US3719318A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermoplastic bag
Assignee: Individual
•
Filing: 1970-10-19
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Granted: 1973-03-06
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Expires: 1990-10-19
Abstract
Abstract A thermoplastic bag is formed from a sheet of thermoplastic material which is folded and tucked to form a bottom gusset. The bottom gusset portion is sealed at opposite corners with an inverted V-shaped seal, and the sheet forming the partially formed bag is severed with a severing and welding medium along a line bisecting the V-shaped seal to form a bag which has a generally squared bottom. A plastic covered tin-tie fastener is secured to the face of a bag panel. When the bag is filled and closed, the ends of the tin-tie are bent upon itself and these bent ends are further bent upon themselves and tucked interiorly of the folded tucked side portions of the bag.
Inventors
- 👤 H Moran
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 23:35
CPC Classifications
B; B65; B65D; B65D31/00; Y; Y10; Y10S; Y10S383/00; Y10S383/903; Y10S383/905; Y10T; Y10T24/00; Y10T24/15; Y10T24/157
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
217 words
An open-mouth, bottom gusseted, side weld bag formed from sheet thermoplastic material, said bag comprising generally rectangular front and rear panels, a bottom gusset folded upwardly betWeen said panels from the lower peripheral edges thereof to a tucked folded line to define front and rear bottom gusset portions, a pair of continuous uninterrupted thermal sidewelds, each weld sealing all of the adjacent side edges of said front panel, rear panel, and bottom gusset portions together, a pair of heat sealed areas bonding the lower portions of each front panel with the front bottom gusset portion, and a pair of heat sealed areas bonding the lower portions of each rear panel to the rear bottom gusset portion, each bonded area extending from the lower fold line between each panel and associated bottom gusset portion angularly upwardly and outwardly over the intersection of the tucked fold line and thermal sideweld, to a point slightly above said intersection, each bonded area between each front panel and associated front bottom gusset portion being joined at its upper end and being continuous with the upper end of the adjacent bonded area between the rear panel and associated rear bottom gusset portion to thereby define a generally triangular shaped heat sealed section at each side of the bag when the bag is expanded.
Claim 2
Dependent Claim
217 words
An open-mouth, bottom gusseted, side weld bag formed from sheet thermoplastic material, said bag comprising generally rectangular front and rear panels, a bottom gusset folded upwardly betWeen said panels from the lower peripheral edges thereof to a tucked folded line to define front and rear bottom gusset portions, a pair of continuous uninterrupted thermal sidewelds, each weld sealing all of the adjacent side edges of said front panel, rear panel, and bottom gusset portions together, a pair of heat sealed areas bonding the lower portions of each front panel with the front bottom gusset portion, and a pair of heat sealed areas bonding the lower portions of each rear panel to the rear bottom gusset portion, each bonded area extending from the lower fold line between each panel and associated bottom gusset portion angularly upwardly and outwardly over the intersection of the tucked fold line and thermal sideweld, to a point slightly above said intersection, each bonded area between each front panel and associated front bottom gusset portion being joined at its upper end and being continuous with the upper end of the adjacent bonded area between the rear panel and associated rear bottom gusset portion to thereby define a generally triangular shaped heat sealed section at each side of the bag when the bag is expanded.
Claim 3
Dependent Claim
217 words
An open-mouth, bottom gusseted, side weld bag formed from sheet thermoplastic material, said bag comprising generally rectangular front and rear panels, a bottom gusset folded upwardly betWeen said panels from the lower peripheral edges thereof to a tucked folded line to define front and rear bottom gusset portions, a pair of continuous uninterrupted thermal sidewelds, each weld sealing all of the adjacent side edges of said front panel, rear panel, and bottom gusset portions together, a pair of heat sealed areas bonding the lower portions of each front panel with the front bottom gusset portion, and a pair of heat sealed areas bonding the lower portions of each rear panel to the rear bottom gusset portion, each bonded area extending from the lower fold line between each panel and associated bottom gusset portion angularly upwardly and outwardly over the intersection of the tucked fold line and thermal sideweld, to a point slightly above said intersection, each bonded area between each front panel and associated front bottom gusset portion being joined at its upper end and being continuous with the upper end of the adjacent bonded area between the rear panel and associated rear bottom gusset portion to thereby define a generally triangular shaped heat sealed section at each side of the bag when the bag is expanded.
