US3856295A - Inverter-reverser for a reproduction machine - Google Patents

Inverter-reverser for a reproduction machine Download PDF

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Publication number
US3856295A
US3856295A US00429252A US42925273A US3856295A US 3856295 A US3856295 A US 3856295A US 00429252 A US00429252 A US 00429252A US 42925273 A US42925273 A US 42925273A US 3856295 A US3856295 A US 3856295A
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US
United States
Prior art keywords
sheet
roll
path
copy
sheets
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.)
Expired - Lifetime
Application number
US00429252A
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English (en)
Inventor
J Looney
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.)
Xerox Corp
Original Assignee
Xerox Corp
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.)
Filing date
Publication date
Application filed by Xerox Corp filed Critical Xerox Corp
Priority to US00429252A priority Critical patent/US3856295A/en
Priority to DE2448854A priority patent/DE2448854C3/de
Priority to CA212,600A priority patent/CA1024925A/en
Priority to FR7436619A priority patent/FR2256038B1/fr
Priority to BR9371/74A priority patent/BR7409371A/pt
Priority to NL7414928A priority patent/NL7414928A/xx
Priority to AU75488/74A priority patent/AU7548874A/en
Priority to GB50283/74A priority patent/GB1487954A/en
Priority to JP49138282A priority patent/JPS599053B2/ja
Application granted granted Critical
Priority to IT31025/74A priority patent/IT1028054B/it
Publication of US3856295A publication Critical patent/US3856295A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G15/00—Apparatus for electrographic processes using a charge pattern
    • G03G15/65—Apparatus which relate to the handling of copy material
    • G03G15/6555—Handling of sheet copy material taking place in a specific part of the copy material feeding path
    • G03G15/6573—Feeding path after the fixing point and up to the discharge tray or the finisher, e.g. special treatment of copy material to compensate for effects from the fixing
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G2215/00—Apparatus for electrophotographic processes
    • G03G2215/00362—Apparatus for electrophotographic processes relating to the copy medium handling
    • G03G2215/00367—The feeding path segment where particular handling of the copy medium occurs, segments being adjacent and non-overlapping. Each segment is identified by the most downstream point in the segment, so that for instance the segment labelled "Fixing device" is referring to the path between the "Transfer device" and the "Fixing device"
    • G03G2215/00417—Post-fixing device
    • G03G2215/00421—Discharging tray, e.g. devices stabilising the quality of the copy medium, postfixing-treatment, inverting, sorting
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G2215/00—Apparatus for electrophotographic processes
    • G03G2215/00362—Apparatus for electrophotographic processes relating to the copy medium handling
    • G03G2215/00367—The feeding path segment where particular handling of the copy medium occurs, segments being adjacent and non-overlapping. Each segment is identified by the most downstream point in the segment, so that for instance the segment labelled "Fixing device" is referring to the path between the "Transfer device" and the "Fixing device"
    • G03G2215/00417—Post-fixing device
    • G03G2215/0043—Refeeding path
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G2215/00—Apparatus for electrophotographic processes
    • G03G2215/00362—Apparatus for electrophotographic processes relating to the copy medium handling
    • G03G2215/00367—The feeding path segment where particular handling of the copy medium occurs, segments being adjacent and non-overlapping. Each segment is identified by the most downstream point in the segment, so that for instance the segment labelled "Fixing device" is referring to the path between the "Transfer device" and the "Fixing device"
    • G03G2215/00417—Post-fixing device
    • G03G2215/0043—Refeeding path
    • G03G2215/00438—Inverter of refeeding path
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G2215/00—Apparatus for electrophotographic processes
    • G03G2215/00362—Apparatus for electrophotographic processes relating to the copy medium handling
    • G03G2215/00535—Stable handling of copy medium
    • G03G2215/00556—Control of copy medium feeding
    • G03G2215/00586—Control of copy medium feeding duplex mode
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G2215/00—Apparatus for electrophotographic processes
    • G03G2215/00362—Apparatus for electrophotographic processes relating to the copy medium handling
    • G03G2215/00535—Stable handling of copy medium
    • G03G2215/00687—Handling details
    • G03G2215/007—Inverter not for refeeding purposes
    • 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
    • Y10S271/00—Sheet feeding or delivering
    • Y10S271/902—Reverse direction of sheet movement

