Patent US3795080A successfully refreshed from Google Patents.
US3795080A
Expired / Lapsed
US
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Method for packaging
Assignee: Agfa Gevaert NV
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Filing: 1971-10-26
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Granted: 1974-03-05
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Expires: 1991-10-26
Abstract
Abstract Hermetically sealed package for photographic sheet materials provided with one or two tearstrips which extend at the end of the package in the form of a loop. In order to facilitate the opening of the package in the dark a small part of the package is scored in the corners where the tearstrip extends, so that it can easily be torn off whereupon a sufficiently long extremity of the tearstrip is freed to open the package without difficulty.
Inventors
- 👤 A Smolderen
- 👤 J Cappuyns
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 14:58
CPC Classifications
B; B65; B65D; B65D75/00; B65D75/52; B65D75/58; B65D75/66; B65D75/68; B65B; B65B61/00; B65B61/18; B65B61/182; B31; B31B; B31B50/00; B31B50/74; B31B50/81; B31B50/812; B31B50/8125; B31B50/8126
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
247 words
In a method of wrapping flexible sheets, by the steps of feeding the sheets to be wrapped in successive spaced relation on a first traveling web of wrapper material, conveying a second web of such material above tHe path of said sheets in generally synchronous relation with their travel with said first web, folding opposite marginal portions of at least one of said webs inwardly over said sheets and inwardly contiguous web portions, securing together said contiguous web portions progressively along the length of the webs, sealing together the first and second web over transversely extending sealing bands situated between successive sheets, and finally severing the thus wrapped sheets from the traveling web assembly, along tranverse lines within said sealing bands, the improvement of laying a tearstrip ribbon on the upper surface of said first web along a line inwardly proximate to at least one of the marginal portions of said first web, advancing said web and tearstrip ribbon to a punching station, at said punching station simultaneously punching at each of successive spaced intervals along said web between said sheets a slit opening in said web and deflecting said tearstrip ribbon through said slit opening in the form of a loop projecting from the opposite side of the web, the spacing of said successive intervals coinciding with said sealing bands and each sealing band being of an extent in the direction of web travel such that the corresponding slit opening and loop are within its confines.
Claim 2
Dependent Claim
247 words
In a method of wrapping flexible sheets, by the steps of feeding the sheets to be wrapped in successive spaced relation on a first traveling web of wrapper material, conveying a second web of such material above tHe path of said sheets in generally synchronous relation with their travel with said first web, folding opposite marginal portions of at least one of said webs inwardly over said sheets and inwardly contiguous web portions, securing together said contiguous web portions progressively along the length of the webs, sealing together the first and second web over transversely extending sealing bands situated between successive sheets, and finally severing the thus wrapped sheets from the traveling web assembly, along tranverse lines within said sealing bands, the improvement of laying a tearstrip ribbon on the upper surface of said first web along a line inwardly proximate to at least one of the marginal portions of said first web, advancing said web and tearstrip ribbon to a punching station, at said punching station simultaneously punching at each of successive spaced intervals along said web between said sheets a slit opening in said web and deflecting said tearstrip ribbon through said slit opening in the form of a loop projecting from the opposite side of the web, the spacing of said successive intervals coinciding with said sealing bands and each sealing band being of an extent in the direction of web travel such that the corresponding slit opening and loop are within its confines.
Claim 3
Dependent Claim
37 words
A method according to claim 1 comprising adhering the tearstrip to said upper surface of said first web before the sheets to be packaged are placed thereon and at a point immediately downstream of said punching station.
Claim 4
Dependent Claim
34 words
A method according to claim 1 comprising scoring said sealing band of the package in inward proximity to said tearstrip ribbon along a line intersecting said severance line and terminating within the sealing band.
Claim 5
Dependent Claim
41 words
A method according to claim 3 wherein said sealing bands are formed by crimping the webs together with heating, with the crimped corrugations running generally normal to the direction of web travel, and said scoring extends generally perpendicular to said corrugations.
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) | 1977-03-04 | 1977-09-03 | 1978-03-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-03-04 | 1981-09-03 | 1982-03-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-03-04 | 1985-09-03 | 1986-03-05 | $7700.00 | Window Closed / Lapsed |