US3949901A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Shipping bag
Assignee: National Marineplastic Co Ltd
•
Filing: 1975-02-06
•
Granted: 1976-04-13
•
Expires: 1995-02-06
Abstract
Abstract A shipping bag for powder or granular material which is comprised of a square external bag of flexible sheet having an inlet at its top end and an outlet at its bottom end and a cylindrical internal casing of the same material as that of the external bag, said cylindrical internal casing at its circumference being joined with an inner wall of the external bag to form four corner spaces through four partitions of unjoined circumference of the internal casing which are respectively provided with a number of slits in multistage for passing the material into the corner spaces.
Inventors
- 👤 Shinko Tokita
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 00:46
CPC Classifications
B; B65; B65D; B65D88/00; B65D88/16; B65D88/1612; B65D88/1668; B65D88/1631
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
207 words
A shipping bag for powdered granular material which comprises an outer enclosure of flexible sheet material having an inner wall defining a chamber of rectangular cross section, said inner wall having four corner portions and planar sections intermediate said corner portions, the diametric distance between opposed planar sections being less than the diametric distance between opposed corner portions, an inner cylindrical casing of the same material as said outer enclosure and being coaxially disposed therewithin and joined at its circumference in sealing relation only to said planar sections of said inner wall intermediate said corner portions thereof leaving thereby four corner spaces each bounded by a corner portion and that part of said inner casing, forming a partition, spaced from the corner portion, each partition being formed with openings to enable passage of granular material, when present in the inner casing, from the inner casing through said openings into said corner portions, a bag inlet communicating with an upper end of the inner casing enabling the charging of a powder material thereinto, and a bag outlet communicating with a bottom end of said inner casing enabling discharge of a powder material therefrom, covering means for covering said inlet, and a closure means for closing off said outlet.
Claim 2
Dependent Claim
207 words
A shipping bag for powdered granular material which comprises an outer enclosure of flexible sheet material having an inner wall defining a chamber of rectangular cross section, said inner wall having four corner portions and planar sections intermediate said corner portions, the diametric distance between opposed planar sections being less than the diametric distance between opposed corner portions, an inner cylindrical casing of the same material as said outer enclosure and being coaxially disposed therewithin and joined at its circumference in sealing relation only to said planar sections of said inner wall intermediate said corner portions thereof leaving thereby four corner spaces each bounded by a corner portion and that part of said inner casing, forming a partition, spaced from the corner portion, each partition being formed with openings to enable passage of granular material, when present in the inner casing, from the inner casing through said openings into said corner portions, a bag inlet communicating with an upper end of the inner casing enabling the charging of a powder material thereinto, and a bag outlet communicating with a bottom end of said inner casing enabling discharge of a powder material therefrom, covering means for covering said inlet, and a closure means for closing off said outlet.
Claim 3
Dependent Claim
35 words
A shipping bag as claimed in claim 1, wherein the length of the inner casing is shorter than that of the outer enclosure to provide an upper space and a lower space in the bag.
Claim 4
Dependent Claim
38 words
A shipping bag as claimed in claim 1 wherein there are provided additional partitions, each formed with a plurality of slits, in the four corner spaces to form double spaces in said corner portions of the external bag.
Claim 5
Dependent Claim
31 words
A shipping bag as claimed in claim 1, wherein lifting means are provided at opposed sides of the outer wall of the outer enclosure for enabling lifting movement of the bag.
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) | 1979-04-13 | 1979-10-13 | 1980-04-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-04-13 | 1983-10-13 | 1984-04-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-04-13 | 1987-10-13 | 1988-04-13 | $7700.00 | Window Closed / Lapsed |