DE3577718D1 - Polytetrafluorethylenzusammensetzung. - Google Patents

Polytetrafluorethylenzusammensetzung.

Info

Publication number: DE3577718D1
Authority: DE; Germany
Prior art keywords: polytetrafluorethylene; composition; polytetrafluorethylene composition
Prior art date: 1984-06-21
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.): Expired - Fee Related

Application number

DE8585902732T

Other languages

English (en)

Inventor

R Doose

Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)

DirecTV Group Inc

Original Assignee

Hughes Aircraft Co

Priority date (The priority date 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 date listed.)

1984-06-21

Filing date

1985-04-22

Publication date

1990-06-21

1985-04-22 Application filed by Hughes Aircraft Co filed Critical Hughes Aircraft Co

1990-06-21 Application granted granted Critical

1990-06-21 Publication of DE3577718D1 publication Critical patent/DE3577718D1/de

2005-04-23 Anticipated expiration legal-status Critical

Status Expired - Fee Related legal-status Critical Current

Links

Classifications

- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K3/00—Materials not provided for elsewhere
- C09K3/10—Materials in mouldable or extrudable form for sealing or packing joints or covers
- C09K3/1006—Materials in mouldable or extrudable form for sealing or packing joints or covers characterised by the chemical nature of one of its constituents
- C09K3/1009—Fluorinated polymers, e.g. PTFE
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/01—Use of inorganic substances as compounding ingredients characterized by their specific function
- C08K3/013—Fillers, pigments or reinforcing additives
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/40—Glass
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K2200/00—Chemical nature of materials in mouldable or extrudable form for sealing or packing joints or covers
- C09K2200/02—Inorganic compounds
- C09K2200/0243—Silica-rich compounds, e.g. silicates, cement, glass
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K2200/00—Chemical nature of materials in mouldable or extrudable form for sealing or packing joints or covers
- C09K2200/02—Inorganic compounds
- C09K2200/0243—Silica-rich compounds, e.g. silicates, cement, glass
- C09K2200/0252—Clays
- 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
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S277/00—Seal for a joint or juncture
- Y10S277/935—Seal made of a particular material
- Y10S277/936—Composite
- Y10S277/937—Glass particles or filament
- 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
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S277/00—Seal for a joint or juncture
- Y10S277/935—Seal made of a particular material
- Y10S277/944—Elastomer or plastic
- Y10S277/945—Containing fluorine
- Y10S277/946—PTFE

DE8585902732T 1984-06-21 1985-04-22 Polytetrafluorethylenzusammensetzung. Expired - Fee Related DE3577718D1 (de)

Applications Claiming Priority (2)

Application Number	Priority Date	Filing Date	Title
US06/622,895 US4580790A (en)	1984-06-21	1984-06-21	Sintered polytetrafluoroethylene composite material and seal assembly
PCT/US1985/000727 WO1986000326A1 (en)	1984-06-21	1985-04-22	Polytetrafluoroethylene composite material

Publications (1)

Publication Number	Publication Date
DE3577718D1 true DE3577718D1 (de)	1990-06-21

Family

ID=24495939

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
DE8585902732T Expired - Fee Related DE3577718D1 (de)	1984-06-21	1985-04-22	Polytetrafluorethylenzusammensetzung.

Country Status (7)

Country	Link
US (1)	US4580790A (de)
EP (1)	EP0185044B1 (de)
JP (1)	JPS61502469A (de)
DE (1)	DE3577718D1 (de)
IL (1)	IL75168A (de)
NO (1)	NO860183L (de)
WO (1)	WO1986000326A1 (de)

