US5037285A — Apparatus for injection molding and injection blo…

Claim 1

Independent Claim 394 words

Multi-conjection nozzle injection molding apparatus for an injection molding machine for injection molding a multi-layer, multi-material plastic article, which comprises, a plurality of injection molds which define injection cavities, a plurality of co-injection nozzles each having a central channel, and polymer flow stream passageways in communication with the central channel, said central channel having an open end, and a gate at the open end, means for mating the nozzles and injection molds, a source of polymeric material located upstream of the nozzles for each material which is to form a layer of the article, means located upstream of the nozzles for displacing each polymer material which is to form a layer of the article from its source to a co-injection nozzle passageway, flow channel means for providing a separate flow channel for each polymer material which is to form a layer of the article, each channel being in communication with one of the displacement means, said flow channel means including, flow channel splitter means in communication with each said flow channel downstream of its associated displacement means, for splitting each said flow channel into a plurality of separate branched flow channels, there being a separate branched flow channel for each material fed to each nozzle and which is to form a layer of this article, and means in communication with a branched flow channel for each material which is to form a layer of the article and in communication with a co-injection nozzle, for separately feeding each separate polymer material to its associated co-injection nozzle, a plurality of valve means cooperatively associated with the co-injection nozzles, said plurality including separate valve means for each co-injection nozzle and operative in the nozzle's central channel with respect to each polymeric material fed to the nozzle central channel and which is to form a layer of the article, drive means for driving each of said separate valve means substantially simultaneously and substantially identically within the central channel of each of said co-injection nozzles to provide in each co-injection nozzle substantially simultaneous and identical control over the initiation and termination of the flows of the polymer materials through each of the co-injection nozzles, and control means connected to the simultaneous drive means for moving the valve means in a desired mode which provides said substantially identical simultaneous movements of said separate valve means in said respective co-injection nozzles.

Claim 2

Dependent Claim 394 words

Multi-conjection nozzle injection molding apparatus for an injection molding machine for injection molding a multi-layer, multi-material plastic article, which comprises, a plurality of injection molds which define injection cavities, a plurality of co-injection nozzles each having a central channel, and polymer flow stream passageways in communication with the central channel, said central channel having an open end, and a gate at the open end, means for mating the nozzles and injection molds, a source of polymeric material located upstream of the nozzles for each material which is to form a layer of the article, means located upstream of the nozzles for displacing each polymer material which is to form a layer of the article from its source to a co-injection nozzle passageway, flow channel means for providing a separate flow channel for each polymer material which is to form a layer of the article, each channel being in communication with one of the displacement means, said flow channel means including, flow channel splitter means in communication with each said flow channel downstream of its associated displacement means, for splitting each said flow channel into a plurality of separate branched flow channels, there being a separate branched flow channel for each material fed to each nozzle and which is to form a layer of this article, and means in communication with a branched flow channel for each material which is to form a layer of the article and in communication with a co-injection nozzle, for separately feeding each separate polymer material to its associated co-injection nozzle, a plurality of valve means cooperatively associated with the co-injection nozzles, said plurality including separate valve means for each co-injection nozzle and operative in the nozzle's central channel with respect to each polymeric material fed to the nozzle central channel and which is to form a layer of the article, drive means for driving each of said separate valve means substantially simultaneously and substantially identically within the central channel of each of said co-injection nozzles to provide in each co-injection nozzle substantially simultaneous and identical control over the initiation and termination of the flows of the polymer materials through each of the co-injection nozzles, and control means connected to the simultaneous drive means for moving the valve means in a desired mode which provides said substantially identical simultaneous movements of said separate valve means in said respective co-injection nozzles.

