Patent US4557888A successfully refreshed from Google Patents.
US4557888A
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US
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Method for the manufacture of packing containers and an arrangement for the realization of the method
Assignee: Tetra Laval Holdings and Finance SA
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Filing: 1983-01-19
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Granted: 1985-12-10
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Expires: 2003-01-19
Abstract
Abstract The invention relates to a method for the manufacture by means of shrink-forming of a packing container of orientation-stretched laminate comprising polyester and aluminium foil, the laminate being formed to a tube (14) and subsequently being made to shrink over a mandrel (10,28) to the intended shape.
Inventors
- 👤 Anders R. Rausing
- 👤 Erling I. Nilsson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 15:26
CPC Classifications
B; B29; B29D; B29D22/00; B29D22/003; B29C; B29C33/00; B29C33/44; B29C33/48; B29C33/50; B29C33/505; B29C61/00; B29C61/02; B29C61/025; B29C61/06; B29C61/0608; B29C61/0616; B29C65/00; B29C65/48; B29C65/4805; B29C65/481; B29C65/4815; B29C65/50; B29C65/5057; B29C65/66; B29C66/00; B29C66/01; B29C66/05; B29C66/10; B29C66/11; B29C66/112; B29C66/1122; B29C66/12; B29C66/122; B29C66/1222; B29C66/1224; B29C66/13; B29C66/131; B29C66/20; B29C66/24; B29C66/242; B29C66/2422; B29C66/24221; B29C66/40; B29C66/41; B29C66/43; B29C66/432; B29C66/4322; B29C66/49; B29C66/494; B29C66/50; B29C66/51; B29C66/53; B29C66/534; B29C66/5346; B29C66/53461; B29C66/53462; B29C66/70; B29C66/71; B29C66/72; B29C66/723; B29C66/7232; B29C66/72321; B29C66/7234; B29C66/72341; B29C66/73; B29C66/737; B29C66/7371; B29C66/73711; B29C66/73713; B29C66/73715; B29C66/532; B29C66/5324; B29C66/53245; B29C66/54; B29C66/542; B29K; B29K2067/00; B29K2705/00; B29K2705/02; B29K2995/00; B29K2995/0037; B29K2995/0049; B29K2995/005; B29K2995/0053; B29L; B29L2009/00; Y; Y10; Y10T; Y10T156/00; Y10T156/10; Y10T156/1002; Y10T156/1007; Y10T156/1008; Y10T156/1013; Y10T428/00; Y10T428/13; Y10T428/1328; Y10T428/1352; Y10T428/1355; Y10T428/1359
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
129 words
A method of manufacturing a container from a laminated web having a base layer of orientation-stretched polyester, a layer of metal foil, and at least one surface layer of glycol-modified polyester adjacent said base layer, said metal foil providing a gas barrier, said method comprising the steps of: providing a recess in said layer of metal foil along a first edge region of said web; forming said web into a tubular element with said first edge region and another edge region of said web overlapping such that said layer of metal foil of said other edge region is separated from said first edge region by said base and surface layers of said other edge region; bonding said overlapped first and other edge regions; and plastically deforming said tubular element.
Claim 2
Independent Claim
129 words
A method of manufacturing a container from a laminated web having a base layer of orientation-stretched polyester, a layer of metal foil, and at least one surface layer of glycol-modified polyester adjacent said base layer, said metal foil providing a gas barrier, said method comprising the steps of: providing a recess in said layer of metal foil along a first edge region of said web; forming said web into a tubular element with said first edge region and another edge region of said web overlapping such that said layer of metal foil of said other edge region is separated from said first edge region by said base and surface layers of said other edge region; bonding said overlapped first and other edge regions; and plastically deforming said tubular element.
Claim 3
Dependent Claim
17 words
The method in accordance with claim 1, wherein said layer of metal foil is formed from aluminum.
Claim 4
Dependent Claim
18 words
The method in accordance with claim 2, wherein said aluminum foil is formed approximately 5/1000 mm in thickness.
Claim 5
Dependent Claim
18 words
The method in accordance with claim 1, wherein said bonding step includes thermal fusing of said edge regions.
Claim 6
Dependent Claim
28 words
The method in accordance with claim 1, wherein said bonding step includes extruding a strand of glycol-modified polyester between said edge regions and pressing said edge regions together.
Claim 7
Dependent Claim
19 words
The method in accordance with claim 1, wherein said plastically deforming step includes shrinking the tubular element with heat.
Claim 8
Dependent Claim
32 words
The method according to claim 6, wherein the method further comprises the step of covering a tubular end of the container in a tight manner with a metal disc fitted by beading.
Claim 9
Dependent Claim
44 words
The method according to claim 7, wherein the method further comprises the steps of forming an inwardly turned flange at another tubular end of the container and bonding to said flange a disc of the same material as the container with heat and pressure.
Claim 10
Dependent Claim
36 words
The method in accordance with claim 1, wherein said laminated web also has a second surface layer of glycol-modified polyester, said layer of metal foil being intermediate of said base layer and said second surface layer.
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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) | 1988-12-09 | 1989-06-10 | 1989-12-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-12-09 | 1993-06-10 | 1993-12-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-12-09 | 1997-06-10 | 1997-12-10 | $7700.00 | Window Closed / Lapsed |