Families Citing this family (80)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
US4782477A (en) *	1985-09-30	1988-11-01	Kabushiki Kaisha Toshiba	Optical recording medium with fluorine resin adhesive
IT1215202B (it) *	1986-12-03	1990-01-31	G E V I P I A G	Organo di tenuta in materiale duro sinterizzato da un semilavorato formato con un legante organico
US4878766A (en) *	1988-08-25	1989-11-07	Quadion Corporation	High speed self-lubricating bearing-seal assembly
US5040905A (en) *	1987-10-09	1991-08-20	Quadion Corporation	Elastomeric combined seal and spring
US4925710A (en) *	1988-03-31	1990-05-15	Buck Thomas F	Ultrathin-wall fluoropolymer tube with removable fluoropolymer core
US5300366A (en) *	1990-05-09	1994-04-05	Oiles Corporation	Fluororesin composition for a sliding member and a sliding member
JP2901322B2 (ja) *	1990-08-10	1999-06-07	株式会社リケン	スターリングエンジン用シール装置
EP0505546A4 (en) *	1990-10-11	1993-04-07	Rotoflex, Inc.	Rotary shaft sealing device
US5356158A (en) *	1990-10-11	1994-10-18	Rotoflex, Inc.	Resilient rotary seal with projecting edge
US5174583A (en) *	1991-08-08	1992-12-29	Orlowski David C	Unitary bearing seal
US5171027A (en) *	1992-01-31	1992-12-15	Parker-Hannifin Corporation	High temperature and pressure fluid seal
JP3129365B2 (ja) *	1993-08-30	2001-01-29	三菱重工業株式会社	スクロ−ル型流体機械
JP3170109B2 (ja) *	1993-09-03	2001-05-28	三菱重工業株式会社	スクロ−ル型圧縮機
GB9400187D0 (en) *	1994-01-07	1994-03-02	Smith Tech Dev H R	Sealing, method, means and apparatus
JP2835575B2 (ja) *	1994-10-25	1998-12-14	大同メタル工業株式会社	スクロール型コンプレッサー用シール材
US5702111A (en) *	1995-01-05	1997-12-30	Smith; Henry Roy	Sealing apparatus
US5772641A (en) *	1995-12-12	1998-06-30	Medi-Dyne Inc.	Overlapping welds for catheter constructions
US6103037A (en) *	1995-12-12	2000-08-15	Medi-Dyne Inc.	Method for making a catheter having overlapping welds
US5951929A (en) *	1995-12-12	1999-09-14	Medi-Dyne Inc.	Method for forming a catheter having overlapping welds
US5655780A (en) *	1996-01-18	1997-08-12	General Signal Corp.	Mixer seal assembly with fast connect coupling
US6186510B1 (en)	1996-01-30	2001-02-13	Power Packing Company, Inc.	Mechanical contact bearing seal
US5964465A (en) *	1996-03-13	1999-10-12	W. L. Gore & Associates, Inc.	Low creep polytetrafluoroethylene form-in-place gasketing elements
US6884481B1 (en) *	1998-04-24	2005-04-26	Kim A. Reynolds	Motion transmitting cable assemblies having abrasion resistant multi-wall liner
US6578850B1 (en) *	2000-11-14	2003-06-17	General Electric Company	Dynamic seal for a drive shaft
US7923137B2 (en) *	2003-10-09	2011-04-12	Eveready Battery Company, Inc.	Nonaqueous cell with improved thermoplastic sealing member
US8252458B2 (en) *	2003-10-09	2012-08-28	Eveready Battery Company, Inc.	Electrolyte-absoring, non-permeable sealing materials
US8165355B2 (en) *	2006-09-11	2012-04-24	Validity Sensors, Inc.	Method and apparatus for fingerprint motion tracking using an in-line array for use in navigation applications
US8131026B2 (en)	2004-04-16	2012-03-06	Validity Sensors, Inc.	Method and apparatus for fingerprint image reconstruction
US8175345B2 (en)	2004-04-16	2012-05-08	Validity Sensors, Inc.	Unitized ergonomic two-dimensional fingerprint motion tracking device and method
US8229184B2 (en) *	2004-04-16	2012-07-24	Validity Sensors, Inc.	Method and algorithm for accurate finger motion tracking
US8447077B2 (en)	2006-09-11	2013-05-21	Validity Sensors, Inc.	Method and apparatus for fingerprint motion tracking using an in-line array
US8358815B2 (en) *	2004-04-16	2013-01-22	Validity Sensors, Inc.	Method and apparatus for two-dimensional finger motion tracking and control
WO2005106774A2 (en)	2004-04-23	2005-11-10	Validity Sensors, Inc.	Methods and apparatus for acquiring a swiped fingerprint image
US7302961B2 (en) *	2004-09-01	2007-12-04	Flow-Safe, Inc.	Surge relief valve
DE602005022900D1 (de)	2004-10-04	2010-09-23	Validity Sensors Inc	Fingerabdruckerfassende konstruktionen mit einem substrat
US7314898B2 (en) *	2004-12-29	2008-01-01	3M Innovative Properties Company	Microsphere-filled polytetrafluoroethylene compositions
US8492046B2 (en) *	2006-12-18	2013-07-23	GM Global Technology Operations LLC	Method of mitigating fuel cell degradation due to startup and shutdown via hydrogen/nitrogen storage
US8107212B2 (en) *	2007-04-30	2012-01-31	Validity Sensors, Inc.	Apparatus and method for protecting fingerprint sensing circuitry from electrostatic discharge
US8290150B2 (en) *	2007-05-11	2012-10-16	Validity Sensors, Inc.	Method and system for electronically securing an electronic device using physically unclonable functions
