US3481018A - Electrical connector crimping apparatus - Google Patents

Electrical connector crimping apparatus Download PDF

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Publication number
US3481018A
US3481018A US609505A US3481018DA US3481018A US 3481018 A US3481018 A US 3481018A US 609505 A US609505 A US 609505A US 3481018D A US3481018D A US 3481018DA US 3481018 A US3481018 A US 3481018A
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US
United States
Prior art keywords
strip
crimping
connectors
connector
die
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
US609505A
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English (en)
Inventor
Lodevicus Lambertus Jo Kerkhof
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.)
TE Connectivity Corp
Original Assignee
AMP Inc
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 AMP Inc filed Critical AMP Inc
Application granted granted Critical
Publication of US3481018A publication Critical patent/US3481018A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R43/00—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors
    • H01R43/04—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors for forming connections by deformation, e.g. crimping tool
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R43/00—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors
    • H01R43/04—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors for forming connections by deformation, e.g. crimping tool
    • H01R43/048—Crimping apparatus or processes
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R43/00—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors
    • H01R43/04—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors for forming connections by deformation, e.g. crimping tool
    • H01R43/048—Crimping apparatus or processes
    • H01R43/055—Crimping apparatus or processes with contact member feeding mechanism
    • 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
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49002—Electrical device making
    • Y10T29/49117—Conductor or circuit manufacturing
    • Y10T29/49204—Contact or terminal manufacturing
    • Y10T29/49208—Contact or terminal manufacturing by assembling plural parts
    • Y10T29/49218—Contact or terminal manufacturing by assembling plural parts with deforming
    • 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
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/51—Plural diverse manufacturing apparatus including means for metal shaping or assembling
    • Y10T29/5147—Plural diverse manufacturing apparatus including means for metal shaping or assembling including composite tool
    • Y10T29/5148—Plural diverse manufacturing apparatus including means for metal shaping or assembling including composite tool including severing means
    • Y10T29/5149—Plural diverse manufacturing apparatus including means for metal shaping or assembling including composite tool including severing means to sever electric terminal from supply strip
    • 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
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/53—Means to assemble or disassemble
    • Y10T29/5313—Means to assemble electrical device
    • Y10T29/532—Conductor
    • Y10T29/53209—Terminal or connector
    • Y10T29/53213—Assembled to wire-type conductor
    • Y10T29/53235—Means to fasten by deformation

