US3363474A - Straight guiding device - Google Patents
Straight guiding device Download PDFInfo
- Publication number
- US3363474A US3363474A US470291A US47029165A US3363474A US 3363474 A US3363474 A US 3363474A US 470291 A US470291 A US 470291A US 47029165 A US47029165 A US 47029165A US 3363474 A US3363474 A US 3363474A
- Authority
- US
- United States
- Prior art keywords
- arm
- guiding device
- straight guiding
- pivot point
- straight
- 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
Links
- 238000003466 welding Methods 0.000 description 11
- 230000007246 mechanism Effects 0.000 description 6
- 238000010276 construction Methods 0.000 description 4
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21F—WORKING OR PROCESSING OF METAL WIRE
- B21F27/00—Making wire network, i.e. wire nets
- B21F27/08—Making wire network, i.e. wire nets with additional connecting elements or material at crossings
- B21F27/10—Making wire network, i.e. wire nets with additional connecting elements or material at crossings with soldered or welded crossings
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H37/00—Combinations of mechanical gearings, not provided for in groups F16H1/00 - F16H35/00
- F16H37/12—Gearings comprising primarily toothed or friction gearing, links or levers, and cams, or members of at least two of these types
- F16H37/124—Gearings comprising primarily toothed or friction gearing, links or levers, and cams, or members of at least two of these types for interconverting rotary motion and reciprocating motion
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H37/00—Combinations of mechanical gearings, not provided for in groups F16H1/00 - F16H35/00
- F16H37/12—Gearings comprising primarily toothed or friction gearing, links or levers, and cams, or members of at least two of these types
- F16H2037/128—Generating reciprocating motion by a planetary gear (ratio 2:1) using endless flexible members
-
- 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
- Y10T74/00—Machine element or mechanism
- Y10T74/18—Mechanical movements
- Y10T74/18056—Rotary to or from reciprocating or oscillating
- Y10T74/18272—Planetary gearing and slide
Definitions
- a straight guiding device has a first arm pivoted between its ends, a second arm pivoted to one end of the first arm, and cam operated drive means connected to the other end. Guide means are provided between the first and second arms so that when the drive means tilt the first arm, the second arm will be tilted oppositely sufiiciently so that its free end will describe a straight line.
- the invention relates to straight guiding devices, and relates more particularly to straight guiding devices of the type wherein a main lever is tiltably movable about a fixed point and carries on its free end an auxiliary lever with which it is so connected that the tilting movement of the main lever will cause an angularly opposite tilting movement of the auxiliary lever.
- the free end of the auxiliary lever will describe a rectilinear movement.
- Straight guiding devices heretofore used were of two kinds, namely one wherein the drive connection between two levers was carried out by means of a parallelogram and gearing, and the other by means of a parallelogram and connecting rods.
- the former had the disadvantage that the backlash of the gears which worsened with wear did not readily admit of adjustment, so that with increased use the predetermined angular displacement between the levers differed increasingly from its theoretical value.
- the latter construction while not so much subject to wear, was complex and expensive, and did not admit of adjustment.
- the invention consists in the novel construction, arrangement and combination of various devices, elements and parts, as set forth li'l the claims hereof, one embodiment of the same being illustrated in the accompanying drawings and described in the specification.
- the instant invention is particularly suitable for the straight guiding of transverse wires to feed them along the longitudinal wires into an automatic welding machine, to be spot welded with the longitudinal wires by the welding machine into a welded mesh.
- the instant invention offers the advantage of simplicity for adjusting the distance needed for the welding machine between the transverse wires.
- FIG. 1 in a schematic view of a pair of interconnected levers, in accordance with the principle of the invention
- FIG. 2 is a schematic elevational view of a straight guiding device for use in connection with a wire mesh welding machine, in accordance with an embodiment of the invention, showing the device before the transverse wires are being fed into the machine;
- FIG. 3 is a schematic view, similar to FIG. 2, but showing the device after the transverse wires have been positioned in the welding machine;
- FIG. 4 is a fragmentary elevational view of a wire gripper, in accordance with a facet of the invention.
- FIG. 5 is a fragmentary schematic view, similar to FIGS. 2 and 3, but showing a constructional detail of the adjustable connection between the connecting rods and the tiltable levers.
- FIG. 1 there is provided a main lever or first tiltable arm 1 and an auxiliary lever or second tiltable arm 2.
- first arm 1 When the first arm 1 is tilted from the vertical center line throughout the angle alpha, the second arm 2 will be tilted in the opposite direction throughout twice that angle.
- the free end C of the second arm 2, during that movement, describes a straight path along the straight line CC'.
