US3783787A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Blasting charge and container therefor
Assignee: Ireco Inc
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Filing: 1972-01-17
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Granted: 1974-01-08
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Expires: 1992-01-17
Abstract
Abstract The invention is a container especially suitable for packaged blasting charge. A particular embodiment is one of the type used in mines for support on a stick or a pole, at points where a local blast is required as for removal of hang-ups of ore, protruding rock formations, and the like. The container is a bag or envelope of internally valved type, made of preformed flat or folded flexible sheet material, preferably a tough elastic heat sealable polymeric film or sheeting material suitably inturned and sealed to form a self-closing compartment for liquid or flowable slurry explosive. A supplemental pocket may be formed at the side of the main compartment for supporting the charge on a stick or pole. The main compartment is sealed along both sides and across one end and is closed by a flat lying valve element integral with one of the main side walls but sealed to the other main side wall across part only of its width and along a line spaced from the end of the valve element. A filler opening is thus provided at one or both sides of this cross-seal.
Inventors
- 👤 G Thornley
- 👤 R Stokes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 21:22
CPC Classifications
F; F42; F42B; F42B3/00
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
141 words
A valved container for liquid or granular materials such as slurry type explosive compositions and the like, which consists of at least three layers of sheet material sealed together along opposite side edges, a single middle layer between two main wall layers being a valve layer, said value layer being sealed across part only of its width to one of said main wall layers to form at least one valve opening at a side of said partial seal, said opening being disposed to receive a filling tube or nozzle, the two main walls being secured completely across their width at one end to close the container at said end, the intermediate or valve layer disposed between said main walls being fixed across its full width to the other of said main wall layers to close the other end of said container.
Claim 2
Dependent Claim
141 words
A valved container for liquid or granular materials such as slurry type explosive compositions and the like, which consists of at least three layers of sheet material sealed together along opposite side edges, a single middle layer between two main wall layers being a valve layer, said value layer being sealed across part only of its width to one of said main wall layers to form at least one valve opening at a side of said partial seal, said opening being disposed to receive a filling tube or nozzle, the two main walls being secured completely across their width at one end to close the container at said end, the intermediate or valve layer disposed between said main walls being fixed across its full width to the other of said main wall layers to close the other end of said container.
Claim 3
Dependent Claim
29 words
A container according to claim 1 formed of a single folded sheet, the three layers comprising the main walls and the valve layer being continuous portions of said sheet.
Claim 4
Dependent Claim
33 words
A container according to claim 1, formed of at least two separate sheets secured together along said side edges to form at least three layers sealed together along each of said side edges.
Claim 5
Dependent Claim
39 words
A container according to claim 1 which comprises a fourth layer secured tothe other layers along the side edges and secured also at one end to said main side walls to form a pocket outside of said main walls.
Claim 6
Dependent Claim
21 words
A container according to claim 1 in which the valve layer is a folded continuation of one of said main walls.
Claim 7
Dependent Claim
70 words
A container according to claim 1 in which the main side walls of the container are fixed to each other continuously along both side edges and across the opposite end, the valve layer being secured at one end across its full width to a first one of said side walls and across its partial width and near but not at its opposite end to the other of said side walls.
Claim 8
Dependent Claim
65 words
A container according to claim 1 in which the vlave layer is a continuous folded part of one of said main side walls and is sealed across part of its width to the other side wall, also said other side wall comprising a continuing and folded sheet portion upturned and sealed to the side edges of both said main walls to form a pole-receiving pocket.
Claim 9
Dependent Claim
23 words
A container according to claim 1 having a single valve opening at one side only of the partial seal outside of the bag.
Claim 10
Dependent Claim
64 words
A container according to claim 1 formed of a single three-part folded sheeT of which a terminal part forms one main side wall, the other terminal part forms the other main side wall, and the intermediate part forms the valve layer, said valve layer being cut short of one end of said container to permit insertion of a filler tube beside the partial seal.
Claim 11
Dependent Claim
34 words
A container according to claim 9 which has a pole-receiving pocket formed by a layer of sheet material of rectangular form secured around three of its edges to one of said main wall layers.
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) | 1977-01-07 | 1977-07-09 | 1978-01-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-07 | 1981-07-09 | 1982-01-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-07 | 1985-07-09 | 1986-01-08 | $7700.00 | Window Closed / Lapsed |