Patent US3734044A successfully refreshed from Google Patents.
US3734044A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sealed container assembly and method of making same
Assignee: Individual
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Filing: 1969-12-22
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Granted: 1973-05-22
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Expires: 1989-12-22
Abstract
Abstract Easily opened sealed container comprising a rigid container body preferably having an opening provided with a beaded edge, a rigid outer cover for the opening, the outer cover being readily releasably mechanically interlocked over the opening, an inner peelable sealing diaphragm equipped with an integral pull-tab engaged between said outer cover and said edge, and a plasticized resinous sealant adhering said diaphragm to said edge. The sealant, preferably of a solventless heat-activated type, is characterized by relatively weak shear strength. The diaphragm is preferably cut from sheet material with areas to be cut from sheet ''''packed'''' to provide a quadrilateral ''''scrap'''' area from which an integral tab is formed.
Inventors
- 👤 R Asmus
- 👤 A Jecker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 13:22
CPC Classifications
B; B21; B21D; B21D51/00; B21D51/16; B21D51/38; B21D51/383; B65; B65D; B65D51/00; B65D51/18; B65D51/20; B65D2251/00; B65D2251/0003; B65D2251/0006; B65D2251/0018; B65D2251/0068; B65D2251/0071
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
184 words
In the method of making a sealed container assembly comprising a container body whose vertical walls provide a circular top opening having a planar edge closed by a top member, the steps of a. forming said top by stamping the same from sheet material wherein a given top comprises an essentially circular closure area and an integral pull tab area and said areas are arranged in rows with the closure areas for other tops, said rows being arranged to locate four circular closure areas substantially tangentially to define an essentially quadrilateral area from which a pull tab area may be stamped integrally with its associated closure area, b. reversely folding the said pull tab area at its line of juncture to the periphery of said circular closure area to a position substantially parallel to the surface of said closure area, and c. thereafter joining the periphery of said top to the planar edge of the top opening of said container body with an organic sealant having greater tensile than shear strength and adhering the same to said periphery and edge to seal said opening.
Claim 2
Dependent Claim
184 words
In the method of making a sealed container assembly comprising a container body whose vertical walls provide a circular top opening having a planar edge closed by a top member, the steps of a. forming said top by stamping the same from sheet material wherein a given top comprises an essentially circular closure area and an integral pull tab area and said areas are arranged in rows with the closure areas for other tops, said rows being arranged to locate four circular closure areas substantially tangentially to define an essentially quadrilateral area from which a pull tab area may be stamped integrally with its associated closure area, b. reversely folding the said pull tab area at its line of juncture to the periphery of said circular closure area to a position substantially parallel to the surface of said closure area, and c. thereafter joining the periphery of said top to the planar edge of the top opening of said container body with an organic sealant having greater tensile than shear strength and adhering the same to said periphery and edge to seal said opening.
Claim 3
Dependent Claim
45 words
The method as defined in claim 1 in which the substantially tangent closure areas are arranged in offset rows to provide for a given closure area one essentially rectangular oblong area from which an integral pull tab of greater length than width may be formed.
Claim 4
Dependent Claim
109 words
The method as defined in claim 1 including the step, prior to joining the top to the top opening of said container body, of forming a peripherical groove in said top to receive the planar edge of said top opening, the opening of said groove being in the surface of said top opposite the surface toward which said pull tab area is folded, the depth of said groove being adjusted with respect to the tensile strength of said organic sealant whereby the seal between said top and planar opening will, in the absence of external forces, withstand the internal pressures which the can body is otherwise to be subjected.
Claim 5
Dependent Claim
34 words
A method as defined in claim 1, including the step of assembling said sealed container with a lid enclosing said top and seal and connected to said container body with a releasably removable connection.
Claim 6
Dependent Claim
36 words
A method as defined in claim 1 in which said resinous sealant is a vinyl chloride plastisol and including the step of fusing said plastisol with the sealant located between said top and said planar edge.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-05-21 | 1976-11-20 | 1977-05-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-05-21 | 1980-11-20 | 1981-05-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-05-21 | 1984-11-20 | 1985-05-22 | $7700.00 | Window Closed / Lapsed |