Patent US3740181A successfully refreshed from Google Patents.
US3740181A
Expired / Lapsed
US
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Apparatus for blow molding plastic articles
Assignee: OI Glass Inc
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Filing: 1971-05-17
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Granted: 1973-06-19
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Expires: 1991-05-17
Abstract
Abstract This invention relates to a method and apparatus for blow molding articles, such as handled containers, having injection molded portions integrally formed with blow molded portions. The method includes forming a tubular blowable parison, blowing this parison in a pre-form mold, and then blowing the pre-form to its final shape in a final blow mold. The utilization of the pre-form mold as an intermediate step makes possible the formation of containers of enhanced physical characteristics, the elimination of external flash or waste portions, and the formation of a final article having an injection molded portion integrated with a biaxially oriented blown portion. The apparatus of the invention includes the means for forming the parison, the pre-form mold, the final blow mold and the means for correlating the operation of these portions of the apparatus to attain the operation of the overall method.
Inventors
- 👤 A Uhlig
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 18:24
CPC Classifications
B; B29; B29C; B29C49/00; B29C49/28; B29C49/30; B29C49/32; B29C49/02; B29C49/04; B29C49/0411; B29C49/04114; B29C49/08; B29C49/16; B29C49/42; B29C49/48; B29C2049/4856; B29C2049/4858; B29C2049/4861; B29C2049/4879; B29C2049/4882; B29C2049/48825; B29C2949/00; B29C2949/20; B29C2949/22; B29C2949/24; B29C2949/26; B29C2949/28; B29C2949/30; B29C2949/3024; B29C2949/3032; B29C2949/3041; B29C49/18; B29L; B29L2031/00; B29L2031/46; B29L2031/463; B29L2031/712; B29L2031/7158
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
228 words
In an apparatus for making simultaneously a plurality of blow molded containers having injection molded necks and blown bodies, a plurality of linearly aligned extrusion orifices, a corresponding number of neck molds each of which is vertically aligned with one of said orifices, means for moving said neck molds simultaneously vertically toward and away from said orifices, and means for extruding tubes from said orifices during movement of said neck molds from said orifices, the improvements of a pair of mold side plates on opposite sides, respectively, of the aligned orifices, a set of pre-form blow mold halves carried by each of said side plates, respectively, closeable onto said tubes, means for actuating said side plates toward one another to close said mold halves and away from one another to open said mold halves, means for injecting air under pressure into said tubes when enclosed by said pre-blow mold halves to form said tubes into blown pre-forms, a set of final blow mold halves also carried by said side plates and closeable, respectively, onto said blown pre-forms, means for injecting air into said pre-forms to blow said pre-forms into containers, and means for moving said side plates linearly along the direction of alignment of said orifices to align first the pre-form mold halves and then the final mold halves with the orifices and with the tubes and preforms.
Claim 2
Dependent Claim
228 words
In an apparatus for making simultaneously a plurality of blow molded containers having injection molded necks and blown bodies, a plurality of linearly aligned extrusion orifices, a corresponding number of neck molds each of which is vertically aligned with one of said orifices, means for moving said neck molds simultaneously vertically toward and away from said orifices, and means for extruding tubes from said orifices during movement of said neck molds from said orifices, the improvements of a pair of mold side plates on opposite sides, respectively, of the aligned orifices, a set of pre-form blow mold halves carried by each of said side plates, respectively, closeable onto said tubes, means for actuating said side plates toward one another to close said mold halves and away from one another to open said mold halves, means for injecting air under pressure into said tubes when enclosed by said pre-blow mold halves to form said tubes into blown pre-forms, a set of final blow mold halves also carried by said side plates and closeable, respectively, onto said blown pre-forms, means for injecting air into said pre-forms to blow said pre-forms into containers, and means for moving said side plates linearly along the direction of alignment of said orifices to align first the pre-form mold halves and then the final mold halves with the orifices and with the tubes and preforms.
Claim 3
Dependent Claim
182 words
In an apparatus for making a thermoplastic container having an injection molded neck and a blown body, and including a neck injection mold movable vertically relative to an extrusion orifice from a first position at which the injection mold is filled to form the neck to a second position at which the material filling the neck is integral with an extruded tube issued from and still joined to the orifice, the improvements of a pre-form blow mold and a final blow mold, successively closeable at the location of the tube, said pre-form mold having a cavity of a shape intermediate that of the tube and that of said container body, said final mold cavity having the shape of said body, means for shifting said molds horizontally to successively align the cavities thereof with the location of said tube, means for closing said pre-form mold and said final mold at the location of said tube, both said molds engaging said tube adjacent said orifice and at substantially the same location, and means for introducing blow air into said tube and said pre-form, respectively.
Claim 4
Dependent Claim
182 words
In an apparatus for making a thermoplastic container having an injection molded neck and a blown body, and including a neck injection mold movable vertically relative to an extrusion orifice from a first position at which the injection mold is filled to form the neck to a second position at which the material filling the neck is integral with an extruded tube issued from and still joined to the orifice, the improvements of a pre-form blow mold and a final blow mold, successively closeable at the location of the tube, said pre-form mold having a cavity of a shape intermediate that of the tube and that of said container body, said final mold cavity having the shape of said body, means for shifting said molds horizontally to successively align the cavities thereof with the location of said tube, means for closing said pre-form mold and said final mold at the location of said tube, both said molds engaging said tube adjacent said orifice and at substantially the same location, and means for introducing blow air into said tube and said pre-form, respectively.
Claim 5
Dependent Claim
26 words
The apparatus of claim 2 wherein said introducing means is disposed at said tube location for introducing blow air into both said tube and said pre-form.
Claim 6
Dependent Claim
21 words
The apparatus of claim 3 wherein said shifting means concurrently opens and closes both said pre-form mold and said final mold.
Claim 7
Dependent Claim
23 words
The apparatus of claim 4 wherein said shifting means further includes means for concurrent reciprocation of said pre-form mold and said final mold.
Claim 8
Dependent Claim
144 words
In an apparatus for making a container having an injection molded neck and a blown body, said apparatus including a neck injection mold, means for moving said neck mold relative to an orifice, means for extruding a tube from said orifice during movement of said neck mold, the improvements of: a pre-form mold having a cavity of a shape intermediate that of the tube and the container body, means for closing said pre-form mold on said tube to pinch off said tube and thereby create a tail portion of said tube, means for introducing blow air through said neck injection mold into said tube to form said tube into a pre-form and into said pre-form to form said container, a final mold having a cavity the shape of said body, and means on said final mold to eNgage said pre-form only at said tail.
Claim 9
Dependent Claim
144 words
In an apparatus for making a container having an injection molded neck and a blown body, said apparatus including a neck injection mold, means for moving said neck mold relative to an orifice, means for extruding a tube from said orifice during movement of said neck mold, the improvements of: a pre-form mold having a cavity of a shape intermediate that of the tube and the container body, means for closing said pre-form mold on said tube to pinch off said tube and thereby create a tail portion of said tube, means for introducing blow air through said neck injection mold into said tube to form said tube into a pre-form and into said pre-form to form said container, a final mold having a cavity the shape of said body, and means on said final mold to eNgage said pre-form only at said tail.
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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) | 1976-06-18 | 1976-12-18 | 1977-06-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-06-18 | 1980-12-18 | 1981-06-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-06-18 | 1984-12-18 | 1985-06-19 | $7700.00 | Window Closed / Lapsed |