US3904084A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Plastic bag and a protective container therefor and a fixture for securing the bag in the container
Assignee: Montedison SpA
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Filing: 1973-09-14
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Granted: 1975-09-09
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Expires: 1993-09-14
Abstract
Abstract A package for bulk materials having a box-like protective container and a plastic bag liner, and means for securing the bag in the container by a triangularly shaped flap formed by a fold of the bag wall, said means comprising a channel member and an elongated metal strip adapted to be secured in the groove of the channel member and secure the flap therebetween, said bag also having triangularly shaped flaps for filling and emptying the bag.
Inventors
- 👤 Luigi Ukmar
- 👤 Mario Agostini
- 👤 Gianfranco Bellandi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 05:07
CPC Classifications
B; B65; B65D; B65D90/00; B65D90/02; B65D90/04; B65D90/046; B65D90/047; B65D90/008; B65D2590/00; B65D2590/02; B65D2590/04; B65D2590/043; B65D2590/046
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
246 words
A large plastic bag adapted to contain granular material and disposed in a protective container having front and back doors and a floor, said bag being closed by weld lines at each end and folded to form a pair of oppositely disposed triangularly shaped integral flaps projecting outwardly from the said end; means for anchoring a first flap to the floor of the container comprising a channel member having said flap wound thereabout and means for pressing the wound flap against said channel member, means carried by said container for securing the channel member and said flap pressed thereagainst to the floor of the container; a second flap at the opposite end of the bag in the same plane as the first flap and adapted for emptying the bag; means for securing the second flap to the floor of the container adjacent to the front door of the container while the bag is being loaded and is storing bulk material, a third flap on the same end of the bag as the emptying flap, a series of elements arranged to form a vertical grating in the container immediately behind the front door and provided with a clearance through which loading and unloading flaps project, a cross-bar inserted above the grating for retaining the flap used for loading the bag and means comprising a hopper secured to the unloading flap for unloading the bags contents when the door is open and the container is inclined from horizontal.
Claim 2
Dependent Claim
246 words
A large plastic bag adapted to contain granular material and disposed in a protective container having front and back doors and a floor, said bag being closed by weld lines at each end and folded to form a pair of oppositely disposed triangularly shaped integral flaps projecting outwardly from the said end; means for anchoring a first flap to the floor of the container comprising a channel member having said flap wound thereabout and means for pressing the wound flap against said channel member, means carried by said container for securing the channel member and said flap pressed thereagainst to the floor of the container; a second flap at the opposite end of the bag in the same plane as the first flap and adapted for emptying the bag; means for securing the second flap to the floor of the container adjacent to the front door of the container while the bag is being loaded and is storing bulk material, a third flap on the same end of the bag as the emptying flap, a series of elements arranged to form a vertical grating in the container immediately behind the front door and provided with a clearance through which loading and unloading flaps project, a cross-bar inserted above the grating for retaining the flap used for loading the bag and means comprising a hopper secured to the unloading flap for unloading the bags contents when the door is open and the container is inclined from horizontal.
Claim 3
Dependent Claim
68 words
The product of claim 1 wherein the said plastic bag has been obtained by welding an extruded tubular film at spaced points to form two ends, the two welds being parallel to each other and perpendicular to the generating line of the tube; said tube having been under tension while it was welded to form a pair of triangularly shaped flaps at the opposite ends of the bag.
Claim 4
Dependent Claim
74 words
The product of claim 1 wherein the said channel member for the anchoring of one flap to the floor of the container has a substantially U-shaped cross-section, said triangle is wound thereabout, and a pressure rod is secured in the longitudinal groove of the channel member by means of screws and wing nuts, the ends of said channel member being inserted into two profiled angle irons fixed to the opposite walls of the container.
Claim 5
Dependent Claim
67 words
The assembly of claim 1 wherein the means for anchoring the discharging flap consists of a substantially U-shaped member and screws and nuts adapted for locking the discharge flap between the floor and the last element of the grating and, adjacent each screw and on the inner side of the container, a protecting plate suitable for preventing damage to the bag during the tightening of the screws.
Claim 6
Dependent Claim
34 words
The assembly of claim 1 wherein the elements forming said grating consist of metal rod-like profile irons insertable by their ends into vertical guides on uprights fixed to the front uprights of the container.
Claim 7
Dependent Claim
30 words
The assembly of claim 1 wherein said loading flap is Wound about and fixed on a bar whose ends are insertable into seats provided for that purpose above the grating.
Claim 8
Dependent Claim
155 words
A container for bulk material comprising a protective box having front, rear, top, bottom and sidewalls and a plastic bag liner, said bag having closed ends each with a pair of triangularly shaped folds extending as flaps and integral with the bag wall, a first flap being adapted to be used for emptying the bag when tilted and a second flap on the opposite end of the bag and in the same plane as the first flap and means anchoring said bag in the box to the bottom wall thereof comprising a channel member, said second flap being wound about said channel member, a bar-like member secured in the groove of the channel member with the underlying portion of the flap pressed in the groove, and a pair of C-shaped members secured to the bottom wall of the box adjacent to opposite side walls, said channel member having its ends inserted in said C-shaped members.
Claim 9
Dependent Claim
155 words
A container for bulk material comprising a protective box having front, rear, top, bottom and sidewalls and a plastic bag liner, said bag having closed ends each with a pair of triangularly shaped folds extending as flaps and integral with the bag wall, a first flap being adapted to be used for emptying the bag when tilted and a second flap on the opposite end of the bag and in the same plane as the first flap and means anchoring said bag in the box to the bottom wall thereof comprising a channel member, said second flap being wound about said channel member, a bar-like member secured in the groove of the channel member with the underlying portion of the flap pressed in the groove, and a pair of C-shaped members secured to the bottom wall of the box adjacent to opposite side walls, said channel member having its ends inserted in said C-shaped members.
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) | 1978-09-08 | 1979-03-10 | 1979-09-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-09-08 | 1983-03-10 | 1983-09-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-09-08 | 1987-03-10 | 1987-09-09 | $7700.00 | Window Closed / Lapsed |