Patent US3868894A successfully refreshed from Google Patents.
US3868894A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for making two compartment envelopes
Assignee: Berlin and Jones Co Inc
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Filing: 1973-12-14
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Granted: 1975-03-04
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Expires: 1993-12-14
Abstract
Abstract This disclosure teaches a method for making two compartment envelopes each from a unitary sheet of paper. The sheet is provided with a rectangular back panel as well as side flaps, a front flap of less width than the back panel and a closure flap. A window is cut in the front flap and thereafter pressure sensitive adhesive is applied to a remote area of the closure flap as well as to the front flap about the window. Silicone coated release paper is applied over the adhesive on the closure flap and a patch of acetate film is applied to cover the window. The envelope is then gummed and folded side flap over side flap to define a first of the compartments and then front flap over side flaps to define a second of the compartments. The release paper permits the closure flap to be folded for convenient packaging. The front flap and the closure flap are folded along hinge lines and the side flaps extend beyond the hinge lines whereby the side flaps are doubled onto the back panel in folding of the front flap and the closure flap.
Inventors
- 👤 Charles S Watson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 07:38
CPC Classifications
B; B31; B31B; B31B70/00; B31B70/005; B31B2150/00; B31B2160/00; B31B2160/10; B31B2160/102; B31B2170/00; B31B2170/20; Y; Y10; Y10S; Y10S493/00; Y10S493/916; Y10S493/931
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
283 words
A method for making a two compartment envelope from a unitary sheet of paper having an inward side and an outward side and having a rectangular back, a first and a second side flap each hinged on opposite edges of and foldable against the inward side of the back panel and overlappable to form a first compartment, a front flap of less width than the back panel and hinged on a remaining edge of the back panel and foldable against the side flaps to form a second compartment, a forth edge hinged to a closure flap which folds over into contact with the front panel to enclose both the first and the second compartments, the method comprising steps of: advancing the sheet open with the inward side upward along a continuous path, printing with ink on the outward side of the sheet, die cutting a window in the front flap, applying pressure sensitive adhesive to the closure flap and to a margin of the front flap about the window, applying a strip of a release paper over the adhesive on the closure flap, applying a patch of a transparent film over the window and in contact with the adhesive on the front flap, drying the ink, applying gum to a remote margin of one of the side flaps, folding the side flaps against the inward side of the back panel with the ungummed flap overlapped by the gummed flap to define a first of the compartments, applying gum to a proximal margin and to lateral margins of the front flap, folding the front flap against the side flaps to define a second of the compartments, folding the closure flap against the front panel.
Claim 2
Independent Claim
283 words
A method for making a two compartment envelope from a unitary sheet of paper having an inward side and an outward side and having a rectangular back, a first and a second side flap each hinged on opposite edges of and foldable against the inward side of the back panel and overlappable to form a first compartment, a front flap of less width than the back panel and hinged on a remaining edge of the back panel and foldable against the side flaps to form a second compartment, a forth edge hinged to a closure flap which folds over into contact with the front panel to enclose both the first and the second compartments, the method comprising steps of: advancing the sheet open with the inward side upward along a continuous path, printing with ink on the outward side of the sheet, die cutting a window in the front flap, applying pressure sensitive adhesive to the closure flap and to a margin of the front flap about the window, applying a strip of a release paper over the adhesive on the closure flap, applying a patch of a transparent film over the window and in contact with the adhesive on the front flap, drying the ink, applying gum to a remote margin of one of the side flaps, folding the side flaps against the inward side of the back panel with the ungummed flap overlapped by the gummed flap to define a first of the compartments, applying gum to a proximal margin and to lateral margins of the front flap, folding the front flap against the side flaps to define a second of the compartments, folding the closure flap against the front panel.
Claim 3
Dependent Claim
47 words
The method of claim 1 and the front flap and the closure flap folded along hinge lines, the side flaps extending beyond the hinge lines whereby the side flaps are doubled onto the back panel both on the folding of the front flap and the closure flaps.
Claim 4
Dependent Claim
10 words
The method of claim 2 with the patch being acetate.
Claim 5
Dependent Claim
12 words
The method of claim 3 with the release paper being silicone coated.
References Cited (Backward Citations)
US3116010A
Cited
US3236439A
Cited
US3372861A
Cited
US3420432A
Cited
US3584545A
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US3522908A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-03-03 | 1978-09-02 | 1979-03-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-03 | 1982-09-02 | 1983-03-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-03 | 1986-09-02 | 1987-03-04 | $7700.00 | Window Closed / Lapsed |