Definitions

  • an inverter-reverser must be provided that will positively handle light weight paper without damaging the leading or trailing edges of the paper.
  • the device For heavy weight paper, the device must be capable of coping with the high inertial forces necessary for inverting the sheets at high speed. Further, since a wide variety of paper stock may be encountered, the device must be capable of handling sheets having fairly large size tolerances.
  • This invention relates to a reproduction system including a copy reproduction machine and a collator, transport means being provided to direct single sided copy through a first path to the collator deflector, means being provided tozintercept single sided copies prior to passage to the collator to deflect the copies through a second path to a location wherefrom the to feed the paper in the reverse direction to the collator for collation therein.
  • FIG. 1 is a schematic representation of an electrostatic reproduction system including an electrostatic reproduction machine and a collator;
  • FIG. 2 is a schematic view of the inverterreverser mechanism employed with the reproduction system of FIG. 1 illustrating a first position of the various components thereof to allow single sided copies produced by the reproduction machine to pass directly to the collator for collation therein;
  • FIG. 3 is a schematic illustration of the inverterreverser mechanism illustrating a second position of the various components thereof to intercept a single sided copy from the reproduction machine for returning the copy to a duplex copy tray in the reproduction machine for subsequent processing to produce double sided or duplex copy;
  • FIG. 4. is a schematic illustration of the inverterreverser apparatus employed in the reproduction system with the elements thereof in a position to intercept the completed duplex copy for inverting the copy sheet for subsequent passage to the collator for collation therein in the proper paged order.
  • FIG. 1 For a general understanding of an electrostatic processing system in which the invention may be incorporated, reference is had to FIG. 1.
  • an original D to be copied is placed upon a transparent support platen P fixedly arranged in an illumination assembly generally indicated by the reference numeral 10. While upon the platen, an illumination system flashes light rays upon the original thereby producing image rays corresponding to the information areas on the original.
  • the image rays are projected by means of an optical system 11 to an exposure station A for exposing the photosensitive surface of a moving xerographic plate in the form of a flexible photoconductive belt 12.
  • the exposure of the belt surface to the light image discharges the photoconductive layer in the areas struck by light, whereby there remains on the belt a latent electrostatic image in image configuration corresponding to the light image projected from the original on the supporting platen.
  • the electrostatic image passes around the roller 15 and through a developing stationB located at a third run of the belt wherein there is provided a developing apparatus generally indicated by the reference numeral 17.
  • the developing apparatus 17 oping material to the adjacent surface of the upwardly moving inclined photoconductive belt 12 in order to provide development of the electrostatic image.
  • the developed electrostatic image is transported by v the belt 12 to a transfer station C located at a point of tangency on the belt as it moves around the roller 16 whereat a sheet of copy paper is moved at 'a' speed in synchronism with the moving belt in order toaccomplish transfer of the developed image.
  • a transfer roller 18 which is arranged on the frame of the machine for contacting the non-transfer side of each sheet of copy paper as the same is brought into transfer engagement with the belt 12.
  • the roller 18 is electrically biased with sufficient voltage so that a developed image on the belt 12 may be electrostatically transferred to the adjacent side of a sheet of paper as the same is brought into contact therewith.
  • a programming device operatively connected to the mechanisms 20, 21 and the illumination device for producing an electrostatic latent image on the belt 12, is effective to present a developed image at the transfer station C in time sequence with the arrival of a sheet of paper.
  • the sheet is stripped from the belt 12 after transfer of the image thereto by a stripper transport 23 and thereafter conveyed by the stripper transport into a fuser assembly generally indicated by the reference numeral 25 wherein the developed and transferred xerograhpic powder image on the sheet is permanently affixed thereto.
  • the copy is either discharged from the reproduction machine into the collator 24 or routed back to paper handling mechanism 21 in a manner to be hereinafter described.
  • the toner particles remaining as residue on the developed image, background particles, and those particles otherwise not transferred are carried by the belt 12 to a cleaning apparatus positioned on the run of the belt between rollers l4 and 16 adjacent the charging device 13.
  • the cleaning device comprising a rotating brush 26 and a corona emission device 27 for neutralizing charges remaining on the particles, is connected to a vacuum source (not shown) for removing the neutralized toner particles from the belt prior to the formation of subsequent images thereon.
  • an inverter-reverser mechanism adapted to receive copy sheets from the fuser 2S and route the fused copies either to the paper handling mechanism 21 or the collator 24.
  • the inverter-reverser mechanism includes a first transport 30 adapted to receive fused copies from the fuser for transport to the collator.
  • the sheets from the fuser are transported by transport t by roll 34 and a cooperating roll'36.
  • the sheet is advanced by rolls 34, 36 betweenan upper sheet guide baffle 46 anda lower sheetguide baffle 48 to a second feed roll pair 38, 40 which further advance the sheet to a transport mechanism 42 (see FIG; 1) which carries the sheet to paper handling mechanism 21.
  • the paper handling mechanism 20 may be inactivated and the paper handling mechanism 21 activated. It should be understood that in following the paper path around roller 34 and between feed roll pair 38, 40, the copy sheets are turned over, i.e.,the printed material is on the top of the sheets in paper handling mechanism 21.
  • the sheets from paper handling mechanism 21 are fed through the reproduction machine for copying on the blank side of the sheet in the same manner as described heretofore.
  • the sheet stop 44 is formed of a resilient material such as a doughnut or ring shaped, flexible, polyurethane foam having a very low local and bulk spring rate.
  • the foam ring does not damage light paper and is compliant enough to accept a large mass range (6.0: 1) and adequate length range (approximately one-half inch variation in sheet length) without adjustment. Recovery of the foam ring to its circular shape is used to insert the sheet into the nip formed between roll 36 and a cooperating roll 50, the trailing tofore, is adapted to receive single sided copy face 7 down for collation purposes.
  • the disclosed reverser-inverter device is capable of extremely high speed operation without damaging the I I What is claimed is:
  • a reproduction system for producing single sided and double sided copy comprising:
  • a reproduction machine including a first sheet handling means and a second sheet handling means for feeding sheets seriatim through said reproduction machine to produce copy thereon;
  • transport means associated with said reproduction machine for transporting sheets having copy thereon through a first'path to a location external of said reproduction machine
  • deflector means associated with said transport to deflect copies from said transport along a second path to said second sheet handling means; resilient stop means adapted for movement into said second path for contacting the leading edge of a sheet passing therethrough to stop the sheet and reverse the direction of movement thereof;
  • feed means adapted for contact with the edge of the sheet opposite the edge contacted by said stop means for feeding the sheet into said first path for delivery of the sheet to a location external of said reproduction machine.
  • a reproduction system further including a first feed roll and a second feed roll forming a first feed roll pair, said deflector means being adapted to deflect sheets between said first feed roll pair for movement of the sheets into said second path; and,
  • third and fourth rolls forming a second roll pair along said second path downstream from said first roll pair, said third and fourth rolls being mounted for movement relative to each other, said resilient stop means being located immediately downstream from said second roll pair, said third and fourth rolls being movable away from each other when said stop means is moved into said second path, movement of said third and fourth rolls away from each other effectively negating the sheet feeding capability of said second roll pair.
  • a reproduction system wherein said feed means includes a fifth roll, said fifth roll being adapted for cooperation with said second roll to form a third roll pair, reversal of the sheet movement by said resilient stop means causing the edge of the sheet opposite said stop means to be engaged between said third roll pair for movement in a direction away from said stop means into said first path for delivery of the sheet to a location external of said reproduction machine.
  • said resilient stop means is comprised of a resilient ring, contact of the lead edge of a sheet with said ring causing said ring to collapse, recovery of the ring to its circular shape causing the sheet to move in a direction opposite to the direction from which the sheet struck said stop.
  • a reproduction system according to claim 4 wherein said resilient ring is formed of polyurethane foam having a very low local and bulk spring rate to prevent damage to light sheets, said stop ring being compliant enough to accept a large range of sheet mass.
  • a reproduction system further including a collator, said sheets being fed through said first path to said collator for collation therein.
  • a reproduction system further including upper and lower guide means defining said second path downstream from said first roll pair,
US00429252A 1973-12-28 1973-12-28 Inverter-reverser for a reproduction machine Expired - Lifetime US3856295A (en)

