US4057949A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bagging methods
Assignee: BREVETS GREFFE Ste
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Filing: 1976-11-19
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Granted: 1977-11-15
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Expires: 1996-11-19
Abstract
Abstract An improved method for bagging material, particularly granular material in which the material is first placed into a bag, the bag is closed by bringing the lips of the open end together and folding them over, preferably with a double fold, a discontinuous seal is then made along the closure, the bag is then subjected to atmospheric pressure.
Inventors
- 👤 Maurice F. Greffe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 16:40
CPC Classifications
B; B65; B65B; B65B7/00; B65B7/02; B65B7/06; B65B7/08; B65B1/00; B65B1/20; B65B1/26; B65D; B65D77/00; B65D77/10; B65D77/14
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
108 words
A method of bagging material in a bag to reduce the quantity of air trapped in the bag comprising the steps of: filling a quantity of material in the bag, forming a closure for the previously filled bag by a. first bringing the lips of the bag opening together and folding the lips over on themselves to form a fold area and, b. then providing a plurality of seals spaced apart along the fold area subjecting the bag to a reduced pressure to deaerate it through the closure, and subjecting the bag to atmospheric pressure, the said closure forming an obstacle to the intrusion of the outside gases.
Claim 2
Independent Claim
108 words
A method of bagging material in a bag to reduce the quantity of air trapped in the bag comprising the steps of: filling a quantity of material in the bag, forming a closure for the previously filled bag by a. first bringing the lips of the bag opening together and folding the lips over on themselves to form a fold area and, b. then providing a plurality of seals spaced apart along the fold area subjecting the bag to a reduced pressure to deaerate it through the closure, and subjecting the bag to atmospheric pressure, the said closure forming an obstacle to the intrusion of the outside gases.
Claim 3
Dependent Claim
30 words
A method according to claim 1, wherein the step of forming the closure comprises forming the lips of the bag with at least one double fold before providing the seals.
Claim 4
Dependent Claim
44 words
A method according to claim 1 wherein during the step of subjecting the bag to the reduced pressure the bag is placed with its closure facing upward to avoid the clogging of the interstices between the seals by the material contained in the bag.
Claim 5
Dependent Claim
32 words
A method according to claim 1, wherein the step of subjecting the bag to the reduced pressure comprises providing a pressure in the order of at least 300 mm Hg or less.
Claim 6
Dependent Claim
27 words
A method according to claim 1 further comprising the step of shaping the bag before forming the closure and before a subjecting it to the reduced pressure.
Claim 7
Dependent Claim
26 words
A method according to claim 1 further comprising the step of shaping the bag after forming the closure but before subjecting it to the reduced pressure.
Claim 8
Dependent Claim
20 words
A method as in claim 1 when the step of forming the seals comprises making the seals by mechanical means.
Claim 9
Dependent Claim
28 words
A method as in claim 1 wherein the bag is of plastic material and the step of forming the seals comprises heat-sealing selected portions of the fold area.
Claim 10
Dependent Claim
22 words
A method according to claim 2 wherein the lips of the bag are formed with at least two double folds before sealing.
Claim 11
Dependent Claim
28 words
A method according to claim 1 wherein the step of subjecting the bag to a reduced pressure comprises placing the entire bag in a chamber of reduced pressure.
Claim 12
Dependent Claim
22 words
A method as in claim 7 wherein the step of making the seals by mechanical means comprises making the seal by stapling.
Claim 13
Dependent Claim
22 words
A method as in claim 7 when the step of making the seals by mechanical means comprises providing a number of eyelets.
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) | 1980-11-14 | 1981-05-16 | 1981-11-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-11-14 | 1985-05-16 | 1985-11-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-11-14 | 1989-05-16 | 1989-11-15 | $7700.00 | Window Closed / Lapsed |