Patent US4712690A successfully refreshed from Google Patents.
US4712690A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Package having welded seam closure with hot melt thickening
Assignee: SIG Combibloc GmbH and Co KG
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Filing: 1986-06-05
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Granted: 1987-12-15
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Expires: 2006-06-05
Abstract
Abstract A package made out of a sheet material like paper, cardboard, etc., and with a welded-seam closure in the upper surface, especially a parallelepipedal package for liquid, made out of a material that is a composite of paper and plastic and having folded triangular flaps that can be folded down against the walls. In order to provide a package that is even easier to open and that in particular will be cheaper to manufacture with respect to the costs of materials, at least one side of the welded-seam closure has a thickening that facilitates ripping into it or ripping it out.
Inventors
- 👤 Benno Stohr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 13:26
CPC Classifications
B; B65; B65D; B65D5/00; B65D5/02; B65D5/06; B65D5/064; B65D5/065
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
80 words
In a parallelepipedal package having an upper surface and side walls and made by folding and sealing a scored blank of a sheet material, the package having a welded-seam closure at the upper surface and triangular flaps foldable down against the side walls, the improvement wherein at least one side of the welded-seam closure has a thickening comprising a hot melt coating and having a convex and tacky surface that facilitates ripping into the closure or ripping the closure out.
Claim 2
Dependent Claim
80 words
In a parallelepipedal package having an upper surface and side walls and made by folding and sealing a scored blank of a sheet material, the package having a welded-seam closure at the upper surface and triangular flaps foldable down against the side walls, the improvement wherein at least one side of the welded-seam closure has a thickening comprising a hot melt coating and having a convex and tacky surface that facilitates ripping into the closure or ripping the closure out.
Claim 3
Dependent Claim
22 words
A package according to claim 1, wherein the thickening is in the vicinity of at least one of the folded triangular flaps.
Claim 4
Dependent Claim
52 words
A package according to claim 1, wherein the triangular flaps each have a base adjacent the upper surface and a side facing a side wall when folded and wherein the thickening is at the base of one of the triangular flaps near a scored line on the side facing the side wall.
Claim 5
Dependent Claim
23 words
A package according to claim 3, wherein the folded-seam closure extends over the triangular flaps and the thickening is immediately adjacent the welded-seam.
Claim 6
Dependent Claim
16 words
A package according to claim 1, wherein the thickening is in the form of a dot.
Claim 7
Dependent Claim
16 words
A package according to claim 1, wherein the thickening is in the form of a streak.
Claim 8
Dependent Claim
19 words
A package according to claim 6, wherein the streak extends parallel to a peripheral edge of the welded-seam closure.
Claim 9
Dependent Claim
25 words
A package according to claim 1, wherein the welded-seam closure has two sides and the thickening is present on both sides of the welded-seam closure.
Claim 10
Dependent Claim
58 words
A package according to claim 1, wherein the welded-seam closure extends over the triangular flaps and has an inside surface when the triangular flaps are folded down and the thickening is on the inside surface of the closure at one flap and also serves to fasten the one folded triangular flap to the side wall of the package.
Claim 11
Dependent Claim
74 words
A package according to claim 1, wherein the welded-seam closure extends over the triangular flaps and the flaps have a base adjacent the upper surface and further comprising a scored line on the welded-seam closure superposed on the base of at least one triangular flap when folded, wherein the thickening is on one side of the scored line and further comprising at least one more thickening on the other side of the scored line.
Claim 12
Dependent Claim
22 words
A package according to claim 1, wherein the seam is provided with one of an incision, notch and perforation to facilitate rupture.
Claim 13
Dependent Claim
14 words
The package according to claim 1, wherein the sheet material comprises plastic coated cardboard.
Claim 14
Dependent Claim
126 words
In a parallelepipedal package having an upper surface and side walls and made by folding and sealing a scored blank of a sheet material, the package having a welded-seam closure at the upper surface and triangular flaps foldable down against the side walls, the improvement wherein at least one side of the welded-seam closure has a thickening having a convex and tacky surface that facilitates ripping into the closure or ripping the closure out, wherein the welded-seam closure extends over the triangular flaps and has an inside surface when the triangular flaps are folded down and the thickening is on the inside surface of the closure at one flap and also serves to fasten the one folded triangular flap to the side wall of the package.
Claim 15
Dependent Claim
126 words
In a parallelepipedal package having an upper surface and side walls and made by folding and sealing a scored blank of a sheet material, the package having a welded-seam closure at the upper surface and triangular flaps foldable down against the side walls, the improvement wherein at least one side of the welded-seam closure has a thickening having a convex and tacky surface that facilitates ripping into the closure or ripping the closure out, wherein the welded-seam closure extends over the triangular flaps and has an inside surface when the triangular flaps are folded down and the thickening is on the inside surface of the closure at one flap and also serves to fasten the one folded triangular flap to the side wall of the package.
Claim 16
Dependent Claim
88 words
In a parallelepipedal package having an upper surface and side walls and made by folding and sealing a scored blank of a sheet material, the package having a welded-seam closure at the upper surface and triangular flaps foldable down against the side walls, the improvement wherein the sheet material comprises plastic coated cardboard, at least one side of the welded-seam closure has a thickening comprising a dot of hot melt coating having a convex and tacky surface that facilitates ripping into the closure or ripping the closure out.
Claim 17
Dependent Claim
88 words
In a parallelepipedal package having an upper surface and side walls and made by folding and sealing a scored blank of a sheet material, the package having a welded-seam closure at the upper surface and triangular flaps foldable down against the side walls, the improvement wherein the sheet material comprises plastic coated cardboard, at least one side of the welded-seam closure has a thickening comprising a dot of hot melt coating having a convex and tacky surface that facilitates ripping into the closure or ripping the closure out.
Claim 18
Dependent Claim
143 words
In a parallelepipedal package having an upper surface and side walls and made by folding and sealing a scored blank of a sheet material, the package having a welded-seam closure at the upper surface and triangular flaps foldable down against the side walls, the improvement wherein at least one side of the welded-seam closure has a thickening having a convex and tacky surface that facilitates ripping into the closure or ripping the closure out, wherein the welded-seam closure extends over the triangular flaps and the flaps have a base adjacent the upper surface and further comprising a scored line on the welded-seam closure superposed on the base of at least one triangular flap when folded, wherein the thickening is on one side of the scored line and further comprising at least one or more thickening on the other side of the scored line.
Claim 19
Dependent Claim
143 words
In a parallelepipedal package having an upper surface and side walls and made by folding and sealing a scored blank of a sheet material, the package having a welded-seam closure at the upper surface and triangular flaps foldable down against the side walls, the improvement wherein at least one side of the welded-seam closure has a thickening having a convex and tacky surface that facilitates ripping into the closure or ripping the closure out, wherein the welded-seam closure extends over the triangular flaps and the flaps have a base adjacent the upper surface and further comprising a scored line on the welded-seam closure superposed on the base of at least one triangular flap when folded, wherein the thickening is on one side of the scored line and further comprising at least one or more thickening on the other side of the scored line.
References Cited (Backward Citations)
NL51486C
Cited
BE506556A
Cited
US2185604A
Cited
FR1242877A
Cited
US3347444A
Cited
CA897124A
Cited
DE2214665A1
Cited
US3819106A
Cited
US3866782A
Cited
US4346299A
Cited
US4433784A
Cited
US4448326A
Cited
DE3301086A1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-12-14 | 1991-06-15 | 1991-12-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-12-14 | 1995-06-15 | 1995-12-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-12-14 | 1999-06-15 | 1999-12-15 | $7700.00 | Window Closed / Lapsed |