Claim 3

Dependent Claim 347 words

Multi-coinjection nozzle injection molding apparatus for an injection molding machine for injection molding a multi-layer, multi-material plastic article, which comprises, a plurality of injection molds which define injection cavities, a plurality of co-injection nozzles each having a central channel, and polymer flow stream passageways in communication with the central channel, said central channel having an open end, and a gate at the open end, means for mating the nozzles and injection molds, a source of polymeric material located upstream of the nozzles for each material which is to form a layer of the article, means located upstream of the nozzles for displacing each polymer material which is to form a layer of the article to a co-injection nozzle passageway, flow channel means for providing a separate flow channel for each polymer material which is to form a layer of the article, each channel being in communication with a source and with one of the displacement means, said flow channel means including flow channel splitter means in communication with each flow channel for splitting each flow channel into a plurality of separate branched flow channels, there being a separate branched flow channel for each material fed to each nozzle and which is to form a layer of this article, a plurality of valve means cooperatively associated with the co-injection nozzles, said plurality including separate valve means for each co-injection nozzle and operative in the nozzle's central channel with respect to each polymeric material fed to the nozzle central channel and which is to form a layer of the article, drive means for driving each of said separate valve means substantially simultaneously and substantially identically within the central channel of each of said co-injection nozzles to provide in each co-injection nozzle substantially simultaneous and identical control over the initiation and termination of the flows of the polymer materials through each of the co-injection nozzles, and control means connected to the simultaneous drive means for moving the valve means in a desired mode which provides said substantially identical simultaneous movements of said separate valve means in said respective co-injection nozzles.

Claim 4

Dependent Claim 347 words

Multi-coinjection nozzle injection molding apparatus for an injection molding machine for injection molding a multi-layer, multi-material plastic article, which comprises, a plurality of injection molds which define injection cavities, a plurality of co-injection nozzles each having a central channel, and polymer flow stream passageways in communication with the central channel, said central channel having an open end, and a gate at the open end, means for mating the nozzles and injection molds, a source of polymeric material located upstream of the nozzles for each material which is to form a layer of the article, means located upstream of the nozzles for displacing each polymer material which is to form a layer of the article to a co-injection nozzle passageway, flow channel means for providing a separate flow channel for each polymer material which is to form a layer of the article, each channel being in communication with a source and with one of the displacement means, said flow channel means including flow channel splitter means in communication with each flow channel for splitting each flow channel into a plurality of separate branched flow channels, there being a separate branched flow channel for each material fed to each nozzle and which is to form a layer of this article, a plurality of valve means cooperatively associated with the co-injection nozzles, said plurality including separate valve means for each co-injection nozzle and operative in the nozzle's central channel with respect to each polymeric material fed to the nozzle central channel and which is to form a layer of the article, drive means for driving each of said separate valve means substantially simultaneously and substantially identically within the central channel of each of said co-injection nozzles to provide in each co-injection nozzle substantially simultaneous and identical control over the initiation and termination of the flows of the polymer materials through each of the co-injection nozzles, and control means connected to the simultaneous drive means for moving the valve means in a desired mode which provides said substantially identical simultaneous movements of said separate valve means in said respective co-injection nozzles.

Claim 5

Dependent Claim 62 words

The apparatus of claim 2 wherein the simultaneous drive means is adapted to permit the separate valve means to sequentially and simultaneously allow the flow of the plurality of materials into the co-injection nozzle central channel, said valve means and simultaneous drive means being adapted to effect said allowance of flow of layers substantially simultaneously in a plurality of the co-injection nozzles.

Claim 6

Dependent Claim 46 words

The apparatus of claim 2 wherein the passageways have orifices which communicate with the central channel close to its gate, the central channel has an axial length of from about 100 mils to about 900 mils, and the valve means is operative within said axial length.

Claim 7

Dependent Claim 30 words

The apparatus of claim 2 wherein there is included means for providing substantially the same polymer flow for each corresponding material for forming a corresponding layer of each multi-layer article.

Claim 8

Dependent Claim 19 words

The apparatus of claim 5 wherein the means for providing substantially the same polymer flow include flow channel means.

Claim 9

Dependent Claim 40 words

The apparatus of claim 6 wherein the flow channel means include means for providing substantially the same polymer flow for each corresponding material entering each of the plurality of co-injection nozzles for forming a corresponding layer of each multi-layer article.

Claim 10

Dependent Claim 45 words

The apparatus of claim 7 wherein the flow channel means include branched flow channels which include means for providing substantially the same polymer flow for each corresponding material entering each of the plurality of co-injection nozzles for forming a corresponding layer of each multi-layer article.

Claim 11

Dependent Claim 43 words

The apparatus of claim 2 wherein the branched flow channels and co-injection nozzles include means for providing substantially the same polymer flow for each corresponding material in each of the plurality of co-injection nozzles for forming a corresponding layer of each multi-layer article.

