Patent US3532061A successfully refreshed from Google Patents.
Patent US3579945A successfully refreshed from Google Patents.
US3579945A
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US
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Apparatus for reducing the atmospheric oxygen content of fluent solid pourable materials by gas exchange
Assignee: FR HESSER MASCHIENFABRIK AG
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Filing: 1969-08-08
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Granted: 1971-05-25
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Expires: 1989-08-08
Abstract
Abstract To prevent spoiling of fluent solid materials by the action of atmospheric oxygen entrapped in the material during the packaging thereof in a form, fill and seal machine, the materials are subjected to a counterflow treatment with a gas which will take up the oxygen. For this purpose there is a gas supply conduit opening into the zone of the materials in the feed pipe of the machine, and a gas-storage chamber in the forming mandrel of the machine above this zone.
Inventors
- 👤 Norbert Buchner
- 👤 Klaus Domke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 14:55
CPC Classifications
B; B65; B65B; B65B31/00; B65B31/04; B65B31/044; B65B31/045; B65B9/00; B65B9/10; B65B9/20; B65B9/213
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
38 words
An apparatus according to claim 1, in which the mandrel is of larger diameter than the filling pipe and is mounted concentrically around the latter with an annular clearance between them, said clearance forming the said hollow chamber.
Claim 2
Dependent Claim
28 words
An apparatus according to claim 2, in which the hollow chamber is divided by a plurality of axially parallel plates disposed radially in relation to said filling pipe.
Claim 3
Dependent Claim
34 words
An apparatus according to claim 1, in which the said gas supply conduit is a pipe surrounding the filling pipe and including a plurality of downwardly directed discharge nozzles at the lower end thereof.
Claim 4
Dependent Claim
27 words
An apparatus according to claim 1, in which an additional gas-storage device is arranged externally of the forming mandrel and is connected to the aforesaid hollow chamber.
Claim 5
Dependent Claim
52 words
An apparatus according to claim 1, in which a gas analyzer is mounted externally of the forming mandrel and includes a probe extending below said forming mandrel, thereby to project into the hollow interior of a tube of packaging material passing downwards below the forming mandrel and communicating with said hollow chamber.
Claim 6
Dependent Claim
36 words
An apparatus according to claim 6, in which the gas analyzer is connected to a regulator for controlling the gas fed to said gas supply conduit in accordance with the gas values measured by said analyzer.
Claim 7
Dependent Claim
49 words
An apparatus according to claim 1, wherein said apparatus is constituted by a self-enclosed unit including a device for dispensing the fluent solid material to the bagmaking machine, a device for feeding said material to the dispensing device, and an assembly for flushing the infed material with protective gas.
Claim 8
Dependent Claim
59 words
An apparatus according to claim 8, in which said unit includes a conduit through which protective gas is supplied to said device for feeding fluent, solid pourable material to the dispensing device, a gas regulator in the conduit, and a gas analyzer associated with said dispensing device and adapted to test the gas therein and control said gas regulator.
Claim 9
Dependent Claim
14 words
Apparatus according to claim 1 wherein the gas supply conduit surrounds said filling pipe.
Claim 10
Dependent Claim
17 words
Apparatus according to claim 10 wherein said hollow chamber is annular and surrounds said gas supply conduit.
References Cited (Backward Citations)
US2160367A
Cited
US3482373A
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 |