US20110002461A1 (en) *	2007-05-11	2011-01-06	Validity Sensors, Inc.	Method and System for Electronically Securing an Electronic Biometric Device Using Physically Unclonable Functions
US20090155456A1 (en) *	2007-12-14	2009-06-18	Validity Sensors, Inc.	System and Method for Fingerprint-Resistant Surfaces for Devices Using Fingerprint Sensors
US8204281B2 (en) *	2007-12-14	2012-06-19	Validity Sensors, Inc.	System and method to remove artifacts from fingerprint sensor scans
US8276816B2 (en) *	2007-12-14	2012-10-02	Validity Sensors, Inc.	Smart card system with ergonomic fingerprint sensor and method of using
US8116540B2 (en)	2008-04-04	2012-02-14	Validity Sensors, Inc.	Apparatus and method for reducing noise in fingerprint sensing circuits
EP2321764A4 (de) *	2008-07-22	2012-10-10	Validity Sensors Inc	System, vorrichtung und verfahren zur sicherung einer gerätekomponente
US8391568B2 (en) *	2008-11-10	2013-03-05	Validity Sensors, Inc.	System and method for improved scanning of fingerprint edges
US20100176892A1 (en) *	2009-01-15	2010-07-15	Validity Sensors, Inc.	Ultra Low Power Oscillator
US8600122B2 (en) *	2009-01-15	2013-12-03	Validity Sensors, Inc.	Apparatus and method for culling substantially redundant data in fingerprint sensing circuits
US20100180136A1 (en) *	2009-01-15	2010-07-15	Validity Sensors, Inc.	Ultra Low Power Wake-On-Event Mode For Biometric Systems
US8278946B2 (en) *	2009-01-15	2012-10-02	Validity Sensors, Inc.	Apparatus and method for detecting finger activity on a fingerprint sensor
US8374407B2 (en)	2009-01-28	2013-02-12	Validity Sensors, Inc.	Live finger detection
US20100208953A1 (en) *	2009-02-17	2010-08-19	Validity Sensors, Inc.	Illuminated Fingerprint Sensor and Method
US9400911B2 (en)	2009-10-30	2016-07-26	Synaptics Incorporated	Fingerprint sensor and integratable electronic display
US9274553B2 (en)	2009-10-30	2016-03-01	Synaptics Incorporated	Fingerprint sensor and integratable electronic display
US9336428B2 (en)	2009-10-30	2016-05-10	Synaptics Incorporated	Integrated fingerprint sensor and display
US8866347B2 (en)	2010-01-15	2014-10-21	Idex Asa	Biometric image sensing
US8421890B2 (en)	2010-01-15	2013-04-16	Picofield Technologies, Inc.	Electronic imager using an impedance sensor grid array and method of making
US8791792B2 (en) *	2010-01-15	2014-07-29	Idex Asa	Electronic imager using an impedance sensor grid array mounted on or about a switch and method of making
US9666635B2 (en)	2010-02-19	2017-05-30	Synaptics Incorporated	Fingerprint sensing circuit
US8716613B2 (en) *	2010-03-02	2014-05-06	Synaptics Incoporated	Apparatus and method for electrostatic discharge protection
US9001040B2 (en)	2010-06-02	2015-04-07	Synaptics Incorporated	Integrated fingerprint sensor and navigation device
US8331096B2 (en)	2010-08-20	2012-12-11	Validity Sensors, Inc.	Fingerprint acquisition expansion card apparatus
US8594393B2 (en)	2011-01-26	2013-11-26	Validity Sensors	System for and method of image reconstruction with dual line scanner using line counts
US8538097B2 (en)	2011-01-26	2013-09-17	Validity Sensors, Inc.	User input utilizing dual line scanner apparatus and method
GB2489100A (en)	2011-03-16	2012-09-19	Validity Sensors Inc	Wafer-level packaging for a fingerprint sensor
US10043052B2 (en)	2011-10-27	2018-08-07	Synaptics Incorporated	Electronic device packages and methods
US9195877B2 (en)	2011-12-23	2015-11-24	Synaptics Incorporated	Methods and devices for capacitive image sensing
US9785299B2 (en)	2012-01-03	2017-10-10	Synaptics Incorporated	Structures and manufacturing methods for glass covered electronic devices
US9251329B2 (en)	2012-03-27	2016-02-02	Synaptics Incorporated	Button depress wakeup and wakeup strategy
US9137438B2 (en)	2012-03-27	2015-09-15	Synaptics Incorporated	Biometric object sensor and method
US9268991B2 (en)	2012-03-27	2016-02-23	Synaptics Incorporated	Method of and system for enrolling and matching biometric data
US9600709B2 (en)	2012-03-28	2017-03-21	Synaptics Incorporated	Methods and systems for enrolling biometric data
US9152838B2 (en)	2012-03-29	2015-10-06	Synaptics Incorporated	Fingerprint sensor packagings and methods
CN109407862B (zh)	2012-04-10	2022-03-11	傲迪司威生物识别公司	生物计量感测
US9665762B2 (en)	2013-01-11	2017-05-30	Synaptics Incorporated	Tiered wakeup strategy
JP6292829B2 (ja) *	2013-11-12	2018-03-14	曙ブレーキ工業株式会社	摩擦材組成物および摩擦材
CN104945794B (zh) *	2014-03-31	2018-02-06	日本华尔卡工业株式会社	一种填充改性ptfe密封板材及其制备方法
CN105236935A (zh) *	2014-07-09	2016-01-13	泰盛兴应用材料股份有限公司	瓷砖产品及其制造方法
ITUB201645515U1 (it) *	2016-02-15	2017-08-15	Ode S R L	Kit di tenute per pompe a vibrazione
CN114989547B (zh) *	2022-06-24	2024-01-02	佛山科学技术学院	一种具有磨损原位修复功能的聚合物复合材料及其制备方法和应用