Priority Applications (10)

Application Number Priority Date Filing Date Title
US00429252A US3856295A (en) 1973-12-28 1973-12-28 Inverter-reverser for a reproduction machine
DE2448854A DE2448854C3 (de) 1973-12-28 1974-10-14 Kopiergerät zum wahlweisen Herstellen von einseitigen und doppelseitigen Kopien
CA212,600A CA1024925A (en) 1973-12-28 1974-10-29 Inverter-reverser for a reproduction machine
FR7436619A FR2256038B1 (de) 1973-12-28 1974-11-04
BR9371/74A BR7409371A (pt) 1973-12-28 1974-11-07 Sistema de reproducao para a producao de copias de um e de dois lados
NL7414928A NL7414928A (nl) 1973-12-28 1974-11-15 Reproduktiestelsel voor het vervaardigen van enkelzijdige en dubbelzijdige kopieen.
AU75488/74A AU7548874A (en) 1973-12-28 1974-11-18 Inverter-reverser for sheets
GB50283/74A GB1487954A (en) 1973-12-28 1974-11-20 Apparatus for inverting a sheet moving in a first direction and causing said inverted sheet to move in a second direction
JP49138282A JPS599053B2 (ja) 1973-12-28 1974-12-02 両面複写装置
IT31025/74A IT1028054B (it) 1973-12-28 1974-12-24 Apparecchiatura di riproduzione a stampa su una o ambedue le facoe di un foglio da copia

