US4735665A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for manufacturing a can-like container
Assignee: Resonac Holdings Corp
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Filing: 1986-03-11
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Granted: 1988-04-05
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Expires: 2006-03-11
Abstract
Abstract A can-like container and a method for manufacturing such a container which provides a strong structure, tight gas barrier, and no effect upon the taste of food stored in the container. The body of the container is fabricated with a multi-layer sheet composed of a metal foil layer having a thickness of no more than 40 μm and a hot-melt resin layer formed on one or both sides of the metal foil layer. The margin portions of the multi-layer material of the container body in corners thereof are either folded into two tucks at each corner or formed into vertical wrinkles upon molding the container body. A cover is joined to the container body, which cover is also composed of a metal foil layer and at least hot-melt resin layer.
Inventors
- 👤 Otohiko Miyauchi
- 👤 Michihiro Ohkawachi
- 👤 Junji Yotsuyanagi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 11:04
CPC Classifications
B; B31; B31B; B31B50/00; B31B50/26; B31B50/44; B32; B32B; B32B15/00; B32B15/04; B32B15/08; B29; B29C; B29C45/00; B29C45/14; B29C45/14778; B29C45/14811; B29D; B29D22/00; B29D22/003; B31F; B31F1/00; B31F1/0077; B32B1/00; B32B15/085; B32B15/20; B32B27/00; B32B27/32; B32B7/00; B32B7/04; B32B7/12; B65; B65D; B65D1/00; B65D1/22; B65D1/26; B65D1/28; B65D17/00; B65D17/28; B65D17/401; B65D17/4011; B29K; B29K2705/00; B31B2100/00; B31B2100/002; B31B2100/0024; B31B2110/00; B31B2110/10; B31B2110/30; B31B2110/35; B31B2120/00; B31B2120/70; B32B2307/00; B32B2307/30; B32B2307/31; B32B2439/00; B32B2439/40; B65D2517/00; B65D2517/0001; B65D2517/001; B65D2517/0016; B65D2517/0058; B65D2517/0059; B65D2517/0061; B65D2517/008; B65D2517/0085; B65D2517/0088; B65D2577/00; B65D2577/10; B65D2577/20; B65D2577/2025
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
168 words
A method for forming a can-like container comprising the steps of: providing a blank sheet, said blank sheet comprising a metal foil layer having a thickness of no more than 40 μm, and a hot-melt resin layer formed on at least one side of said metal foil layer; cutting said sheet to provide a blank having dimensions established in accordance with desired dimensions of said container; placing said blank over one side of a female mold, said female mold having a hollow central portion having dimensions established in accordance with said desired dimensions of said container, said female mold having grooves in its side wall portions; pressing a male mold against said blank and into said hollow portion of said female mold to thereby provide a container having wrinkles in side wall portions corresponding to side wall portions of said female mold; and attaching a cover to said container body, said cover comprising a metal foil layer having a hot-melt resin layer on at least one side thereof.
Claim 2
Independent Claim
168 words
A method for forming a can-like container comprising the steps of: providing a blank sheet, said blank sheet comprising a metal foil layer having a thickness of no more than 40 μm, and a hot-melt resin layer formed on at least one side of said metal foil layer; cutting said sheet to provide a blank having dimensions established in accordance with desired dimensions of said container; placing said blank over one side of a female mold, said female mold having a hollow central portion having dimensions established in accordance with said desired dimensions of said container, said female mold having grooves in its side wall portions; pressing a male mold against said blank and into said hollow portion of said female mold to thereby provide a container having wrinkles in side wall portions corresponding to side wall portions of said female mold; and attaching a cover to said container body, said cover comprising a metal foil layer having a hot-melt resin layer on at least one side thereof.
Claim 3
Dependent Claim
27 words
The method of claim 1, wherein said female mold has four substantially straight sides and four corner portions for gathering said wrinkles at said four corner portions.
Claim 4
Dependent Claim
27 words
The method of claim 1, wherein said female mold has a substantially cylindrical hollow space for providing said side wall portions of said container with vertical wrinkles.
Claim 5
Dependent Claim
29 words
The method of claim 2, wherein said corner portions of said container body each contain two tucks folded inwardly towards one another on an outside of said container body.
Claim 6
Dependent Claim
18 words
The method of claim 2, wherein said corner portions of said container body are formed with vertical wrinkles.
Claim 7
Dependent Claim
39 words
The method of claim 2, wherein gaps between corner portions of said male mold and said corner portions of said female molds are wider than gaps between adjacent straight edge portions of said male mold and said female mold.
Claim 8
Dependent Claim
30 words
The process of claim 2 or 3, wherein said step of attaching said cover comprises hot-melting said resin layer of said cover with said resin layer of said container body.
Claim 9
Dependent Claim
19 words
The method of claim 2 or 3, further comprising the steps of providing a tray around said container body.
Claim 10
Dependent Claim
28 words
The process of claim 8, wherein said step of providing said tray comprises injection molding a resin material around a portion of said container body opposite said cover.
