US5261545A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyester container
Assignee: Yoshino Kogyosho Co Ltd
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Filing: 1992-11-17
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Granted: 1993-11-16
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Expires: 2012-11-17
Abstract
Abstract Spherulites grow in such sections as neck, neck end, bottom center or bottom periphery of a hollow bottle-shaped container of biaxially oriented blow-molded polyethylene terephthalate where the resin is not substantially subjected to orientation, thereby to improve the thermal resistance, stiffness and content resistance of such sections to almost the same extent as the biaxially oriented sections of the container such as shoulder and cylindrical sections thereof. The aforesaid sections of the preformed piece before being blow-molded or of the blow-molded container where the resin is not substantially subjected to orientation are first heated at 120 DEG -180 DEG C. for 3-8 minutes and, then, annealed at room temperatures, with a result that such sections have a spherulite texture of an increased density and are opacified in white or milky white.
Inventors
- 👤 Akiho Ota
- 👤 Fumio Negishi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 16:10
CPC Classifications
B; B29; B29C; B29C71/00; B29C71/02; B29C49/00; B29C49/42; B29C49/64; B29C49/6409; B29C35/00; B29C35/02; B29C35/08; B29C35/0805; B29C2035/0811; B29C49/48; B29C49/4823; B29C2049/4838; B29C49/6436; B29C49/6445; B29C49/6452; B29C49/6604; B29C49/6605; B29C71/0063; B29K; B29K2067/00; B29K2995/00; B29K2995/0037; B29K2995/004; B29K2995/0041; B29K2995/0043; Y; Y10; Y10S; Y10S264/00; Y10S264/907; Y10S428/00; Y10S428/91; Y10T; Y10T428/00; Y10T428/13; Y10T428/1352; Y10T428/1386; Y10T428/1397
Claims Analysis
Total Claims: 26
Claim 1
Independent Claim
145 words
A one piece bottle-shaped container made substantially of biaxially oriented polyethylene terephthalate, having a neck section, a bottom section, and a body section extending between said neck section and said bottom section, wherein said neck section of said container is substantially non-biaxially oriented and includes a first portion which is evenly milky colored, having an increases spherulite texture provided completely through a cross-sectional thickness of said neck section formed by a heating and annealing process selectively applied to only said first portion, and said container includes a second portion which is transparent and of both biaxially oriented polyethylene terephthalate and substantially non-biaxially oriented polyethylene terephthalate, said first portion being directly adjacent to said transparent, substantially non-biaxially oriented second portion, and said container having a non-graded pattern of contrast between said evenly milky colored first portion and said directly adjacent, transparent, substantially non-biaxially oriented second pattern.
Claim 2
Dependent Claim
145 words
A one piece bottle-shaped container made substantially of biaxially oriented polyethylene terephthalate, having a neck section, a bottom section, and a body section extending between said neck section and said bottom section, wherein said neck section of said container is substantially non-biaxially oriented and includes a first portion which is evenly milky colored, having an increases spherulite texture provided completely through a cross-sectional thickness of said neck section formed by a heating and annealing process selectively applied to only said first portion, and said container includes a second portion which is transparent and of both biaxially oriented polyethylene terephthalate and substantially non-biaxially oriented polyethylene terephthalate, said first portion being directly adjacent to said transparent, substantially non-biaxially oriented second portion, and said container having a non-graded pattern of contrast between said evenly milky colored first portion and said directly adjacent, transparent, substantially non-biaxially oriented second pattern.
Claim 3
Dependent Claim
36 words
The container of claim 1, wherein said heating and annealing process is selectively applied prior to heat setting of said container to prevent dimensional variance during subsequent heating of said first portion during said heat setting.
Claim 4
Dependent Claim
26 words
The container of claim 1, wherein said container has a third portion located in said bottom section which is milky colored and of increased spherulite texture.
Claim 5
Dependent Claim
17 words
The container of claim 1, wherein said neck section has an annular ledge in said first portion.
Claim 6
Dependent Claim
39 words
The container of claim 1, wherein said heating and annealing process includes shielding said substantially non-biaxially oriented second portion from radiant heat and thereby preventing said substantially non-biaxially oriented second portion from crystallizing and thus including milky colored areas.
Claim 7
Dependent Claim
42 words
The container of claim 1, wherein said heating and annealing process includes selectively heating only said first portion by direct and limited application of heat to thereby prevent said substantially non-biaxially oriented second portion from crystallizing and thus including milky colored areas.
Claim 8
Dependent Claim
34 words
The container of claim 1, further comprising blow molding and biaxially orienting said body section, wherein said heating and annealing process occurs prior to said blow molding and biaxial orientation of said body section.
Claim 9
Dependent Claim
24 words
The container of claim 1, wherein said heating and annealing process occurs at temperatures between 120° C. and 180° C. for about 3-8 minutes.
Claim 10
Dependent Claim
40 words
The container of claim 8, wherein said container is cooled after said heating and annealing process for at least 30 seconds and then heated to between 140° C. and 220° C. and blow molded to biaxially orient said body section.
Claim 11
Dependent Claim
24 words
The container of claim 1, wherein said heating and annealing process occurs at temperatures between 140° C. and 170° C. for about 3-5 minutes.
