US3616898A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Peelable seal package
Assignee: Abbott Laboratories
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Filing: 1969-09-08
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Granted: 1971-11-02
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Expires: 1989-09-08
Abstract
Abstract A package having a peelable seal and constructed of a pair of superimposed sheets or films heat-sealed to one another around their edges. In its preferred embodiment, the film comprises a composite formed of a polyolefin, such as a low-density polyethylene, laminated to an ionomer film which is in turn sealed to a paperboard. The invention includes a temperaturesensitive ink, printed in the heat seal area, the
Inventors
- 👤 Adrian B Massie
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 06:49
CPC Classifications
B; B65; B65D; B65D75/00; B65D75/28; B65D75/30; B65D75/32; B65D75/325; B65D75/326; B65D2575/00; B65D2575/28; B65D2575/30; B65D2575/32; B65D2575/3209; B65D2575/3218; B65D2575/3245; Y; Y10; Y10S; Y10S252/00; Y10S252/962
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
92 words
A peelable seal package comprising a pair of superimposed sheets heat sealed to one another around their edges to completely enclose and seal off a pocket between said sheets for retention of an article, said package having a thermoresponsive ink coated on the edge of one of said sheets coextensive with the portion of the sheets which are sealed together, the activation temperature of said ink being selected in the heat-sealing range of said sheets whereby upon sealing the sheets to one another, the effectiveness of the heat seal is readily apparent.
Claim 2
Dependent Claim
92 words
A peelable seal package comprising a pair of superimposed sheets heat sealed to one another around their edges to completely enclose and seal off a pocket between said sheets for retention of an article, said package having a thermoresponsive ink coated on the edge of one of said sheets coextensive with the portion of the sheets which are sealed together, the activation temperature of said ink being selected in the heat-sealing range of said sheets whereby upon sealing the sheets to one another, the effectiveness of the heat seal is readily apparent.
Claim 3
Dependent Claim
147 words
A peelable seal package comprising a pair of superimposed sheets, one of said sheets comprising a foldable paperboard, one portion of said paperboard having an opening therein, the other of said sheets comprising a composite film formed of a lamination of an ionomer film and a polyolefin film, the composite film projecting through the opening and attached to the periphery thereof to form a pocket for retention of an article when the paperboard is folded together, the ionomer film being sealed to the portion of the paperboard opposing the opening, and a thermoresponsive ink coated on the edge of one of said sheets coextensive with the portion of the sheets to be sealed together, the activation temperature of said ink being selected in the heat-sealing range of said sheets whereby, upon sealing the sheets to one another, the effectiveness of the heat seal will be readily apparent.
Claim 4
Dependent Claim
147 words
A peelable seal package comprising a pair of superimposed sheets, one of said sheets comprising a foldable paperboard, one portion of said paperboard having an opening therein, the other of said sheets comprising a composite film formed of a lamination of an ionomer film and a polyolefin film, the composite film projecting through the opening and attached to the periphery thereof to form a pocket for retention of an article when the paperboard is folded together, the ionomer film being sealed to the portion of the paperboard opposing the opening, and a thermoresponsive ink coated on the edge of one of said sheets coextensive with the portion of the sheets to be sealed together, the activation temperature of said ink being selected in the heat-sealing range of said sheets whereby, upon sealing the sheets to one another, the effectiveness of the heat seal will be readily apparent.
Claim 5
Dependent Claim
25 words
The peelable seal package of claim 2 wherein the composite film is formed of a lamination of an ionomer film and a low-density polyethylene film.
Claim 6
Dependent Claim
25 words
The peelable seal package of claim 3 wherein the foldable paperboard is coated on the side sealed to the ionomer film with a clay coating.
Claim 7
Dependent Claim
28 words
The peelable seal package of claim 3 wherein the activation temperature of the thermoresponsive ink is selected in the temperature range of about 320* F. to 450* F.
Claim 8
Dependent Claim
119 words
A peelable seal package comprising a pair of superimposed heat sealable sheets, one of said sheets comprising a foldable paperboard, one portion of said paperboard having an opening therein, the other of said sheets projecting through the opening in the paperboard and attached to the periphery thereof to form a pocket for retention of an article when the paperboard is folded together, and a thermoresponsive ink coated on the edge of one of said sheets coextensive with the portion of the sheets to be sealed together, the activation temperature of said ink being selected in the heat-sealing range of said sheets whereby, upon sealing the sheets to one another, the effectiveness of the heat seal will be readily apparent.
Claim 9
Dependent Claim
119 words
A peelable seal package comprising a pair of superimposed heat sealable sheets, one of said sheets comprising a foldable paperboard, one portion of said paperboard having an opening therein, the other of said sheets projecting through the opening in the paperboard and attached to the periphery thereof to form a pocket for retention of an article when the paperboard is folded together, and a thermoresponsive ink coated on the edge of one of said sheets coextensive with the portion of the sheets to be sealed together, the activation temperature of said ink being selected in the heat-sealing range of said sheets whereby, upon sealing the sheets to one another, the effectiveness of the heat seal will be readily apparent.
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) | 1974-11-01 | 1975-05-03 | 1975-11-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-01 | 1979-05-03 | 1979-11-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-01 | 1983-05-03 | 1983-11-02 | $7700.00 | Window Closed / Lapsed |