US4268336A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of manufacturing containers
Assignee: Akerlund and Rausing AB
•
Filing: 1979-04-02
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Granted: 1981-05-19
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Expires: 1999-04-02
Abstract
Abstract A method for manufacturing retortable cans is taught which includes the step of cable extruding a tube of plastic. Subsequently, a substantially gas-tight material is laminated to the outside of the tube and a plastic layer is laminated to the layer of substantially gas-tight material. Preferably, the gas-tight material comprises a metallic foil.
Inventors
- 👤 Lars-Eric Piltz
- 👤 Bo T. Quist
- 👤 Folke Kiellarson
- 👤 Siwer Mansson
- 👤 Bengt Nilsson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 16:31
CPC Classifications
B; B29; B29C; B29C45/00; B29C45/14; B29C45/14778; B29C45/14811; B29C48/00; B29C48/03; B29C48/09; B29C48/25; B29C48/88; B29C48/90; B29C48/901; B29C48/903; B29C48/905; B29C51/00; B29C51/16; B29C63/00; B29C63/02; B29C63/04; B29C63/12; B29C63/14; B29C65/00; B29C65/02; B29C65/34; B29C65/36; B29C65/3604; B29C65/3644; B29C65/3656; B29C65/3672; B29C65/3676; B29C65/368; B29C66/00; B29C66/01; B29C66/05; B29C66/10; B29C66/12; B29C66/124; B29C66/1244; B29C66/12441; B29C66/1246; B29C66/12469; B29C66/50; B29C66/51; B29C66/54; B29C66/543; B29C66/5432; B29C66/545; B29C66/63; B29C66/70; B29C66/71; B29C66/72; B29C66/723; B29C66/7232; B29C66/72321; B29C66/80; B29C66/83; B29C66/832; B29C66/8322; B29C66/834; B29C66/8341; B29C66/83411; B29C69/00; B32; B32B; B32B15/00; B32B15/04; B32B15/08; B65; B65D; B65D11/00; B65D11/20; B65D17/00; B65D17/28; B65D17/401; B65D17/4011; B29C2791/00; B29C2791/004; B29C2791/006; B29C48/001; B29C48/0017; B29C48/0018; B29C48/0019; B29C48/0022; B29C48/07; B29C48/885; B29C48/904; B29C48/911; B29C48/9115; B29C48/912; B29C66/82; B29C66/822; B29C66/8221; B29K; B29K2705/00; B65D2517/00; B65D2517/0001; B65D2517/0058; B65D2517/008; B65D2517/0085; B65D2517/0088
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
139 words
A method for manufacturing a gas-tight package comprising the steps of: (a) extruding a round seamless tube of plastic; (b) reshaping the round tube into a desired cross-section; (c) exposing the outside of the tube to an outer vacuum simultaneously with the step of reshaping; (d) lubricating and cooling the tube with water; (e) laminating a layer of metallic substantially gas-tight material to the outside of said tube; (f) laminating a plastic layer to the layer of metallic material; (g) cutting the laminated tube into pieces of predetermined lengths; (h) providing top and bottom parts, each comprising a laminate of a first plastic layer, an intermediate layer of metallic substantially gas-tight material, and a second plastic layer; and, (i) joining such top and bottom parts to one of said cross-cut lengths of tubing to produce a substantially gas-tight package.
Claim 2
Independent Claim
139 words
A method for manufacturing a gas-tight package comprising the steps of: (a) extruding a round seamless tube of plastic; (b) reshaping the round tube into a desired cross-section; (c) exposing the outside of the tube to an outer vacuum simultaneously with the step of reshaping; (d) lubricating and cooling the tube with water; (e) laminating a layer of metallic substantially gas-tight material to the outside of said tube; (f) laminating a plastic layer to the layer of metallic material; (g) cutting the laminated tube into pieces of predetermined lengths; (h) providing top and bottom parts, each comprising a laminate of a first plastic layer, an intermediate layer of metallic substantially gas-tight material, and a second plastic layer; and, (i) joining such top and bottom parts to one of said cross-cut lengths of tubing to produce a substantially gas-tight package.
Claim 3
Dependent Claim
25 words
The method according to claim 1 further including the step of applying a positive pressure to the interior of the tube during the extruding step.
Claim 4
Dependent Claim
46 words
A method according to claim 1 wherein the laminating steps (e) and (f) are combined by pre-laminating the substantially gas-tight material with the plastic layer and then pasting the pre-laminate to the inner extruded plastic layer and further including the step of (j) hardening the paste.
Claim 5
Independent Claim
22 words
The method according to any one of claims 1 through 2 and 3, wherein the substantially gas-tight material comprises a metallic foil.
Claim 6
Dependent Claim
33 words
A method according to claim 1 or 4, wherein the step of extruding a tube of plastic (a) comprises extruding a plastic tube having a wall thickness of from 0.4 to 0.8 mm.
Claim 7
Independent Claim
177 words
A method for manufacturing a gas-tight package comprising the steps of: (a) extruding a seamless tube of plastic; (b) laminating a layer of metallic substantially gas-tight material to the outside of said tube; (c) laminating a plastic layer to the layer of metallic material; (d) cutting the laminated tube into pieces of predetermined lengths; (e) providing top and bottom parts, each comprising a laminate of a first plastic layer, an intermediate layer of metallic substantially gas-tight material, and a second plastic layer, and wherein said top and bottom parts include indented portions having substantial identical peripheral configurations which correspond to the desired interior cross-sectional configuration of the package to be formed; and, (f) joining such top and bottom parts to one of said cross-cut lengths of tubing to produce a substantially gas-tight package, including inserting the said indented portions within the said cross-cut length of plastic tubing so that the perpheries of the indented portions abut the inner wall of the plastic tubing and cooperate therewith to define and maintain a desired cross-sectional configuration of the tubing.
Claim 8
Independent Claim
177 words
A method for manufacturing a gas-tight package comprising the steps of: (a) extruding a seamless tube of plastic; (b) laminating a layer of metallic substantially gas-tight material to the outside of said tube; (c) laminating a plastic layer to the layer of metallic material; (d) cutting the laminated tube into pieces of predetermined lengths; (e) providing top and bottom parts, each comprising a laminate of a first plastic layer, an intermediate layer of metallic substantially gas-tight material, and a second plastic layer, and wherein said top and bottom parts include indented portions having substantial identical peripheral configurations which correspond to the desired interior cross-sectional configuration of the package to be formed; and, (f) joining such top and bottom parts to one of said cross-cut lengths of tubing to produce a substantially gas-tight package, including inserting the said indented portions within the said cross-cut length of plastic tubing so that the perpheries of the indented portions abut the inner wall of the plastic tubing and cooperate therewith to define and maintain a desired cross-sectional configuration of the tubing.
Claim 9
Dependent Claim
31 words
A method according to claim 6, wherein the step of extruding a tube of plastic (a) comprises extruding a plastic tube having a wall thickness of from 0.4 to 0.8 mm.
Claim 10
Dependent Claim
18 words
A method according to claim 7, 1 or 6, wherein the substantially gas-tight material comprises a metallic foil.
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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) | 1984-05-18 | 1984-11-17 | 1985-05-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-05-18 | 1988-11-17 | 1989-05-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-05-18 | 1992-11-17 | 1993-05-19 | $7700.00 | Window Closed / Lapsed |