Patent US3928940A successfully refreshed from Google Patents.
US3928940A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Packaging machine
Assignee: Boracier SA
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Filing: 1974-02-27
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Granted: 1975-12-30
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Expires: 1994-02-27
Abstract
Abstract Machine for packaging materials having a low mesh size, in cubic bags of flexible material. Each bag is supported in a rigidwalled cubic enclosure mounted on the door of an hermetically sealed filling chamber and a vacuum or controlled gaseous atmosphere is established and maintained in the filling chamber. The bag is vibrated and filled, under the controlled atmosphere, with the material to be packaged from which gas has been removed. The material falls under gravity from an hermetically sealed degassing and weighing chamber mounted above the filling chamber, passing through a tube into the bag. The neck of the filled bag is heat-sealed under vacuum in the filling chamber by two sealing heads. The sealed, filled bag is then removed from the filling chamber by opening the door and the bag is removed from the enclosure by a suction plate which grips one side of the bag. The bag can be inflated before insertion into the enclosure in order to produce its maximum volume.
Inventors
- 👤 Gaston Fagniart
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 21:51
CPC Classifications
B; B65; B65B; B65B1/00; B65B1/20; B65B1/22
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
217 words
A machine for packaging finely divided material, comprising; support means for supporting and laterally confining a bag of flexible material, said support means comprising flat rigid walls defining an enclosure open at at least its upper part, to prevent deformation of the bag when the bag is filled with divided material; means for defining a first chamber, for sealing it tightly and for receiving therein the material to be packaged in the bag; a discharge pipe for discharging the material received in the first chamber from that chamber; means for defining a second chamber and for sealing it tightly, and into which chamber the discharge pipe opens; means for maintaining a controlled gaseous atmosphere selectively in said first chamber for treatment of the material received therein, and in both chambers for controlled filling of the bag; closure means for supporting the support means, for enabling introduction of the support means and of the bag thereon into the second chamber, and for positioning a neck of the bag under the discharge pipe to enable filling of the bag, in the controlled gaseous atmosphere, with finely divided material previously treated by exposure to such atmosphere in the first chamber; and means in the second chamber for sealing the neck of the bag pursuant to the filling of the bag.
Claim 2
Dependent Claim
217 words
A machine for packaging finely divided material, comprising; support means for supporting and laterally confining a bag of flexible material, said support means comprising flat rigid walls defining an enclosure open at at least its upper part, to prevent deformation of the bag when the bag is filled with divided material; means for defining a first chamber, for sealing it tightly and for receiving therein the material to be packaged in the bag; a discharge pipe for discharging the material received in the first chamber from that chamber; means for defining a second chamber and for sealing it tightly, and into which chamber the discharge pipe opens; means for maintaining a controlled gaseous atmosphere selectively in said first chamber for treatment of the material received therein, and in both chambers for controlled filling of the bag; closure means for supporting the support means, for enabling introduction of the support means and of the bag thereon into the second chamber, and for positioning a neck of the bag under the discharge pipe to enable filling of the bag, in the controlled gaseous atmosphere, with finely divided material previously treated by exposure to such atmosphere in the first chamber; and means in the second chamber for sealing the neck of the bag pursuant to the filling of the bag.
Claim 3
Dependent Claim
19 words
Packaging machine according to claim 1, further including means for inflating the bag before its introduction into the enclosure.
Claim 4
Dependent Claim
65 words
Packaging machine according to claim 2, in which the means for inflating the bag comprise: a supply tube for compressed air insertable in the neck of the bag; and inflatable annular seal means surrounding the tube for engaging the inner side of the neck of the bag; said tube being telescopic and having means for telescopically sliding a lower end portion thereof into said neck.
Claim 5
Dependent Claim
19 words
Packaging machine according to claom 1, in which the first chamber comprises means for weighing the material received therein.
Claim 6
Dependent Claim
19 words
Packaging machine according to claom 1, in which the first chamber comprises means for weighing the material received therein.