Definitions

  • the invention relates to a crimping machine to crimp electrical terminals on wires with the movable die member moving a section of the feeding mechanism away from the crimping area to permit a leg of the movable die member to move between a terminal sheared from a strip of terminals and the strip of terminals to perform a crimping operation without engagement with the terminal strip carried by the movable section of the feeding mechanism.
  • This invention relates to applicators and more particularly to applicator means for crimping electrical connectors onto electrical wires.
  • apparatus comprising a crimp ing anvil, a crimping die having a crimping recess defined by leg portions of the die, mechanism for feeding a strip of electrical connectors in side-by-side strip form between the die and the anvil to be crimped therebetween, mechanism for bringing about relative movement between the die and the anvil to cause a connector therebetween to be crimped to the wire between the anvil and the recess walls, and a shearing device for severing the connector between the die and the anvil from the strip.
  • the metal slugs separating the connectors should be short.
  • leg portions Since, however, one of the leg portions must be passed between two connectors of the strip during the crimping operation, it is necessary according to known practice to make this one leg portion sufficiently thin to pass between the two connectors, in which case the leg portion may be undesirably weak, or to make the spacing between the connectors sufficient to avoid this disadvantage.
  • An object of the invention is to provide a crimping applicator for crimping electrical connectors onto wires having means to move a strip of connectors away from a crimping area to permit a leg of a crimping die to pass between a severed connector to be crimped in the crimping area and the strip of connectors.
  • Another object of the invention is the provision of holding means to hold a severed connector in a crimping area of a crimping applicator while a strip of connectors from which the severed connector is severed is moved away from the crimping area.
  • a further object of the invention is to provide moving means on crimping die means of a crimping applicator to move a strip of connectors away from a crimping area during a crimping operation on a connector severed from the strip of connectors.
  • Apparatus comprises a mechanism for holding the connector in position for crimping between the die and the anvil, a mechanism for withdrawing the strip of connectors from the die and anvil after the operation of the shearing device, each connector being held, during the relative movement, in position for crimping relative to the die and the anvil by the holding mechanism, the strip being withdrawn by the withdrawing mechanism after the connector has been severed from the strip to allow one of the leg portions of the die to pass between the severed connector and the strip so as to permit the anvil to be received in the recess of the die.
  • the strip may conveniently be fed across a flat plate which is moved relative to the die and anvil by a cam surface movable with the crimping die.
  • the cam surface may conveniently be inclined and may mate with a complementary inclined surface on the plate.
  • FIGURE 1 is a side elevational view of apparatus for crimping electrical connectors to wires
  • FIGURE 2 is a plan view of part of the apparatus of FIGURE 1;
  • FIGURE 3 is a view taken on the lines III-III of FIGURE 1;
  • FIGURE 4 is an elevational view partly in section of a detail of FIGURE 1 with part removed;
  • FIGURE 5 is a plan view of part of a strip of electrical connectors.
  • the apparatus comprises a bed generally indicated by 1 upon which is mounted for horizontal sliding movement from right to left (as seen in FIGURE 1) and vice versa a connector strip guide plate 2- urged leftwardly (as seen in FIGURE 2) by springs 3 to an extent limited by an anvil assembly generally indicated by 4 and being fixed with the bed 1 on a base plate 5.
  • a connector strip guide plate 2- urged leftwardly (as seen in FIGURE 2) by springs 3 to an extent limited by an anvil assembly generally indicated by 4 and being fixed with the bed 1 on a base plate 5.
  • On the guide plate 2 are parallel connector strip guides 6 and 6.
  • a pressure pad 7 fixed to a pressure pad lifting handle 8, the pad 7 and the handle 8 being urged towards the plate 2 by respective springs 9 and 10.
  • a connector strip feed device is also on the plate 2 a pressure pad 7 fixed to a pressure pad lifting handle 8, the pad 7 and the handle 8 being urged towards the plate 2 by respective springs 9 and 10.
  • a feed finger 13 having a working tip 13' and being mounted rotatably upon the piston rod of a pneumatic piston-and-cylinder motor 14.
  • the finger 13 is urged by a spring (not shown) in an anti-clockwise (as seen in FIGURE 1) sense of rotation so that the tip 13' is urged towards the plate 2.