- the construction of this device is as follows: The first arm 1 is pivoted to a fixed pivot point A and is tiltable about the same, through otherwise immovable.
- the second arm 2 is pivoted with one end at B to the free end portion of the first arm 1.
- Guide means are provided connecting the arms 1 and 2 in such a manner that when the arm 1 is tilted about the pivot point A throughout a primary angle, the arm 2 will oppositely be tilted about the pivot point B for a secondary angle between the arms 1 and 2 which is twice the primary angle.
- the guide means comprise a driving element, such as a wheel 3 that is immovably concentrically mounted to the pivot point A.
- the wheel 3 may either have a smooth surface, or may be a gear, or sprocket wheel, or rope or belt pulley; a driven element, such as a wheel 4 which is secured to the second arm 2 and is rotatable therewith about the pivot point B as a fulcrum and the surface of which will match that of the wheel 3, and thus will be either smooth, or be a gear or a sprocket wheel or pulley; and, lastly, a preferably adjustable interconnecting means, such as an endless member 5, for instance a chain or one or more ropes, or a belt, or the like, interconnecting the wheels 3 and 4.
- a driven element such as a wheel 4 which is secured to the second arm 2 and is rotatable therewith about the pivot point B as a fulcrum and the surface of which will match that of the wheel 3, and thus will be either smooth, or be a gear or a sprocket wheel or pulley
- a preferably adjustable interconnecting means such as an endless member
- the diameter of the wheel 3 is twice that of the wheel 4, so that the diameters are at a ratio of 2:1.
- the second arm 2 will be tilted relative to the first arm 1 throughout a secondary angle of twice the size of the angle alpha.
- the free end C of the second arm 2 is thereby guided rectilinearly along the straight line C-C'.
- the paths of the arms 1 and 2 may suitably be so arranged relative to the wheels 3 and 4 that the arm 2 may pass without obstruction past the pivot point A into the position 2.
- FIGS. 2 and 3 there is shown an exemplification of applying the instant straight guiding device, in accordance with the invention, to the simultaneous feeding of two transverse wires Q and Q into a welding machine.
- the wires Q and Q Prior to feeding, the wires Q and Q are positioned at rest in a dispenser 10.
- the transverse wires Q and Q are to be positioned between the electrode pairs 9 and 9' of the wire mesh spot welding machine.
- FIG. 2 the straight guiding device is illustrated at rest immediately before the pick-up of the transverse wires Q and Q while in FIG. 3 the device is shown in position when the transverse wires Q and Q have been positioned in the machine between the respective electrodes.
- the straight guiding device of FIGS. 2 and 3 com prises two straight guiding mechanisms.
- One of these guiding mechanisms comprises the first arm 1, the second arm 2, the wheels 3 and 4 with the interconnecting means 5, an extension of the first arm 1 to a point B, and a con necting rod 6; the free end point C of the second arm 2 moves linearly along the line CC'.
- the other guiding mechanism comprises the first arm 1', the second arm 2' with its free end C, wheels 3' and 4 and interconnecting means 5' therebetween, the extension of the arm 1 to the point E and a connecting rod 6'.
- the free end C of the second arm 2 moves linearly along the straight line C-C.
- the connecting rods 6 and 6 are connected together at a pivot point P, and each is tiltable about the pivot point F as a fulcrum.
- Driving means are provided, such as a cam and cam follower means, for instance a rotatable cam 12 and a cam follower roll 8.
- the cam follower roll 8 is revolvably mounted on a spring pressed drive lever 7 that is pivoted to a fixed point G and to the pivot point P.
- Each of the first arms 1, 7 carries its second arm 2, 2 near its upper end portion at B, B; and terminates its lower end portion at E, E, respectively.
- Each wheel 3, 3' is thus mounted on its respective first arm 1, 1 between the end portions thereof, its center A (FIG. 2) serving, as previously described, as the journalling point for the arm 1, 1.
- Each of the second arms 2, 2 has near its free ends C, C a gripper for releasably gripping one of the transverse wires Q Q respectively.
- Each gripper comprises a lip 14 and a shoulder 15 against which there may be positioned a transverse wire; a clamp 16 is pivoted to the second arm 2, 2, and is resiliently held in position wherein it presses the transverse wire against the lip 14 and the shoulder 15 (as shown in FIG. 4).
- a movable lifting mechanism 11 Upon actuation of the device of FIGS. 2 and 3, a movable lifting mechanism 11 will raise the transverse wires Q and Q ed the dispenser 10 into the respective grippers which, as previously described, are positioned near the free ends C and C, respectively of the second arms 2, 2'.
