US4057022A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vessel having a pattern-molded bottom, a manufacturing process therefor
Assignee: Toyota Motor Corp
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Filing: 1976-06-01
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Granted: 1977-11-08
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Expires: 1996-06-01
Abstract
Abstract A vessel having a pattern-molded bottom formed by a process of molding a pattern on the part of a flat blank which is to become the bottom of a vessel, holding the rest of the blank in such a manner that the molded pattern may not be affected by subsequent working of the part of the blank other than the pattern-molded part, and then forming the side wall of the vessel by drawing the rest of the blank.
Inventors
- 👤 Kenji Koshino
- 👤 Masayasu Itoh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 13:29
CPC Classifications
B; B21; B21D; B21D22/00; B21D22/20; B21D51/00; B21D51/16; B21D51/18
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
74 words
A process of manufacturing a vessel with a pattern-molded bottom, said process being characterized by the following steps: molding a pattern on adequate area of a flat blank in the part thereof to become the vessel bottom; clamping an external part of said blank only outside of said molded pattern; and forming the side wall of the vessel by drawing a part outside the clamped part of said blank while said clamping is maintained.
Claim 2
Dependent Claim
74 words
A process of manufacturing a vessel with a pattern-molded bottom, said process being characterized by the following steps: molding a pattern on adequate area of a flat blank in the part thereof to become the vessel bottom; clamping an external part of said blank only outside of said molded pattern; and forming the side wall of the vessel by drawing a part outside the clamped part of said blank while said clamping is maintained.
Claim 3
Dependent Claim
22 words
The process of claim 1, wherein the pattern molded on the vessel bottom is one of a louvered, punched and embossed one.
Claim 4
Dependent Claim
18 words
The process of claim 1, wherein said vessel blank is held between two clamping planes with staggered projections.
Claim 5
Dependent Claim
36 words
The process of claim 3, wherein said vessel blank is held between two clamping planes with parallel portions having 2.5-3.5 times the thickness of said blank and projection length 0.7-1.3 times the thickness of said blank.
Claim 6
Dependent Claim
31 words
The process of claim 1, wherein said vessel blank is held between two clamping planes each of which are provided with a recess which faces the pattern-molded area of said blank.
Claim 7
Dependent Claim
43 words
The process of claim 1, wherein the drawing of the vessel side wall is done while the outside portion of said blank is being held between two clamping planes which are parallel to said blank area and are movable at right angles thereto.
References Cited (Backward Citations)
US2899922A
Cited
US1826559A
Cited
US1974891A
Cited
US2429376A
Cited
US3144974A
Cited
US3550421A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-11-07 | 1981-05-09 | 1981-11-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-11-07 | 1985-05-09 | 1985-11-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-11-07 | 1989-05-09 | 1989-11-08 | $7700.00 | Window Closed / Lapsed |