  • a pressure pad lifting cam 15 is rotatably mounted on the plate 2, being rotatable by means of a handle 16 to engage the handle 8 so as to raise the pad 7 against the action of the springs 9 and 10.
  • the anvil assembly 4 comprises a wire separating blade 18, on either side of which are upstanding anvils 19 to 22 each being surmounted by an arcuate section working surface as best seen in FIGURE 2.
  • the anvils 19 and 20 are separated from the anvils 21 and 22 by a spacer plate 23.
  • a shear block 24 Located adjacent the anvils 21 and 22 is a shear block 24 having shearing recesses 25 and 26 laterally offset from the anvils.
  • the assembly 27 comprises a crimping die 28 having crimping recesses 29 defined by legs 31 to 3.2. Behind (as seen in FIGURE 1) the die 28 are shear blades 33 and 34 dimensioned for snug reception in the respective recesses 25 and 26. Behind (as seen in FIG- URE 1) the blades 33 and 34 is a connector-hold-down plate 35 urged towards the assembly 4 by a spring 36 (FIGURE 4) through a push rod 37 to an extend limited by the blade 33.
  • the assembly 27 also comprises a cam 38 fixed to a carrier plate 39 which extends into a recess 39 defined by the bed 1 and assembly 4.
  • the cam 38 has an inclined cam surface 40 for co-operation with a complementary surface 41 on the plate 2.
  • FIGURE shows part of a strip of electrical connectors for use with the apparatus described above.
  • the strip comprises connectors 42 each comprising an electrical connecting portion 43, in this case a spade terminal, a first essentially U-section electrical ferrule 43 for crimping about the bared end of an electrically conductive core of an insulated wire (not shown), and a second essentially U-section crimping ferrule 44 for crimping about the insulation of the wire.
  • Each connector 42 is joined to the next adjacent connector or connectors by a metal slug 45.
  • the strip is in ladder, or side-by-side form, the longitudinal axes of the crimping ferrules 43 and 44 being parallel to one another.
  • the strip which will in practice comprise many hundred connectors, is wound upon a freely rotatable spool (not shown).
  • the free end of the strip is led along the plate 2 between the guides 6 and 6 and under the pad 7 (with the aid of the handle so that the leading connector of the strip lies with its ferrules 43 and 44 upon the respective anvils 21 and 19, the penultimate connector of the strip lying with its ferrules 43 and 44 on the respective anvils 22 and 20.
  • the strip is held firmly in position between the guides 6 and 6' by the pressure pad 7 under the action of the springs 9 and 10, the Working tip 13' of the feed finger 13 engaging a longitudinal edge of one of the connectors 42.
  • Insulated twin-wire comprises two parallel plastic insulated wires, the insulation of the two wires being formed integrally so that the wires are joined along their adjacent sides.
  • a pedal not shown
  • the plate 35 engages the leading and penultimate connectors of the strip and the blades 33 and 34 shear out the slug 45 from between the leading and penultimate connectors and from between the penultimate connector and the next preceding connector, in co-operation with the longitudinal edges of the respective recesses and 26.
  • the blades 33 and 34 penetraie progressively intothc recesses 25 and 26, and the spring 36 is progressively compressed.
  • the plate 35 serves to hold the leading and penultimate connectors 42 in position to maintain their ferrules 43 and 44 on the respective anvils after these connectors have been freed from the strip by the blades 33 and 34.
  • the cam surface 40 of the cam 38 engages the surface 41 of the plate 2 so that the plate 2 is moved rightwardly (as seen in FIGURES 1 and 2) against the action of the springs 3 until the surfaces 40 and 41 are in full engagement with one another.
  • the strip of connectors on the plate 2 is accordingly moved away from the connectors on the anvils so that towards the end of the working stroke of the ram, the leg 32 of the crimping die 28 can pass between the severed penultimate connector and the aforementioned next preceding connector which remains on the plate 2.
  • the ferrules are crimped to the wire ends by co-operation between the die 28 and the anvils which are received in the recesses 29 so that the ferrules are compressed between the recess walls and the working surfaces of the anvils.
  • the crimping operation begins as the plate 2 starts to move away from the assembly 4 and ends when the plate 2 has been fully displaced.
  • the ram assembly 27 then auiomatically carries out a return stroke to resume the position in which it is shown in FIGURE 1.
  • the piston rod of the motor 14 is advanced during the return stroke of the assembly 27, when the plate 2 has resumed its initial posi.ion under the action of the springs 3, so that the feed finger moves the strip of connectors on the plate 2 leftwardly (as seen in FIGURES 1 and 2) to advance two further connectors into position, for crimping on the anvils.