- the cam'and cam follower means 12, 8 will move the lever'7, which will cause the connecting rods 6, 6 to tilt, owing to the pivot connections at E, E, the first arms 1 and 1'.
- the free ends C, C of the second arms 2, 2' which carry in their grippers the wires Q Q will be shifted in the direction P along the straight line C-C, until the free ends C, C" have positioned the wires Q Q between the electrode pairs 9, 9', respectively (FIG. 3).
- driving means have been shown as cam and cam follower means'12, 8, other conventional suitable means may be used instead without departing from the spirit and scope of the invention, except as limited in the claims hereof.
- the wires Q Q When the distance between the transverse wires in the wire mesh is to be changed, the wires Q Q will need to be spaced apart in the end position for a different distance.
- it In order to adjust the guiding device to the new end distance betweenthe electrode pairs 9, 9', it will be necessary to change the distances A-E and, respectively, AE.
- This requires a change of the connection between the connecting rods 6, 6 to the first arms 1, 1', respectively; one may need to change at the same time the lengths PE and F-E of the connecting rods 6, 6'; so that the free ends C, C will return into the position shown in FIG. 2 for receiving the transverse wires Q and Q to be fed into the welding machine.
- this adjustment is carried out by means of arcuate guide slots 13, 13' formed at the points E, E of the first arm 1, 1, respectively.
- the slots 13, 13 are arcuate about the fulcrum F.
- Each connecting rod 6, 6' carries a block that is guided in the respective slot 13, 13 and is adjustably positionable therein.
- One or several of the straight guiding devices of FIGS. 2 and 3 may be used for each welding machine.
- a straight guiding device the combination of two guiding mechanisms each comprising a first arm having a free end portion and another end portion and being between said end portions tiltably journalled about a fixed pivot point, a second arm rotatably connected with one end to said free end portion of said first arm, and guide means operable for connecting said one end of said second arm to said first arm in such a manner that when said first arm is tilted about said fixed pivot point the sec- 0nd arm will be tilted oppositely relative to said first arm, whereby the free end of said second arm will describe a rectilinear motion
- said guide means comprising a driving element mounted immovabley concentrically about said fixed pivot point, a driven element secured to said second arm and rotatable therewith, interconnecting means extending between and connecting said elements, said elements being so dimensioned that the tilting of said first arm about said pivot point throughout a primary angle will cause rotation of said second arm relative to said first arm throughout a secondary angle equalling twice said primary angle, and drive means operable for
- a straight guiding device the combination of a first arm tiltably journalled about a fixed pivot point and having a free end portion, a second arm rotatably connected with one end to said free end portion of said first arm, and guide means operable for connecting said one end of said second arm to said first arm in such a manner that when said first arm is tilted above said fixed pivot point the second arm will be tilted oppositely relative to said first arm, whereby the free end of said second arm will describe a rectilinear motion
- said guide means comprising a first wheel mounted immovably concentrically about said fixed pivot point, a second wheel secured to said second arm and rotatable therewith, interconnecting means extending between and connecting said wheels, said wheels being so dimensioned that the tilting of said first arm about said pivot point throughout an angle of a predetermined magnitude will cause rotation of said second arm relative to said first arm throughout an angle of twice said predetermined magnitude, said first arm being journalled to said pivot point at a portion between its end portions, and drive means operable for
