US4468811A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tamper-evident closure for bag
Assignee: Smith Brothers Whitehaven Ltd
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Filing: 1983-05-25
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Granted: 1984-08-28
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Expires: 2003-05-25
Abstract
Abstract A pouch comprises two opposed webs having respective side and bottom portions sealed together thereby leaving an unsealed end whereat one of the opposed webs extends beyond the free edge of the other of the opposed webs to form a flap. The flap is foldable onto over an edge portion of the other web. An area of pressure sensitive adhesive, which is disposed on the flap, extends through a position for normal folding of the flap, so that the flap is foldable within the area covered by the adhesive to bring that latter into direct sealing contact at the flap fold. The flap is foldable along a rupturable portion which extends across the width of the flap. The relatively readily rupturable portion, which defines a fold line, comprises a perforated line of weakness or a scored line of weakness.
Inventors
- 👤 Peter M. Shaw
- 👤 Friedhelm Dahl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 13:14
CPC Classifications
B; B65; B65D; B65D33/00; B65D33/16; B65D33/18; B65D33/20; A; A61; A61B; A61B50/00; A61B50/30; B65D75/00; B65D75/52; B65D75/58; A61B2050/002; A61B2050/314; Y; Y10; Y10S; Y10S428/00; Y10S428/916; Y10T; Y10T428/00; Y10T428/15
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
97 words
A pouch comprising two opposed webs having respective side and bottom portions sealed together thereby leaving an unsealed end whereat one of said opposed webs extends beyond the free edge of the other of said opposed webs to form a flap foldable onto over an edge portion of the other web, the flap having disposed thereon an area of adhesive means extending through a position for normal folding of the flap, so that the flap is foldable within the area covered by said adhesive means to bring that latter into direct sealing contact at the flap fold.
Claim 2
Dependent Claim
97 words
A pouch comprising two opposed webs having respective side and bottom portions sealed together thereby leaving an unsealed end whereat one of said opposed webs extends beyond the free edge of the other of said opposed webs to form a flap foldable onto over an edge portion of the other web, the flap having disposed thereon an area of adhesive means extending through a position for normal folding of the flap, so that the flap is foldable within the area covered by said adhesive means to bring that latter into direct sealing contact at the flap fold.
Claim 3
Dependent Claim
24 words
A pouch as claimed in claim 1, wherein the flap is foldable along a rupturable portion which extends across the width of the flap.
Claim 4
Dependent Claim
30 words
A pouch as claimed in claim 2, wherein the relatively readily rupturable portion, which defines a fold line, comprises a perforated line of weakness or a scored line of weakness.
Claim 5
Dependent Claim
14 words
A pouch as claimed in claim 1, wherein the adhesive means is pressure sensitive.
Claim 6
Dependent Claim
33 words
A pouch as claimed in claim 4, wherein the adhesive means comprises a pressure sensitive adhesive tape having at least one release liner, the tape being at least a single coated transfer tape.
Claim 7
Dependent Claim
16 words
A pouch as claimed in claim 5, wherein the tape is a double coated transfer tape.
Claim 8
Dependent Claim
33 words
A pouch as claimed in claim 5, wherein the adhesive tape is spaced from the edge of the other of said opposed webs by a distance varying between 4 mm and 6 mm.
Claim 9
Dependent Claim
94 words
A pouch as claimed in claim 7, wherein the spacing permits a portion of the adhesive tape to contact a portion of the one of said opposed webs, as well as the other of said opposed webs, on folding of the flap along the fold line to close and seal the pouch, said contact serving as a telltale if the pouch has been opened and the seal broken, as the holding or contacting strength of the adhesive will tear the one of said opposed webs if the pouch is opened at the seal area.
Claim 10
Dependent Claim
43 words
A pouch as claimed in claim 3, wherein the relatively readily rupturable portion is spaced from the edge of the adhesive tape adjacent to the edge of the other of said opposed webs by a distance varying between 2 mm and 4 mm.
Claim 11
Dependent Claim
62 words
A pouch as claimed in claim 9, wherein the spacing permits a portion of the adhesive tape on one side of the rupturable portion to contact a portion of the adhesive tape on the other side of the rupturable portion, on folding of the flap along the fold line to close and seal the pouch, so as to provide a secure seal.
Claim 12
Dependent Claim
33 words
A pouch as claimed in claim 6 wherein the adhesive tape is spaced from the edge of the other of said opposed webs by a distance varying between 4 mm and 6 mm.
Claim 13
Dependent Claim
43 words
A pouch as claimed in claim 5 wherein the relatively readily rupturable portion is spaced from the edge of the adhesive tape adjacent to the edge of the other of said opposed webs by a distance varying between 2 mm and 4 mm.
Claim 14
Dependent Claim
43 words
A pouch as claimed in claim 6 wherein the relatively readily rupturable portion is spaced from the edge of the adhesive tape adjacent to the edge of the other of said opposed webs by a distance varying between 2 mm and 4 mm.
Claim 15
Dependent Claim
62 words
A pouch as claimed in claim 12 wherein the spacing permits a portion of the adhesive tape on one side of the rupturable portion to contact a portion of the adhesive tape on the other side of the rupturable portion, on folding of the flap along the fold line to close and seal the pouch, so as to provide a secure seal.
Claim 16
Dependent Claim
62 words
A pouch as claimed in claim 13 wherein the spacing permits a portion of the adhesive tape on one side of the rupturable portion to contact a portion of the adhesive tape on the other side of the rupturable portion, on folding of the flap along the fold line to close and seal the pouch, so as to provide a secure seal.
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) | 1987-08-28 | 1988-02-27 | 1988-08-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-08-28 | 1992-02-27 | 1992-08-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-08-28 | 1996-02-27 | 1996-08-28 | $7700.00 | Window Closed / Lapsed |