US4745013A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multi-layer molded articles
Assignee: Pechiney Plastic Packaging Inc
•
Filing: 1986-09-19
•
Granted: 1988-05-17
•
Expires: 2006-09-19
Abstract
Abstract Injection molded and injection blow molded multi-layer substantially rigid plastic articles are provided, which, in preferred embodiments, include: at least five layer plastic articles having side and bottom walls comprised of an outside surface layer, an inside surface layer, an internal layer, and first and second intermediate layers, one on either side of the internal layer, and having the terminal end of the internal layer encapsulated by intermediate layer material, whether it be solely or primarily by first or by both first and second intermediate layer material. At least three-layer injection molded plastic containers are provided; multi-layer injection molded plastic containers each of whose side wall is comprised of at least three layers, wherein-- the ratio of the internal layer thickness in the bottom wall relative to the total bottom wall thickness is on the average greater than the ratio of the internal layer thickness in the side wall relative to the total side wall thickness,-- the bottom wall total thickness is less than the side wall total thickness and a portion of the thickness of the internal layer in the bottom wall is at least equal to the average thickness of the internal layer in the side wall,-- the bottom wall total thickness is less than the total thickness of the side wall, and, in a central portion of the bottom wall, the internal layer thickness is greater than the average thickness of the internal layer in the side wall, or-- the average bottom wall total thickness is less than the average side wall total thickness, and at least a portion of the internal layer is thicker in the bottom wall than the average thickness of the internal layer in the side wall.
Inventors
- 👤 Frederick G. Kudert
- 👤 Maurice G. Latreille
- 👤 Robert J. McHenry
- 👤 George F. Nahill
- 👤 Henry Pfutzenreuter, III
- 👤 William A. Tennant
- 👤 Thomas T. Tung
- 👤 John Vella, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 03:37
CPC Classifications
B; B65; B65D; B65D1/00; B65D1/22; B65D1/26; B65D1/28; B29; B29C; B29C45/00; B29C45/16; B29C45/1603; B29C45/1607; B29C45/1642; B29C45/1643; B29C45/17; B29C45/20; B29C48/00; B29C48/16; B29C48/18; B29C48/185; B29C49/00; B29C49/071; B29C2045/161; B29C2045/1612; B29C2949/00; B29C2949/07; B29C2949/072; B29C2949/0724; B29C2949/073; B29C2949/0731; B29C2949/0733; B29C2949/076; B29C2949/0761; B29C2949/0762; B29C2949/0768; B29C2949/0769; B29C2949/077; B29C2949/0771; B29C2949/078; B29C2949/0781; B29C2949/081; B29C2949/0811; B29C2949/0819; B29C2949/0829; B29C2949/0861; B29C2949/0872; B29C2949/30; B29C2949/3008; B29C2949/3012; B29C2949/3016; B29C2949/302; B29C2949/3024; B29C2949/3026; B29C2949/3028; B29C2949/3032; B29C48/03; B29C49/42; B29C49/64; B29C49/6604; B29C49/6605; B29K; B29K2105/00; B29K2105/26; B29L; B29L2031/00; B29L2031/712; B29L2031/7158; B29L2031/716; Y; Y10; Y10T; Y10T428/00; Y10T428/13; Y10T428/1352; Y10T428/1379; Y10T428/1383
Claims Analysis
Total Claims: 75
Claim 1
Independent Claim
69 words
An at-least five-layer plastic injection molded or injection blow-molded article having a side and bottom walls comprised of an outside surface layer, an inside surface layer, an internal layer, a first intermediate layer between the outside surface layer and the internal layer, and a second intermediate layer between the inside surface layer and the internal layer, wherein the internal layer has a terminal end encapsulated by intermediate layer material.
Claim 2
Dependent Claim
69 words
An at-least five-layer plastic injection molded or injection blow-molded article having a side and bottom walls comprised of an outside surface layer, an inside surface layer, an internal layer, a first intermediate layer between the outside surface layer and the internal layer, and a second intermediate layer between the inside surface layer and the internal layer, wherein the internal layer has a terminal end encapsulated by intermediate layer material.