- connecting rod being pivoted at a fulcrum with relation to said cam follower means and having a free end section movable about said fulcrum along a peripheral arc, connecting means disposed between said other end portion of said first arm and said end section of said connecting rod comprising an arcuate guiding slot defined Q3 connected to said end section of said connecting rod guided and adjustably positionable in said slot, for the stepless changing of the amplitudes of said second end portion of said first arm during the oscillation movement of said first arm.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Transmission Devices (AREA)
- Wire Processing (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT588664A AT252692B (de) | 1964-07-08 | 1964-07-08 | Geradführungsvorrichtung, insbesondere zum Zuführen der Querstäbe bei Gitterschweißmaschinen |
Publications (1)
Publication Number | Publication Date |
---|---|
US3363474A true US3363474A (en) | 1968-01-16 |
Family
ID=3580614
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US470291A Expired - Lifetime US3363474A (en) | 1964-07-08 | 1965-07-07 | Straight guiding device |
Country Status (5)
Country | Link |
---|---|
US (1) | US3363474A (de) |
AT (1) | AT252692B (de) |
CH (1) | CH432440A (de) |
GB (1) | GB1099905A (de) |
NL (1) | NL6605072A (de) |
Cited By (20)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3802280A (en) * | 1970-08-10 | 1974-04-09 | Fmc Corp | Box wrapping machine |
US4360187A (en) * | 1981-06-19 | 1982-11-23 | Chapman Leonard T | Compact hoisting device |
US4364706A (en) * | 1980-06-25 | 1982-12-21 | Kranzlmueller Reinhard | Carrier apparatus for vertical and horizontal transportation of loads |
US4509939A (en) * | 1980-12-06 | 1985-04-09 | Heidelberger Druckmaschinen Ag | Folding device for web-fed rotary printing presses |
US4515025A (en) * | 1981-09-28 | 1985-05-07 | Girogioni Di A. Giorgioni & C. S.A.S. | Apparatus for driving take-up elements for palletizable load units |
US4548236A (en) * | 1983-04-06 | 1985-10-22 | Fmc Corporation | Vehicle supported foldable service conduit |
FR2588526A1 (fr) * | 1985-10-16 | 1987-04-17 | Aerospatiale | Mecanisme de deploiement automatique d'un appendice d'un vehicule spatial anime d'un mouvement de rotation sur lui-meme. |
US4703907A (en) * | 1986-11-05 | 1987-11-03 | Aerospatiale Societe Nationale Industrielle | Mechanism for the automatic extension of an appendage of a space vehicle performing a rotary movement on itself |
WO1987007078A1 (en) * | 1986-05-16 | 1987-11-19 | Eastman Kodak Company | Article transfer apparatus |
US4728252A (en) * | 1986-08-22 | 1988-03-01 | Lam Research Corporation | Wafer transport mechanism |
EP0265568A1 (de) * | 1986-10-31 | 1988-05-04 | AEROSPATIALE Société Nationale Industrielle | Automatische Entfaltungseinrichtung für ein Ansatzteil eines drehenden Raumfahrzeuges |
US4836733A (en) * | 1986-04-28 | 1989-06-06 | Varian Associates, Inc. | Wafer transfer system |
US4897015A (en) * | 1987-05-15 | 1990-01-30 | Ade Corporation | Rotary to linear motion robot arm |
US5037068A (en) * | 1989-03-28 | 1991-08-06 | Meccanica Italiana S.R.L. | Hoisting device |
US5064340A (en) * | 1989-01-20 | 1991-11-12 | Genmark Automation | Precision arm mechanism |
US5096364A (en) * | 1986-04-28 | 1992-03-17 | Varian Associates, Inc. | Wafer arm handler mechanism |
EP0925873A2 (de) * | 1997-12-03 | 1999-06-30 | Kitamura Machinery Co.,Ltd. | Werkzeugmaschine mit linearen Zuführmitteln |
US20040245314A1 (en) * | 2003-06-06 | 2004-12-09 | Esec Trading Sa | Wire bonder |
BE1016689A5 (nl) * | 2005-07-20 | 2007-04-03 | Baets Luc De | Inrichting voor het verplaatsen van een voorwerp. |
US20100036525A1 (en) * | 2006-12-19 | 2010-02-11 | Abb Research Ltd. | Parts handling device, system and method |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
AT368045B (de) * | 1980-03-31 | 1982-08-25 | Evg Entwicklung Verwert Ges | Vorrichtung zum zufuehren von querstaeben zu einer gitterschweissmaschine |
AT373799B (de) * | 1981-07-28 | 1984-02-27 | Evg Entwicklung Verwert Ges | Vielpunktschweissmaschine zum herstellen von gittern oder gitterrosten |
DE10122398C1 (de) * | 2001-05-09 | 2002-10-02 | Jaeger Emil Gmbh Co Kg | Querdrahtzuführung für eine Gitterschweißmaschine, mit wählbarer Zangen-Bahnkurve, und Schweißmaschine mit einer derartigen Querdrahtzuführung |
