JPH0377624U - - Google Patents

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Publication number
JPH0377624U
JPH0377624U JP11168890U JP11168890U JPH0377624U JP H0377624 U JPH0377624 U JP H0377624U JP 11168890 U JP11168890 U JP 11168890U JP 11168890 U JP11168890 U JP 11168890U JP H0377624 U JPH0377624 U JP H0377624U
Authority
JP
Japan
Prior art keywords
roller
strip
elastomeric material
calendering
calender roll
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP11168890U
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English (en)
Other versions
JPH0638660Y2 (ja
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Filing date
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Publication of JPH0377624U publication Critical patent/JPH0377624U/ja
Application granted granted Critical
Publication of JPH0638660Y2 publication Critical patent/JPH0638660Y2/ja
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B17/00—Recovery of plastics or other constituents of waste material containing plastics
    • B29B17/0005—Direct recuperation and re-use of scrap material during moulding operation, i.e. feed-back of used material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
    • B29C43/22—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of indefinite length
    • B29C43/24—Calendering
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
    • B29C48/06—Rod-shaped
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
    • B29C48/07—Flat, e.g. panels
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
    • B29C48/12—Articles with an irregular circumference when viewed in cross-section, e.g. window profiles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/30—Extrusion nozzles or dies
    • B29C48/35—Extrusion nozzles or dies with rollers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/92—Measuring, controlling or regulating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2948/00—Indexing scheme relating to extrusion moulding
    • B29C2948/92—Measuring, controlling or regulating
    • B29C2948/92009—Measured parameter
    • B29C2948/92019—Pressure
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2948/00—Indexing scheme relating to extrusion moulding
    • B29C2948/92—Measuring, controlling or regulating
    • B29C2948/92009—Measured parameter
    • B29C2948/92114—Dimensions
    • B29C2948/92152—Thickness
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2948/00—Indexing scheme relating to extrusion moulding
    • B29C2948/92—Measuring, controlling or regulating
    • B29C2948/92323—Location or phase of measurement
    • B29C2948/92361—Extrusion unit
    • B29C2948/92409—Die; Nozzle zone
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2948/00—Indexing scheme relating to extrusion moulding
    • B29C2948/92—Measuring, controlling or regulating
    • B29C2948/92323—Location or phase of measurement
    • B29C2948/92428—Calibration, after-treatment, or cooling zone
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2948/00—Indexing scheme relating to extrusion moulding
    • B29C2948/92—Measuring, controlling or regulating
    • B29C2948/92323—Location or phase of measurement
    • B29C2948/92447—Moulded article
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2948/00—Indexing scheme relating to extrusion moulding
    • B29C2948/92—Measuring, controlling or regulating
    • B29C2948/92504—Controlled parameter
    • B29C2948/9258—Velocity
    • B29C2948/9259—Angular velocity
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2948/00—Indexing scheme relating to extrusion moulding
    • B29C2948/92—Measuring, controlling or regulating
    • B29C2948/92504—Controlled parameter
    • B29C2948/9258—Velocity
    • B29C2948/926—Flow or feed rate
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2948/00—Indexing scheme relating to extrusion moulding
    • B29C2948/92—Measuring, controlling or regulating
    • B29C2948/92504—Controlled parameter
    • B29C2948/92609—Dimensions
    • B29C2948/92647—Thickness
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2948/00—Indexing scheme relating to extrusion moulding
    • B29C2948/92—Measuring, controlling or regulating
    • B29C2948/92504—Controlled parameter
    • B29C2948/92685—Density, e.g. per unit length or area
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2948/00—Indexing scheme relating to extrusion moulding
    • B29C2948/92—Measuring, controlling or regulating
    • B29C2948/92819—Location or phase of control
    • B29C2948/92857—Extrusion unit
    • B29C2948/92876—Feeding, melting, plasticising or pumping zones, e.g. the melt itself
    • B29C2948/92885—Screw or gear
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2948/00—Indexing scheme relating to extrusion moulding
    • B29C2948/92—Measuring, controlling or regulating
    • B29C2948/92819—Location or phase of control
    • B29C2948/92923—Calibration, after-treatment or cooling zone
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2948/00—Indexing scheme relating to extrusion moulding
    • B29C2948/92—Measuring, controlling or regulating
    • B29C2948/92819—Location or phase of control
    • B29C2948/92942—Moulded article
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00—Technologies for solid waste management
    • Y02W30/50—Reuse, recycling or recovery technologies
    • Y02W30/62—Plastics recycling; Rubber recycling

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Environmental & Geological Engineering (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)
  • Casting Or Compression Moulding Of Plastics Or The Like (AREA)