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US00429252A US3856295A (en) 1973-12-28 1973-12-28 Inverter-reverser for a reproduction machine

Publications (1)

Publication Number Publication Date
US3856295A true US3856295A (en) 1974-12-24

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Family Applications (1)

Application Number Title Priority Date Filing Date
US00429252A Expired - Lifetime US3856295A (en) 1973-12-28 1973-12-28 Inverter-reverser for a reproduction machine

Country Status (10)

Country Link
US (1) US3856295A (de)
JP (1) JPS599053B2 (de)
AU (1) AU7548874A (de)
BR (1) BR7409371A (de)
CA (1) CA1024925A (de)
DE (1) DE2448854C3 (de)
FR (1) FR2256038B1 (de)
GB (1) GB1487954A (de)
IT (1) IT1028054B (de)
NL (1) NL7414928A (de)

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US3942785A (en) * 1974-11-25 1976-03-09 Xerox Corporation Self-actuating sheet inverter reverser
US3944212A (en) * 1974-11-25 1976-03-16 Xerox Corporation Sheet reversing mechanism
US3948505A (en) * 1974-11-01 1976-04-06 Control Data Corporation Document turn-around sorter/stacker
US3966194A (en) * 1974-03-28 1976-06-29 Agfa-Gevaert, A.G. Apparatus for manipulating finished reproductions in copying machines
US3999852A (en) * 1973-01-17 1976-12-28 Canon Kabushiki Kaisha Copying apparatus capable of both-side printing
US4007669A (en) * 1974-07-04 1977-02-15 Windmoller & Holscher Apparatus for reversing the running direction of tube sections in sack machines
US4017173A (en) * 1974-01-11 1977-04-12 Canon Kabushiki Kaisha Copying apparatus for copying a plurality of original surfaces with a single scan
US4019435A (en) * 1975-08-21 1977-04-26 Addressograph Multigraph Corporation Sheet inverting
US4050805A (en) * 1975-11-18 1977-09-27 Eastman Kodak Company Electrophotographic copying apparatus for two-sided copying
US4080060A (en) * 1975-08-01 1978-03-21 Addressograph-Multigraph Corporation Copy system
US4098551A (en) * 1975-02-13 1978-07-04 Canon Kabushiki Kaisha Both side copying machine
US4116558A (en) * 1977-02-09 1978-09-26 Xerox Corporation Duplex system and method for pre-collation copiers
US4140387A (en) * 1976-06-01 1979-02-20 Eastman Kodak Company Apparatus for producing collated copies from two sided originals
DE2828598A1 (de) * 1977-08-30 1979-03-15 Xerox Corp Verfahren zum herstellen von duplexkopien von einer vielzahl von originaldokumenten sowie diesbezuegliche vervielfaeltigungsmaschine
US4174905A (en) * 1977-02-14 1979-11-20 Eastman Kodak Company Method and apparatus for producing duplex copies
US4191369A (en) * 1977-06-01 1980-03-04 Oriental Photo Industrial Co., Ltd. Means for guiding sheet-like printing paper
US4214740A (en) * 1978-05-02 1980-07-29 Xerox Corporation Sheet reversing mechanism
US4234180A (en) * 1979-06-27 1980-11-18 Xerox Corporation Recirculating document handler configuration
US4238126A (en) * 1979-08-31 1980-12-09 Xerox Corporation Recirculating simplex/duplex document handler
EP0047181A2 (de) * 1980-09-02 1982-03-10 Xerox Corporation Substrat-Umkehrvorrichtung
US4348101A (en) * 1980-09-30 1982-09-07 Sperry Corporation Duplex printing apparatus
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US4431303A (en) * 1981-11-04 1984-02-14 Xerox Corporation Sheet handling apparatus for use with a very high speed duplicator
DE3330390A1 (de) * 1982-08-23 1984-02-23 Xerox Corp., 14644 Rochester, N.Y. Umkehrbarer rollen-inverter mit umgehungsmoeglichkeit
US4466607A (en) * 1982-03-08 1984-08-21 The Mead Corporation Sheet inverting device
US4493483A (en) * 1979-01-31 1985-01-15 Xerox Corporation Inverter-reverser for a reproduction machine
