Patent US2648176A successfully refreshed from Google Patents.
Patent US3591072A successfully refreshed from Google Patents.
US3591072A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Leakproof bag
Assignee: Natro Cellulosa SpA
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Filing: 1969-07-16
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Granted: 1971-07-06
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Expires: 1989-07-16
Abstract
Abstract A bag, which may be provided with a valve or other discharge or filling member, is made from a flat tube of sheet material having a pair of faces joined together at opposite sides. A pair of coplanar and similar trapezoidal flaps of the sheet material are formed on the faces with each flap having a broad base joined to the respective face along a respective junction line running transverse to and between the sides. The flaps each further have a narrow base which defines a fold line with a respective rectangular lip of the sheet material, both of the lips extending inwardly toward each other and serving as the eventual bottom or top surface of the bag. The tube is further provided with two inwardly bent corner portions which bridge between the flaps and is divided by an imaginary line into a triangular and a trapezoidal region. The triangular region has two sides coextensive with and joined to two respective confronting sides of the two flaps while its base coincides with the broad base of the trapezoidal region. Between each side of each trapezoidal region and the adjacent side of each lip is a small gore of the sheet material which lies between the lip and the trapezoidal region in the finished bag. A tape is glued over the free edges of the lips and extends beyond them onto the triangular corner regions to hold the bag tightly shut.
Inventors
- 👤 Aldo Sannino
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 16:52
CPC Classifications
B; B65; B65D; B65D31/00; B65D31/14; B65D31/142
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
325 words
A bag comprising: a flat tube of sheet material having a pair of faces joined together at opposite tube sides; a pair of substantially coplanar and geometrically similar trapezoidal flaps of said sheet material each defined by a broad flap base joined to one of said faces along a respective junction line transverse to and extending between said sides, a narrow flap base defining a fold line, and a pair of flap sides extending between said broad and narrow flap bases; a pair of substantially coplanar and geometrically similar rectangular lips of said sheet material each joined to one of said flaps along said fold line, said lips extending toward each other and each having a free edge and two opposite side edges; a respective inwardly bent corner portion of said sheet material at each of said tube sides bridging said flaps each of said corner portions including a triangular region having two sides coextensive with and attached to the corresponding flap sides and defining a vertex at the respective tube side and a corner base running substantially orthogonally between said narrow flap bases, and a trapezoidal region having a broad baSe coextensive with and joined to the corresponding corner base, and an opposite narrow base, each of said triangular regions and the respective trapezoidal region being flat and coplanar; a respective triangular gore of said sheet material having a first side attached to one of the sides of one of said trapezoidal regions and forming therewith a first crease inclined to the respective narrow base and a second side attached to the corresponding side edge of one of said lips and forming therewith a second crease extending orthogonally to said fold line each of said gores being sandwiched between one of said lips and one of said trapezoidal regions; and a tape strip of greater length than said free edges and bonded to said lips over said free edges and to said triangular portions.
Claim 2
Dependent Claim
325 words
A bag comprising: a flat tube of sheet material having a pair of faces joined together at opposite tube sides; a pair of substantially coplanar and geometrically similar trapezoidal flaps of said sheet material each defined by a broad flap base joined to one of said faces along a respective junction line transverse to and extending between said sides, a narrow flap base defining a fold line, and a pair of flap sides extending between said broad and narrow flap bases; a pair of substantially coplanar and geometrically similar rectangular lips of said sheet material each joined to one of said flaps along said fold line, said lips extending toward each other and each having a free edge and two opposite side edges; a respective inwardly bent corner portion of said sheet material at each of said tube sides bridging said flaps each of said corner portions including a triangular region having two sides coextensive with and attached to the corresponding flap sides and defining a vertex at the respective tube side and a corner base running substantially orthogonally between said narrow flap bases, and a trapezoidal region having a broad baSe coextensive with and joined to the corresponding corner base, and an opposite narrow base, each of said triangular regions and the respective trapezoidal region being flat and coplanar; a respective triangular gore of said sheet material having a first side attached to one of the sides of one of said trapezoidal regions and forming therewith a first crease inclined to the respective narrow base and a second side attached to the corresponding side edge of one of said lips and forming therewith a second crease extending orthogonally to said fold line each of said gores being sandwiched between one of said lips and one of said trapezoidal regions; and a tape strip of greater length than said free edges and bonded to said lips over said free edges and to said triangular portions.
Claim 3
Dependent Claim
39 words
The bag defined in claim 1, further comprising another flat tube of sheet material within the first-mentioned tube and protruding therefrom whereby a marginal portion of said other tube projects beyond said lips and is secured by said tapes.
Claim 4
Dependent Claim
39 words
The bag defined in claim 1 wherein said free edges of said lips are spaced apart to define a gap between them and said tape is also bonded to said trapezoidal regions between the free edges of said lips.
Claim 5
Dependent Claim
28 words
The bag defined in claim 1 wherein each of said gores is at least partially bonded flat against a confronting portion of the respective trapezoidal region overlain thereby.