CN102359557B (zh) * | 2011-08-06 | 2014-08-20 | 刘之乾 | 频率及间歇转速可调的齿式自动换向器 |
DE102017207585B4 (de) * | 2017-05-05 | 2021-04-01 | Wafios Umformtechnik Gmbh | Drahtumformmaschine und Verfahren zur Herstellung von Umformteilen aus Draht |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1897140A (en) * | 1925-08-27 | 1933-02-14 | Perez Manuel Humberto | Mechanical movement |
US3010587A (en) * | 1957-09-20 | 1961-11-28 | Richard G Hollinger | Workpiece transfer mechanism |
US3240360A (en) * | 1964-03-02 | 1966-03-15 | Gen Motors Corp | Work piece transfer device |
-
1964
- 1964-07-08 AT AT588664A patent/AT252692B/de active
-
1965
- 1965-04-12 CH CH510965A patent/CH432440A/de unknown
- 1965-05-17 GB GB20800/65A patent/GB1099905A/en not_active Expired
- 1965-07-07 US US470291A patent/US3363474A/en not_active Expired - Lifetime
-
1966
- 1966-04-15 NL NL6605072A patent/NL6605072A/xx unknown
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1897140A (en) * | 1925-08-27 | 1933-02-14 | Perez Manuel Humberto | Mechanical movement |
US3010587A (en) * | 1957-09-20 | 1961-11-28 | Richard G Hollinger | Workpiece transfer mechanism |
US3240360A (en) * | 1964-03-02 | 1966-03-15 | Gen Motors Corp | Work piece transfer device |
Cited By (23)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3802280A (en) * | 1970-08-10 | 1974-04-09 | Fmc Corp | Box wrapping machine |
US4364706A (en) * | 1980-06-25 | 1982-12-21 | Kranzlmueller Reinhard | Carrier apparatus for vertical and horizontal transportation of loads |
US4509939A (en) * | 1980-12-06 | 1985-04-09 | Heidelberger Druckmaschinen Ag | Folding device for web-fed rotary printing presses |
US4360187A (en) * | 1981-06-19 | 1982-11-23 | Chapman Leonard T | Compact hoisting device |
US4515025A (en) * | 1981-09-28 | 1985-05-07 | Girogioni Di A. Giorgioni & C. S.A.S. | Apparatus for driving take-up elements for palletizable load units |
US4548236A (en) * | 1983-04-06 | 1985-10-22 | Fmc Corporation | Vehicle supported foldable service conduit |
FR2588526A1 (fr) * | 1985-10-16 | 1987-04-17 | Aerospatiale | Mecanisme de deploiement automatique d'un appendice d'un vehicule spatial anime d'un mouvement de rotation sur lui-meme. |
US5096364A (en) * | 1986-04-28 | 1992-03-17 | Varian Associates, Inc. | Wafer arm handler mechanism |
US4836733A (en) * | 1986-04-28 | 1989-06-06 | Varian Associates, Inc. | Wafer transfer system |
WO1987007078A1 (en) * | 1986-05-16 | 1987-11-19 | Eastman Kodak Company | Article transfer apparatus |
US4728252A (en) * | 1986-08-22 | 1988-03-01 | Lam Research Corporation | Wafer transport mechanism |
EP0265568A1 (de) * | 1986-10-31 | 1988-05-04 | AEROSPATIALE Société Nationale Industrielle | Automatische Entfaltungseinrichtung für ein Ansatzteil eines drehenden Raumfahrzeuges |
US4703907A (en) * | 1986-11-05 | 1987-11-03 | Aerospatiale Societe Nationale Industrielle | Mechanism for the automatic extension of an appendage of a space vehicle performing a rotary movement on itself |
US4897015A (en) * | 1987-05-15 | 1990-01-30 | Ade Corporation | Rotary to linear motion robot arm |
US5064340A (en) * | 1989-01-20 | 1991-11-12 | Genmark Automation | Precision arm mechanism |
US5037068A (en) * | 1989-03-28 | 1991-08-06 | Meccanica Italiana S.R.L. | Hoisting device |
EP0925873A2 (de) * | 1997-12-03 | 1999-06-30 | Kitamura Machinery Co.,Ltd. | Werkzeugmaschine mit linearen Zuführmitteln |
EP0925873A3 (de) * | 1997-12-03 | 2000-06-21 | Kitamura Machinery Co.,Ltd. | Werkzeugmaschine mit linearen Zuführmitteln |
US20040245314A1 (en) * | 2003-06-06 | 2004-12-09 | Esec Trading Sa | Wire bonder |
US7159751B2 (en) * | 2003-06-06 | 2007-01-09 | Esec Trading Sa | Wire bonder |
BE1016689A5 (nl) * | 2005-07-20 | 2007-04-03 | Baets Luc De | Inrichting voor het verplaatsen van een voorwerp. |
US20100036525A1 (en) * | 2006-12-19 | 2010-02-11 | Abb Research Ltd. | Parts handling device, system and method |
US8855817B2 (en) * | 2006-12-19 | 2014-10-07 | Abb Research Ltd. | Parts handling device, system and method |
Also Published As
Publication number | Publication date |
---|---|
NL6605072A (de) | 1967-10-16 |
CH432440A (de) | 1967-03-31 |
AT252692B (de) | 1967-03-10 |
GB1099905A (en) | 1968-01-17 |
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