Claim 12

Dependent Claim 62 words

The apparatus of claim 2 wherein the flow channel means minimize the differences in flow history of each polymer stream of the same material which is channeled to each of more than one co-injection nozzle and which is to form a corresponding layer of each of the plurality of articles, and wherein the article is a parison for forming a blow-molded container.

Claim 13

Dependent Claim 65 words

The apparatus of claim 2 wherein the flow channel means include means for minimizing the differences in flow history of each polymer stream of the same material which is channeled to each of more than one co-injection nozzle and which is to form a corresponding layer of each of the plurality of articles, and wherein the article is a parison for forming a blow-molded container.

Claim 14

Dependent Claim 21 words

The apparatus of claim 2 wherein the injection mold is shaped to form a parison for forming a blow molded container.

Claim 15

Dependent Claim 15 words

The apparatus of claim 2 wherein the injection mold is shaped to from a container.

Claim 16

Dependent Claim 394 words

Multi-conjection nozzle injection molding apparatus for an injection molding and blow-molding machine for injection molding a multi-layer, multi-material plastic parison and for blow-molding a multi-layer multi-material plastic container therefrom, which comprises, a plurality of injection molds which define injection cavities, a plurality of co-injection nozzles each having a central channel, and polymer flow stream passageways in communication with the central channel, said central channel having an open end, and a gate at the open end, means for mating the nozzles and injection molds, a source of polymeric material located upstream of the nozzles for each material which is to form a layer of the article, means located upstream of the nozzles for displacing each polymer material which is to form a layer of the parison to a co-injection nozzle passageway, flow channel means for providing a separate flow channel for each polymer material which is to form a layer of the parison, each channel being in communication a source and with one of the displacement means, said flow channel means including flow channel splitter means in communication with each flow channel, for splitting each said flow channel into a plurality of separate branched flow channels, there being a separate branched flow channel for each material fed to each nozzle and which is to form a layer of the parison, a plurality of valve means cooperatively associated with the co-injection nozzles, said plurality including separate valve means for each co-injection nozzle and operative in the nozzle's central channel with respect to each polymeric material fed to the nozzle central channel and which is to form a layer of the parison, drive means for driving each of said separate valve means substantially simultaneously and substantially identically within the central channel of each of said co-injection nozzles to provide in each co-injection nozzle substantially simultaneous and identical control over the initiation and termination of the flows of the polymer materials through each of the co-injection nozzles, control means connected to the simultaneous drive means for moving the valve means in a desired mode which provides said substantially identical simultaneous movements of said separate valve means in said respective co-injection nozzles, a plurality of blow molds which define blow-mold cavities for blow-molding the container from the parison, means for providing said parison in a plurality of said blow-mold cavities, and means for blow-molding said container from said parison.

Claim 17

Dependent Claim 394 words

Multi-conjection nozzle injection molding apparatus for an injection molding and blow-molding machine for injection molding a multi-layer, multi-material plastic parison and for blow-molding a multi-layer multi-material plastic container therefrom, which comprises, a plurality of injection molds which define injection cavities, a plurality of co-injection nozzles each having a central channel, and polymer flow stream passageways in communication with the central channel, said central channel having an open end, and a gate at the open end, means for mating the nozzles and injection molds, a source of polymeric material located upstream of the nozzles for each material which is to form a layer of the article, means located upstream of the nozzles for displacing each polymer material which is to form a layer of the parison to a co-injection nozzle passageway, flow channel means for providing a separate flow channel for each polymer material which is to form a layer of the parison, each channel being in communication a source and with one of the displacement means, said flow channel means including flow channel splitter means in communication with each flow channel, for splitting each said flow channel into a plurality of separate branched flow channels, there being a separate branched flow channel for each material fed to each nozzle and which is to form a layer of the parison, a plurality of valve means cooperatively associated with the co-injection nozzles, said plurality including separate valve means for each co-injection nozzle and operative in the nozzle's central channel with respect to each polymeric material fed to the nozzle central channel and which is to form a layer of the parison, drive means for driving each of said separate valve means substantially simultaneously and substantially identically within the central channel of each of said co-injection nozzles to provide in each co-injection nozzle substantially simultaneous and identical control over the initiation and termination of the flows of the polymer materials through each of the co-injection nozzles, control means connected to the simultaneous drive means for moving the valve means in a desired mode which provides said substantially identical simultaneous movements of said separate valve means in said respective co-injection nozzles, a plurality of blow molds which define blow-mold cavities for blow-molding the container from the parison, means for providing said parison in a plurality of said blow-mold cavities, and means for blow-molding said container from said parison.