Claim 7
Dependent Claim
43 words
Packaging machine according to claim 1, in which the first chamber is located above the second chamber and the discharge pipe has valve means for enabling controlled descent of the material by gravity from the first chamber to the second, in said atmosphere.
Claim 8
Dependent Claim
34 words
Packaging machine according to claim 1, in which the discharge pipe comprises a telescopic, lower end portion and means for introducing the latter into the neck of the bag to facilitate filling the bag.
Claim 9
Dependent Claim
30 words
Packaging machine according to claim 1, in which the second chamber comprises means for retaining the neck of the bag during filling, in predetermined position relative to the discharge pipe.
Claim 10
Dependent Claim
24 words
Packaging machine according to claim 1, in which the support means for the bag is integral with the closure means of the second chamber.
Claim 11
Dependent Claim
87 words
Packaging machine according to claim 1, in which the second chamber comprises means for retaining the neck of the bag, during filling, in predetermined position and wherein the support means for the bag is integral with the closure means of the second chamber, the means for retaining the neck of the bag during filling comprising arms, each pivoted at one of its ends, on an inner face of the closure means, and means for gripping the neck of the bag on the other end of each arm.
Claim 12
Dependent Claim
54 words
Packaging machine according to claim 9, in which each of said arms has an arcuate rib thereon and an inflatable seal located in said rib and engageable with the neck, the arms having means for positioning the rib, relative to the neck to enable and control the engaging of the seal with the neck.
Claim 13
Dependent Claim
27 words
Packaging machine according to claim 1, in which the second chamber comprises means for deforming the neck of the bag into a pair of flat joined walls.
Claim 14
Dependent Claim
69 words
Packaging machine according to claim 11, in which said means for deforming the neck of the bag comprise two hooks disposed on either side of the discharge pipe, means for introducing said hooks into the neck of the bag, and means for moving said hooks symmetrically away from the discharge pipe, with portions of the edge of the neck engaged by the hooks, to prepare the neck for sealing.
Claim 15
Dependent Claim
100 words
Packaging machine according to claim 1, in which said means for sealing the neck of the bag comprise two heatable head means for heat sealing sheets of synthetic plastic material to one another; means for pressing said heated head means in mutually opposite directions against either side of the neck of a bag, of synthetic, plastic material; heat-conductive, low-adhesion rod means on each head means for contact with the neck of the bag, and abutment means for limiting the pressing of the head means against the neck and the resulting depth of penetration of the head means into the neck.
Claim 16
Dependent Claim
51 words
Packaging machine according to claim 13, in which each rod has a contour having a contour portion projecting from the rod, whereby, when the two rods penetrate into the neck of the synthetic plastic bag to be sealed, flowing of melted plastic material is produced, relative to the projecting contour portion.
Claim 17
Dependent Claim
39 words
Packaging machine according to claim 8, further including means for horizontally ejecting the bag from the support means after filling and sealing of the bag, said support means having a lateral opening for facilitating the ejecting of the bag.
Claim 18
Dependent Claim
24 words
Packaging machine according to claim 15, in which the second chamber has inner door means for closing the lateral opening of the support means.
Claim 19
Dependent Claim
64 words
Packaging machine according to claim 1, further including an additioNal subcombination, similar to the first-mentioned one, of a first chamber, a second chamber, a support means, a discharge pipe, a closure means and a sealing means, for filling another bag; and valve means for interconnecting the two second chambers to equalize and control the maintaining of a controlled atmosphere in said two second chambers.
Claim 20
Dependent Claim
22 words
Packaging machine according to claim 1 in which the means for maintaining a controlled atmosphere comprises means for maintaining a high vacuum.
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) | 1978-12-29 | 1979-06-30 | 1979-12-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-12-29 | 1983-06-30 | 1983-12-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-12-29 | 1987-06-30 | 1987-12-30 | $7700.00 | Window Closed / Lapsed |