Claim 3
Dependent Claim
68 words
An at-least five-layer plastic injection molded article having a side and bottom walls comprised of an outside surface layer, an inside surface layer, an internal layer, a first intermediate layer between the outside surface layer and the internal layer, and a second intermediate layer between the inside surface layer and the internal layer, wherein the internal layer has a terminal end encapsulated primarily by first intermediate layer material.
Claim 4
Dependent Claim
68 words
An at-least five-layer plastic injection molded article having a side and bottom walls comprised of an outside surface layer, an inside surface layer, an internal layer, a first intermediate layer between the outside surface layer and the internal layer, and a second intermediate layer between the inside surface layer and the internal layer, wherein the internal layer has a terminal end encapsulated primarily by first intermediate layer material.
Claim 5
Dependent Claim
68 words
An at-least five-layer plastic injection molded article having a side and bottom walls comprised of an outside surface layer, an inside surface layer, an internal layer, a first intermediate layer intermediate between the outside surface layer and the internal layer, and a second intermediate layer intermediate the inside surface layer and the internal layer, wherein the internal layer has a terminal end encapsulated by first intermediate layer material.
Claim 6
Dependent Claim
68 words
An at-least five-layer plastic injection molded article having a side and bottom walls comprised of an outside surface layer, an inside surface layer, an internal layer, a first intermediate layer intermediate between the outside surface layer and the internal layer, and a second intermediate layer intermediate the inside surface layer and the internal layer, wherein the internal layer has a terminal end encapsulated by first intermediate layer material.
Claim 7
Dependent Claim
32 words
The injection molded plastic article of claim 1 wherein the article is a container having a marginal end portion, and the terminal end is in a portion of the marginal end portion.
Claim 8
Dependent Claim
32 words
The injection molded plastic article of claim 2 wherein the article is a container having a marginal end portion, and the terminal end is in a portion of the marginal end portion.
Claim 9
Dependent Claim
32 words
The injection molded plastic article of claim 3 wherein the article is a container having a marginal end portion, and the terminal end is in a portion of the marginal end portion.
Claim 10
Dependent Claim
25 words
The injection molded plastic article of claim 4 wherein the marginal end portion includes a flange and the encapsulated terminal end is within the flange.
Claim 11
Dependent Claim
25 words
The injection molded plastic article of claim 5 wherein the marginal end portion includes a flange and the encapsulated terminal end is within the flange.
Claim 12
Dependent Claim
36 words
The injection molded plastic article of claim 4 wherein the marginal end portion of the internal layer is folded over and the folded over portion is in the marginal end portion of the container side wall.
Claim 13
Dependent Claim
24 words
The injection molded plastic article of claim 9 wherein the folded over portion of the internal layer is toward the inside of the container.
Claim 14
Dependent Claim
26 words
The injection molded plastic article of claim 8 wherein the terminal end portion that is folded over is folded over toward the inside of the container.
Claim 15
Dependent Claim
24 words
The injection molded plastic article of claim 9 wherein the folded over portion of the internal layer is toward the outside of the container.
Claim 16
Dependent Claim
26 words
The injection molded plastic article of claim 8 wherein the terminal end portion that is folded over is folded over toward the outside of the container.
Claim 17
Dependent Claim
20 words
The injection molded plastic article of claim 7 wherein an end closure is secured to the flange of the article.
Claim 18
Dependent Claim
27 words
The injection molded plastic article of claim 14 wherein an end closure is double seamed to the article and the flange is part of the double seam.
Claim 19
Dependent Claim
20 words
The injection molded plastic article of claim 8 wherein an end closure is secured to the flange of the article.
Claim 20
Dependent Claim
27 words
The injection molded plastic article of claim 15 wherein an end closure is double seamed to the article and the flange is part of the double seam.