Claim 6
Dependent Claim
16 words
The bag defined in claim 1, further comprising a tear-facilitating filament extending longitudinally under said tape.
Claim 7
Dependent Claim
33 words
The bag defined in claim 5 wherein said tape has at least one end formed with a notch in the vicinity of said filament, said filament having an end projecting in said notch.
Claim 8
Dependent Claim
97 words
The bag defined in claim 1 wherein said tube further comprises respective rectangles of said sheet material each having one side attached to one of the side edges of one of the lips, each of said gores having a third side coextensive with and joined to another side of said rectangle adjacent said one side of said rectangle, said corner portions each further including a rectangular tab of said sheet material substantially coplanar with the respective triangular and trapezoidal regions and having one side coextensive with and joined to said narrow base of the respective trapezoidal region.
Claim 9
Dependent Claim
14 words
The bag defined in claim 7 wherein said tab is bonded to said lips.
Claim 10
Dependent Claim
12 words
The bag defined in claim 7 wherein the lips are substantially contiguous.
Claim 11
Dependent Claim
39 words
The bag defined in claim 7 wherein said rectangular tab has a pair of opposite sides adjacent said one side thereof and of a length equal to that of the side of said rectangle opposite said one side thereof.
Claim 12
Dependent Claim
14 words
The bag defined in claim 1 wherein said triangular region is isosceles right triangle.
Claim 13
Dependent Claim
370 words
A valved bag comprising: a flat tube of sheet material having a pair of faces joined together at opposite tube sides; a pair of substantially coplanar and geometrically similar trapezoidal flaps of said sheet material each defined by a broad flap base joined to one of said faces along a respective junction line transverse to and extending between said sides, a narrow flap base defining a fold line, and a pair of flap sides extending between said broad and narrow flap bases; a pair of substantially coplanar and geometrically similar lips of said sheet material each joined to one of said flaps along said fold line, said lips extending toward each other and each having a free edge and two opposite side edges; a respective inwardly bent corner portion of said sheet material at each of said tube sides bridging said flaps, each of said corner portions including a triangular region having two sides coextensive with and attached to the corresponding flap sides and defining a vertex at the respective tube side and a corner base running substantially orthogonally between said narrow flap bases and a trapezoidal region having a broad base coextensive with and joined to the corresponding corner base, anD an opposite narrow base, each of said triangular regions and the respective trapezoidal region being substantially flat and coplanar; a pair of triangular gores of said sheet material at one end of said flaps and each having a first side attached to one of the sides of one of said trapezoidal regions and forming therewith a first crease inclined to the respective narrow base, and a second side attached to the corresponding side edge of one of said lips and forming therewith a second crease extending substantially orthogonally to said fold line, each of said gores being sandwiched between one of said lips and one of said trapezoidal regions; a valve tube at the other end of said flaps and overlain by said lips; and a tape strip of greater length than said free edges and bonded to said lips over said free edges and to said triangular portion at said one side of said flaps and to said valve tube at said other side of said flaps.
Claim 14
Dependent Claim
370 words
A valved bag comprising: a flat tube of sheet material having a pair of faces joined together at opposite tube sides; a pair of substantially coplanar and geometrically similar trapezoidal flaps of said sheet material each defined by a broad flap base joined to one of said faces along a respective junction line transverse to and extending between said sides, a narrow flap base defining a fold line, and a pair of flap sides extending between said broad and narrow flap bases; a pair of substantially coplanar and geometrically similar lips of said sheet material each joined to one of said flaps along said fold line, said lips extending toward each other and each having a free edge and two opposite side edges; a respective inwardly bent corner portion of said sheet material at each of said tube sides bridging said flaps, each of said corner portions including a triangular region having two sides coextensive with and attached to the corresponding flap sides and defining a vertex at the respective tube side and a corner base running substantially orthogonally between said narrow flap bases and a trapezoidal region having a broad base coextensive with and joined to the corresponding corner base, anD an opposite narrow base, each of said triangular regions and the respective trapezoidal region being substantially flat and coplanar; a pair of triangular gores of said sheet material at one end of said flaps and each having a first side attached to one of the sides of one of said trapezoidal regions and forming therewith a first crease inclined to the respective narrow base, and a second side attached to the corresponding side edge of one of said lips and forming therewith a second crease extending substantially orthogonally to said fold line, each of said gores being sandwiched between one of said lips and one of said trapezoidal regions; a valve tube at the other end of said flaps and overlain by said lips; and a tape strip of greater length than said free edges and bonded to said lips over said free edges and to said triangular portion at said one side of said flaps and to said valve tube at said other side of said flaps.
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) | 1974-07-05 | 1975-01-04 | 1975-07-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-07-05 | 1979-01-04 | 1979-07-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-07-05 | 1983-01-04 | 1983-07-06 | $7700.00 | Window Closed / Lapsed |