US4470511A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Quick opening envelope
Assignee: Mail Well Corp
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Filing: 1983-12-12
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Granted: 1984-09-11
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Expires: 2003-12-12
Abstract
Abstract A quick opening envelope which gives full access to its interior upon opening is disclosed. The envelope is formed from a blank constructed from a single sheet of flexible material having a plurality of fold lines defining a front panel, a back panel, two side flaps and a closure flap. The back panel is provided with a V-shaped array of die cut perforations, each of which includes an arc portion and a tangent portion. The V-shaped array of perforations enables neat and easy opening of the envelope.
Inventors
- 👤 David M. Meeker
- 👤 Harold R. Lillibridge
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 19:13
CPC Classifications
B; B65; B65D; B65D27/00; B65D27/32; B65D27/34
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
510 words
A quick opening paper envelope comprising: (a) substantially rectangular planar front panel having opposed inner and outer surfaces, a top edge, a bottom edge, and first and second opposed side edges; (b) first and second substantially identical side flaps hingedly connected respectively to said first and second side edges of said front panel, said first and second side flaps each having an inner and an outer surface, the inner surfaces of said first and second side flaps abutting the inner surface of said front panel; (c) a back panel having opposed inner and outer surfaces, a bottom edge, a top edge, and first and second opposed side edges, the bottom edge of said back panel being hingedly connected to the bottom edge of said front panel, the inner surface of said back panel being adhesively attached to the outer surfaces of said first and second side flaps respectively, said back panel including a two-legged V-shaped array of arcuate die cut perforations, the vertex of said V-shaped array of arcuate die cut perforations converging toward the bottom edge of said back panel, each said arcuate die cut perforation having its convex side generally facing the bottom edge of said back panel, the vertex of said V-shaped array of arcuate die cut perforations being defined by a semi-circular perforation which defines a pull tab for opening said quick opening envelope, each of said arcuate die cut perforations extending from said pull tab comprising an arcuate portion and a tangent portion, each of said tangent portions extending parallel to the bottom edge of said back panel and away from the nearest side edge of said back panel and away from the location on its associated arc portion closest to the bottom edge of said back panel, the arcuate portion of each arcuate die cut perforation in one leg of said V-shaped array being tangent to a first imaginary straight line extending upwardly at an acute angle from said semi-circular perforation toward a first upper corner of said envelope, and the arcuate portion of each arcuate die cut perforation in the other leg fo said V-shaped array being tangent to a second imaginaty straight line extending upwardly at an acute angle from said semi-circular perforation toward a second upper corner of said envelope; and (d) a closure flap having opposed inner and outer surfaces, a top edge and at least one sealing edge, said top edge of said closure flap being hingedly connected to the top edge of said front panel, an adhesive area disposed on the inner surface of said closure flap adjacent said sealing edge, the length of said adhesive area as measured parallel to the top edge of said closure flap being less than the distance between the arcuate perforations on said back panel most distant from the pull tab thereon, the distance from said top edge of said closure flap to the adhesive area on said closure flap being such that said closure flap may be adhesively secured to the outer surface of said back panel thereby closing said envelope.
Claim 2
Dependent Claim
510 words
A quick opening paper envelope comprising: (a) substantially rectangular planar front panel having opposed inner and outer surfaces, a top edge, a bottom edge, and first and second opposed side edges; (b) first and second substantially identical side flaps hingedly connected respectively to said first and second side edges of said front panel, said first and second side flaps each having an inner and an outer surface, the inner surfaces of said first and second side flaps abutting the inner surface of said front panel; (c) a back panel having opposed inner and outer surfaces, a bottom edge, a top edge, and first and second opposed side edges, the bottom edge of said back panel being hingedly connected to the bottom edge of said front panel, the inner surface of said back panel being adhesively attached to the outer surfaces of said first and second side flaps respectively, said back panel including a two-legged V-shaped array of arcuate die cut perforations, the vertex of said V-shaped array of arcuate die cut perforations converging toward the bottom edge of said back panel, each said arcuate die cut perforation having its convex side generally facing the bottom edge of said back panel, the vertex of said V-shaped array of arcuate die cut perforations being defined by a semi-circular perforation which defines a pull tab for opening said quick opening envelope, each of said arcuate die cut perforations extending from said pull tab comprising an arcuate portion and a tangent portion, each of said tangent portions extending parallel to the bottom edge of said back panel and away from the nearest side edge of said back panel and away from the location on its associated arc portion closest to the bottom edge of said back panel, the arcuate portion of each arcuate die cut perforation in one leg of said V-shaped array being tangent to a first imaginary straight line extending upwardly at an acute angle from said semi-circular perforation toward a first upper corner of said envelope, and the arcuate portion of each arcuate die cut perforation in the other leg fo said V-shaped array being tangent to a second imaginaty straight line extending upwardly at an acute angle from said semi-circular perforation toward a second upper corner of said envelope; and (d) a closure flap having opposed inner and outer surfaces, a top edge and at least one sealing edge, said top edge of said closure flap being hingedly connected to the top edge of said front panel, an adhesive area disposed on the inner surface of said closure flap adjacent said sealing edge, the length of said adhesive area as measured parallel to the top edge of said closure flap being less than the distance between the arcuate perforations on said back panel most distant from the pull tab thereon, the distance from said top edge of said closure flap to the adhesive area on said closure flap being such that said closure flap may be adhesively secured to the outer surface of said back panel thereby closing said envelope.
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) | 1987-09-11 | 1988-03-12 | 1988-09-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-09-11 | 1992-03-12 | 1992-09-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-09-11 | 1996-03-12 | 1996-09-11 | $7700.00 | Window Closed / Lapsed |