Claim 21
Dependent Claim
28 words
The injection molded plastic article of claim 9 wherein an end closure is double seamed to a portion of the marginal end portion of the container side wall.
Claim 22
Dependent Claim
27 words
The injection molded plastic article of claim 11 wherein an end closure is double seamed to the article and the flange is part of the double seam.
Claim 23
Dependent Claim
27 words
The injection molded plastic article of claim 13 wherein an end closure is double seamed to the article and the flange is part of the double seam.
Claim 24
Dependent Claim
20 words
The injection molded plastic article of claim 7 wherein a flexible lid is sealed onto a portion of the flange.
Claim 25
Dependent Claim
20 words
The injection molded plastic article of claim 8 wherein a flexible lid is sealed onto a portion of the flange.
Claim 26
Dependent Claim
20 words
The injection molded plastic article of claim 11 wherein a flexible lid is sealed onto a portion of the flange.
Claim 27
Dependent Claim
20 words
The injection molded plastic article of claim 13 wherein a flexible lid is sealed onto a portion of the flange.
Claim 28
Dependent Claim
47 words
The injection molded plastic article of claim 4 wherein the inside and outside surface layers are each comprised of polyolefin, the internal layer is an oxygen barrier material and the intermediate layers are comprised of adherent material suitable for adhering the surface layers to the internal layer.
Claim 29
Dependent Claim
47 words
The injection molded plastic article of claim 7 wherein the inside and outside surface layers are each comprised of polyolefin, the internal layer is an oxygen barrier material and the intermediate layers are comprised of adherent material suitable for adhering the surface layers to the internal layer.
Claim 30
Dependent Claim
47 words
The injection molded plastic article of claim 15 wherein the inside and outside surface layers are each comprised of polyolefin, the internal layer is an oxygen barrier material and the intermediate layers are comprised of adherent material suitable for adhering the surface layers to the internal layer.
Claim 31
Dependent Claim
47 words
The injection molded plastic article of claim 8 wherein the inside and outside surface layers are each comprised of polyolefin, the internal layer is an oxygen barrier material and the intermediate layers are comprised of adherent material suitable for adhering the surface layers to the internal layer.
Claim 32
Dependent Claim
47 words
The injection molded plastic article of claim 9 wherein the inside and outside surface layers are each comprised of polyolefin, the internal layer is an oxygen barrier material and the intermediate layers are comprised of adherent material suitable for adhering the surface layers to the internal layer.
Claim 33
Dependent Claim
47 words
The injection molded plastic article of claim 11 wherein the inside and outside surface layers are each comprised of polyolefin, the internal layer is an oxygen barrier material and the intermediate layers are comprised of adherent material suitable for adhering the surface layers to the internal layer.
Claim 34
Dependent Claim
47 words
The injection molded plastic article of claim 13 wherein the inside and outside surface layers are each comprised of polyolefin, the internal layer is an oxygen barrier material and the intermediate layers are comprised of adherent material suitable for adhering the surface layers to the internal layer.
Claim 35
Dependent Claim
47 words
The injection molded plastic article of claim 14 wherein the inside and outside surface layers are each comprised of polyolefin, the internal layer is an oxygen barrier material and the intermediate layers are comprised of adherent material suitable for adhering the surface layers to the internal layer.
Claim 36
Dependent Claim
47 words
The injection molded plastic article of claim 16 wherein the inside and outside surface layers are each comprised of polyolefin, the internal layer is an oxygen barrier material and the intermediate layers are comprised of adherent material suitable for adhering the surface layers to the internal layer.
Claim 37
Dependent Claim
47 words
The injection molded plastic article of claim 18 wherein the inside and outside surface layers are each comprised of polyolefin, the internal layer is an oxygen barrier material and the intermediate layers are comprised of adherent material suitable for adhering the surface layers to the internal layer.
Claim 38
Dependent Claim
47 words
The injection molded plastic article of claim 19 wherein the inside and outside surface layers are each comprised of polyolefin, the internal layer is an oxygen barrier material and the intermediate layers are comprised of adherent material suitable for adhering the surface layers to the internal layer.
