US3570751A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tear-open package
Assignee: Wyomissing Corp
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Filing: 1969-07-03
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Granted: 1971-03-16
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Expires: 1989-07-03
Abstract
Abstract A package formed by a sheet of flexible packaging material having a tear-open seam extending across a face or along an edge thereof. The tear-open seam is characterized by a flap formed by an edge of the package sheet and a tearable insert strip which secures the flap to the adjacent sheet edges. The method of making the package includes the steps of applying spaced transverse stripes of adhesive to a continuous flat web of packaging material, depositing articles to be packaged on the web between the applied adhesive stripes, folding the package web so that the edges thereof are disposed in overlying relation, introducing an adhesive coated insert web between the overlying web edges, sealing the transverse adhesive stripes, and cutting the web along the sealed adhesive stripes.
Inventors
- 👤 Robert J Trewella
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 10:19
CPC Classifications
B; B65; B65D; B65D75/00; B65D75/52; B65D75/58; B65D75/5827; B31; B31B; B31B70/00; B31B70/14; B31B70/16; B31B70/18; B65D75/40; B65D75/44; B65D75/46
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
119 words
In a package formed of flexible packaging material and including adjacent parallel edges, the improvemeNt of a tear-open seam comprising an insert strip of tearable material adhesively bonded to each of said adjacent edges, said insert strip having an unsecured region extending longitudinally thereof between the regions of adhesive attachment to said edges, one of said edges forming a flap which may be grasped to tear open said seam along the unsecured region of said insert strip said flap including a portion of said insert strip, the package side edges and the edges of said insert strip being mutually reinforced by their adhesive attachment thereby restricting the tearing of the seam to the unsecured region of said insert strip.
Claim 2
Dependent Claim
119 words
In a package formed of flexible packaging material and including adjacent parallel edges, the improvemeNt of a tear-open seam comprising an insert strip of tearable material adhesively bonded to each of said adjacent edges, said insert strip having an unsecured region extending longitudinally thereof between the regions of adhesive attachment to said edges, one of said edges forming a flap which may be grasped to tear open said seam along the unsecured region of said insert strip said flap including a portion of said insert strip, the package side edges and the edges of said insert strip being mutually reinforced by their adhesive attachment thereby restricting the tearing of the seam to the unsecured region of said insert strip.
Claim 3
Dependent Claim
20 words
The invention as claimed in claim 1 wherein said insert strip includes a longitudinal score line in said unsupported region.
Claim 4
Dependent Claim
19 words
The invention as claimed in claim 1 wherein said insert strip includes a fold line in said unsupported region.
Claim 5
Dependent Claim
25 words
The invention as claimed in claim 1 wherein said edges are in overlapped relation with said insert strip being bonded between the overlapped portions thereof.
Claim 6
Dependent Claim
34 words
The invention as claimed in claim 4 wherein said insert strip is folded along a longitudinal fold line in said unsupported region into a U-shape, said fold line being directed inwardly of said seam.
Claim 7
Dependent Claim
31 words
The invention as claimed in claim 5 wherein the underlying edge extends inwardly of said insert strip to prevent contact of the package contents with said insert strip during removal thereof.
Claim 8
Dependent Claim
178 words
A tear-open package comprising flexible packaging material having a pair of parallel side edges and a pair of parallel end edges perpendicular thereto, said material being folded along each of a pair of parallel fold lines parallel to and spaced from said side edges to provide an overlapping of said side edges, means forming a tear-open seam along said overlapped side edges, said means comprising an insert strip of tearable material disposed between and adhesively bonded to each of said overlapping side edges, said insert strip extending the length of said side edges and having an unsecured region extending longitudinally thereof between the areas of adhesive attachment to said side edges, one of said said edges and a portion of said insert strip forming a flap which may be grasped to tear open said seam, said side edges and the edges of said insert strip being mutually reinforced by their adhesive attachment to thereby restrict the tearing of the seam to the unsecured region of the insert strip, and means for sealing the end edges of said package.
Claim 9
Dependent Claim
178 words
A tear-open package comprising flexible packaging material having a pair of parallel side edges and a pair of parallel end edges perpendicular thereto, said material being folded along each of a pair of parallel fold lines parallel to and spaced from said side edges to provide an overlapping of said side edges, means forming a tear-open seam along said overlapped side edges, said means comprising an insert strip of tearable material disposed between and adhesively bonded to each of said overlapping side edges, said insert strip extending the length of said side edges and having an unsecured region extending longitudinally thereof between the areas of adhesive attachment to said side edges, one of said said edges and a portion of said insert strip forming a flap which may be grasped to tear open said seam, said side edges and the edges of said insert strip being mutually reinforced by their adhesive attachment to thereby restrict the tearing of the seam to the unsecured region of the insert strip, and means for sealing the end edges of said package.
