Patent US3898945A successfully refreshed from Google Patents.
US3898945A
Expired / Lapsed
US
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Method for making a lap side seam on a metal tubular boby
Assignee: Primerica Inc
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Filing: 1974-02-15
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Granted: 1975-08-12
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Expires: 1994-02-15
Abstract
Abstract An adhesively bonded, lap side seam of a primed metal, tubular body having a raw metal edge on the inside lap is provided with a protective thermoplastic resin coating on the raw metal edge of the inside lap and a thermoplastic adhesive wrapped around the resin coating and the interior and exterior surfaces of the inside lap.
Inventors
- 👤 Stanley Edward Rohowetz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 22:29
CPC Classifications
B; B29; B29C; B29C66/00; B29C66/70; B29C66/72; B29C66/723; B21; B21D; B21D51/00; B21D51/16; B21D51/26; B21D51/2676; B29C65/00; B29C65/48; B29C65/4805; B29C65/481; B29C65/4815; B29C65/50; B29C65/5064; B29C65/5071; B29C65/5085; B29C66/01; B29C66/05; B29C66/10; B29C66/11; B29C66/112; B29C66/1122; B29C66/40; B29C66/41; B29C66/43; B29C66/432; B29C66/4322; B29C66/7232; B29C66/72321; B65; B65D; B65D7/00; B65D7/12; B65D7/34; B65D7/38; B29C53/00; B29C53/36; B29C53/38; B29C66/71; B29L; B29L2009/00; B29L2009/003; Y; Y10; Y10T; Y10T156/00; Y10T156/10; Y10T156/1002; Y10T156/1036; Y10T156/1038; Y10T29/00; Y10T29/49; Y10T29/49826; Y10T29/49885; Y10T428/00; Y10T428/31504; Y10T428/31786
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
72 words
A method of fabricating an adhesively bonded, lap side seam of a primed metal, tubular body having a protected raw metal edge on the inside lap comprising the steps of: applying a bead of a hot melt of a protective, thermoplastic polyamide resin on the raw metal edge of the inside lap; and wrapping a thermoplastic polyamide adhesive around the resin coating and the interior and exterior surfaces of the inside lap.
Claim 2
Independent Claim
72 words
A method of fabricating an adhesively bonded, lap side seam of a primed metal, tubular body having a protected raw metal edge on the inside lap comprising the steps of: applying a bead of a hot melt of a protective, thermoplastic polyamide resin on the raw metal edge of the inside lap; and wrapping a thermoplastic polyamide adhesive around the resin coating and the interior and exterior surfaces of the inside lap.
Claim 3
Dependent Claim
41 words
The method of claim 1 wherein the wrapping step comprises extruding the adhesive onto the exterior surface of the inside lap with an overhang, and forcing the overhang around the resin coating and onto the interior surface of the inside lap.
Claim 4
Dependent Claim
14 words
The method of claim 2 wherein the forcing step comprises blowing with a gas.
Claim 5
Dependent Claim
24 words
The method of claim 3 additionally comprising impact bonding the adhesively wrapped inside lap to the outside lap to form the lap side seam.
Claim 6
Independent Claim
177 words
A method of fabricating an adhesively bonded, lap side seam of a primed metal tubular body having a protected raw metal edge on the inside lap comprising the steps of: providing metal sheet, both surfaces having applied thereto an epoxy-phenolic primer coating; forming said primed sheet into a tubular can body blank, said blank having a raw metal edge along at least one of its marginal portions; applying a protective thermoplastic polyamide resin in the form of a hot melt to at least the raw metal edge of the marginal portion of said primed body blank that is to form the inside lap; applying a thermoplastic polyamide adhesive in the form of a ribbon which wraps around the protective resin and the interior and exterior surfaces of the inside lap; and forming said body blank into a tubular can body, arranged to have a lap side seam wherein the primed interior metal surface within the seam is adjacent to and overlaps the primed opposed exterior surface within the seam and is bonded thereto by said thermoplastic adhesive.
Claim 7
Independent Claim
177 words
A method of fabricating an adhesively bonded, lap side seam of a primed metal tubular body having a protected raw metal edge on the inside lap comprising the steps of: providing metal sheet, both surfaces having applied thereto an epoxy-phenolic primer coating; forming said primed sheet into a tubular can body blank, said blank having a raw metal edge along at least one of its marginal portions; applying a protective thermoplastic polyamide resin in the form of a hot melt to at least the raw metal edge of the marginal portion of said primed body blank that is to form the inside lap; applying a thermoplastic polyamide adhesive in the form of a ribbon which wraps around the protective resin and the interior and exterior surfaces of the inside lap; and forming said body blank into a tubular can body, arranged to have a lap side seam wherein the primed interior metal surface within the seam is adjacent to and overlaps the primed opposed exterior surface within the seam and is bonded thereto by said thermoplastic adhesive.
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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) | 1978-08-11 | 1979-02-10 | 1979-08-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-08-11 | 1983-02-10 | 1983-08-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-08-11 | 1987-02-10 | 1987-08-12 | $7700.00 | Window Closed / Lapsed |