Description

【図面の簡単な説明】
第１図は部分断面・切取略立面図であつてロー
ラダイ押出し装置によつて初期成形されそしてロ
ーラを挟んで押出し機の反対側に位置するカレン
ダロールとの間で最終成形されたストリツプ状部
品を含む本発明の一実施例を示す。第２図は第１
図の線２−２から見た部分断面・切取側面図であ
つて押出し機のノズル部およびダイプレートを通
りローラ上でストリツプに初期成形されそしてカ
レンダロールとローラとの間の仕上用間隙で最終
成形されるエラストマ材の流れを示す。第３図は
第２の実施例の部分断面略側面図であつてローラ
とカレンダロール間のエラストマ材の流れを示す
。第２のカレンダロールの位置が点線で示されて
おり、また完成したストリツプを運び出すコンベ
ア、およびトリミングくずを押出し機に運び戻す
コンベーヤも示されている。第４図は第３図の線
４−４から見た略図であつてカツタおよびカツタ
用横軸を示す。第５図は本発明の第３の実施例の
切取略平面図であつてその内部でスクリユーが材
料をローラとダイプレート間の通路に直接送り込
む押出し機およびダイプレートを示す。第６図は
第５図の線６−６についての略断面図である。第
７図は第６図の線７−７についての断面図である
。第８図は第６図の線８−８についての断面図で
ある。第９図は第６図の線９−９についての断面
図である。第１０図は第６図の線１０−１０につ
いての断面図である。

Claims (1)