  • the feed finger 13 is driven through a return stroke by the motor 14 as the ram assembly begins to descend at the beginning of its next working stroke. As the finger 13 returns the working tip 13 is cammed over the connectors of the strip against the action of the spring of the finger 13.
  • this arm 32 may be sufficiently broad to ensure that the arm 32 does not fracture as a result of the crimping forces which are directed laterally of the arm 32.
  • the arm 31 may be less broad than either the arm 30 or the arm 32, since the arm 31 is subjected to equal and oppositely directed lateral crimping forces.
  • the invention has been described above in its application to apparatus for crimping the connectors simultaneously, the invention can also be applied with advantage where only one connector is to be crimped.
  • the present invention is, however, of particular advantage where the apparatus is arranged to crimp two connectors simultaneously, because the distance between the anvils and thus the widths of the anvil assembly is determined by the distance between the individual connectors of the strip.
  • the crimping die instead of the cam 38 may be employed directly to engage and move the plate 2.
  • the feed mechanism could be mounted to the bed 1 and the motor of the feed mechanism employed to move the plate 2.
  • the strip could be retracted prior to the crimping operation by a further feed finger operated, e.g. by the feed mechanism motor.
  • Apparatus for crimping electrical connectors in sideby-side strip form to wires comprising a crimping anvil, a crimping die having a crimping recess defined by leg portions of the die, means for feeding a strip of electrical connectors in successive stages between the die and the anvil to be crimped therebetween, means for bringing about relative movement between the die and the anvil to cause a connector therebetween to be crimped to a wire between the anvil and the recess walls, shearing means for severing a leading connector disposed between the die and the anvil from the strip of connectors, means for holding the connector in position between the die and the anvil for crimping therebetween, said holding means holding each severed connector in position for crimping by the die and the anvil, and withdrawing means for withdrawing the strip of connectors after the leading connector has been severed from the strip to allow one of the leg portions to pass between the severed connector and the strip so as to permit the anvil to be received
  • Apparatus according to claim 1 wherein a plate is mounted adjacent said die and anvil for movement relative to the die and anvil and on which said strip of connectors is fed between the die and anvil, said means for bringing about relative movement between said die and anvil comprising a press ram assembly, said press ram assembly including a part which engages the plate to cause the strip of connectors on the plate to be withdrawn from the die and anvil prior to the reception of the anvil in the recess.
  • Apparatus according to claim 2 wherein the part of the press ram assembly which engages the plate has a flat inclined surface mating with a complementary surface on the plate, and spring means engaging said plate so that the plate can be moved against the action of said spring means perpendicularly to the path of movement of the ram assembly.
  • the feeding means comprises a feeding mechanism mounted on the plate for movement therewith.
  • leading holding means comprises a connector hold-down member mounted on the ram assembly for movement relative thereto against the action of a spring, the connector to be sheared from said strip being resiliently engaged between the hold-down member and a counter-surface prior to or simultaneously with the shearing operation.
  • a press having one member movable with respect to another member to operate on a workpiece placed therebetween, operating means connected to said one member to move said one member relative to said other member, movable guide means disposed adjacent said members for guiding a strip of workpieces therealong between said members, feeding means mounted adjacent said guide means for feeding said strip of workpieces along said guide means to place a leading workpiece between said members, shearing means mounted adjacent said members to shear a leading workpiece from said strip of workpieces, holding means disposed adjacent said members for holding a sheared workpiece between said members, and means for withdrawing said strip of workpieces after the workpiece has been sheared from said strip of workpieces and is being held between said members to allow a leg of said movable member to pass between the sheared workpiece and said strip of workpieces to permit said members to operate on said sheared workpiece placed therebetween.
  • withdrawing means includes cooperating means on said 0pe'rating means and said guide means to move said guide means and said strip of workpieces thereon relative to said members upon operation of said operating means.

