a discharge nozzle, said discharge nozzle being connected to said tapered flexible mixing chamber by means of a flexible tube.
Claim 3
Dependent Claim
19 words
The apparatus of claim 1, wherein means are included for maintaining the walls of said mixing chamber under tension.
Claim 4
Dependent Claim
19 words
The apparatus of claim 1, wherein said screw feeding means is partly disposed within the tapered flexible mixing chamber.
Claim 5
Dependent Claim
23 words
The apparatus of claim 1, wherein screw conveyors of the de-airing means are substantially horizontally disposed and are co-axially mounted on a shaft.
Claim 6
Dependent Claim
17 words
The apparatus of claim 1, wherein filter means are included in said de-airing duct for exhausting air.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-03-26 | 1976-09-25 | 1977-03-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-03-26 | 1980-09-25 | 1981-03-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-03-26 | 1984-09-25 | 1985-03-27 | $7700.00 | Window Closed / Lapsed |