US3954049A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making flexible bag
Assignee: TOWER PRODUCTS Inc A CORP OF
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Filing: 1973-11-09
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Granted: 1976-05-04
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Expires: 1993-11-09
Abstract
Abstract A flexible bag construction and a method for producing the bag. The construction is formed from flexible plastic films located in overlying relationship with one film defining a return portion having a free edge positioned inwardly from the top of the bag. A second free edge is defined by a separate film portion in spaced relationship relative to the first free edge. A flexible plastic strip is introduced between the return portion and the opposing film and this strip is heat sealed in place. The second free edge provides a means for inserting articles into the bag whereby the bag can be used for merchandising purposes, particularly after being sealed along the second free edge. An opening is preferably formed in the top of the bag extending through overlying film portions and the intermediate strip to provide means for suspending the bag.
Inventors
- 👤 Bernard F. Brieske
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 00:11
CPC Classifications
B; B65; B65D; B65D75/00; B65D75/52; B31; B31B; B31B70/00; B31B2155/00; B31B2155/001; B31B2155/0014; B31B2160/00; B31B2160/10; B31B70/26; B31B70/36; Y; Y10; Y10S; Y10S383/00; Y10S383/907; Y10S493/00; Y10S493/916; Y10S493/926
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
240 words
A method for the production of a plurality of individual bags from an elongated flexible plastic film which is adapted to be heat sealed, comprising the steps of providing an elongated single thickness of film, providing a folding means and feeding said sheet to the folding means to thereby locate film portions thereof in overlying relationship, the edge of one film portion extending substantially beyond the edge of the other film portion to thereby provide an exposed single thickness film portion, introducing a flexible strip onto said exposed film portion, providing a second folding means and folding said exposed film portion to provide a return portion therein, positioning the free edge of said return portion adjacent and parallel to a free edge of said other film portion, the folding of said exposed film portion locating said strip within said return portion, heat-sealing said film portions together and to the edge of said strip adjacent said free edge of the return portion to thereby confine said flexible strip within the return portion, thereafter severing bags one at a time while simultaneously heat-sealing the bags around the severed periphery thereof, said free edge of said other film portion remaining unsealed in each bag to permit the introduction of articles into the bag, and wherein said film and said strip are continuously fed in step-by-step fashion to the folding and heat-sealing means to provide for the continuous production of bags from the film.
Claim 2
Independent Claim
240 words
A method for the production of a plurality of individual bags from an elongated flexible plastic film which is adapted to be heat sealed, comprising the steps of providing an elongated single thickness of film, providing a folding means and feeding said sheet to the folding means to thereby locate film portions thereof in overlying relationship, the edge of one film portion extending substantially beyond the edge of the other film portion to thereby provide an exposed single thickness film portion, introducing a flexible strip onto said exposed film portion, providing a second folding means and folding said exposed film portion to provide a return portion therein, positioning the free edge of said return portion adjacent and parallel to a free edge of said other film portion, the folding of said exposed film portion locating said strip within said return portion, heat-sealing said film portions together and to the edge of said strip adjacent said free edge of the return portion to thereby confine said flexible strip within the return portion, thereafter severing bags one at a time while simultaneously heat-sealing the bags around the severed periphery thereof, said free edge of said other film portion remaining unsealed in each bag to permit the introduction of articles into the bag, and wherein said film and said strip are continuously fed in step-by-step fashion to the folding and heat-sealing means to provide for the continuous production of bags from the film.
Claim 3
Dependent Claim
34 words
A method in accordance with claim 1 including the step of forming an opening passing through said one film portion, said return portion and said strip to thereby provide means for suspending said bag.
Claim 4
Dependent Claim
38 words
A method in accordance with claim 1 wherein said edge of said return portion is positioned in spaced apart relationship relative to said edge of the other film portion whereby articles can be readily inserted in said bag.
Claim 5
Dependent Claim
31 words
A method in accordance with claim 1 including the step of printing decorative and informational material on said one film portion, said one film portion forming the front of said bag.
References Cited (Backward Citations)
US2878849A
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US2971874A
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US3148598A
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US3354795A
Cited
US3282173A
Cited
US3776798A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-05-04 | 1979-11-03 | 1980-05-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-05-04 | 1983-11-03 | 1984-05-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-05-04 | 1987-11-03 | 1988-05-04 | $7700.00 | Window Closed / Lapsed |