Family Cites Families (19)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
GB575620A (en) *	1942-08-10	1946-02-26	Du Pont	Gaskets and apparatus containing the same
US2400099A (en) *	1943-10-25	1946-05-14	Du Pont	Process for obtaining shaped articles
US2593582A (en) *	1950-06-30	1952-04-22	Du Pont	Process for producing tetrafluoroethylene polymer compositions
GB903090A (en) *	1957-07-10	1962-08-09	Polymer Corp	Filling of polytetrafluoroethylene
US3067135A (en) *	1959-03-04	1962-12-04	Sulzer Frers S A	Bearing comprising polytetrafluoroethylene and phosphate glass
GB917223A (en) *	1959-04-30	1963-01-30	Glacier Co Ltd	Homogeneous solid materials
FR1336665A (fr) *	1961-08-11	1963-09-06	Saint Gobain	Pièces de friction
DE1745937C3 (de) *	1963-09-09	1973-12-20	E.I. Du Pont De Nemours And Co., Wilmington, Del. (V.St.A.)	Formpulver aus Polytetrafluorathylen und Verfahren zu dessen Herstellung
GB1155270A (en) *	1965-12-14	1969-06-18	Ici Ltd	Sintering Filled Granular PTFE.
US3438932A (en) *	1966-12-09	1969-04-15	Us Air Force	High strength,heat resistant fluoroelastomers
DE1694956B2 (de) *	1967-05-16	1974-03-14	Karl Schmidt Gmbh, 7107 Neckarsulm	Gleitlagerwerkstoff aus Polytetrafluoräthylen mit Füllstoff
FR2140329A1 (en) *	1971-06-10	1973-01-19	Saimap	Polytetrafluorethylene of good stability - filled with barytes or fluorite
US3759883A (en) *	1971-11-16	1973-09-18	Allied Chem	Chlorotrifluoroethylene and process for preparing them cold flow resistant homogeneous copolymers of tetrafluoroethylene and
JPS5439979B2 (de) *	1972-08-01	1979-11-30
US3898361A (en) *	1973-06-04	1975-08-05	Caterpillar Tractor Co	Fluoroelastomer-based composite material
DE2601647A1 (de) *	1975-01-20	1976-07-22	Garlock Inc	Lagermasse, gleitlager und verfahren zu deren herstellung
JPS5215303A (en) *	1975-07-26	1977-02-04	Toho Kikai Kk	Cartridge shell coupling structure of tone arm
JPS5266562A (en) *	1975-12-02	1977-06-02	Asahi Glass Co Ltd	Fluorine-containing copolymer compositions incorporated with a glassy substance
DE2949908A1 (de) *	1979-12-12	1981-06-19	Hoechst Ag, 6230 Frankfurt	Rieselfaehige sinterpulver mit verbesserten eigenschaften auf basis von tetrafluorethylen-polymeren und verfahren zu deren herstellung