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US4645195A (en) * 1985-07-03 1987-02-24 Eastman Kodak Company Sheet-registration and feeding apparatus
US4660963A (en) * 1985-12-30 1987-04-28 Xerox Corporation Auto duplex reproduction machine
US4669717A (en) * 1984-05-11 1987-06-02 Kabushiki Kaisha Toshiba Recording apparatus
US4673176A (en) * 1980-10-02 1987-06-16 Xerox Corporation Soft nip damping inverter
US4692020A (en) * 1984-11-17 1987-09-08 Ricoh Company, Ltd. Sheet reversing in copying machine and other sheet-handling machines
US4699367A (en) * 1986-02-24 1987-10-13 Eastman Kodak Company Sheet turnover mechanism
USRE32541E (en) * 1976-01-15 1987-11-10 Xerox Corporation Fluidic feeding of documents to an exposure station
US4708468A (en) * 1985-12-30 1987-11-24 Xerox Corporation Self adjusting paper guide
US4708462A (en) * 1985-12-30 1987-11-24 Xerox Corporation Auto duplex reproduction machine
US4842263A (en) * 1983-06-08 1989-06-27 Xerox Corporation Sheet reversing apparatus
US4867437A (en) * 1988-02-26 1989-09-19 The Psychological Corporation Method and apparatus for stacking sheet articles in their original order in a selected one of a pair of hoppers
US4987455A (en) * 1989-11-22 1991-01-22 Eastman Kodak Company Multicolor imaging apparatus
US4994858A (en) * 1989-11-22 1991-02-19 Eastman Kodak Company Electrostatographic apparatus for forming multicolor images on a receiving sheet
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US4459013A (en) * 1977-08-18 1984-07-10 Xerox Corporation Duplex/simplex precollation copying system
US4162844A (en) * 1977-08-30 1979-07-31 Xerox Corporation Reproduction machine with duplex image shift
JPS54149636A (en) * 1978-05-16 1979-11-24 Ricoh Co Ltd Copier
US4191465A (en) * 1978-07-03 1980-03-04 Eastman Kodak Company Apparatus for producing simplex of duplex copies
US4272181A (en) * 1978-12-29 1981-06-09 International Business Machines Corporation Electrophotographic printer with duplex printed sheet output
JPS55105258A (en) * 1979-02-08 1980-08-12 Canon Inc Both side image forming device
US4264187A (en) * 1979-05-14 1981-04-28 International Business Machines Corporation Document handler
JPS5691249A (en) * 1979-12-25 1981-07-24 Canon Inc Copying machine which permits one-side and both-side copying
DE3138220A1 (de) * 1980-09-27 1982-05-06 Canon K.K., Tokyo Papiertransporteinrichtung
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JPS5875163A (ja) * 1982-09-08 1983-05-06 Canon Inc 両面原稿制御方法
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CA1214820A (en) * 1982-11-22 1986-12-02 Richard C. Schenk Copy sheet inverter with adjustable stop mechanism
JPS5977454A (ja) * 1983-05-13 1984-05-02 Canon Inc 両面複写制御装置
JPS60118569A (ja) * 1983-11-25 1985-06-26 Canon Inc 紙葉体排出装置
JPS6180755U (de) * 1984-11-01 1986-05-29
JPS61222800A (ja) * 1985-03-28 1986-10-03 砂川　武義 模様入り装置・装飾品の製造方法
JPH0332394Y2 (de) * 1985-09-11 1991-07-09
US4699365A (en) * 1986-05-13 1987-10-13 Eastmak Kodak Company Recirculating document feeder
JPS632742U (de) * 1986-06-23 1988-01-09
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Cited By (49)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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Also Published As

Publication number Publication date
FR2256038A1 (de) 1975-07-25
FR2256038B1 (de) 1978-08-11
NL7414928A (nl) 1975-03-27
DE2448854B2 (de) 1980-05-14
DE2448854C3 (de) 1981-01-29
DE2448854A1 (de) 1975-07-10
IT1028054B (it) 1979-01-30
BR7409371A (pt) 1976-05-18
AU7548874A (en) 1976-05-20
JPS5099553A (de) 1975-08-07
GB1487954A (en) 1977-10-05
CA1024925A (en) 1978-01-24
JPS599053B2 (ja) 1984-02-29

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