Claim 18

Dependent Claim 48 words

The apparatus of claim 14 wherein there is included means in communication with a branched flow channel for each material which is to form a layer of the parison and in communication with a co-injection nozzle, for separately feeding each separate polymer material to is associated co-injection nozzle.

Claim 19

Dependent Claim 35 words

The apparatus of claim 15 wherein the apparatus is adapted to provide the multi-layer containers with an internal layer which is an oxygen barrier material whose thickness is from about 0.0004 to about 0.008 inch.

Claim 20

Dependent Claim 31 words

The apparatus of claim 2 wherein a passageway of each co-injection nozzle for the oxygen barrier material has an orifice, and wherein said passageway is tapered to converge toward its orifice.

Claim 21

Dependent Claim 41 words

The apparatus of claim 17 wherein the flow channel means include means for providing substantially the same polymer flow for the oxygen barrier material entering each of the plurality of co-injection nozzles for forming a corresponding layer of each multi-layer article.

Claim 22

Dependent Claim 189 words

Apparatus for injection molding a plurality of multi-layer, multi-material plastic parisons, which comprises, a plurality of rejection molds which define injection cavities, a plurality of co-injection nozzles, means for mating the co-injection nozzles with the cavities of the injection molds, a source of polymeric material located upstream of the nozzles, for each material which is to form a layer of a plurality of multi-layer parisons, means for moving to each nozzle each polymer stream of material which is to form a layer of the plurality of parisons, flow channel means for providing a flow channel for each stream of polymer material which is to form a layer of the plurality of parisons, each flow channel for each stream of material communicating with a source, moving means and each of more than one co-injection nozzle, each of said flow channels being separate and said flow channel means includes means for providing substantially the same flow path for each polymer stream of the same material which is channeled to each of more than one co-injection nozzle and which is to form a corresponding layer of each of the plurality of parisons.

Claim 23

Dependent Claim 189 words

Apparatus for injection molding a plurality of multi-layer, multi-material plastic parisons, which comprises, a plurality of rejection molds which define injection cavities, a plurality of co-injection nozzles, means for mating the co-injection nozzles with the cavities of the injection molds, a source of polymeric material located upstream of the nozzles, for each material which is to form a layer of a plurality of multi-layer parisons, means for moving to each nozzle each polymer stream of material which is to form a layer of the plurality of parisons, flow channel means for providing a flow channel for each stream of polymer material which is to form a layer of the plurality of parisons, each flow channel for each stream of material communicating with a source, moving means and each of more than one co-injection nozzle, each of said flow channels being separate and said flow channel means includes means for providing substantially the same flow path for each polymer stream of the same material which is channeled to each of more than one co-injection nozzle and which is to form a corresponding layer of each of the plurality of parisons.

Claim 24

Dependent Claim 175 words

Apparatus for injection molding a plurality of multi-layer, multi-material plastic parisons, which comprises, a plurality of injection molds which define injection cavities, a plurality of co-injection nozzles, means for mating the co-injection nozzles with the cavities of the injection molds, a source of polymeric material located upstream of the nozzles, for each material which is to form a layer of a plurality of multi-layer parisons, means for moving to each nozzle each polymer stream of material which is to form a layer of the plurality of parisons, flow channel means for providing a flow channel for each stream of polymer material which is to form a layer of the plurality of parisons, each flow channel for each stream of material communicating with a source, moving means and each of more than one co-injection nozzle, each of said flow channels being separate for each polymer stream of the same material which is channeled to each of more than one co-injection nozzle and which is to form a corresponding layer of each of the plurality of parisons.

Claim 25

Dependent Claim 175 words

Apparatus for injection molding a plurality of multi-layer, multi-material plastic parisons, which comprises, a plurality of injection molds which define injection cavities, a plurality of co-injection nozzles, means for mating the co-injection nozzles with the cavities of the injection molds, a source of polymeric material located upstream of the nozzles, for each material which is to form a layer of a plurality of multi-layer parisons, means for moving to each nozzle each polymer stream of material which is to form a layer of the plurality of parisons, flow channel means for providing a flow channel for each stream of polymer material which is to form a layer of the plurality of parisons, each flow channel for each stream of material communicating with a source, moving means and each of more than one co-injection nozzle, each of said flow channels being separate for each polymer stream of the same material which is channeled to each of more than one co-injection nozzle and which is to form a corresponding layer of each of the plurality of parisons.

