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US4256231A Expired / Lapsed US ⏱️ 0.0 years remaining

Container with a synthetic lining impermeable to liquids and method of making

Assignee: Henkel AG and Co KGaA
•
Filing: 1978-12-28
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Granted: 1981-03-17
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Expires: 1998-12-28
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Abstract

Abstract A container comprising a non-deformable shell under ordinary stresses made from at least two cooperating parts which together constitute said shell, said shell being lined internally with and thermoplastically fused with a lining made of a liquid-impermeable thermoplastic material and a method of making said container, comprising (a) introducing at least two cooperating parts which together constitute a non-deformable shell under ordinary stresses into molding tool members which each have a contour corresponding to at least a portion of the outer surface of each part of the shell, (b) bringing the parts together, (c) applying a substantially even film of thermoplastic material at an elevated temperature and in an at least plastic state to the inner surface of the parts to produce on the internal surface of the wall of the shell a lining, which is liquid-impermeable and thermoplastically fused to the shell when the container is at ambient temperature, and (d) removing the container from the molding tool members.

Inventors

  • 👤 Alexander Cioc
  • 👤 Werner Kunzel
  • 👤 Klaus Meyer

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-31 19:08
CPC Classifications
B; B29; B29C; B29C49/00; B29C49/22; B29C49/02; B29C49/04; B29C49/0411; B29C49/24; B65; B65D; B65D23/00; B65D23/02; B29C2049/2404

Claims Analysis

Total Claims: 12
Claim 1
Independent Claim 80 words
A necked container comprising an outer shell and a one-piece inner liner, said outer shell consisting of two mated parts formed from a material selected from the group consisting of cellulose, pasteboard, cardboard and a mixture thereof, said parts being abutted together at a mating seam, said liner being a liquid-impermeable thermoplatic material and being thermoplastically bonded to said mated parts to fuse said mating parts together, said shell being that component of said container that lends structural rigidity thereto.
Claim 2
Dependent Claim 80 words
A necked container comprising an outer shell and a one-piece inner liner, said outer shell consisting of two mated parts formed from a material selected from the group consisting of cellulose, pasteboard, cardboard and a mixture thereof, said parts being abutted together at a mating seam, said liner being a liquid-impermeable thermoplatic material and being thermoplastically bonded to said mated parts to fuse said mating parts together, said shell being that component of said container that lends structural rigidity thereto.
Claim 3
Dependent Claim 11 words
The container of claim 1, wherein the thermoplastic material comprises polyethylene.
Claim 4
Dependent Claim 12 words
The container of claim 1, wherein the thermoplastic material comprises polyvinyl chloride.
Claim 5
Dependent Claim 13 words
The container of claim 1, wherein the shell is made from two halves.
Claim 6
Dependent Claim 10 words
The container of claim 1, wherein the shell comprises cellulose.
Claim 7
Dependent Claim 10 words
The container of claim 1, wherein the shell comprises cardboard.
Claim 8
Dependent Claim 13 words
The container of claim 1, wherein the shell is provided with reinforcing means.
Claim 9
Dependent Claim 32 words
The container of claim 1, wherein the shell has a wall thickness of from 0.5 to 10 mm with areas of reinforcing of greater wall thickness at the bottom of said container.
Claim 10
Dependent Claim 29 words
The container of claim 1, wherein the lining has a wall thickness of from 0.2 to 1 mm within said shell, with areas of reinforcing of greater wall thickness.
Claim 11
Dependent Claim 55 words
The container of claim 1, wherein said outer shell has an opening for a neck extension, said inner lining projects through said outer shell opening and has a non-deformable neck outside said outer shell opening, said non-deformable neck also having an opening and being cooperative with a closure member to close said non-deformable neck opening.
Claim 12
Dependent Claim 33 words
The container of claim 1, wherein said outer shell has a wall thickness of from 0.5 to 10 mm and said inner lining has a wall thickness of from 0.2 to 1 mm.

References Cited (Backward Citations)

US2393347A Cited
US2766161A Cited
US2959812A Cited
US3697369A Cited
US3527439A Cited
US3576651A Cited
US3561629A Cited
US3825141A Cited
US3898310A Cited
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US4117061A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1984-03-16 1984-09-15 1985-03-17 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1988-03-16 1988-09-15 1989-03-17 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1992-03-16 1992-09-15 1993-03-17 $7700.00 Window Closed / Lapsed

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