  1. 【実用新案登録請求の範囲】 １ エラストマ材２８のストリツプ状部材を成形
    するためのローラダイ押出しとカレンダ加工を兼
    ねた装置であつて、 軸３４の周りをローラ表面に取巻くローラ、お
    よび軸３４と、 前記軸３４のまわりに前記ローラ３２を回転さ
    せる手段と、 前記エラストマ材２８を圧力下で混合し流動状
    態にする押出し機２２と、 前記押出し機２２の出口端において圧力下の前
    記エラストマ材２８を前記ローラ表面３０上に押
    し出すノズル部２６と、 前記ノズル部２６において前記押出し機２２に
    接続され、そして前記エラストマ材のストリツプ
    ５０を初期成形するため、前記ローラ表面３０に
    沿つて前記ノズル部２６の下流側に延びているダ
    イプレート５２と、 前記ダイプレート５２の下流側に位置するカレ
    ンダロール３６を備え、該カレンダロール３６は
    、カレンダ表面３８を前記ローラ表面３０のすぐ
    近くに有し、かつ、前記エラストマ材２８のスト
    リツプ状部材を最終的に形成する仕上用間隙が設
    けられている、ローラダイ押し出しとカレンダ加
    工を兼ねた装置。 ２ 前記カレンダロール３６が、前記ノズル部２
    ６において前記ローラ表面３０に向けて押し出さ
    れるエラストマ材２８の圧力に対抗するように前
    記押出し機２２から見て前記ローラ３２の反対側
    に位置する、特許請求の範囲第１項記載のローラ
    ダイ押し出しとカレンダ加工を兼ねた装置。 ３ 前記カレンダ表面３８が前記ストリツプ状部
    品の最終的成形のための円周状に延びているくぼ
    み４８を有する、特許請求の範囲第１項記載のロ
    ーラダイ押し出しとカレンダ加工を兼ねた装置。 ４ 前記カレンダロール３６が、該カレンダロー
    ルに装着され前記ストリツプ状部品の最終的成形
    のため前記カレンダ表面３８を備えたスリーブ４
    ６を有する、特許請求の範囲第１項記載のローラ
    ダイ押し出しとカレンダ加工を兼ねた装置。 ５ 前記カレンダロール３６が前記ローラ３２の
    直径よりも大きい直径を有し、前記ノズル部２６
    において前記ローラ表面３０にかかる前記エラス
    トマ材２８の圧力に対抗する前記カレンダロール
    ３６の堅さを有する、特許請求の範囲第２項記載
    のローラダイ押し出しとカレンダ加工を兼ねた装
    置。 ６ 前記仕上用間隙において、該仕上用間隙にお
    けるエラストマ材２８の盛り上り５６のサイズを
    測る測定手段と、該測定手段に反応して前記エラ
    ストマ材２８のローラ表面３０上への押し出し量
    を増加または減少するための押出し機制御手段６
    ３を有する、特許請求の範囲第１項記載のローラ
    ダイ押し出しとカレンダ加工を兼ねた装置。 ７ 前記カレンダロール３６の下流側に位置し前
    記ストリツプの縁からトリミングくずを分離する
    縁トリミング手段および前記トリミングくずを前
    記押出し機２２に運ぶコンベーヤ手段を有する、
    特許請求の範囲第１項記載のローラダイ押し出し
    とカレンダ加工を兼ねた装置。 ８ 前記最初に述べたカレンダロール３６，６６
    の下流側に第２のカレンダロール９４が置かれ、
    前記エラストマ材のストリツプ状部材の最終形状
    を変更するため前記第１のカレンダロール６６お
    よび第２のカレンダロール９４を前記ローラとの
    協働状態に入れ、およびはづす手段を有する、特
    許請求の範囲第１項記載のローラダイ押し出しと
    カレンダ加工を兼ねた装置。 ９ 前記スリーブ４６を前記エラストマ材のスト
    リツプに異なれ仕上げ形状を与えるために取りは
    づし、異なるカレンダ表面を有する第２のスリー
    ブ４６に置き換えることができる、特許請求の範
    囲第４項記載のローラダイ押し出しとカレンダ加
    工を兼ねた装置。 １０ 前記押出し機２２がシリンダと該シリンダ
    内において前記エラストマ材を混合し流動状態化
    するために回転するスクリユー５１とを有し、該
    スクリユーがその下流側の端部を前記ノズル部を
    通り前記ローラ３２に近い位置に延びる出口部分
    に有し、前記エラストマ材を直接前記ローラ表面
    ３０上に供給しさらに前記装置の自動清掃を可能
    にする特許請求の範囲第１項記載のローラダイ押
    し出しとカレンダ加工を兼ねた装置。 １１ 前記スクリユー５１の下流側の端部１００
    が実質的に前記ローラの半径と同一の半径の円周
    の表面形状を持つたスクリユー先端を有する、特
    許請求の範囲第１０項記載のローラダイ押し出し
    とカレンダ加工を兼ねた装置。 １２ 前記ノズル部２６が前記押出し機２２のシ
    リンダと実質的に同一の直径を有する、特許請求
    の範囲第１１項記載のローラダイ押し出しとカレ
    ンダ加工を兼ねた装置。 １３ 前記ダイプレート５２が、前記ローラ表面
    ３０の間で通路を区画する溝のついた表面を有し
    、前記スクリユー５１により前記エラストマ材を
    直接に該通路を通して前記ローラ上に供給する、
    特許請求の範囲第１０項記載のローラダイ押し出
    しとカレンダ加工を兼ねた装置。 １４ エラストマ材のストリツプ状部材を成形す
    る方法であつて、 (イ) エラストマ材のストリツプ状部材を押出
    し機から回転するローラ表面上に押し出し、 (ロ) 前記ストリツプ状部材を前記ローラ表面
    から間隔を置いて設けられているダイプレートを
    通過させて導きつつ初期成形を行ない、そして (ハ) 前記ダイプレートから下流側のローラ上
    の位置において、仕上用間隙が設けられている前
    記カレンダロールとローラとの間で、前記ストリ
    ツプ状部材を最終的に成形する、エラストマ材の
    ストリツプ成形方法。 １５ ストリツプの縁が前記仕上用間隙および前
    記カレンダロールの下流側においてトリミングさ
    れる、特許請求の範囲第１４項記載のエラストマ
    材のストリツプ成形方法。 １６ 前記縁のトリミングによるくずが前記押出
    し機に運び戻される、特許請求の範囲第１５項記
    載のエラストマ材のストリツプ成形方法。 １７ 実質的にここに記載されまたは添付の図面
    に示されるローラダイ押出しとカレンダ加工を兼
    ねた装置およびエラストマ材のストリツプ成形方
    法。
JP11168890U 1989-10-27 1990-10-26 ローラダイ押し出しとカレンダ加工を兼ねた装置並びにエラストマ材のストリップ成形方法 Expired - Fee Related JPH0638660Y2 (ja)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US427,814 1989-10-27
US07/427,814 US5030079A (en) 1989-10-27 1989-10-27 Roller die extrusion and calendering apparatus

Publications (2)

Publication Number Publication Date
JPH0377624U true JPH0377624U (ja) 1991-08-05
JPH0638660Y2 JPH0638660Y2 (ja) 1994-10-12

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Country Link
US (1) US5030079A (ja)
JP (1) JPH0638660Y2 (ja)
DE (1) DE4034144C2 (ja)

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DE4034144A1 (de) 1991-05-02
DE4034144C2 (de) 2000-01-05
US5030079A (en) 1991-07-09
JPH0638660Y2 (ja) 1994-10-12

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