Claim 26

Dependent Claim 40 words

The apparatus of claim 20 wherein the flow channel means includes means for providing substantially the same flow of each polymer stream of the same material which is to form a corresponding layer of each of the plurality of parisons.

Claim 27

Dependent Claim 49 words

The apparatus of claim 20 wherein the flow channel means includes means for providing substantially the same flow for each polymer stream of the same material entering each of more than one co-injection nozzle and which is to form a corresponding layer of each of the plurality of parisons.

Claim 28

Dependent Claim 54 words

The apparatus of claim 20 wherein the flow channel means includes means for minimizing the differences in the flow history of each polymer stream of the same material which is channeled to each of more than one co-injection nozzle and which is to form a corresponding layer of each of the plurality of parisons.

Claim 29

Independent Claim 40 words

The apparatus of any of claims 19 through 23 wherein parisons have a side wall with a marginal end portion and whose side wall total thickness below the marginal end portion is from about 0.0810 inch to about 0.0990 inch.

Claim 30

Independent Claim 71 words

The apparatus of any of claims 19 through 23 wherein the apparatus is also for injection blow-molding a plurality of multi-layer, multi-material plastic containers from the parisons, and the apparatus includes, a plurality of blow molds which define blow-mold cavities for blow-molding said containers from the parisons, means for providing a plurality of said parisons in a plurality of said blow-mold cavities, and means for blow-molding said containers from said parisons.

Claim 31

Dependent Claim 37 words

The apparatus of claim 25 wherein the containers have a side wall with a marginal end portion and whose side wall total thickness below the marginal end portion is from about 0.021 inch to about 0.041 inch.

Claim 32

Dependent Claim 222 words

A multi-co-injection nozzle injection molding apparatus for an injection molding machine, for injection molding a plurality of multi-layer, multi-material plastic articles, which comprises, a source of polymer material for each material which is to form a layer of a plurality of articles, runner means in communication with and located downstream of the sources of polymer materials, a plurality of co-injection nozzles each having an axial central channel and a plurality of polymer flow stream passageways in communication with the central channel, and each mounted at a downstream end of the runner means, said runner means including flow channel means for providing a plurality of polymer flow stream channels each for separately channelling a polymer melt material which is to form one or more layers of a plurality of articles to each of more than one of the co-injection nozzles, means associated with the runner means for moving each stream of polymer material which is to form a layer through the flow stream channels and into the respective nozzles, and, valve means cooperatively associated with and operative within the nozzles for there preventing and allowing the flow of the respective polymer melt materials from said passageways into the central channel of the co-injection nozzles for the injection of said materials from each of more than one co-injection nozzle into a juxtaposed injection cavity.

Claim 33

Dependent Claim 222 words

A multi-co-injection nozzle injection molding apparatus for an injection molding machine, for injection molding a plurality of multi-layer, multi-material plastic articles, which comprises, a source of polymer material for each material which is to form a layer of a plurality of articles, runner means in communication with and located downstream of the sources of polymer materials, a plurality of co-injection nozzles each having an axial central channel and a plurality of polymer flow stream passageways in communication with the central channel, and each mounted at a downstream end of the runner means, said runner means including flow channel means for providing a plurality of polymer flow stream channels each for separately channelling a polymer melt material which is to form one or more layers of a plurality of articles to each of more than one of the co-injection nozzles, means associated with the runner means for moving each stream of polymer material which is to form a layer through the flow stream channels and into the respective nozzles, and, valve means cooperatively associated with and operative within the nozzles for there preventing and allowing the flow of the respective polymer melt materials from said passageways into the central channel of the co-injection nozzles for the injection of said materials from each of more than one co-injection nozzle into a juxtaposed injection cavity.

Claim 34

Dependent Claim 69 words

The apparatus of claim 27 wherein the articles are parisons, the apparatus is also for injection blow-molding a plurality of multi-layer, multi-material plastic containers therefrom, and the apparatus includes a plurality of blow molds which define blow-mold cavities for blow-molding said containers from the parisons, means for providing a plurality of said parisons in a plurality of said blow-mold cavities, and means for blow-molding said containers from said parisons.