Claim 39
Dependent Claim
47 words
The injection molded plastic article of claim 20 wherein the inside and outside surface layers are each comprised of polyolefin, the internal layer is an oxygen barrier material and the intermediate layers are comprised of adherent material suitable for adhering the surface layers to the internal layer.
Claim 40
Dependent Claim
47 words
The injection molded plastic article of claim 21 wherein the inside and outside surface layers are each comprised of polyolefin, the internal layer is an oxygen barrier material and the intermediate layers are comprised of adherent material suitable for adhering the surface layers to the internal layer.
Claim 41
Dependent Claim
47 words
The injection molded plastic article of claim 22 wherein the inside and outside surface layers are each comprised of polyolefin, the internal layer is an oxygen barrier material and the intermediate layers are comprised of adherent material suitable for adhering the surface layers to the internal layer.
Claim 42
Dependent Claim
47 words
The injection molded plastic article of claim 23 wherein the inside and outside surface layers are each comprised of polyolefin, the internal layer is an oxygen barrier material and the intermediate layers are comprised of adherent material suitable for adhering the surface layers to the internal layer.
Claim 43
Dependent Claim
50 words
The injection molded or injection blow-molded plastic article of claim 24 wherein the inside and outside surface layers are each comprised of polyolefin, the internal layer is an oxygen barrier material and the intermediate layers are comprised of adherent material suitable for adhering the surface layers to the internal layer.
Claim 44
Dependent Claim
75 words
A multi-layer molded plastic container whose side and bottom walls are comprised of an outside surface layer, an inside surface layer, and an internal layer between the outside and inside surface layers, wherein the ratio of the internal layer thickness in the bottom wall relative to the total bottom wall thickness is on the average greater than the ratio of the internal layer thickness in the side wall relative to the total side wall thickness.
Claim 45
Dependent Claim
75 words
A multi-layer molded plastic container whose side and bottom walls are comprised of an outside surface layer, an inside surface layer, and an internal layer between the outside and inside surface layers, wherein the ratio of the internal layer thickness in the bottom wall relative to the total bottom wall thickness is on the average greater than the ratio of the internal layer thickness in the side wall relative to the total side wall thickness.
Claim 46
Dependent Claim
14 words
The container of claim 41 wherein the internal layer includes an oxygen barrier material.
Claim 47
Dependent Claim
84 words
A multi-layer molded plastic container injected from a multi-coinjection nozzle injection molding machine whose side and bottom walls are comprised of an outside surface layer, an inside surface layer, and an internal layer between the outside and inside surface layers, wherein the bottom wall total thickness is less than the side wall total thickness and wherein a portion of the thickness of the internal layer in the bottom wall is at least equal to the average thickness of said layer in said side wall.
Claim 48
Dependent Claim
84 words
A multi-layer molded plastic container injected from a multi-coinjection nozzle injection molding machine whose side and bottom walls are comprised of an outside surface layer, an inside surface layer, and an internal layer between the outside and inside surface layers, wherein the bottom wall total thickness is less than the side wall total thickness and wherein a portion of the thickness of the internal layer in the bottom wall is at least equal to the average thickness of said layer in said side wall.
Claim 49
Dependent Claim
14 words
The container of claim 43 wherein the internal layer includes an oxygen barrier material.
Claim 50
Dependent Claim
78 words
A multi-layer molded plastic container whose side and bottom walls are comprised of an outside surface layer, an inside surface layer, and an internal layer between the outside and inside surface layers, wherein the bottom wall total thickness is less than the total thickness of the side wall and wherein in a central portion of the bottom wall the thickness of the internal layer is greater than the average thickness of the internal layer in the side wall.
Claim 51
Dependent Claim
78 words
A multi-layer molded plastic container whose side and bottom walls are comprised of an outside surface layer, an inside surface layer, and an internal layer between the outside and inside surface layers, wherein the bottom wall total thickness is less than the total thickness of the side wall and wherein in a central portion of the bottom wall the thickness of the internal layer is greater than the average thickness of the internal layer in the side wall.