Claim 10
Dependent Claim
25 words
The invention as claimed in claim 7 wherein said means for sealing the end edges of said package provides a peel-open seal of said edges.
Claim 11
Dependent Claim
34 words
The invention as claimed in claim 7 wherein said insert strip is folded along a longitudinal fold line in said unsupported region into a U-shaped, said fold line being directed inwardly of said seam.
Claim 12
Dependent Claim
32 words
The invention as claimed in claim 9 wherein the underlying side edge extends inwardly of said insert strip to prevent contact of the package contents with said insert strip during removal thereof.
Claim 13
Dependent Claim
20 words
The invention as claimed in claim 7 wherein said insert strip includes a longitudinal score line in said unsupported region.
Claim 14
Dependent Claim
126 words
A tear-open package comprising a sheet of flexible packaging material having a medial fold line therein defining one package edge, the sheet edges parallel with said fold line being in parallel overlying relation and comprising a tear-open seam, said tear-open seam comprising an insert strip of tearable material disposed between and adhesively bonded to each of said overlying side edges, said insert strip being folded along a longitudinal fold line into a U-shape, said fold line being directed inwardly of said seam, each of said sheet side edges and a portion of said insert strip forming a flap which may be grasped to tear open said seam along the fold line of said insert strip, and means for sealing the end edges of said package sheet.
Claim 15
Dependent Claim
126 words
A tear-open package comprising a sheet of flexible packaging material having a medial fold line therein defining one package edge, the sheet edges parallel with said fold line being in parallel overlying relation and comprising a tear-open seam, said tear-open seam comprising an insert strip of tearable material disposed between and adhesively bonded to each of said overlying side edges, said insert strip being folded along a longitudinal fold line into a U-shape, said fold line being directed inwardly of said seam, each of said sheet side edges and a portion of said insert strip forming a flap which may be grasped to tear open said seam along the fold line of said insert strip, and means for sealing the end edges of said package sheet.
Claim 16
Dependent Claim
207 words
A tear-open package comprising a sheet of flexible packaging material haVing a pair of parallel side edges and a pair of parallel end edges perpendicular thereto, said sheet being folded along each of a pair of parallel fold lines parallel to and spaced from said sheet side edges to form a package back panel and a pair of package front panels, one of said front panels being folded along a line parallel with said fold lines to form an outwardly overlying flap portion thereof, said latter fold line overlying the side edge of the other of said front panels, a strip of tearable material extending longitudinally along and adhesively bonded to each of said front panels, said strip extending the length of said side edges and having an unsecured region extending longitudinally thereof between the areas of adhesive attachment to said front panels, said strip being attached to said one panel along the flap portion thereof, said front panels and the edges of said strip of tearable material being mutually reinforced by their adhesive attachment whereby the application of force to said flap causes a tearing of said sheet along the unsecured region of said strip, and means for sealing the end edges of said package sheet.
Claim 17
Dependent Claim
207 words
A tear-open package comprising a sheet of flexible packaging material haVing a pair of parallel side edges and a pair of parallel end edges perpendicular thereto, said sheet being folded along each of a pair of parallel fold lines parallel to and spaced from said sheet side edges to form a package back panel and a pair of package front panels, one of said front panels being folded along a line parallel with said fold lines to form an outwardly overlying flap portion thereof, said latter fold line overlying the side edge of the other of said front panels, a strip of tearable material extending longitudinally along and adhesively bonded to each of said front panels, said strip extending the length of said side edges and having an unsecured region extending longitudinally thereof between the areas of adhesive attachment to said front panels, said strip being attached to said one panel along the flap portion thereof, said front panels and the edges of said strip of tearable material being mutually reinforced by their adhesive attachment whereby the application of force to said flap causes a tearing of said sheet along the unsecured region of said strip, and means for sealing the end edges of said package sheet.
Claim 18
Dependent Claim
18 words
The invention as claimed in claim 13 wherein said strip includes a score line in said unsecured region.
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) | 1974-03-15 | 1974-09-14 | 1975-03-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-03-15 | 1978-09-14 | 1979-03-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-03-15 | 1982-09-14 | 1983-03-16 | $7700.00 | Window Closed / Lapsed |