US3833166A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Valve bag
Assignee: NATIONAL TRUST Co A TRUST Co OF ONTARIO
•
Filing: 1973-01-24
•
Granted: 1974-09-03
•
Expires: 1993-01-24
Abstract
Abstract A valved plastics bag which has its valve adjacent and parallel to the top of the bag and is constructed of overlapping multi-ply panels in the front wall of the bag, the valve being formed between the panels, and one ply of the inner panel forming a sift-proof flap for the valve.
Inventors
- 👤 C Murray
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 05:09
CPC Classifications
B; B65; B65D; B65D31/00; B65D31/14; Y; Y10; Y10S; Y10S383/00; Y10S383/903
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
210 words
A plastics valved bag of the type comprising a back wall and a front wall joined together around the entire periphery of the bag, the front wall consisting of a first panel and a second panel, of greater combined width than the width of the back wall, said first panel at least partially overlapping said second panel throughout the length of the bag and said panels in their common area being joined together along a line substantially parallel with and at a distance from one end of the bag, thus forming a tubular self-closing filling sleeve having inner and outer walls and extending transversely of the bag adjacent to said one end thereof, with said first panel forming the outer wall and said second panel forming the inner wall of said filling sleeve, and being also joined together along at least one line extending from said first-mentioned line substantially to the opposite end of the bag, characterized in that said second panel consists of at least two plies that are non-coextensive with each other so that at least the inner end portion of the inner wall of said filling sleeve is formed of a number of plies that is less than the total number of plies in said second panel.
Claim 2
Dependent Claim
210 words
A plastics valved bag of the type comprising a back wall and a front wall joined together around the entire periphery of the bag, the front wall consisting of a first panel and a second panel, of greater combined width than the width of the back wall, said first panel at least partially overlapping said second panel throughout the length of the bag and said panels in their common area being joined together along a line substantially parallel with and at a distance from one end of the bag, thus forming a tubular self-closing filling sleeve having inner and outer walls and extending transversely of the bag adjacent to said one end thereof, with said first panel forming the outer wall and said second panel forming the inner wall of said filling sleeve, and being also joined together along at least one line extending from said first-mentioned line substantially to the opposite end of the bag, characterized in that said second panel consists of at least two plies that are non-coextensive with each other so that at least the inner end portion of the inner wall of said filling sleeve is formed of a number of plies that is less than the total number of plies in said second panel.
Claim 3
Dependent Claim
24 words
A bag as claimed in claim 1 in which the back wall and the front wall panels all have the same number of plies.
Claim 4
Dependent Claim
20 words
A bag as claimed in claim 2 in which the back wall and the front wall panels are all two-ply.
Claim 5
Dependent Claim
27 words
A bag as claimed in claim 1 in which the first front panel is a multi-ply panel and one of its edges is constituted by a fold.
Claim 6
Dependent Claim
12 words
A bag as claimed in claim 1 made of low-density polyethylene film.
Claim 7
Dependent Claim
46 words
A bag as claimed in claim 1 in which said first panel is in contact with the outermost ply of said second panel in the common area of the panels, and one ply of the second panel extends beyond the edge of the other plies thereof.
Claim 8
Dependent Claim
50 words
A bag as claimed in claim 2 in which the innermost ply of said first panel is in contact with the outermost ply of said second panel in the common area of the panels, and one ply of the second panel extends beyond the edge of the other plies thereof.
Claim 9
Dependent Claim
17 words
A bag as claimed in claim 2 wherein the plies are made of different heat-sealable plastics materials.
Claim 10
Dependent Claim
31 words
A bag as claimed in claim 8 wherein the innermost ply is formed of a plastics material that melts at a higher temperature than the plastics material of the outermost ply.
Claim 11
Dependent Claim
29 words
A bag as claimed in claim 8 wherein the innermost ply is formed of film of high-density polyethylene and the outermost ply is formed of film of low-density polyethylenE.
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) | 1977-09-02 | 1978-03-04 | 1978-09-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-02 | 1982-03-04 | 1982-09-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-02 | 1986-03-04 | 1986-09-03 | $7700.00 | Window Closed / Lapsed |