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Manufacturing Of Electrical Connectors (AREA)
US609505A 1966-01-27 1967-01-16 Electrical connector crimping apparatus Expired - Lifetime US3481018A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL6601056A NL6601056A (US06623731-20030923-C00012.png) 1966-01-27 1966-01-27

Publications (1)

Publication Number Publication Date
US3481018A true US3481018A (en) 1969-12-02

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ID=19795575

Family Applications (1)

Application Number Title Priority Date Filing Date
US609505A Expired - Lifetime US3481018A (en) 1966-01-27 1967-01-16 Electrical connector crimping apparatus

Country Status (9)

Country Link
US (1) US3481018A (US06623731-20030923-C00012.png)
BE (1) BE692697A (US06623731-20030923-C00012.png)
CH (1) CH444252A (US06623731-20030923-C00012.png)
DE (1) DE1615568B2 (US06623731-20030923-C00012.png)
ES (1) ES335860A1 (US06623731-20030923-C00012.png)
FR (1) FR1507981A (US06623731-20030923-C00012.png)
GB (1) GB1103617A (US06623731-20030923-C00012.png)
NL (2) NL6601056A (US06623731-20030923-C00012.png)
SE (1) SE305896B (US06623731-20030923-C00012.png)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3628228A (en) * 1969-03-28 1971-12-21 Amp Inc Apparatus for crimping electrical connectors to wires
US3763555A (en) * 1970-03-09 1973-10-09 Amp Inc Method of crimping electrical connectors to wires
US3789482A (en) * 1972-08-08 1974-02-05 J Ray Machine for splicing communication cables
FR2599193A1 (fr) * 1986-05-23 1987-11-27 Automatisme Robotique Applique Dispositif de sertissage automatique de pieces de connexion livrees en ligne
US4718160A (en) * 1986-07-10 1988-01-12 Panduit Corp. Terminal strip applicator
US4754536A (en) * 1986-12-23 1988-07-05 Amp Incorporated Apparatus and method for connectors of varying dimensions
US4805278A (en) * 1986-07-10 1989-02-21 Panduit Corp. Terminal strip applicator
US6367148B1 (en) 1997-06-25 2002-04-09 Panduit Corp. Terminal applicator movement control mechanism
US20090205205A1 (en) * 2006-06-16 2009-08-20 Schleuniger Holding Ag Clamping apparatus for a crimping machine and method for producing a crimped connection with a crimping machine and the clamping apparatus according to the invention
CN114502306A (zh) * 2019-07-05 2022-05-13 哈勃股份有限公司 用于压接连接器的带有定位装置的无模压接头
US11894648B2 (en) 2019-07-05 2024-02-06 Hubbell Incorporated Dieless crimp head with positioning devices for crimp connectors

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2760195A (en) * 1953-02-16 1956-08-28 Aircraft Marine Prod Inc Electrical eyelet applicating machine
US3184950A (en) * 1961-10-02 1965-05-25 Amp Inc Connector feeding device

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2760195A (en) * 1953-02-16 1956-08-28 Aircraft Marine Prod Inc Electrical eyelet applicating machine
US3184950A (en) * 1961-10-02 1965-05-25 Amp Inc Connector feeding device

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3628228A (en) * 1969-03-28 1971-12-21 Amp Inc Apparatus for crimping electrical connectors to wires
US3763555A (en) * 1970-03-09 1973-10-09 Amp Inc Method of crimping electrical connectors to wires
US3789482A (en) * 1972-08-08 1974-02-05 J Ray Machine for splicing communication cables
FR2599193A1 (fr) * 1986-05-23 1987-11-27 Automatisme Robotique Applique Dispositif de sertissage automatique de pieces de connexion livrees en ligne
GB2203081B (en) * 1986-07-10 1991-04-10 Panduit Corp Terminal strip applicator
WO1988000763A1 (en) * 1986-07-10 1988-01-28 Panduit Corp. Terminal strip applicator
GB2203081A (en) * 1986-07-10 1988-10-12 Panduit Corp Terminal strip applicator
US4805278A (en) * 1986-07-10 1989-02-21 Panduit Corp. Terminal strip applicator
US4718160A (en) * 1986-07-10 1988-01-12 Panduit Corp. Terminal strip applicator
US4754536A (en) * 1986-12-23 1988-07-05 Amp Incorporated Apparatus and method for connectors of varying dimensions
US6367148B1 (en) 1997-06-25 2002-04-09 Panduit Corp. Terminal applicator movement control mechanism
US20090205205A1 (en) * 2006-06-16 2009-08-20 Schleuniger Holding Ag Clamping apparatus for a crimping machine and method for producing a crimped connection with a crimping machine and the clamping apparatus according to the invention
US8544172B2 (en) * 2006-06-16 2013-10-01 Schleuniger Holding Ag Clamping apparatus for a crimping machine and method for producing a crimped connection with a crimping machine and the clamping apparatus according to the invention
CN114502306A (zh) * 2019-07-05 2022-05-13 哈勃股份有限公司 用于压接连接器的带有定位装置的无模压接头
US11894648B2 (en) 2019-07-05 2024-02-06 Hubbell Incorporated Dieless crimp head with positioning devices for crimp connectors

Also Published As

Publication number Publication date
ES335860A1 (es) 1967-12-16
NL6601056A (US06623731-20030923-C00012.png) 1967-07-28
DE1615568A1 (de) 1970-07-16
BE692697A (US06623731-20030923-C00012.png) 1967-07-03
CH444252A (fr) 1967-09-30
NL134664C (US06623731-20030923-C00012.png)
GB1103617A (en) 1968-02-21
FR1507981A (fr) 1967-12-29
SE305896B (US06623731-20030923-C00012.png) 1968-11-11
DE1615568B2 (de) 1971-11-25

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