Patent US3608774A successfully refreshed from Google Patents.
US3608774A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Drawn can for accommodating conventional openers
Assignee: National Steel Corp
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Filing: 1970-01-07
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Granted: 1971-09-28
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Expires: 1990-01-07
Abstract
Abstract Provision is made for opening a seam-free body, two-piece can with conventional plow-type can openers while maintaining substantially the same diameter container at opposite longitudinal ends by forming an elongated necked-in portion at the open end of the seam-free body; the necked-in portion being of extended longitudinal length (approximately 1/2 -inch) to accommodate the drive wheel of a plow-type opener; and, the radial thickness and/or placement of the chime seam being such that the outer diameter of the chime seam is substantially equal to the outer diameter of the seam-free body.
Inventors
- 👤 William T Saunders
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 19:50
CPC Classifications
B; B65; B65D; B65D1/00; B65D1/12; B65D1/14; B65D1/16; B65D1/165; B65D17/00; B65D17/06; B65D17/08
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
187 words
A two-piece can comprising: a unitary can body of cylindrical configuration having a seamfree sidewall symmetrically spaced from a centrally located longitudinal axis of the cylindrical configuration and a seamfree end wall closing one end of the cylindrical configuration can body, and an end closure closing the remaining end of the cylindrical configuration can body, the end closure at such remaining end of the can body being joined to the sidewall by a chime seam, the can body being of substantially uniform diameter from its seam-free end wall to within a predetermined distance longitudinally of the end closure chime seam and being neckedin to a smaller diameter over the predetermined distance between the chime seam and the uniform diameter portion of the can body. the end closure chime seam having an external diameter substantially equal to that of the uniform diameter portion of the can body, the predetermined longitudinal distance of necked-in, smaller diameter sidewall having a length about one-half inch to permit reception of a drive wheel of a plow-type can opener between the end closure chime seam and the uniform diameter portion of the sidewall.
Claim 2
Dependent Claim
187 words
A two-piece can comprising: a unitary can body of cylindrical configuration having a seamfree sidewall symmetrically spaced from a centrally located longitudinal axis of the cylindrical configuration and a seamfree end wall closing one end of the cylindrical configuration can body, and an end closure closing the remaining end of the cylindrical configuration can body, the end closure at such remaining end of the can body being joined to the sidewall by a chime seam, the can body being of substantially uniform diameter from its seam-free end wall to within a predetermined distance longitudinally of the end closure chime seam and being neckedin to a smaller diameter over the predetermined distance between the chime seam and the uniform diameter portion of the can body. the end closure chime seam having an external diameter substantially equal to that of the uniform diameter portion of the can body, the predetermined longitudinal distance of necked-in, smaller diameter sidewall having a length about one-half inch to permit reception of a drive wheel of a plow-type can opener between the end closure chime seam and the uniform diameter portion of the sidewall.
Claim 3
Dependent Claim
21 words
The sheet metal can body of claim 1 in which the chime seam has a lateral thickness of about one-sixteenth inch.
Claim 4
Dependent Claim
37 words
The sheet metal can of claim 1 having a differential between nominal diameters of the uniform diameter portion of the can body and the necked-in portion of the can body, such diametrical differential comprising about one-eighth inch.
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) | 1974-09-27 | 1975-03-29 | 1975-09-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-27 | 1979-03-29 | 1979-09-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-27 | 1983-03-29 | 1983-09-28 | $7700.00 | Window Closed / Lapsed |