Claim 11
Dependent Claim
40 words
The method of claim 9, wherein said providing said tray further comprises: injection molding a resin material directly to an outer surface of said container body to contact with said tray, for smoothing the inner surface of said container body.
Claim 12
Independent Claim
223 words
A method for forming a can-like container comprising the steps of: providing a blank sheet, said blank sheet comprising a metal foil layer having a thickness of no more than 40 μm, and a hot-melt resin layer formed on at least one side of said metal foil layer; cutting said sheet to provide a blank having dimensions established in accordance with desired dimensions of said containers; placing said blank over one side of a female mold, said female mold having a hollow central portion having dimensions established in accordance with said desired dimensions of said container, said female mold having grooves in its side wall portions; pressing a male mold against said blank and into said hollow portion of said female mold to thereby provide a container having wrinkles in side wall portions corresponding to side wall portions of said female mold, said female mold having four substantially straight sides and four corner portions for gathering said wrinkles at said four corner portions; providing a tray around said container body, said step of providing said tray comprising injection molding a resin material around a portion of said container body; and attaching a cover to said container body opposite the portion thereof surrounded by said tray, said cover comprising a metal foil layer having a hot-melt resin layer on at least one side thereof.
Claim 13
Independent Claim
223 words
A method for forming a can-like container comprising the steps of: providing a blank sheet, said blank sheet comprising a metal foil layer having a thickness of no more than 40 μm, and a hot-melt resin layer formed on at least one side of said metal foil layer; cutting said sheet to provide a blank having dimensions established in accordance with desired dimensions of said containers; placing said blank over one side of a female mold, said female mold having a hollow central portion having dimensions established in accordance with said desired dimensions of said container, said female mold having grooves in its side wall portions; pressing a male mold against said blank and into said hollow portion of said female mold to thereby provide a container having wrinkles in side wall portions corresponding to side wall portions of said female mold, said female mold having four substantially straight sides and four corner portions for gathering said wrinkles at said four corner portions; providing a tray around said container body, said step of providing said tray comprising injection molding a resin material around a portion of said container body; and attaching a cover to said container body opposite the portion thereof surrounded by said tray, said cover comprising a metal foil layer having a hot-melt resin layer on at least one side thereof.
Claim 14
Dependent Claim
40 words
The method of claim 11, wherein said providing said tray further comprises: injection molding a resin material directly to an outer surface of said container body to contact with said tray, for smoothing the inner surface of said container body.
Claim 15
Independent Claim
223 words
A method for forming a can-like container comprising the steps of: providing a blank sheet, said blank sheet comprising a metal foil layer having a thickness of no more than 40 μm, and a hot-melt resin layer formed on at least one side of said metal foil layer; cutting said sheet to provide a blank having dimensions established in accordance with desired dimensions of said container; placing said blank over one side of a female mold, said female mold having a hollow central portion having dimensions established in accordance with said desired dimensions of said container, said female mold having grooves in its side wall portions; pressing a male mold against said blank and into said hollow portion of said female mold to thereby provide a container having wrinkles in side wall portions corresponding to side wall portions of said female mold, said female mold having a substantially cylindrical hollow space for providing said side wall portions of said container with vertical wrinkles; providing a tray around said container body; said step of providing said tray comprising injection molding a resin material around a portion of said container body; and attaching a cover to said container body opposite the portion thereof surrounded by said tray, said cover comprising a metal foil layer having a hot-melt resin layer on at least one side thereof.
Claim 16
Independent Claim
223 words
A method for forming a can-like container comprising the steps of: providing a blank sheet, said blank sheet comprising a metal foil layer having a thickness of no more than 40 μm, and a hot-melt resin layer formed on at least one side of said metal foil layer; cutting said sheet to provide a blank having dimensions established in accordance with desired dimensions of said container; placing said blank over one side of a female mold, said female mold having a hollow central portion having dimensions established in accordance with said desired dimensions of said container, said female mold having grooves in its side wall portions; pressing a male mold against said blank and into said hollow portion of said female mold to thereby provide a container having wrinkles in side wall portions corresponding to side wall portions of said female mold, said female mold having a substantially cylindrical hollow space for providing said side wall portions of said container with vertical wrinkles; providing a tray around said container body; said step of providing said tray comprising injection molding a resin material around a portion of said container body; and attaching a cover to said container body opposite the portion thereof surrounded by said tray, said cover comprising a metal foil layer having a hot-melt resin layer on at least one side thereof.
Claim 17
Dependent Claim
40 words
The method of claim 13, wherein said providing said tray further comprises: injection molding a resin material directly to an outer surface of said container body to contact with said tray, for smoothing the inner surface of said container body.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-04-05 | 1991-10-05 | 1992-04-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-04-05 | 1995-10-05 | 1996-04-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-04-05 | 1999-10-05 | 2000-04-05 | $7700.00 | Window Closed / Lapsed |