Claim 35

Dependent Claim 130 words

Apparatus for forming a plurality of multi-layer plastics articles, comprising a plurality of co-injection nozzle means for injecting materials into associated injection molds which define cavities to form the plurality of articles and means for providing streams of plastics materials for injection to form corresponding layers of the articles, including means associated with the nozzle means for providing channels to channel each material stream separately to each of a plurality of nozzle means, more than one means for moving the streams of plastic materials along their respective channels to more than one of the respective nozzle means to form corresponding layers of a plurality of articles, and means for separately receiving in said nozzle means the streams moved thereto, for injection into said molds to form said plurality of articles.

Claim 36

Dependent Claim 130 words

Apparatus for forming a plurality of multi-layer plastics articles, comprising a plurality of co-injection nozzle means for injecting materials into associated injection molds which define cavities to form the plurality of articles and means for providing streams of plastics materials for injection to form corresponding layers of the articles, including means associated with the nozzle means for providing channels to channel each material stream separately to each of a plurality of nozzle means, more than one means for moving the streams of plastic materials along their respective channels to more than one of the respective nozzle means to form corresponding layers of a plurality of articles, and means for separately receiving in said nozzle means the streams moved thereto, for injection into said molds to form said plurality of articles.

Claim 37

Dependent Claim 82 words

The apparatus of claim 29 wherein the nozzle means includes co-injection nozzles, each having an exit end thereof, a central channel in communication therewith, separate passageways adjacent said exit end for the material streams in communication with the channels, at least two of said passageways being in communication with the central channel, and valve means operative in the central channel near the exit end to independently control the initiation and termination of flow of plastic materials from said at least two passageways.

Claim 38

Dependent Claim 28 words

The apparatus of claim 27 wherein the apparatus includes means for providing substantially the same polymer flow for corresponding material streams which form corresponding layers of the articles.

Claim 39

Dependent Claim 34 words

The apparatus of claim 31 wherein said substantially the same polymer flow is provided for each corresponding material stream entering each of the plurality of co-injection nozzles for forming corresponding layers of the articles.

Claim 40

Dependent Claim 19 words

The apparatus of claim 31 wherein the means for providing substantially the same polymer flow include flow channel means.

Claim 41

Dependent Claim 28 words

The apparatus of claim 33 wherein the flow channel means include means for providing that corresponding material streams entering the plural nozzle means have substantially the same flow.

Claim 42

Dependent Claim 15 words

The apparatus of claim 33 wherein the flow channel means include branched flow channel means.

Claim 43

Dependent Claim 31 words

The apparatus of claim 27 wherein the apparatus includes means for minimizing the flow history of polymer streams of the same materials channeled to each of more than one co-injection nozzle.

Claim 44

Dependent Claim 18 words

The apparatus of claim 36 wherein the flow channel means include the means for minimizing the flow history.

Claim 45

Dependent Claim 13 words

Apparatus claim 37 wherein the flow channel means include branched flow channel means.

Claim 46

Independent Claim 19 words

The apparatus of claims 35 or 38 wherein branched flow channel means include means for minimizing the flow history.

Claim 47

Dependent Claim 29 words

The apparatus of claim 29 wherein there is included means to effect substantially simultaneous control of the flow or non-flow of corresponding material streams in the plural nozzle means.

Claim 48

Dependent Claim 20 words

The apparatus of claim 40 wherein said control means include positively-acting, flow controlling means for each of the nozzle means.

Claim 49

Dependent Claim 113 words

The apparatus of claim 29 for use to produce articles having at least three layers, wherein each of the nozzle means have, associated therewith, flow controlling means to prevent flow of a corresponding one of the materials to form a corresponding layer of the articles, and means to raise the pressure of the arrested material to a level above the pressure of the materials which are to form other corresponding layers of the articles, the flow-controlling means being operable when the said material has been so pressurized to establish flow of the said material for providing the multi-layer articles with at least three layers, one of which is formed by the said material.

Claim 50

Dependent Claim 35 words

The apparatus of claim 42 wherein the flow controlling means is operative substantially simultaneously for each of the nozzle means to establish simultaneously onset of flow of the said material in the plural nozzle means.

