US3716082A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pressure type bag filling machine
Assignee: Douglas and Lomason Co
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Filing: 1971-01-22
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Granted: 1973-02-13
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Expires: 1991-01-22
Abstract
Abstract A pressure type bag filling machine in which a pressure hopper has a downwardly directed air tube supplied with air under pressure to effect the flow of granular material from the hopper through a discharge nozzle and into a valve bag until the bag is filled with a predetermined weight of product. The air tube extends through an inclined orifice plate which extends across the hopper and allows the product to accumulate in a small pile below the orifice plate over the discharge nozzle so that the pressure air can more easily initiate motion of the product and maintain substantially uniform flow of product through the nozzle, resulting in more rapid operation and more accurate weighing.
Inventors
- 👤 J Green
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 02:04
CPC Classifications
B; B65; B65B; B65B1/00; B65B1/04; B65B1/16; B65B1/18
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
193 words
A pressure type bag filling machine for filling a valve type bag with a required weight of granular product, comprising a pressure hopper having a discharge nozzle at its lower end, a filling tube extending from said nozzle, means for supporting and weighing a bag with said filling tube extending into said bag, an air tube in said hopper, means for supplying air under pressure through said tube to promote the flow of product from said hopper through said nozzle and filling tube into said bag, and an orifice plate in said hopper above said discharge nozzle and adapted to support a column of product in said hopper, said orifice plate having an opening therein substantially directly above said discharge nozzle to allow the product to fall freely through said opening to accumulate in a pile over said discharge nozzle, said air tube discharging air under pressure into said hopper below said plate to cause the flow of product from said pile through said nozzle and filling tube, said orifice plate being provided with a series of apertures therein to equalize the air pressure in said hopper on opposite sides of said plate.
Claim 2
Dependent Claim
193 words
A pressure type bag filling machine for filling a valve type bag with a required weight of granular product, comprising a pressure hopper having a discharge nozzle at its lower end, a filling tube extending from said nozzle, means for supporting and weighing a bag with said filling tube extending into said bag, an air tube in said hopper, means for supplying air under pressure through said tube to promote the flow of product from said hopper through said nozzle and filling tube into said bag, and an orifice plate in said hopper above said discharge nozzle and adapted to support a column of product in said hopper, said orifice plate having an opening therein substantially directly above said discharge nozzle to allow the product to fall freely through said opening to accumulate in a pile over said discharge nozzle, said air tube discharging air under pressure into said hopper below said plate to cause the flow of product from said pile through said nozzle and filling tube, said orifice plate being provided with a series of apertures therein to equalize the air pressure in said hopper on opposite sides of said plate.
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) | 1976-02-13 | 1976-08-14 | 1977-02-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-02-13 | 1980-08-14 | 1981-02-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-02-13 | 1984-08-14 | 1985-02-13 | $7700.00 | Window Closed / Lapsed |