US3970241A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flat bottom bag
Assignee: Individual
•
Filing: 1975-07-31
•
Granted: 1976-07-20
•
Expires: 1995-07-31
Abstract
Abstract The invention relates to a flat bottom plastic bag and to methods of forming the same in which the bag is provided with an initial closed bottom that is further sealed between the bottom and the sides to produce a double-sealed, double-thickness closure.
Inventors
- 👤 Violet M. Hanson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:36
CPC Classifications
B; B65; B65D; B65D31/00; B65D31/08; B31; B31B; B31B70/00; B31B70/26; B31B70/28
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
91 words
As an article of manufacture, a double-sealed flat bottom bag of heat sealable material comprising a seam heat sealing closed the bag bottom and defining opposite inwardly gusseted sides, said inwardly gusseted sides being sealed to the bag bottom by said sealing seam for automatically forming flaps in overlying relationship with said closed bottom when the bag bottom is pressed flat, and said overlying flaps and closed bottom being heat sealed together in their flat overlying relationship by further sealing means extending across the width of the bag and said flaps.
Claim 2
Dependent Claim
91 words
As an article of manufacture, a double-sealed flat bottom bag of heat sealable material comprising a seam heat sealing closed the bag bottom and defining opposite inwardly gusseted sides, said inwardly gusseted sides being sealed to the bag bottom by said sealing seam for automatically forming flaps in overlying relationship with said closed bottom when the bag bottom is pressed flat, and said overlying flaps and closed bottom being heat sealed together in their flat overlying relationship by further sealing means extending across the width of the bag and said flaps.
Claim 3
Dependent Claim
30 words
An article of manufacture as in claim 1, said further sealing means joining said closed bag bottom and gusseted sides together for substantially the full width of said gusseted sides.
Claim 4
Dependent Claim
38 words
An article of manufacturing as in claim 1, said flaps of said opposite gusseted sides having folds adjacent said closed bag bottom, and said further sealing means extending along and joining said folds to the adjacent bag bottom.
Claim 5
Dependent Claim
29 words
An article of manufacture as in claim 3, and said further sealing means also joining said closed bag bottom and opposite gusseted sides together along said opposite gusseted sides.
Claim 6
Dependent Claim
77 words
A double-sealed flat bottom bag of heat sealable material comprising opposed faces and opposed sides, a seam heat sealing closed the opposed faces together at the bottom with said opposed sides gusseted inward and heat sealed therebetween, further heat sealing means joining together preselected adjacent portions of said faces and sides for the width of said bag when the bottom of the bag is pressed flat and said faces and sides are positioned in adjacent overlying relationship.
Claim 7
Dependent Claim
77 words
A double-sealed flat bottom bag of heat sealable material comprising opposed faces and opposed sides, a seam heat sealing closed the opposed faces together at the bottom with said opposed sides gusseted inward and heat sealed therebetween, further heat sealing means joining together preselected adjacent portions of said faces and sides for the width of said bag when the bottom of the bag is pressed flat and said faces and sides are positioned in adjacent overlying relationship.
Claim 8
Dependent Claim
39 words
A double-sealed flat bottom bag as in claim 5, said further sealing means joining together adjacent portions of said faces and sides for substantially the full width of said sides when the bottom of the bag is pressed flat.
Claim 9
Dependent Claim
37 words
A double-sealed flat bottom bag as in claim 5, said further sealing means joining together the edges of said faces and the overlying edges of said sides formed when the bottom of the bag is pressed flat.
Claim 10
Dependent Claim
40 words
A double-sealed flat bottom bag as in claim 5, said further sealing means extending along folds of said inwardly gusseted sides to join the same to adjacent portions of said faces when the bottom of the bag is pressed flat.
Claim 11
Dependent Claim
40 words
A double-sealed flat bottom bag as in claim 8, said further sealing means joining together adjacent portions of said faces and sides in the direction of the width of said sides when the bottom of the bag is pressed flat.
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) | 1979-07-20 | 1980-01-19 | 1980-07-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-07-20 | 1984-01-19 | 1984-07-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-07-20 | 1988-01-19 | 1988-07-20 | $7700.00 | Window Closed / Lapsed |