Claim 51

Dependent Claim 31 words

The apparatus of claim 42, wherein the pressurizing means is effective to exert a common pressure on the material controlled by the flow controlling means associated with the plural nozzle means.

Claim 52

Independent Claim 67 words

The apparatus of claims 42 or 44 wherein said flow controlling means provide positive blocking of the material controlled thereby while said material is pressurized, and means is provided to operate the flow controlling means for all the plural nozzle means substantially simultaneously to effect a positive unblocking of the pressurized material, thereby to establish onset of flow thereof substantially simultaneously in all of the nozzle means.

Claim 53

Dependent Claim 25 words

The apparatus of claim 42 wherein plural nozzle means have flow control means operative to control flow and/or non-flow of at least two material streams.

Claim 54

Dependent Claim 20 words

The apparatus of claim 42 wherein each flow control means is or are substantially identical in the plural nozzle means.

Claim 55

Independent Claim 66 words

The apparatus of claims 19 through 23 wherein said means for moving include a plurality of common moving means each for moving a separate stream of material to a nozzle to form more than one layer of the parisons formed therefrom, and each flow channel for each stream of material having a portion and/or branched portion thereof extending to each of a plurality of co-injection nozzles.

Claim 56

Dependent Claim 99 words

The apparatus of claim 48 wherein each nozzle has an axial central channel and a plurality of flow stream passageways in communication with the central channel, each passageway being in communication with a polymer flow stream channel or branched portion thereof, and the apparatus includes valve means cooperatively associated with and operative within the nozzles for there preventing and allowing the flow of the respective polymer melt materials from a plurality of said passageways into the central channel of the injection nozzles for injection of said materials from each more than one co-injection nozzle into a juxtaposed injection cavity.

Claim 57

Independent Claim 18 words

The apparatus of claims 19, 20, 27 or 29 wherein the flow channels comprise a long runner system.

Claim 58

Dependent Claim 14 words

The apparatus of claim 48 wherein the flow channels comprise a long runner system.

Claim 59

Independent Claim 48 words

The apparatus of any of claims 19, 21, 22, 23, 27 or 29, wherein each flow channel is split into and includes a plurality of branched flow channels, and wherein a plurality of means for moving are located downstream of where the plurality of flow channels are split.

Claim 60

Dependent Claim 36 words

The apparatus of claim 48 wherein each flow channel for each stream of material includes means for splitting the channel into branched flow channels and wherein the splitting means are located downstream of the moving means.

Claim 61

Dependent Claim 30 words

The apparatus of claim 48 wherein the flow channel for each stream of material has branched portions thereof and each common moving means is in communication with a branched portion.

Claim 62

Independent Claim 29 words

The apparatus of claims 20, 27, or 29 wherein the flow channel means minimize the differences in the flow history of corresponding materials entering a plurality of the nozzles.

Claim 63

Independent Claim 31 words

The apparatus of claims 20, 27 or 29 wherein the flow channel means include means for minimizing differences in the flow history of corresponding materials entering a plurality of the nozzles.

Claim 64

Independent Claim 33 words

The apparatus of claims 20, 27 or 29 wherein the flow channel means provide substantially the same flow for a plurality of polymer streams of the same material entering a plurality of nozzles.

Claim 65

Independent Claim 36 words

The apparatus of claims 20, 27 or 29 wherein the flow channel means include means for providing substantially the same flow for a plurality of polymer streams of the same material entering a plurality of nozzles.

Claim 66

Independent Claim 51 words

The apparatus of claims 20-23, 27 or 29 wherein there is included separate valve means operative in each of the plurality of co-injection nozzles for independently controlling the time of initiation and termination of flow streams which are to from one or more layers of each of the plurality of parisons.

Annuity Stage	Window Opens	Payment Deadline	Surcharge Period Until	Estimated Fee	Status
3.5 Years (Year 4)	1994-08-05	1995-02-04	1995-08-06	$2000.00	Window Closed / Lapsed
7.5 Years (Year 8)	1998-08-05	1999-02-04	1999-08-06	$3760.00	Window Closed / Lapsed
11.5 Years (Year 12)	2002-08-05	2003-02-04	2003-08-06	$7700.00	Window Closed / Lapsed

Apparatus for injection molding and injection blow molding multi-layer articles

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