Claim 52
Dependent Claim
14 words
The container of claim 45 wherein the internal layer includes an oxygen barrier material.
Claim 53
Dependent Claim
76 words
A multi-layer molded plastic container whose side and bottom walls are comprised of an outside surface layer, an inside surface layer, and an internal layer between the outside and inside surface layers, wherein the average bottom wall total thickness is less than the average side wall total thickness and wherein at least a portion of said internal layer is thicker in the bottom wall than the average thickness of said internal layer in the side wall.
Claim 54
Dependent Claim
76 words
A multi-layer molded plastic container whose side and bottom walls are comprised of an outside surface layer, an inside surface layer, and an internal layer between the outside and inside surface layers, wherein the average bottom wall total thickness is less than the average side wall total thickness and wherein at least a portion of said internal layer is thicker in the bottom wall than the average thickness of said internal layer in the side wall.
Claim 55
Dependent Claim
14 words
The container of claim 47 wherein the internal layer is an oxygen barrier material.
Claim 56
Dependent Claim
18 words
The molded container of claim 42 wherein the oxygen barrier material is a polymer of ethylene vinyl alcohol.
Claim 57
Dependent Claim
18 words
The molded container of claim 44 wherein the oxygen barrier material is a polymer of ethylene vinyl alcohol.
Claim 58
Dependent Claim
18 words
The molded container of claim 46 wherein the oxygen barrier material is a polymer of ethylene vinyl alcohol.
Claim 59
Dependent Claim
18 words
The molded container of claim 48 wherein the oxygen barrier material is a polymer of ethylene vinyl alcohol.
Claim 60
Dependent Claim
13 words
The molded container of claim 41 wherein the container is injection blow molded.
Claim 61
Dependent Claim
13 words
The molded container of claim 42 wherein the container is injection blow molded.
Claim 62
Dependent Claim
13 words
The molded container of claim 43 wherein the container is injection blow molded.
Claim 63
Dependent Claim
13 words
The molded container of claim 44 wherein the container is injection blow molded.
Claim 64
Dependent Claim
13 words
The molded container of claim 45 wherein the container is injection blow molded.
Claim 65
Dependent Claim
13 words
The molded container of claim 46 wherein the container is injection blow molded.
Claim 66
Dependent Claim
13 words
The molded container of claim 47 wherein the container is injection blow molded.
Claim 67
Dependent Claim
13 words
The molded container of claim 48 wherein the container is injection blow molded.
Claim 68
Dependent Claim
13 words
The molded container of claim 49 wherein the container is injection blow molded.
Claim 69
Dependent Claim
23 words
The molded article of claim 42 wherein the internal layer also includes an adherent layer on either side of said oxygen barrier material.
Claim 70
Dependent Claim
23 words
The molded article of claim 44 wherein the internal layer also includes an adherent layer on either side of said oxygen barrier material.
Claim 71
Dependent Claim
23 words
The molded article of claim 46 wherein the internal layer also includes an adherent layer on either side of said oxygen barrier material.
Claim 72
Dependent Claim
23 words
The molded article of claim 48 wherein the internal layer also includes an adherent layer on either side of said oxygen barrier material.
Claim 73
Dependent Claim
25 words
The molded article of claim 49 wherein the internal layer also includes an adherent layer on either side of said polymer of ethylene vinyl alcohol.
Claim 74
Dependent Claim
23 words
The molded article of claim 53 wherein the internal layer also includes an adherent layer on either side of said oxygen barrier material.
Claim 75
Dependent Claim
21 words
The multi-layer plastic container of each of claims 41-66 or claim 67 wherein the container is injection molded or injection blow-molded.
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) | 1991-05-17 | 1991-11-16 | 1992-05-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-05-17 | 1995-11-16 | 1996-05-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-05-17 | 1999-11-16 | 2000-05-17 | $7700.00 | Window Closed / Lapsed |