Claim 4
Dependent Claim
217 words
An open-mouth, bottom gusseted, side weld bag formed from sheet thermoplastic material, said bag comprising generally rectangular front and rear panels, a bottom gusset folded upwardly betWeen said panels from the lower peripheral edges thereof to a tucked folded line to define front and rear bottom gusset portions, a pair of continuous uninterrupted thermal sidewelds, each weld sealing all of the adjacent side edges of said front panel, rear panel, and bottom gusset portions together, a pair of heat sealed areas bonding the lower portions of each front panel with the front bottom gusset portion, and a pair of heat sealed areas bonding the lower portions of each rear panel to the rear bottom gusset portion, each bonded area extending from the lower fold line between each panel and associated bottom gusset portion angularly upwardly and outwardly over the intersection of the tucked fold line and thermal sideweld, to a point slightly above said intersection, each bonded area between each front panel and associated front bottom gusset portion being joined at its upper end and being continuous with the upper end of the adjacent bonded area between the rear panel and associated rear bottom gusset portion to thereby define a generally triangular shaped heat sealed section at each side of the bag when the bag is expanded.
Claim 5
Dependent Claim
98 words
The bag as defined in claim 1 and an elongate tin-tie fastener member extending transversely of and secured to the bag adjacent the open mouth thereof, said fastener member including an elongate bendable strip of material such as metal that will tend to stay flat after folding, elongate thermoplastic sheet covering said strip and being bonded thereto and extending laterally from a longitudinal edge thereof, said lateral extension of the thermoplastic sheet of said fastener member having its central portion only heat sealed to the part of one of said panels forming a face of the opened bag.
Claim 6
Dependent Claim
33 words
The bag as defined in claim 2 wherein said tin-tie fastener member has a length approximating but slightly smaller than the width of said panels when the bag is in the unexpanded condition.
Claim 7
Dependent Claim
63 words
The bag as defined in claim 1 wherein the joined continuous upper end of each bonded area, which defines the apical portion of the triangular shaped heat sealed section at each side of the bag when the bag is expanded, is of arcuate configuration and extends arcuately from slightly below the tucked fold line to a point slightly above the median fold line.
Claim 8
Dependent Claim
32 words
The bag as defined in claim 1 wherein the bonded area which defines each generally triangular shaped heat sealed section at each side of the bag is of generally inverted V-shaped configuration.
Claim 9
Dependent Claim
178 words
In an open mouth bag formed of thermoplastic material and including front and rear panels, an elongate substantially rectangular tin-tie fastener member extending transversely of and secured to the bag adjacent the open mouth, said fastener member including an elongate bendable strip of material, such as metal that will stay flat after folding, elongate thermoplastic sheet covering said strip and being bonded thereto and extending laterally from a longitudinal edge thereof, said thermoplastic sheet having a thickness dimension within the range of substantially 0.0005 inches and 0.010 inches, said lateral extension of the thermoplastic sheet of said fastener member having its central portion only, heat sealed to the part of one of said panels forming a face of the opened bag, said fastener member projecting beyond the sides of the bag when the latter is in the expanded condition, whereby the upper portions of the bag panels may be folded and wound upon the fastener member and the end portions of the fastener member thereafter inwardly bent upon itself to neatly close and open end of the bag.
Claim 10
Dependent Claim
178 words
In an open mouth bag formed of thermoplastic material and including front and rear panels, an elongate substantially rectangular tin-tie fastener member extending transversely of and secured to the bag adjacent the open mouth, said fastener member including an elongate bendable strip of material, such as metal that will stay flat after folding, elongate thermoplastic sheet covering said strip and being bonded thereto and extending laterally from a longitudinal edge thereof, said thermoplastic sheet having a thickness dimension within the range of substantially 0.0005 inches and 0.010 inches, said lateral extension of the thermoplastic sheet of said fastener member having its central portion only, heat sealed to the part of one of said panels forming a face of the opened bag, said fastener member projecting beyond the sides of the bag when the latter is in the expanded condition, whereby the upper portions of the bag panels may be folded and wound upon the fastener member and the end portions of the fastener member thereafter inwardly bent upon itself to neatly close and open end of the bag.
Claim 11
Dependent Claim
30 words
The structure defined in claim 6 wherein said tin-tie fastener member has its ends bent upon itself to present smooth end edges that will not puncture the filled closed bag.
Claim 12
Dependent Claim
32 words
The structure defined in claim 6 wherein said tin-tie fastener member has its length approximating but slightly smaller than the width of said panels when the bag is in the unexpanded condition.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-03-05 | 1976-09-04 | 1977-03-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-03-05 | 1980-09-04 | 1981-03-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-03-05 | 1984-09-04 | 1985-03-06 | $7700.00 | Window Closed / Lapsed |