US3922984A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for reconditioning a container
Assignee: Greif International Holding BV
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Filing: 1973-07-03
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Granted: 1975-12-02
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Expires: 1993-07-03
Abstract
Abstract A technique for reconditioning a container including a spiral seam formed by an end wall and body wall of the container. The container is placed on a support to hold the end wall in an axial and radial direction with respect to the axis of the container. A tool is then moved towards an outer surface of the body wall to completely surround the body wall. The tool and surface are then relatively moved in opposite directions to unroll the seam, the body wall and end wall then being reshaped, cleaned and reconnected to form again a seam.
Inventors
- 👤 Reinder Zuideveld
- 👤 Mattheus Johannes Mart Coppens
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 17:13
CPC Classifications
B; B65; B65D; B65D7/00; B65D7/12; B65D7/34; B65D7/36; B21; B21D; B21D51/00; B21D51/16; B21D51/26; B21D51/2653; B21D51/2661; B23; B23P; B23P19/00; B23P19/04; B23P19/046
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
176 words
A method of reconditioning a container having end walls connected to a body wall, one of said end walls and said body wall having cylindrical end wall portions with flanged edges which are coiled about each other to form an outwardly directed seam, said seam, in cross-section, being in the form of a spiral, comprising: a. placing the container with said one end wall on a support means for supporting said one end wall in an axial direction and for supporting the interior of the cylindrical end portion of said one end wall in a radial direction with respect to the axis of the container; b. moving a tool towards an outer surface of said body wall to completely surround said body wall; c. relatively moving said tool and support means in opposite directions with respect to each other to completely unroll said seam; and d. connecting again said body wall and said one end wall with each other to form a seam after reshaping and cleaning of said body wall and said one end wall.
Claim 2
Independent Claim
176 words
A method of reconditioning a container having end walls connected to a body wall, one of said end walls and said body wall having cylindrical end wall portions with flanged edges which are coiled about each other to form an outwardly directed seam, said seam, in cross-section, being in the form of a spiral, comprising: a. placing the container with said one end wall on a support means for supporting said one end wall in an axial direction and for supporting the interior of the cylindrical end portion of said one end wall in a radial direction with respect to the axis of the container; b. moving a tool towards an outer surface of said body wall to completely surround said body wall; c. relatively moving said tool and support means in opposite directions with respect to each other to completely unroll said seam; and d. connecting again said body wall and said one end wall with each other to form a seam after reshaping and cleaning of said body wall and said one end wall.
Claim 3
Dependent Claim
26 words
The method of claim 1 wherein said tool has a working surface contacting said seam and said working surface is substantially perpendicular to said body wall.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-12-01 | 1979-06-02 | 1979-12-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-12-01 | 1983-06-02 | 1983-12-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-12-01 | 1987-06-02 | 1987-12-02 | $7700.00 | Window Closed / Lapsed |