Claim 12
Dependent Claim
131 words
A one piece bottle-shaped container of biaxially oriented polyethylene terephthalate having a substantially cylindrical neck section which is not substantially biaxially oriented, a bottom section, and a body section extending between said neck section and said bottom section, said body section including a slope walled shoulder section adjacent and integrally sloping from said neck section, said neck section of said container having an upper portion which is crystallized, evenly milky colored and of increased spherulite texture and a directly adjacent lower portion which is transparent and adjacent said slope walled shoulder section, which slope walled shoulder section is transparent, and said container having a non-graded pattern of contrast where said crystallized, evenly milky colored, upper portion of said neck section meets said directly adjacent transparent lower portion of said neck section.
Claim 13
Dependent Claim
131 words
A one piece bottle-shaped container of biaxially oriented polyethylene terephthalate having a substantially cylindrical neck section which is not substantially biaxially oriented, a bottom section, and a body section extending between said neck section and said bottom section, said body section including a slope walled shoulder section adjacent and integrally sloping from said neck section, said neck section of said container having an upper portion which is crystallized, evenly milky colored and of increased spherulite texture and a directly adjacent lower portion which is transparent and adjacent said slope walled shoulder section, which slope walled shoulder section is transparent, and said container having a non-graded pattern of contrast where said crystallized, evenly milky colored, upper portion of said neck section meets said directly adjacent transparent lower portion of said neck section.
Claim 14
Dependent Claim
18 words
The container of claim 11, wherein said bottom section is milky colored and has an increased spherulite texture.
Claim 15
Dependent Claim
43 words
The container of claim 11, wherein said upper portion of said neck section is formed by a heating and annealing process selectively applied to only said upper portion of said neck portion, and said body section is formed by a blow molding process.
Claim 16
Dependent Claim
42 words
The container of claim 13, wherein said heating and annealing process is selectively applied prior to heat setting said container to prevent dimensional variance during subsequent heating of said upper portion of said neck section during said heat setting of said container.
Claim 17
Dependent Claim
49 words
The container of claim 13, wherein said heating and annealing process includes shielding said lower portion of said neck section and said shoulder section from radiant heat and thereby preventing said lower portion of said neck section and said shoulder section from crystallizing and thus including milky colored areas.
Claim 18
Dependent Claim
51 words
The container of claim 13, wherein said heating and annealing process includes selectively heating only said upper portion of said neck section by direct and limited application of heat to thereby prevent said lower portion of said neck section and said shoulder section from crystallizing and thus including milky colored areas.
Claim 19
Dependent Claim
24 words
The container of claim 13, wherein said heating and annealing process occurs at temperatures between 120° C. and 180° C. for about 3-8 minutes.
Claim 20
Dependent Claim
40 words
The container of claim 13, wherein said container is cooled after said heating and annealing process for at least 30 seconds and then heated to between 140° C. and 220° C. and blow molded to biaxially orient said body section.
Claim 21
Dependent Claim
24 words
The container of claim 13, wherein said heating and annealing process occurs at temperatures between 140° C. and 170° C. for about 3-5 minutes.
Claim 22
Dependent Claim
139 words
A one piece bottle-shaped container made substantially of biaxially oriented polyethylene terephthalate, having a neck section, a bottom section, and a body section extending between said neck section and said bottom section, said neck section being of substantially non-biaxially oriented polyethylene terephthalate, wherein said container includes a first portion located in said neck section which is crystallized and evenly milky colored, having an increased spherulite texture provided completely through a cross-sectional thickness of said neck section, and a distinct section portion in said neck section which is transparent and directly adjacent and integrally coupled to said first portion, said second portion further including said body section, and wherein said container has a non-graded pattern of contrast where said crystallized, evenly milky colored first portion of said neck section meets and directly adjacent transparent second portion of said neck portion.
Claim 23
Dependent Claim
139 words
A one piece bottle-shaped container made substantially of biaxially oriented polyethylene terephthalate, having a neck section, a bottom section, and a body section extending between said neck section and said bottom section, said neck section being of substantially non-biaxially oriented polyethylene terephthalate, wherein said container includes a first portion located in said neck section which is crystallized and evenly milky colored, having an increased spherulite texture provided completely through a cross-sectional thickness of said neck section, and a distinct section portion in said neck section which is transparent and directly adjacent and integrally coupled to said first portion, said second portion further including said body section, and wherein said container has a non-graded pattern of contrast where said crystallized, evenly milky colored first portion of said neck section meets and directly adjacent transparent second portion of said neck portion.
Claim 24
Dependent Claim
24 words
The container of claim 20, wherein said first portion is formed by a heating and annealing process selectively applied to only said first portion.
Claim 25
Dependent Claim
19 words
The container of claim 20, further comprising forming said container by blow molding after said first portion is crystallized.
Claim 26
Dependent Claim
21 words
The container of claim 20, wherein said container is formed by a blow molding process which biaxially orients said body section.
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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) | 1996-11-15 | 1997-05-17 | 1997-11-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-11-15 | 2001-05-17 | 2001-11-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-11-15 | 2005-05-17 | 2005-11-16 | $7700.00 | Window Closed / Lapsed |