US4387830A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Side seam-coated tinplate welded can
Assignee: Teijin Ltd
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Filing: 1981-06-05
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Granted: 1983-06-14
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Expires: 2001-06-05
Abstract
Abstract Disclosed is a seam welded tinplate can having a side seam formed by welding, wherein the inner and outer surface portions of said side seam comprise an outermost layer formed of an oxide, which has a thickness of 50 to 400 A, and an intermediate layer formed mainly of an iron-tin alloy layer, which has a thickness corresponding to 5 to 100% of the thickness of the total tin layer, and a resin or resin composition containing a polar group selected from the group consisting of carbonyl, hydroxyl, ether and epoxy groups at a concentration of 10 to 2000 millimoles per 100 g of the resin is coated on at least one of said inner and outer surface portions of said side seam.
Inventors
- 👤 Yoichi Kitamura
- 👤 Seishichi Kobayashi
- 👤 Hiroshi Ueno
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 23:17
CPC Classifications
B; B65; B65D; B65D15/00; B05; B05D; B05D7/00; B05D7/14; B05D7/22; B05D7/227; B23; B23K; B23K11/00; B23K11/0006; B05D2350/00; B05D2350/60; B05D2350/63; B05D2350/65
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
121 words
A welded tinplate seam can having a side seam formed by welding, wherein the inner and outer surface portions of said side seam comprise an outermost layer formed of an oxide, which has a thickness of 50 to 400 A, and an intermediate layer formed mainly of an iron-tin alloy layer, which has a thickness corresponding to 5 to 100% of the thickness of the total tin layer, and a resin or resin composition containing a polar group selected from the group consisting of carbonyl, hydroxyl, ether and epoxy groups at a concentration of 10 to 2000 millimoles per 100 g of the resin is coated on at least one of said inner and outer surface portions of said side seam.
Claim 2
Dependent Claim
121 words
A welded tinplate seam can having a side seam formed by welding, wherein the inner and outer surface portions of said side seam comprise an outermost layer formed of an oxide, which has a thickness of 50 to 400 A, and an intermediate layer formed mainly of an iron-tin alloy layer, which has a thickness corresponding to 5 to 100% of the thickness of the total tin layer, and a resin or resin composition containing a polar group selected from the group consisting of carbonyl, hydroxyl, ether and epoxy groups at a concentration of 10 to 2000 millimoles per 100 g of the resin is coated on at least one of said inner and outer surface portions of said side seam.
Claim 3
Dependent Claim
32 words
A welded seam can as set forth in claim 1, wherein said resin is a thermosetting resin having a methylethyl ketone swelling elasticity of 1×10 4 to 1×10 8 dyne/cm 2 .
Claim 4
Dependent Claim
35 words
A welded seam can as set forth in claim 1, wherein said resin is a thermoplastic resin having a softening point of 50° to 300° C. as measured according to the ring and ball method.
Claim 5
Dependent Claim
21 words
A welded seam can as set forth in claim 1, wherein said resin has a density of 1.10 to 1.35 g/cc.
Claim 6
Dependent Claim
32 words
A welded seam can as set forth in claim 1, wherein said resin is a composition comprising an epoxy resin and other resin at a weight ratio of from 95/5 to 1/99.
Claim 7
Dependent Claim
26 words
A welded seam can as set forth in claim 5, wherein said other resin is a hydroxyl group-containing resin or an acid- or acid anhydride-containing resin.
Claim 8
Dependent Claim
25 words
A welded seam can as set forth in claim 1, wherein the iron-tin alloy layer has an Fe/Sn atomic ratio of from 1/1 to 1/2.
Claim 9
Dependent Claim
27 words
A welded seam can as set forth in claim 1, wherein the tinplate can blank has a plated tin amount of 0.56 to 11.2 mg/m 2 .
References Cited (Backward Citations)
US3982314A
Cited
US4054227A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-06-13 | 1986-12-13 | 1987-06-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-06-13 | 1990-12-13 | 1991-06-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-06-13 | 1994-12-13 | 1995-06-14 | $7700.00 | Window Closed / Lapsed |