1984
- 1984-06-21 US US06/622,895 patent/US4580790A/en not_active Expired - Lifetime
1985
- 1985-04-22 WO PCT/US1985/000727 patent/WO1986000326A1/en active IP Right Grant
- 1985-04-22 DE DE8585902732T patent/DE3577718D1/de not_active Expired - Fee Related
- 1985-04-22 EP EP85902732A patent/EP0185044B1/de not_active Expired - Lifetime
- 1985-04-22 JP JP60502377A patent/JPS61502469A/ja active Pending
- 1985-05-10 IL IL75168A patent/IL75168A/xx not_active IP Right Cessation
1986
- 1986-01-20 NO NO860183A patent/NO860183L/no unknown

Also Published As

Publication number	Publication date
US4580790A (en)	1986-04-08
WO1986000326A1 (en)	1986-01-16
IL75168A0 (en)	1985-09-29
EP0185044A1 (de)	1986-06-25
JPS61502469A (ja)	1986-10-30
EP0185044B1 (de)	1990-05-16
NO860183L (no)	1986-01-20
IL75168A (en)	1989-06-30

Legal Events

Date	Code	Title	Description
1991-06-06	8364	No opposition during term of opposition
2001-03-22	8327	Change in the person/name/address of the patent owner	Owner name: HUGHES ELECTRONICS CORP., EL SEGUNDO, CALIF., US
2003-02-13	8339	Ceased/non-payment of the annual fee

Publication	Publication Date	Title
DE3577718D1 (de)	1990-06-21	Polytetrafluorethylenzusammensetzung.
FI850323A0 (fi)	1985-01-25	Heterocykliska kompositioner.
DE3585704D1 (de)	1992-04-30	Thermoplastische-elastomere-zusammensetzung.
DE3280162D1 (de)	1990-06-07	Polyaethylenzusammensetzung.
DE3583583D1 (de)	1991-08-29	Aetzzusammensetzung.
DE3587390T2 (de)	1994-01-13	Harzzusammensetzung.
DE3582402D1 (de)	1991-05-08	Haertbare fluorelastomerzusammensetzung.
DE3685409D1 (de)	1992-06-25	Antitumorzusammensetzung.
FI865037A0 (fi)	1986-12-10	Mikrobicida kompositioner.
DE3485874D1 (de)	1992-09-24	Anschwellende zusammensetzung.
ES2019061B3 (es)	1991-06-01	Composicion quimiluminiscente.
DE3681140D1 (de)	1991-10-02	Polyaethylenzusammensetzung.
AR240382A1 (es)	1990-04-30	Composicion herbicida.
DE3578631D1 (de)	1990-08-16	Polyorganosiloxanzusammensetzungen.
DE3574881D1 (de)	1990-01-25	Harzzusammensetzung.
DE3684003D1 (de)	1992-04-02	Propylen-polymer-zusammensetzung.
DE3684626D1 (de)	1992-05-07	Schmerzstillende zusammensetzung.
DE3587736D1 (de)	1994-03-10	Härtbare Zusammensetzung.
DE3584578D1 (de)	1991-12-12	Polyvinylcloridharzzusammensetzung.
DE3686740D1 (de)	1992-10-22	Einkomponenthaertbare zusammensetzung.
DE3582194D1 (de)	1991-04-25	Detergens-zusammensetzungen.
DE3579967D1 (de)	1990-11-08	Fluorelastomerzusammensetzung.
DE3485582D1 (de)	1992-04-16	Antioxydierende zusammensetzung.
DE3584226D1 (de)	1991-10-31	Zusammensetzung.
FI850150A0 (fi)	1985-01-14	Form foer en likriktad seismisk spaorparameter.